What is a formula for the nth term of the given sequence?
80, 100, 125

Answers

Answer 1

[tex]a_n=80\left(\frac{5}{4}\right)^{n-1}[/tex]is the formula for the nth term of the given sequence.

What is sequence?

In mathematics, a sequence is a list of components, usually numbers, where the components' order is important.

Here, everything fits into a predetermined pattern. In real life, we encounter sequences frequently.

Sequences include things like house numbers in a row, income increases over time (by a set dollar amount or percentage), book pages, etc.

A list of numbers (or other components) that follow a specific pattern is called a sequence.

Olivia, for instance, has been given a job with a starting monthly pay of $1,000 and a $500 annual raise.

Are you able to determine her monthly pay for the first three years? $1000, $1500, and $2000 will be the amounts.

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Related Questions

A tower that is 107 feet tall casts a shadow 112 feet long. Find the angle of elevation of the sun to the nearest degree.

Answers

Draw the picture.

You have a right triangle with height = 107 and base = 131

-----

angle = tan^-1(107/131) = 39.24 degrees

==============================

I will give brainiest!

Answers

Answer:

its the thrid one i think i might be wrong srry

Step-by-step explanation:

Answer:

20/53

Answer number 4

Step-by-step explanation:

There are 20 brown, 16 orange, 4 navy, and 13 purple marbles. A marble is drawn at random. What is the probability the marble is brown?

Let's first add the marbles together.

20+16+4+13=53

there are 53 marbles altogether.

20 of the marbles are brown.

So the probability of drawing a brown marble is 20/53

PLEASE GIVE BRAINLIEST

4. Instead of finding even or odd consecutive integers we could also look for integers that differ by a number other then 2. Find three numbers that each differ by 3 such that 5 times the largest integer is equal to three
times the smallest increased by 5 times the middle.

Answers

The smallest number is 5, middle number is 8 and largest number is 11.

What is Algebra?

A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.

Variables are the name given to these symbols because they lack set values.

In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.

Given:

let x be the smallest number.

let x + 3 be the middle number.

let x + 6 be the largest number.

Then, the equation is

5 (x + 6) = 3 x + 5 (x + 3)

5x+ 30 = 3x+ 5x + 15

3x = 30- 15

3x= 15

x= 5

So, the numbers are x = 5, x + 3 = 8, and x + 6 = 11.

Now, the difference between each succeeding number is 3.

5 x 11 = 55

3 x5 + 5 x 8 = 15 + 40 = 55

Hence, the smallest number is 5, middle number is 8 and largest number is 11.

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Solve for x by writing the equation in exponential form.

log₁₆ x=-1/2

Answers

The solution for x in the given logarithmic equation, log₁₆x = -1/2, is x = 1/4

Solving logarithmic equations

From the question, we are to solve the given equation for x.

The given equation is

log₁₆x = -1/2

To solve the equation, we will determine the value of x.

Solving the equation

log₁₆x = -1/2

From one of the laws of logarithm,

logₐy = n ⇒ y = aⁿ

Thus,

The equation becomes

x = 16^(-1/2)

By applying one of the laws of indices, we get

x = (√16)⁻¹

x = 4⁻¹

x = 1/4

Hence, the value of x is x =1/4

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Write write 69200000 in scientific notation

Answers

The scientific notation of 69200000 is  6.92 × 10⁷

How to represent number in scientific notation?

Scientific notation is a form of presenting very large numbers or very small numbers in a simpler form.

Scientific Notation is a special way of writing numbers:

For example 800 is written as 8 × 10² in Scientific Notation.

Therefore, let's write the scientific notation of the number 69200000.

Hence,

69, 200, 000 = 6.92 × 10⁷

The logic is that we will count backwards until we meet the last number.

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Please help me solve this, it’s the last question.

Answers

The value of the double integration is 7776 after solving and integration. the answer is 7776.

What is integration?

It is defined as the mathematical calculation by which we can sum up all the smaller parts into a unit.

