To determine the probability density function (pdf) of the random variable z, which is defined as z = x + y, where x and y are independent uniform random variables with range [0, 1], we can use the convolution method.
First, let's find the cumulative distribution function (CDF) of z, denoted as Fz(z), which is the probability that z takes on a value less than or equal to z:
Fz(z) = P(Z ≤ z) = P(x + y ≤ z)
Since x and y are independent, the joint probability density function (pdf) can be expressed as the product of their individual pdfs:
fxy(x, y) = fx(x) * fy(y)
Since x and y are uniformly distributed in the range [0, 1], their pdfs are constant within this range and zero outside it:
fx(x) = 1 for 0 ≤ x ≤ 1, otherwise 0
fy(y) = 1 for 0 ≤ y ≤ 1, otherwise 0
Now, let's consider the range of z. Since x and y both have a range of [0, 1], the range of z will be [0, 2]. We can express the CDF of z as follows:
Fz(z) = P(x + y ≤ z) = ∫∫fxy(x, y) dx dy
To calculate this integral, we need to determine the limits of integration based on the range of z. Since both x and y are between 0 and 1, the limits of integration become:
0 ≤ x ≤ z - y
0 ≤ y ≤ z
Now, we can evaluate the integral:
Fz(z) = ∫∫fxy(x, y) dx dy
= ∫[0, z] ∫[0, z - y] 1 dx dy
= ∫[0, z] (z - y) dy
= z^2/2 - z^2/2
= z^2/2
Now that we have the CDF of z, we can find the pdf fz(z) by differentiating the CDF with respect to z:
fz(z) = d/dz [Fz(z)]
= d/dz [z^2/2]
= z
Therefore, the probability density function (pdf) of the random variable z is fz(z) = z for 0 ≤ z ≤ 2, and fz(z) = 0 otherwise.
To learn more about probability density function (pdf) refer below:
https://brainly.com/question/31479201
#SPJ11
Joni has a circular garden with a diameter of 14 feet. If she uses 2 teaspoons of fertilizer for every 25 square feet of garden, how much fertilizer will Joni need for her entire garden? Round to the nearest tenth.
Answer:
[tex]\boxed{\boxed{\sf{\:\:\:\green{12.3\: teaspoons}\:\:\:}}}[/tex][tex]\\[/tex]
Step-by-step explanation:
First, we need to find the area of the circular garden.
[tex]\\[/tex]
The formula for the area of a circle is:
[tex]\sf\qquad\dashrightarrow\rm{Area_{(Circle)} = \pi r^2}[/tex]
where:
π is approximately 3.14r is the radius (half of the diameter)[tex]\\[/tex]
So, in this case, the radius is:
[tex]\rm\implies{Radius = \dfrac{Diameter}{2} = \dfrac{14}{2} = 7\: ft}[/tex]
[tex]\\[/tex]
Substitute the given values into the given formula:
[tex]\rm\implies{Area_{(Circle)} = 3.14 \times 7^2}[/tex]
[tex]\rm\implies{Area_{(Circle)} = 3.14 \times 49}[/tex]
[tex]\rm\implies{Area_{(Circle)} = 153.86\: ft^2}[/tex]
[tex]\\[/tex]
Now we can use the given information to find out how much fertilizer Joni needs.
[tex]\\[/tex]
We know that she needs 2 teaspoons of fertilizer for every 25 square feet of garden.
[tex]\\[/tex]
So, we can set up a proportion:
[tex]\rm\implies{\dfrac{2\: teaspoons}{25\: ft^2} = \dfrac{x\: teaspoons}{153.86\: ft^2}}[/tex]
[tex]\\[/tex]
Cross-multiplying, we get:
[tex]\rm\implies{25x = 2 \times 153.86}[/tex]
[tex]\\[/tex]
Simplifying, we get:
[tex]\rm\implies{25x = 307.72}[/tex]
[tex]\rm\implies{\boxed{\boxed{\sf{\:\:\:x = \green{12.31\: teaspoons}\:\:\:}}}}[/tex]
[tex]\\[/tex]
[tex]\\[/tex]
[tex]\therefore[/tex] Joni will need approximately 12.3 teaspoons of fertilizer for her entire garden.
show that the function f(x) = |x − 4| is not differentiable at 4.
the limit of the difference quotient as h approaches 0 from both the left and the right does not exist, since the left-hand and right-hand limits are different: -1 from the left and 1 from the right. Therefore, f(x) = |x - 4| is not differentiable at x = 4.
