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3 years ago

I need the answer can someone please help me!!

Mathematics

1 answer:

Mamont248 [21]3 years ago

5 0

Answer: 2.16

Step-by-step explanation: What I was taught is first make 27/5 which should be 5.4 then 5/2 is 2.5 then you would subtract 2.16 . Hope it works

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Help! I will give brainliest!!!!

Strike441 [17]

Answer:

3.14 (or pi ) feet

Step-by-step explanation:

Entire circle circumference = pi *d = 8 pi feet

45 degrees is a fraction of the entire 360 degrees of the circle

45 / 360 * 8 pi = pi = 3.14 ft

4 0

2 years ago

28 is increased by 150%. what's the final number

sp2606 [1]

Answer:

Step-by-step explanation:

20x(1+150%)

28x(1+1.5)

28x2.5

5 0

2 years ago

Which could be the result of compressing the graph of y = -8x – 12 and reflecting it across the horizontal line

telo118 [61]

Answer:

C or D

Step-by-step explanation:

5 0

3 years ago

A circle has a diameter of 5 ft. What is the circumference of the circle? Round to nearest hundreth

yawa3891 [41]

Answer:

15.70

Step-by-step explanation:

$5 \times 3.14 = 15.70$

5 0

3 years ago

Read 2 more answers

In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the fol

Julli [10]

Answer:

$0.071,1.928$

Step-by-step explanation:

Downtown Store North Mall Store

Sample size n 25 20

Sample mean $\bar{x}$ $9 $8

Sample standard deviation s $2 $1

$n_1=25\\n_2=20$

$\bar{x_1}=9\\ \bar{x_2}=8$

$s_1=2\\s_2=1$

$x_1-x_2=9-8=1$

Standard error of difference of means = $\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}$

Standard error of difference of means = $\sqrt{\frac{2^2}{25}+\frac{1^2}{20}}$

Standard error of difference of means = $0.458$

Degree of freedom = $\frac{\sqrt{(\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}})^2}{\frac{(\frac{s_1^2}{n_1})^2}{n_1-1}+\frac{(\frac{s_2^2}{n_2})^2}{n_2-1}}$

Degree of freedom = $\frac{\sqrt{(\frac{2^2}{25}+\frac{1^2}{20}})^2}{\frac{(\frac{2^2}{25})^2}{25-1}+\frac{(\frac{1^2}{20})^2}{20-1}}$

Degree of freedom =36

So, z value at 95% confidence interval and 36 degree of freedom = 2.0280

Confidence interval = $(x_1-x_2)-z \times SE(x_1-x_2),(x_1-x_2)+z \times SE(x_1-x_2)$

Confidence interval = $1-(2.0280)\times 0.458,1+(2.0280)\times 0.458$

Confidence interval = $0.071,1.928$

Hence Option A is true

Confidence interval is $0.071,1.928$

4 0

3 years ago