It is given that:

Double integration (x + y) dA

y = x²

y² = 216x

y = √216 √x

∫∫(√216 √x +  x²)

After solving:

[tex]\rm \int _0^{36}\int _0^6\:\left(\sqrt{216}\:\sqrt{x}\:+\:\:x²\right)dxdy[/tex]

=7776

Thus, the value of the double integration is 7776 after solving and integration. the answer is 7776.

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A fraction is such that if the numerator is multiplied by 3 and denominator is reduced by 2, we get 3/5 but if the numerator is increase by 4 and the denominator is double we get 5/14. find the fraction

Answers

The fraction of the given is 1/7 .

What is fraction?

 A fraction that is stated mathematically as a quotient, where the numerator and denominator are divided. Both are integers in a simple fraction. A fraction appears in the numerator or denominator of a complex fraction. The numerator of a proper fraction is less than the denominator.

Here let us take x as numerator and y as denominator. Then

If the numerator is multiplied by 3 and denominator is reduced by 2, we get 3/5 ,

=> 3x/y-2 = 3/5

=> 5*3x =3(y-2)

=> 15x=3y-6

=> 5x=y-2

=> y =5x+2------>1

Now if the numerator is increase by 4 and the denominator is double we get 5/14,

=> (x+4)/2y = 5/14

=> 14x+56 = 10y

=> 7x+28=5y ---->2

Here put 1 into 2 then,

=> 7x+28 = 5(5x+2)

=> 7x+28=25x+10

=>18x=18

=> x =1

Now put x=1 into 1 then,

=> y =5(1)+2 = 7.

Therefore the given fraction is x/ y = 1/7.

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The remainder is what’s left when you divide. The part you cannot divide.
You can divide 75 by 3 = 25, so the remainder is 1.

Answers

The dividend with a divisor of 3 that will yeild the quotient 25 with a remainder of 1 is 76.

Dividing a fraction

In division of fractions, we have the divisor which is the denominator, the dividend which is the numerator and then the quotient which is the whole number as the result and sometimes the remainder when the divisor does not divide the dividend exactly.

For us to have a quotient of 25 and a remainder of 1, with the divisor as 3, then the dividend is 76.

Therefore, 76 divided by 3 is equal to 25 with a remainder of 1.

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When a new cellphone is put on the market, the demand each month can be described by the function C(t)= -√t^2+4t-12 +3, where C (t)
represents the demand of the cellphone (measured in millions of people) and the time, t, is measured in months. Which of the following
solution(s) are valid for a positive demand?
O a
Ob
Oc
Od
(7,0) and (3, 0)
(-6, 3) and (2, 3)
(6,3)
(2,3)

Answers

The demand is positive for t greater than 3. The correct answer is option (a).

What is linear inequality?

Linear inequality refers to the relation between a linear algebraic expression to some known value that contains inequality sign.

Unlike a linear equation it can have a range of values inside an interval.

Given that,

The demand function for cell phone is given as,

C(t) = -√t^2 + 4t - 12 + 3

Which can be written in simple terms as,

C(t) = -t + 4t - 12 + 3

       = 3t - 9

For positive demand C(t) ≥ 0

=> 3t - 9 ≥ 0

=> t ≥ 3

Which is valid for option (a) only.

Hence, the demand is positive for t ≥ 3.

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Hi! The answer would be (6,3)

Have a good day!

A steel beam can be cut to different lengths for a project. Assuming the weight of a steel beam is proportional to
its length, what information would you need to know to write an equation that represents this relationship?

Answers

The equation the given statement is y=ax.

What is equation?

  The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. Equations come in two varieties: identities and conditional . All possible values of the variables result in an identity. Only certain combinations of the variables' values make a conditional equation true. Two expressions joined by the equals symbol ("=") form an equation.

Here the weight of the steel beam is proportional to length.

let y be weight and x be length of it. Then

=> y ∝ x

=> y=ax

where a is the constant

we can find it if we have two sets of values of y and x.

Therefore the equation the given is y=ax.