To show that the function f(x) = |x - 4| is not differentiable at x = 4, we need to demonstrate that the limit of the difference quotient does not exist at x = 4.
Recall that the difference quotient for a function f(x) is defined as:
[f(x + h) - f(x)] / h
where h is a small nonzero number that approaches 0.
For f(x) = |x - 4|, we have:
f(x + h) = |(x + h) - 4| = |x + h - 4|
f(x) = |x - 4|
So the difference quotient is:
[f(x + h) - f(x)] / h = [|x + h - 4| - |x - 4|] / h
Now consider what happens when we approach x = 4 from the left, i.e., as x approaches 4 from values less than 4. In this case, we have x < 4, so we can simplify the difference quotient as follows:
[f(x + h) - f(x)] / h = [|x + h - 4| - |x - 4|] / h
= [-(x + h - 4) - (-x + 4)] / h
= [-x - h + 4 + x - 4] / h
= (-h) / h
= -1
Now consider what happens when we approach x = 4 from the right, i.e., as x approaches 4 from values greater than 4. In this case, we have x > 4, so we can simplify the difference quotient as follows:
[f(x + h) - f(x)] / h = [|x + h - 4| - |x - 4|] / h
= [(x + h - 4) - (x - 4)] / h
= (h) / h
= 1
To know more about function visit:
brainly.com/question/30721594
#SPJ11
elly and drew work together to collect data to estimate the percentage of their classmates who own a particular brand of shoe. using the same data, elly will construct a 90 percent confidence interval and drew will construct a 99 percent confidence interval. which of the following statements is true?
The correct statement in this scenario is: Drew's 99 percent confidence interval will be wider than Elly's 90 percent confidence interval.
When constructing a confidence interval, the level of confidence determines the width of the interval. A higher level of confidence requires a wider interval to capture a larger range of possible population values.
In this case, Drew's 99 percent confidence interval will be wider than Elly's 90 percent confidence interval because a 99 percent confidence level requires a larger range of values to be included in the interval, providing a higher level of certainty.
Know more about confidence interval here:
https://brainly.com/question/24131141
#SPJ11
a hospital director believes that 45% of the lab reports contain errors. a sample of 260 reports found 104 errors. is there sufficient evidence at the 0.10 level to refute the hospital director's claim? state the null and alternative hypotheses for the above scenario.\
There is no sufficient evidence to refute the hospital director's claim about lab report errors at the 0.10 level.
Is there sufficient evidence to refute the director's claim?Null Hypothesis:
Proportion of lab reports containing errors is equal to 45%.
Alternative Hypothesis:
Proportion of lab reports containing errors is not equal to 45%.
To determine if there is sufficient evidence to refute the hospital director's claim, we will perform hypothesis test using the given sample data.
Let p be the true proportion of lab reports containing errors.
We will use sample proportion "p" to estimate p.
In this case, p:
= 104/260
= 0.4.
Assuming null hypothesis is true (p = 0.45), we will calculate standard error [tex]SE = /\sqrt {(p * (1 - p)) / n)}[/tex] where n = sample size.
In this case, n = 260.
SE = [tex]\sqrt{((0.45 * (1 - 0.45)) / 260) }[/tex]
SE = 0.03085325067
SE = 0.031
Now, we will calculate the test statistic under null hypothesis:
z = (p - p) / SE
z = (0.4 - 0.45) / 0.031
z = -1.613
To determine whether to refute the null hypothesis at the 0.10 level, we compare absolute value of the test statistic (|z|) to the critical value for a two-tailed test at the significance level of 0.10.
The critical value for a two-tailed test at the 0.10 level is 1.645.
Since |z| = 1.61 > 1.645, we can accept the null hypothesis.
Read more about hypothesis
brainly.com/question/606806
#SPJ1
A useful graphical method of constructing the sample space for an experiment is:
a. a tree diagram
b. a pie chart
c. a histogram
d. an ogive
A useful graphical method of constructing the sample space for an experiment is a tree diagram that is option A.
