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3 years ago

6

The art club spent $45 on supplies for valentines to sell during lunches. They made 60 valentines. What selling price for a vale

ntine would result in a profit of zero if all the valentines are sold?

1 answer:

Agata [3.3K]3 years ago

4 0

I cannot help you sorry :/

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The Wall Street Journal reported that automobile crashes cost the United States $162 billion annually (2008 data). The average c

ivanzaharov [21]

Answer:

$n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94$

So the answer for this case would be n=94 rounded up to the nearest integer

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma= 500$ represent the population standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{s}{\sqrt{n}}$ (a)

And on this case we have that ME =120 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The confidence2 level is 98% or 0.98 then the significance level would be $\alpha=1-0.98=0.02$ and $\alpha/2=0.01$ , the critical value for this case would be $z_{\alpha/2}=2.326$ , replacing into formula (b) we got:

$n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94$

So the answer for this case would be n=94 rounded up to the nearest integer

8 0

3 years ago

the length of a rectangle is 8 less than twice the width. the perimeter is 38 feet. Find the length and width. someone please he

Aleksandr-060686 [28]

Answer:L=4 W=15

Step-by-step explanation:

P=2L+2W

38-8=30

If length is 8 less than twice the width and the perimeter is 38, then subtract 38-8 which is 30, then divide 30 by 2 to get 15.

P=2(4) +2(15)

P=38

7 0

3 years ago

Pizza planet is running a speacial.3 pizzas for 16.50 what is the unit rate for one pizza

drek231 [11]

For this you divide the total spent by the total number of pizzas...
16.50/ 3 = $5.50 per pizza.

6 0

3 years ago

Jeremy spends $4.00 for breakfast and then spends $4.00 for lunch

vazorg [7]

Answer:

He spends 8 dollars

Step-by-step explanation:

4 + 4 = 8

Hopefully this helps you :)

pls mark brainlest ;)

3 0

3 years ago

What is the image point of (2,6) after a translation right 5 units and down 3 units?

JulijaS [17]

Answer:

(7, 3)

Step-by-step explanation:

(2+5, 6-3) = (7, 3)

4 0

3 years ago

Read 2 more answers