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more than 3.2% of homes have only a landline telephone and no wireless phone. sample data: A survey by the national center for health statistics showed that among 15800 homes 5.81% had landline phones without wireless phones. Complete parts a and b . Express the originall claim in symbolic form. Let the parameter represent a value with respect to homes that have only a landscape telephone and no wireless phone

Answers

a) The original claim expressed in symbolic form is; p > 0.032

b) The hypotheses are defined as;

Null hypothesis; H₀: p ≤ 0.032

Alternative hypothesis; Hₐ: p > 0.032

How to define the hypotheses?

A hypothesis is defined as an educated guess while using reasonable thinking, about the answer to a scientific question.

a) We are told that the claim is that more than 3.2% (0.032) of homes have only a landline telephone and no wireless phone. Thus, the original claim in symbolic form is; p > 0.032

b) From the sample survey that we see, it is clear that among 15800 homes, 5.81% had landline phones without wireless phones. This would be the sample proportion.

This means that we can define the alternative hypothesis as;

Hₐ: p > 0.032

Null hypothesis is;

H₀: p ≤ 0.032

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If the point A(p−8,4p+5) lies on the line passing through the points M(−2,−5) and N(1,−10), what is the value of p?

Answers

The value of p is 0.

What is equation of line?

A line's equation is an algebraic way of expressing the collection of points that make up a line in a coordinate system.

Given that

Point A(p8,4p+5) is located on a line that connects M(-2,-5) and N(1,-10).

The equation of line that passing through points  M and N,

Use the formula of equation of line,

y-y₁ = (y₂-y₁/x₂-x₁)(x-x₁)

y-(-5) = (-10+5/1+2)(x-(-2))

⇒ y+5 = -5/3(x+2)

⇒5x+3y +25 = 0    (1)

Since, line passes through point  A(p−8,4p+5), so this point A will satisfy the equation (1)

5(p-8)+3(4p+5)+25 = 0

⇒ 17p = 0

⇒ p = 0

The value of p is 0.

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PLease help me i willlllllllllll faillllllllllllllif someone dont!!!!!!

Answers

Answer:

B- function 1, because it’s rate of change is 2

Step-by-step explanation:

the rate of change of function 2 can be found since it is in slope intercept form

y=mx+b and m is slope and in this case m is 1/2

1/2 is function 2 rate of change

To find function 1 rate of change we use y2-y1/x2-1

using (1,2) and (-1,-2)

-2-2/-1-1

-4/-2

2 is the slope of function 1

Function 1 has a greater rate of change so  B is correct

Hopes this helps please mark brainliest

Substitute the given values into the given formula and solve for the unknown variable. If​ necessary, round to one decimal place.

I=PRT​; I=1920​, P=24,000​, R=0.04 ​(Simple interest​ formula)

T=

Answers

The unknown variable T has a value of T = 2

How to determine the unknown variable?

From the question, we have the following parameters that can be used in our computation:

Formula; I = PRT

The above formula is a simple interest formula, where

I = Simple InterestP = PrincipalR = RateT = Time

Values:

I=1920​, P=24,000​, R=0.04

Substitute I=1920​, P=24,000​, R=0.04 in the equation I = PRT

So, we have

1920 = 24000 * 0.04 * T

Evaluate the products

1920 = 960 * T

So, we have

T = 1920/960

Evaluate

T = 2

Hence, the value is 2


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A Chevrolet Sonic Hatchback costs $14,800.00. With a 12 %​ down payment, you can have an amortized loan for 6 years at a rate of 4.5%​. What will the monthly payment be? car cost in total, money paid in interest

Answers

The monthly payment on the amortized loan is $206.74. The car cost in total is $14, 885. 52. The money paid in interest is $1, 861.52.

How to find the monthly payment?

The monthly payment is called an annuity because it is constant and remains the same.