A tree diagram is a useful graphical method of constructing the sample space for an experiment. It is a type of diagram used to represent the possible outcomes of an event. The diagram is structured in a way that each branch of the tree represents an event that can occur, and each level of the tree represents a stage in the experiment. By using a tree diagram, it is easier to visualize and understand all the possible outcomes of an experiment and the probabilities associated with each outcome. Therefore, option A is the correct answer.
To know more about graphical method,
https://brainly.com/question/29756293
#SPJ11
how many light bulbs must a company test to determine the mean number of hours that they will last? the company wants to be 90% confident that their mean is within 40 hours of the population mean (assume that the population standard deviation is 150). 38 39 13 78
The company should test at least 39 light bulbs to determine the mean number of hours with a 90% confidence level and a maximum error tolerance of 40 hours
What is Sample size?Sample size refers to the number of individual units or observations included in a sample. In statistics, when conducting research or collecting data, a sample is often taken from a larger population to make inferences or draw conclusions about the population as a whole. The sample size represents the number of units or individuals that are selected from the population to be included in the sample.
To determine the number of light bulbs the company must test, we can use the formula for sample size calculation in estimating a population mean.
The formula is:
[tex]n = (Z * \sigma / E)^2[/tex]
Where:
n is the required sample size.
Z is the z-score corresponding to the desired confidence level. For a 90% confidence level, the z-score is approximately 1.645.
σ is the population standard deviation (given as 150 hours).
E is the maximum error tolerance, which is 40 hours in this case.
Plugging in the values:
[tex]n = (1.645 * 150 / 40)^2[/tex]
[tex]n \approx(246.75 / 40)^2[/tex]
[tex]n \approx6.16875^2[/tex]
[tex]n \approx38.03[/tex]
Based on this calculation, the company should test at least 39 light bulbs to determine the mean number of hours with a 90% confidence level and a maximum error tolerance of 40 hours.
To know more about Sample size visit:
https://brainly.com/question/30647570
#SPJ4
find the first partial derivatives with respect to x, y, and z. w = 3xz x y
The partial derivatives of w with respect to x, y, and z are:
∂w/∂x = 3yz
∂w/∂y = 3xz
∂w/∂z = 3xy
To find the partial derivatives of w with respect to x, y, and z, we differentiate w with respect to each variable while treating the other variables as constants:
∂w/∂x = 3yz (differentiate 3xz with respect to x, treating y and z as constants)
∂w/∂y = 3xz (differentiate 3xz with respect to y, treating x and z as constants)
∂w/∂z = 3x*y (differentiate 3xz with respect to z, treating x and y as constants)
Therefore, the partial derivatives of w with respect to x, y, and z are:
∂w/∂x = 3yz
∂w/∂y = 3xz
∂w/∂z = 3xy
To know more about partial derivatives refer here:
https://brainly.com/question/31397807
#SPJ11
is the precipitation raster an integer or a floating point raster? examine its properties to check the answer.
To determine whether a precipitation raster is an integer or a floating-point raster, you can examine its properties or metadata. Here are a few ways to check:
Data type: Look at the data type of the raster values. If the data type is integer (e.g., Int16, UInt8), then the precipitation raster is likely an integer raster. If the data type is floating-point (e.g., Float32, Float64), then it is a floating-point raster.
NoData values: Check if the raster has any NoData values. If there are NoData values specified, they are typically represented by a specific value such as -9999. If the raster has NoData values, it is more likely to be a floating-point raster since it allows for greater precision and flexibility in representing missing or invalid data.
Statistical summary: Calculate the statistical summary of the raster values, such as minimum, maximum, mean, and standard deviation. If the statistical summary includes decimal values (e.g., mean = 3.245), it indicates that the raster is a floating-point raster.
By examining these properties or metadata of the precipitation raster, you can determine whether it is an integer or a floating-point raster.
Know more about precipitation raster here:
https://brainly.com/question/28251771
#SPJ11
Will give brainliest and 100 points if question is correct.
