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3 years ago

7

Jill made scarves and then sold them for $15 each. If Jill spent $150 to make all the scarves, how many scarves need to be sold

so that Jill doesn't lose money?

2 answers:

hram777 [196]3 years ago

7 0

Answer:

10 scarves

Step-by-step explanation:

lesantik [10]3 years ago

3 0

Answer:

10 scarves

Step-by-step explanation:

each scarf is $15, 10 of them is 150 because 10 x 15 = 150

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To find the miles for 3rd day, we take away the miles she biked for the first two day from the total.

$50 - 17 \dfrac{7}{8} - 18\dfrac{5}{7}$

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$= 13 \dfrac{23}{56} \text { miles }$

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Answer: She traveled 13 23/56 miles on the third day.
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solmaris [256]

Answer:

Sample size n = 1382

so correct option is D) 1382

Step-by-step explanation:

given data

confidence level = 99 %

margin of error = 3%

probability = 25 %

to find out

How large a sample size needed

solution

we know here P = 25 %

so 1 - P = 1 - 0.25

1 - P = 0.75

and we know E margin of error is 0.03 so value of Z for 99%

α = 1 - 99% = 1 - 0.99

α = 0.01

and $\frac{\alpha}{2}$ = $\frac{0.01}{2}$

$\frac{\alpha}{2}$ = 0.005

so Z is here

$Z_(\frac{\alpha}{2})$ = 2.576

so

sample size will be

Sample size n = $(\frac{(Z_(\frac{\alpha}{2})}{E})^2 * P * (1-P)$

put here value

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