Use the present value of an annuity to find the monthly payment to be:

Loan amount = Monthly payment x Present value interest factor of annuity, period, rate

The period is:
= 6 years x 12

= 72 months

The rate is:

= 4.5% / 12 months a year

= 0.375%

The loan amount is:

= 14, 800 x ( 1 - downpayment)

= 14, 800 x ( 1 - 12%)

= $13, 024

The monthly payment is:

13, 024 = Monthly payment x Present value interest factor of annuity, 72 periods , 0.375%

Monthly payment = 13, 024 / 62.995976235992

= $206.74

The car cost in total is:

= Monthly payment x Number of months

= 206. 74 x 72

= $14, 885. 52

The money paid in interest is:

= Loan amount - Car cost

= 14, 885.52 - 13, 024

= $1, 861.52

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There were 100 random samples of the same size taken from a population which is known to have a normal distribution with some mean and a known standard deviation. A 95% confidence interval for the population mean was constructed for each of the 100 random samples. If all the conditions are satisfied, what percentage of these confidence intervals would capture the true population mean? Choose the correct answer below.
A. 100% of them
B. At least 50% but no more than 75% of them
C. Approximately 95% of them
D. This cannot be determined without knowing the population mean.

Answers

The percentage of confidence intervals that would capture the true population means is approximately 95% of them. which is the correct answer would be option (C).

There were 100 random samples of the same size drawn from a population known to have a normal distribution with a mean and a standard deviation.

For each of the 100 random samples, a 95% confidence interval for the population mean was created.

Since all the conditions are satisfied,

Therefore, the percentage of confidence intervals that would capture the true population means is approximately 95% of them.

Hence, the correct answer would be an option (C).

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help pls ,The problem 7,291 ÷ 19 is solved below using partial quotients. Identify what partial quotient was used in each step. Then, identify your final quotient.

Answers

Answer:

383.7

Step-by-step explanation:


In one small school with 97 students, a questionnaire about favorite flavors of ice cream was done,
and here are the results: 25 students like chocolate and vanilla flavor students like vanilla and
strawberry flavor 17 students like chocolate and strawberry flavor 9 students like all three flavors 5
students do not like ice cream.
How many students like only vanilla flavor if the number is equal to the number of students who
like only strawberry flavor and that number is two times less than the number of students who like
only chocolate flavor?

Answers

Only 46 students like vanilla ice cream.

What is union and interaction?

Union of Disjoint Sets:

If A and B are two finite sets and if A ∩ B = ∅, then

n(A ∪ B) = n(A) + n(B)

In simple words if A and B are finite sets and these sets are disjoint then the cardinal number of Union of sets A and B is equal to the sum of the cardinal number of set A and set B.

Given,

total number of students = 97

students who like chocolate and vanilla flavors = 25

students who like strawberry and vanilla flavors  = 16

students who like chocolate and strawberry flavors = 17

students who like all three flavors = 9

students who do not like ice cream = 5

Let C,S,V represent the chocolate, strawberry, vanila

therefore,

n(C∪S∪V) = n(C) + n(S) + n(V) - n(C∩V) - n(V∩S) - n(C∩S) + n(C∩V∩S)

97 = n(C)+n(S)+n(S)-25-27-9-5

141 = n(C) +2n(S)

141 = 3n(C)

n(C)=48

n(S) = n(V) =n(C)-2

=46

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Val's whole-house central air conditioner uses 2,500 watts when running. Val runs the AC 5 hours per summer day. Electricity costs (12 cents)/(1 kilowatt-hour). How much does Val's AC cost to run for a summer month of 30 days?

Answers

The total cost to run Val’s AC costs for a summer month of 30 days will be $67.5.

What is the unitary method?

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

Quantity of electricity used in kilowatts is;

1000 watts = 1 kilowatts

2,500 watts = 2.5 kilowatts

Given that Number of hours Val runs AC per day = 5 hours

Number of days = 30 days

Cost of electricity = $0.18 kilowatts per hour

The Cost of Val’s AC to run for a summer month of 30 days can be calculated as;

= Quantity of electricity used × Number of hours Val runs AC per day × Number of days × Cost of electricity

= 2.5 × 5 × 30 × 0.18

= $67.5

The total cost to run Val’s AC costs for a summer month of 30 days will be $67.5.