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Key: 2 | 1 | 0 means 12 for Riverside and 10 for South Lake
Part A: Calculate the measures of center. Show all work. (5 points)
Part B: Calculate the measures of variability. Show all work. (5 points)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning.
A. The measures of center;
Riverside School; Mean 17.1 Median 16 and mode 20
South Lake School; Mean 19.5 Media 18 Mode 16, 25
B. The Measures of Variability;
Riverside School; Range, 37 Variance, 78.9 and Standard deviation 8.88
South Lake School; Range, 31 Variance, 80.12 and Standard deviation, 8. 95
C. Riverside school is the better choice if you're looking for a smaller class size because they have a small mean and median. They also have a smaller standard deviation.
How do we calculate measure of center for each school?A. The measures of center typically include the mean which is the average, median which is the middle value, and mode which is the most frequent value.
Riverside School: 5, 6, 9, 10, 12, 14, 15, 16, 17, 20, 20, 22, 23, 25, 42
Mean = 5 + 6 + 9 + 10 + 12 + 14 + 15 + 16 + 17 + 20 + 20 + 22 + 23 + 25 + 42
= 256/15 = 17.1
Median = 16
Mode = 20
South Lake School: 5, 8, 10, 11, 12, 16, 16, 18, 25, 25, 26, 27, 28, 30, 36
Mean = 5+8+10+11+12+16+16+18+25+25+26+27+28+30+36 = 293/15 = 19.5
Median = 18
Mode = 16, 25
B. The Measures of Variability include the range, Variance and Standard deviation .
Riverside School 5, 6, 9, 10, 12, 14, 15, 16, 17, 20, 20, 22, 23, 25, 42
Range = 42 - 5 = 37
Variance = (5-17.1)² + (6-17.1)² + (9-17.1)² + (10-17.1)² + (12-17.1)² + (14-17.1)²+ (15-17.1)² + (16-17.1)²+ (17-17.1)² + (20-17.1)²+ (20-17.1)² + (22-17.1)²+ (23-17.1)² + (25-17.1)²+ (42-17.1)² = 1184.95/15 = 78.9
Standard deviation = √78.9 = 8.88
South Lake School: 5, 8, 10, 11, 12, 16, 16, 18, 25, 25, 26, 27, 28, 30, 36
Range: 36 - 5 = 31
Variance : (5-19.5)² + (8-19.5)² + (10-19.5)² + (11-19.5)² + (12-19.5)² + (16-19.5)²+ (16-19.5)² + (18-19.5)²+ (25-19.5)² + (25-19.5)²+ (26-19.5)² + (27-19.5)²+ (28-19.5)² + (30-19.5)² + (36-19.5)² = 1201.75/15 = 80.12
Standard deviation: √80.12 = 8.95
Find more exercises on measures of center ;
https://brainly.com/question/14392478?
#SPJ1
-1 minus -3
my brain is dead rn, I dont even remember subtracting negative numbers
Answer:
No problem, I can help you with that!
When you subtract a negative number from another negative number, it's like adding two positive numbers. In this case, -1 minus -3 is the same as -1 + 3, which equals 2.
So, -1 minus -3 is equal to 2.
pls brainliest
let pq be a focal chord of the parabola 2 x py 4 . show that the circle with diameter pq is tangent to the directrix of the parabola
The circle with diameter pq of the parabola 2xp=y^2 is tangent to its directrix.
Let the coordinates of the foci of the parabola be (0, p) and (0, -p). Let pq be a focal chord passing through the point (a, pa^2/2p), where a is the x-coordinate of the point of intersection of pq with the axis of the parabola. The equation of pq is y = px/ap + pa^2/2p.
The midpoint of pq is (a, 0), and the radius of the circle with diameter pq is pq/2 = p√(1+a^2/p^2)/2. The distance from the center of the circle to the directrix of the parabola is p, which is equal to the radius of the circle. Therefore, the circle with diameter pq is tangent to the directrix of the parabola.
For more questions like Distance click the link below:
https://brainly.com/question/15172156
#SPJ11
) What is the area of the rectangle? 3 1/4 yd. 3 1/3 yd.
