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3 years ago

4/5 x 3/4 multiplying fractions

Mathematics

2 answers:

IgorLugansk [536]3 years ago

7 0

Step-by-step explanation:

hope it's helpful for you

pls mark me as brainliest

tatyana61 [14]3 years ago

7 0

ANSWER

My answer is in the photo above

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For each level of precision, find the required sample size to estimate the mean starting salary for a new CPA with 95 percent co

Rzqust [24]

Answer:

(a) Margin of error ( E) = $2,000 , n = 54

(b) Margin of error ( E) = $1,000 , n = 216

(c) Margin of error ( E) = $500 , n= 864

Step-by-step explanation:

Given -

Standard deviation $\sigma$ = $7,500

$\alpha$ = 1 - confidence interval = 1 - .95 = .05

$Z_{\frac{\alpha}{2}}$ = $Z_{\frac{.05}{2}}$ = 1.96

let sample size is n

(a) Margin of error ( E) = $2,000

Margin of error ( E) = $Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}$

E = $Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}$

Squaring both side

$E^{2} = 1.96^{2}\times\frac{7500^{2}}{n}$

$n =\frac{1.96^{2}}{2000^{2}} \times 7500^{2}$

n = 54.0225

n = 54 ( approximately)

(b) Margin of error ( E) = $1,000

E = $Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}$

1000 = $Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}$

Squaring both side

$1000^{2} = 1.96^{2}\times\frac{7500^{2}}{n}$

$n =\frac{1.96^{2}}{1000^{2}} \times 7500^{2}$

n = 216

E = $Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}$

500 = $Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}$

Squaring both side

$500^{2} = 1.96^{2}\times\frac{7500^{2}}{n}$

$n =\frac{1.96^{2}}{500^{2}} \times 7500^{2}$

n = 864

7 0

3 years ago

ANSWER PLEASE !!<br> -2x-5=10<br> 4x+2y=8<br> -6x+2y=12

son4ous [18]

Answer:

x= -15/2 y=-33/2

Step-by-step explanation:

i dont know how you want to solve it but if it is "system of equations" then first solve for the first variable in on e of the equations, then substitute the result into the other equation.

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3 years ago

The tables for f(x) and g(x) are shown below.

Vinvika [58]

Answer:

Step-by-step explanation:

(f - g)(5) = f(5) -g(5)

From the tables, ...

f(5) = 29

g(5) = 13

Your desired function is ...

f(5) -g(5) = 29 -13 = 16

8 0

3 years ago

Ivan has 15 yards of green felt and 12yards of blue felt to make 3 quiltsif ivan uses the same total number of yards for each qu

Juliette [100K]

ivan used 5 yards of green for each quilt and 4 yards of blue for each quilt.

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3 years ago

Which would be a good estimate for the tax on $97.95 if the tax is 9.5%?$12$10.50$10$8.50

mamaluj [8]

First you need to turn 9.5% into a decimal so you need to move the dot " . " over to the left two times 9.5 ---> .95 ---> .095
Now that you turned the % into a decimal all thats left to do is multiply .095 by $97.95
$97.95 * .095= $9.30525 or $9.31
So the tax is $91.31

8 0

3 years ago

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