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pls help me thank you

Answers

The probability that a student chosen at random is in the choir or band or both is 0.911

What is probability?

Probability is the likelihood that an event will happen. This can range from an event being impossible to some likelihood to being absolutely certain. In mathematics terms, probability is on a scale from 0 to 1. Zero means the event is impossible, like rolling a seven on a die that only has digits from 1 to 6. One is an event that will happen, it is certain.

Total number of students in the school = 450

number of students in choir = 110

number of students in band = 240

number of students in both = 60

Probability a student chosen at random is in the choir or band or both is

110/450 + 60/450 + 240/450

= 410/450 which is 0.911

In conclusion, the probability of a student being in music, or band or both is 0.911

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CAN SOMEONE HELP WITH THIS QUESTION?✨

Answers

Answer:

x = 148.76

Step-by-step explanation:

tan (37) = 81/x

x = 81/(tan (37)) = measure of "x" from after the height is 81

tan (63) = 81/x

x = 81/(tan (63)) = measurement of "x" from before the height is 81

81/(tan (63)) + 81/(tan (37)) = x

x = 148.76

use implicit differentiation to find y" in terms of y and y.

Answers

The solution for implicit differentiation is

[tex]\frac{d^{2}y }{dx^{2} } =-\frac{16}{25y^{3} }[/tex]

What is implicit differentiation?

In mathematics, differentiation is the process of determining the derivative, or rate of change, of a function. Differentiation is a technique for determining a function's derivative. Differentiation is a mathematical procedure that determines the instantaneous rate of change of a function based on one of its variables. The process of finding the derivative of dependent variable in an implicit function by differentiating each term separately

Given data ,

Let the function be [tex]4x^{2} -5y^{2} =4[/tex]   be equation (1)

Now , on differentiating the terms with respect to y , we get

[tex]4x^{2} -5y^{2} =4[/tex]

[tex]8x-10y\frac{dy}{dx} = 0[/tex]

[tex]8x=10y\frac{dy}{dx}[/tex]

[tex]\frac{dy}{dx}=\frac{4}{5} \frac{x}{y}[/tex]   be equation (2)

So , the first derivative is [tex]\frac{dy}{dx}=\frac{4}{5} \frac{x}{y}[/tex]

Now , on taking the derivative of equation (2) , we get

[tex]\frac{d^{2} y}{dx^{2} } =\frac{4}{5}(\frac{y-x\frac{dy}{dx} }{y^{2} } )[/tex]

Substituting the value for dy/dx from equation (1) , we get

[tex]\frac{d^{2} y}{dx^{2} } =\frac{4}{5}(\frac{y-x\frac{4}{5}\frac{x}{y} }{y^{2} } )[/tex]

On simplifying the equation , we get

[tex]\frac{d^{2} y}{dx^{2} } =\frac{4}{5} ( \frac{5y^{2}-4x^{2} }{5y^{3} } )[/tex]    be equation (3)

Substituting the value for 5y² - 4x² = -4 from equation (1) we get

[tex]\frac{d^{2} y}{dx^{2} } =\frac{4}{5} ( \frac{-4 }{5y^{3} } )[/tex]

So , the implicit differentiation value is

[tex]\frac{d^{2} y}{dx^{2} } =\frac{-16}{25y^{3} }[/tex]

Hence , The solution for implicit differentiation is

[tex]\frac{d^{2}y }{dx^{2} } =-\frac{16}{25y^{3} }[/tex]

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1.
In Triangle QRS, A is the midpoint of QR, B is the midpoint of RS, and C is the
Rubric
midpoint of SQ
Also, Q.A = 10, BR = 15, and SQ = 28.
What is the perimeter of triangle ABC?
Use words, number, and/or pictures to show all of your work.

Answers

The perimeter of a triangle is 78 if QA=10. SQ=28, BR=15 and A is the midpoint of QR, B is the midpoint of RS, and C is the midpoint of SQ in triangle QRS.

What is meant by triangle?