Answer:
Step-by-step explanation:
The Area of any Rectangle is
AREA = ( Length ) x ( Width )
For this one,
Area = ( 3 1/4 yard) x ( 3 1/3 yard)
= (13/4 x 10/3) yard²
= 65/6 yard² .
= ( 10 5/6 yard² ).
select any five points on a square whose side-length is one unit. show that at least two of these points are within √2 2 units of each other.
The distance between them is at most the diagonal of the smaller square, which is √2/2 units. The two points selected are within √2/2 units of each other, as required.
To show that at least two of the five points on a unit square are within √2/2 units of each other, we can use the pigeonhole principle.
Divide the square into four smaller squares, each with a side length of 1/2 unit. By the pigeonhole principle, at least two of the five points must lie in the same smaller square.
Consider the two points that lie in the same smaller square.
The distance between them is at most the diagonal of the smaller square, which is √2/2 units.
Therefore, these two points are within √2/2 units of each other, as required.
This argument holds for any five points in a unit square, since we can always divide the square into four smaller squares of side length 1/2 unit.
To know more about pigeonhole principle refer here :
https://brainly.com/question/31687163#
#SPJ11
Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places. ∫ 0
96
sin x
dx,n=4
The approximate value of the integral as 1.0026.
Using the Midpoint Rule with n = 4 to approximate the integral ∫0^π/2 sin(x) dx, we can find the width of each subinterval:
Δx = (π/2 - 0)/4 = π/8
Then, we can find the midpoints of each subinterval:
x1 = Δx/2 = π/16
x2 = 3Δx/2 = 3π/16
x3 = 5Δx/2 = 5π/16
x4 = 7Δx/2 = 7π/16
Using these values, we can evaluate the function at the midpoints and sum up the products with the width of each subinterval:
∫0^π/2 sin(x) dx ≈ Δx * [sin(x1) + sin(x2) + sin(x3) + sin(x4)]
≈ π/8 * [sin(π/16) + sin(3π/16) + sin(5π/16) + sin(7π/16)]
≈ 1.0026
Rounding the answer to four decimal places, we get the approximate value of the integral as 1.0026.
Learn more about integral here
https://brainly.com/question/30094386
#SPJ11
A stack of four cards contains two red cards and two black cards. I select two cards, one at a time, and do NOT replace the first card selected before selecting the second card. Let A be the event that the first card selected is red, and B be the event that the second card selected is red. The events A and B are: a. dependent b. disjoint c. complements d. independent
Let A be the event that the first card selected is red, and B be the event that the second card selected is red. The events A and B are dependent.
In this scenario, the outcome of the first card selection (event A) affects the probability of the second card being red (event B). If the first card selected is red, then there is one less red card remaining in the stack for the second card selection, which changes the probability of selecting a red card.
Know more about probability here:
https://brainly.com/question/32004014
#SPJ11
what is the equation of the line passes through the point (-2,-1) and has a slope of -5/2
An equation of the line passes through the point (-2, -1) and has a slope of -5/2 is y = -5x/2 - 6.
How to determine an equation of this line?In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical equation (formula):
y - y₁ = m(x - x₁)
Where:
x and y represent the data points.m represent the slope.At data point (-2, -1) and a slope of -5/2, a linear equation for this line can be calculated by using the point-slope form as follows:
y - y₁ = m(x - x₁)
y - (-1) = -5/2(x - (-2))
y + 1 = -5/2(x + 2)
y = -5x/2 - 5 - 1
y = -5x/2 - 6
Read more on point-slope here: brainly.com/question/24907633
#SPJ1
You want to get a pet but don't have a lot of money. You decide to compare the average yearly cost of owning a dog to the average yearly cost of owning a cat by assuming they have equal variance. You go to the dog park one Saturday and ask 46 dog owners how much per year they spend on their dog. The next Saturday you start next door and go to every house on your street until you collect a sample of 32 cat owners and ask them how much per year they spend on their cat. Your data for dogs is Xdog = $1,106, Sdog = $150. Your data for cats is Xcat = $971, Scat = $187. Find a 92% confidence interval for the average difference between owning a dog and a cat. Round to 2 decimals 64.40247 X 205.5975 X)
The 92% confidence interval for the average difference between owning a dog and a cat is $64.40 to $205.60.
