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2 years ago

Hi, can you help me answer this question please, thank you!

Mathematics

1 answer:

slavikrds [6]2 years ago

5 0

Problem Statement

We are asked to find the critical t-value for a confidence level of 80% and sample size of 17.

Method

To solve this, we simply need to do two things:

1. Calculate the degrees of freedom:

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Monica is completing an Algebra test worth 100 points. There are 14 questions on the test that are equally valued. How many poin

Usimov [2.4K]

Answer:

7.1 points

Step-by-step explanation:

100/14=7.1 points

3 0

3 years ago

As a mixed number 3/5+4/5=

stiks02 [169]

The answer would be 1 11/20.

4 0

3 years ago

HELP ASAP will give brainliest

Natalka [10]

Average rate of change is 0

Interpretation: The crop yield did not change from year 5 to year 15

Solution:

The function that models the yield is:

$f(x) = -x^2 + 20x + 75$

The average rate of change of f(x) from x = a to x = b is given by the formula:

$\text{ average rate of change }=\frac{f(b)-f(a)}{b-a}$

Find and interpret the average rate of change from year 5 to year 15

$f(5) = -(5)^2 + 20(5) + 75\\\\f(5) = -25 + 100 + 75\\\\f(5) = 150$

$f(15) = - (15)^2 + 20(15) + 75\\\\f(15) = -225 + 300 + 75\\\\f(15) = 150$

Thus average rate of change:

$\text {average rate of change}=\frac{f(15)-f(5)}{15-5}$

$\text {average rate of change}=\frac{150-150}{10}=0$

Thus Average rate of change is 0

Interpretation: The crop yield did not change from year 5 to year 15.

7 0

3 years ago

Read 2 more answers

Mary sells fruit with four of her friends. If the earnings are divided evenly, how

nignag [31]

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

Let the total money earned be x

since each of them get equal share, therefore :

$\qquad \tt \dashrightarrow \:5 \times 30 = x$

$\qquad \tt \dashrightarrow \:x = \$150$

And here, we used Total earning as the variable in the problem ~

So, correct choice is D

5 0

2 years ago

Read 2 more answers

An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20cm.

Komok [63]

We know that
the area A of the circular cross section of the pipe is
A=pi*r²
D=20 cm------------- > r=D/2=20/2=10 cm
then
A=pi*10²=100*pi cm²

the answer is A=100*pi cm²

6 0

3 years ago