In Euclidean geometry, any three non-collinear points define a unique triangle and, at the same time, a unique plane. In other words, the triangle is contained in just one plane, and every triangle is contained in at least one plane. There is just one plane and all triangles are enclosed in it if the entire geometry is merely the Euclidean plane; however, this is no longer true in higher-dimensional Euclidean spaces. Unless otherwise specified, this article is about triangles in Euclidean geometry, specifically the Euclidean plane.

Given,

In triangle QRS,  A is the midpoint of QR, B is the midpoint of RS, and C is the midpoint of SQ

Also given that,

QA=10

BR=15

SQ=28

QA=RA=10

BR=SB=15

Therefore, perimeter of the triangle=RQ+QS+RS

=(RA+QA)+(QS)+(RB+BS)

=(10+10)+(28)+(15+15)

=20+28+30

=78

Hence, the perimeter of a triangle=78

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In the function f(y)=25−3y, what is the independent variable?

Answers

y is independent. f(y) is dependent

At December 31, 2019, the records of Hoffman Company reflected the following balances in the shareholders’ equity accounts:


Common shares: par $14 per share; 51,000 shares outstanding
Preferred shares: 9 percent; par $10 per share; 7,650 shares outstanding
Retained earnings: $225,500


On January 1, 2020, the board of directors was considering the distribution of a $68,500 cash dividend. No dividends were paid during 2018 and 2019.

Required:
Determine the total and per-share amounts that would be paid to the common shareholders and to the preferred shareholders under two independent assumptions:

Answers

Answer:

a) Total preferred dividend = $37,020; total common stock dividend = $26,980.

b) Total preferred dividend = $12,340; total common stock dividend = $51,660.

C) see explanation section.

Explanation:

Requirement - A

If the preferred dividend is cumulative.

Common stock = $12 x 50,000 = $600,000

Preferred stock = $19.5 x 7,910 = $154,245

Given,

Retained Earnings = $240,000, and Dividend = $64,000.

Generally, cash dividend is distributed to the preferred and common stockholders. However, after paying the preferred stock, dividend is paid to the common stockholders.

Therefore, preferred dividend = $154,245 x 8% = $12,340 for 2019.

As the preferred dividend is cumulative, the preferred stockholders will get the dividend for 2017 and 2018 if there remains any extra dividend after giving for 2019.

For 2017 = $12,340

For 2018 = $12,340

For 2019 = $12,340

Total preferred dividend = $37,020.

Therefore, the total common stock dividend = $(64,000 - 37,020) = $26,980.

Requirement - B

If the preferred dividend is non-cumulative.

Therefore, preferred dividend = $154,245 x 8% = $12,340 for 2019.

As the preferred dividend is non-cumulative, the preferred stockholders will not get the dividend for 2017 and 2018 despite remaining extra dividend after providing for 2019.

Therefore, preferred dividend = $12,340

Common stock dividend = $(64,000 - 12,340) = $51,660.

Requirement - C

The common stock dividend is more in non-cumulative as the company does not pay the previous years' dividends to the preferred dividend. On the other hand, if the company pays the dividend for the last years', which is known as cumulative, the dividend will become less. Therefore, the common stockholders will get fewer dividends because of paying the previous years' dividend to the preferred stockholders.

The factors would cause a more favorable dividend for the common stockholders if preferred dividends were non-cumulative, not in arrears, and there is an increase of distribution of dividends.

Point slope of (-5, 1) and (3, 4)

Answers

Answer:

Slope is 3/8.  m = 4-1 / 3 - (-5) = 3/8

Step-by-step explanation:

The current of a river is 3 miles per hour. A boat travels to a point 8 miles upstream and back in 2 hours. What is the speed of the boat in still water?

Answers

Given:

The current of a river is 2 miles per hour. A boat travels to a point 8 miles upstream and back in 3 hours.

Required:

What is the speed of the boat in still water?

Explanation:

A boat has to travel 8 miles against the current and 8 miles with the current.

Ustream(against the current) the boat's speed is:

speed in still water - current OR x - 2.

Downstream( with the current) the speed is:

speed in still water + current speed OR x + 2.