To find the confidence interval for the difference in means, we need to use a two-sample t-test. Using the given information, we can calculate the standard error of the difference in means as:
SE = sqrt[(Sdog^2/n1) + (Scat^2/n2)]
= sqrt[(150^2/46) + (187^2/32)]
= 34.33
Next, we can calculate the t-value for a 92% confidence interval with degrees of freedom equal to the smaller sample size minus one (df = 31):
t = t_(0.04/2, 31) = ± 1.998
Finally, we can calculate the confidence interval for the difference in means as:
(Xdog - Xcat) ± (t * SE)
= (1106 - 971) ± (1.998 * 34.33)
= $64.40 to $205.60
You can learn more about confidence interval at
https://brainly.com/question/15712887
#SPJ11
8. write 120 in the even form using the definition of even and odd numbers.
120 is an even number because it is divisible by 2 without leaving a remainder. We can represent an even number as twice an integer. Therefore, 120 can be expressed as 2 times 60, where 60 is an integer. Thus, we can write 120 in the even form as 2n, where n = 60.
In general, even numbers are integers that can be expressed as 2n, where n is any integer. An integer is even if it is divisible by 2 without leaving a remainder. For example, 4, 10, and 28 are even numbers because they can be expressed as 2n, where n is 2, 5, and 14, respectively. In contrast, odd numbers are integers that cannot be expressed as 2n, where n is any integer. Odd numbers leave a remainder of 1 when divided by 2. For example, 3, 9, and 27 are odd numbers because they cannot be expressed as 2n, where n is any integer.
To learn more about integer click here : brainly.com/question/28000270
#SPJ11
Sarah flips a coin 6 times and gets heads every time. Based on this she can say that the coin is
A) Fair
B) Not enough trials to determine its fairness
C) No Fair
Please choose the correct answer and explain
To determine if the coin is truly unfair or biased, more trials are needed to get a larger sample size and calculate the probability of getting heads or tails.
based on the given scenario, sarah flips a coin 6 times and gets heads every time. however, it is not sufficient to conclude that the coin is unfair or biased, which rules out options (a) and (c). the correct answer is (b) "not enough trials to determine its fairness."
to determine the fairness of a coin, a larger sample size is needed to ensure statistical significance. the probability of getting heads or tails on a fair coin is 50%, which means that the likelihood of getting heads six times in a row is (0.5)⁶ = 0.0156, or about 1.56%. although this is a relatively low probability, it is still possible to get heads six times in a row with a fair coin. with a larger sample size, it would be possible to conduct statistical tests such as a chi-square analysis to determine if the coin is fair or biased.
in summary, the fact that sarah got heads six times in a row is not enough to determine the fairness or bias of the coin, and more trials are needed to ensure statistical significance.
Learn more about probability here:
https://brainly.com/question/32117953
#SPJ11
For all nonzero real numbers p,t,x, and y such that (x)/(y)=(3p)/(2t) which of the following expressions is equivalent to t ?
The expression equivalent to t is:t = (3p * y)/(2x)
To find the expression equivalent to t, we can manipulate the given equation:
(x)/(y) = (3p)/(2t)
Cross-multiplying, we get:
2t * (x) = (3p) * (y)
Dividing both sides by 2(x), we have:
t = (3p * y)/(2x)
Know more about expression here:
https://brainly.com/question/14083225
#SPJ11
Find the P-value for the following values of the test statistic, sample size, and alternate hypothesis H1. t = 1.212, n = 6, H : μ > μ₀
group of answer choices p-value is 0.1131 p-value is between 0.10 and 0.25 p-value is between 0.05 and 0.10 p-value is 0.8869
The P-value in this case is approximately 0.1131.
In the given problem, we are given a test statistic t = 1.212, a sample size n = 6, and an alternative hypothesis H1: μ > μ0.
To calculate the P-value, we need to find the area to the right of the test statistic t in the t-distribution with n - 1 degree of freedom (df), assuming the null hypothesis is true.
Using a t-table or calculator, we can find that the area to the right of t = 1.212 with 5 degrees of freedom is approximately 0.1131. This means that if the null hypothesis were true (i.e., if the population mean were equal to the hypothesized value μ0), we would expect to observe a test statistic as extreme as t = 1.212 or more extreme in about 11.31% of random samples of size 6.
Since the P-value is the probability of observing a test statistic as extreme or more extreme than the one calculated from the sample data, assuming that the null hypothesis is true, we can conclude that the P-value in this case is approximately 0.1131.
To learn more about the hypothesis;
brainly.com/question/29519577
#SPJ1
HELPPPPP
During lockdown Dr. Jack reckoned that the number of people getting sick in his town was decreasing 40% every week.
If 3000 people were sick in the first week and 1800 people in the second week (3000x0.60=1800) then how many people would have become sick in total over an indefinite period of time?
Over an indefinite period of time, the total number of people who would have become sick is the sum of the number of sick people for each week, which approaches but never reaches zero.
To determine the total number of people who would have become sick over an indefinite period of time, we can use the given information that the number of people getting sick is decreasing by 40% every week.
Let's break it down week by week:
Week 1: 3000 people were sick.
Week 2: The number of sick people decreased by 40%, which is 3000 * 0.40 = 1200 fewer people, resulting in 3000 - 1200 = 1800 people being sick.
We can observe that each week, the number of sick people decreases by 40% compared to the previous week. This means that each week, we multiply the previous week's number of sick people by 0.60 (100% - 40% = 60% or 0.60).
Therefore, we can continue this pattern to find the number of sick people for subsequent weeks:
Week 3: 1800 * 0.60 = 1080 people sick.
Week 4: 1080 * 0.60 = 648 people sick.
Week 5: 648 * 0.60 = 388.8 (rounded to 389) people sick.
And so on.
As we continue this pattern, the number of sick people will approach zero, but it will never reach zero due to the continuous decrease of 40% each week.
For more such questions on sum
https://brainly.com/question/24205483
#SPJ8
given a sample of size of 36 how large does the population standard deviation have to be in order for the standard error to be
If you provide the desired standard error value, I can help you calculate the corresponding population standard deviation.
The standard error is a measure of the variability or uncertainty of a sample mean. It is calculated by dividing the population standard deviation by the square root of the sample size. Therefore, if we want the standard error to be smaller, the population standard deviation should be larger.
To determine how large the population standard deviation needs to be, we need to specify a desired standard error value. Without that information, it is not possible to provide a specific answer. The relationship between the population standard deviation and the standard error is inversely proportional, so as the population standard deviation increases, the standard error decreases.
Know more about standard deviation here:
https://brainly.com/question/23907081
#SPJ11
The water level of certain body of water is changing at a rate of W(t) = 1/2cos(3 - t/2) inches per hour; where represents hours since 12ampart c: use your calculator to evaluate your integral from part b. explain the meaning of the answer in terms of the context. (3 points)
Since we don't have the function or limits of integration mentioned in part b of the question, we cannot evaluate the integral.
However, we can explain the meaning of the answer once we have the integral.
Assuming the integral represents the change in water level over a certain time interval, the answer to the integral would give us the total change in water level over that time interval. In other words, it would give us the net increase or decrease in the water level during that time period.
Since the rate of change of water level is given in inches per hour, the answer to the integral would also be in inches.
We can use this information to determine how much the water level has changed and whether it has increased or decreased during the given time interval.
To know more about function or limits of integration, refer here:
https://brainly.com/question/31956165
#SPJ11
can (5x)³ be written as 5x³?
Answer:
NO
Step-by-step explanation:
b/c when u say (5x)³ u will multiple 5x 3 times by itself . but when we say 5x³ you will multiple x 3 time . so they are d/t and you can't write 5x³ instade of (5x)³ .
Let r = 5.6 cm. Express your answer to two significant figures and include the appropriate units. What is the direction of the electric field at the position ...
Assuming that the position mentioned in the question is not specified, I cannot provide a specific answer for the direction of the electric field. However, I can explain the significance of the given value of r = 5.6 cm and how to express it to two significant figures.
The value of r is the distance from the electric charge or charges generating the electric field to the position where the field is being measured. It is given in centimeters (cm), which is a unit of length in the metric system. To express the value of r to two significant figures, we look at the first two digits after the decimal point, which are 5 and 6. The third digit, which is 0, is ignored because it is less than 5. Therefore, the value of r to two significant figures is 5.6 cm.