We know the distance

OR

The total time is 3 hours

The time upstream + The time downstream = 3 hours

Assuming that the population is normally distributed, construct a
95% confidence interval estimate for the population mean for
each of the following samples:
Sample A: 1 1 1 1 8 8 8 8
Sample B: 1 2 3 4 5 6 7 8
Explain why these two samples produce different confidence
intervals even though they have the same mean and range

Answers

The two samples produce different confidence intervals because they have different standard deviation values.

How to illustrate the information?

Confidence interval for Population A

The confidence interval for Population mean is given as below:

Confidence interval = Xbar ± t*S/sqrt(n)

From the given data, we have

Xbar = 4.5

S = 3.741657387

n = 8

df = n – 1 = 7

Confidence level = 95%

Critical t value = 2.3646

(by using t-table)

Confidence interval = Xbar ± t*S/sqrt(n)

Confidence interval = 4.5 ± 2.3646*3.741657387/sqrt(8)

Confidence interval = 4.5 ± 3.1281

Lower limit = 4.5 - 3.1281 = 1.3719

Upper limit = 4.5 + 3.1281 = 7.6281

Confidence interval = (1.3719, 7.6281)

Confidence interval for Population B

Confidence interval for Population mean is given as below:

Confidence interval = Xbar ± t*S/sqrt(n)

From given data, we have

Xbar = 4.5

S = 2.449489743

n = 8

df = n – 1 = 7

Confidence level = 95%

Critical t value = 2.3646

(by using t-table)

Confidence interval = Xbar ± t*S/sqrt(n)

Confidence interval = 4.5 ± 2.3646*2.449489743/sqrt(8)

Confidence interval = 4.5 ± 2.0478

Lower limit = 4.5 - 2.0478 = 2.4522

Upper limit = 4.5 + 2.0478 = 6.5478

Confidence interval = (2.4522, 6.5478)

The above two samples produce different confidence intervals even though they have the same mean and range because they have different standard deviation values.

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Find the values of the ratios (red to blue) of the perimeter and areas of the similar figures
9 14 (QUICK)

Answers

the ratio of the perimeter is 14/9
the ratio of area is 196/81

Please help me solve

Answers

As per the given matrix A and B, the value of -7A - 6B is [tex]-7A - 6B = \begin{bmatrix} 40 & -106 &-32 \\ -46& 43 &25 \\82 & -62& -22 \end{bmatrix}[/tex]

Matrix:

Basically, a set of numbers arranged in rows and columns so as to form a rectangular array is known as matrix.

Given,

Here we have the matrix A and B.

Now we have to find the -7A - 6B.

In order to solve this matrix, first we have to find the value of -7A,

To find that one, we have to multiply -7 with A,

Then we get,

[tex]-7 \times\begin{bmatrix}-10 &10 &8 \\ -2& -1 &5 \\ -4& 8& -6\end{bmatrix} = \begin{bmatrix}70 &-70 &-56 \\ 14& 7 &-35 \\ 28& -56& 42\end{bmatrix}[/tex]

Similarly, we have to find the value of 6b,

In order to find that, we have to multiply 6 with the matrix B,

Then we get,

[tex]6 \times\begin{bmatrix}5 &6 &-4 \\ 10& -6 &-10 \\ -9& 1& 10\end{bmatrix} = \begin{bmatrix}30 & 36 &-24 \\ 60& -36 &-60 \\ -54& 6& 60\end{bmatrix}[/tex]

Now, we have to subtract the resulting matrix,

[tex]-7A - 6B = \begin{bmatrix}70 &-70 &-56 \\ 14& 7 &-35 \\ 28& -56& 42\end{bmatrix} - \begin{bmatrix} 30 & 36 &-24 \\ 60& -36 &-60 \\ -54& 6& 60 \end{bmatrix}[/tex]

Therefore, the resulting matrix is

[tex]-7A - 6B = \begin{bmatrix} 40 & -106 &-32 \\ -46& 43 &25 \\82 & -62& -22 \end{bmatrix}[/tex]

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