In order to determine the direction of the electric field, more information is needed such as the magnitude and location of the charge or charges creating the field and the location of the position where the field is being measured. Without this information, it is not possible to provide an answer for the direction of the electric field.
To know more about electric field visit:
https://brainly.com/question/8971780
#SPJ11
Marley drives to work every day and passes two independently operated traffic lights. The probability that both lights are red is 0. 35. The probability that the first light is red is 0. 48. What is the probability that the second light is red, given that the first light is red?
The probability that the second traffic light is red, given that the first light is red is approximately 0.729 or 72.9%.
To find the probability that the second light is red, given that the first light is red, we can use the concept of conditional probability. The conditional probability of an event B happening, given that event A has already occurred, is denoted as P(B|A).
In this scenario, event A represents the first traffic light being red, and event B represents the second traffic light being red. We are given that the probability of event A, P(A), is 0.48, and the probability of both events A and B occurring, P(A and B), is 0.35.
The formula to calculate conditional probability is:
P(B|A) = P(A and B) / P(A)
Plugging in the values we have, P(B|A) = 0.35 / 0.48.
Dividing 0.35 by 0.48, we find that the probability of the second traffic light being red, given that the first light is red, is approximately 0.729.
Therefore, the probability that the second light is red, given that the first light is red, is approximately 0.729 or 72.9%.
To learn more about probability click here, brainly.com/question/31828911
#SPJ11
find formula for sn = 4sn-2, s0=-1, s1=-14
This formula gives the correct values for the first few terms, and we can easily verify that it satisfies the given recursion formula.
To find a formula for the sequence, we can use recursion. From the given information, we have:
s0 = -1
s1 = -14
To find s2, we use the given formula:
s2 = 4s0 = 4(-1) = -4
To find s3, we use the formula again:
s3 = 4s1 = 4(-14) = -56
To find s4, we use the formula again:
s4 = 4s2 = 4(-4) = -16
We can continue this pattern to find each term in the sequence. However, we notice that the sequence alternates between -4 and -16 as we go from even to odd indices. Therefore, we can express the sequence using a piecewise formula:
sn =
-1 if n = 0
-14 if n = 1
-4 if n is even and greater than 0
-16 if n is odd and greater than 1
To know more about recursion formula refer here
https://brainly.com/question/8972906#
#SPJ11
Whats the usefulness of a
road map that has no scale?
I know it’s not math but they didn’t have a science subject this is for 7th grade science
A road map without scale is useful for providing general directions and landmarks but may not be reliable for accurate distance measurements.
Can a road map without a scale be useful?A road map without scale is good purpose for individuals who are seeking general directions or landmarks. For example, if we want to take road trip and need to know which highways to take, the map without a scale is sufficient for their needs.
But, lack of scale means the map cannot provide accurate distance measurements which will make it difficult for someone who needs to know exactly how far they need to travel. The absence of scale also make it challenging to navigate in unfamiliar areas because it is hard to determine the distance between two points.
Read more about road map
brainly.com/question/24735309
#SPJ1
Determine the range of the function g(x)= 5x^2-2x+1. Enter your answer in interval notation. This is a parabola that turns upward.
The parabola opens upward, the range of the function is [6/5, ∞) in interval notation.
We can find the range of the function by finding the vertex of the parabola, which will give us the minimum value, and then noting that the function increases without bound as x approaches infinity.
First, we need to find the vertex of the parabola. We can do this by finding the x-coordinate of the vertex, which is given by:
x = -b/2a
where a = 5, b = -2. Substituting these values, we get:
x = -(-2)/(2(5)) = 2/5
To find the y-coordinate of the vertex, we can substitute this value of x into the equation for g(x):
g(2/5) = 5(2/5)^2 - 2(2/5) + 1 = 5/5 - 4/5 + 1 = 6/5
So the vertex of the parabola is (2/5, 6/5), which is the minimum value of the function.
Since the parabola opens upward, the range of the function is [6/5, ∞) in interval notation.
To learn more about parabola
https://brainly.com/question/22753188
#SPJ11
