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3 years ago

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Devon is trying to find the unit price on a 6-pack of drinks on sale for $2.99. His sister says that at that price, each drink w

ould cost just over $2.00. Is she correct, and how do you know? If she is not, how would Devon’s sister find the correct price?

1 answer:

Wewaii [24]3 years ago

6 0

It's the third option

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For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.

horsena [70]

Answer:

a) p = 0.6346

b) 95% confidence interval

Lower limit: 0.5951

Upper limit: 0.6741

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 572

Number of Santa Fe black-on-whitepots , x = 363

a) proportion of Santa Fe black-on-white potsherds

$\hat{p} = \dfrac{x}{n} = \dfrac{363}{572} = 0.6346$

b) 95% confidence interval

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting the values, we get:

$0.6346\pm 1.96(\sqrt{\frac{0.6346(1-0.6346)}{572}}) = 0.6346\pm 0.0395\\\\=(0.5951,0.6741)$

Lower limit: 0.5951

Upper limit: 0.6741

5 0

3 years ago

Think of a situation that could be represented by 1/3 divided by 1/4. Describe the situation and question.

lilavasa [31]

The correct answer would be : 1/12. You can find the answer to a fraction by multiplying the denominators (bottom parts) together and by multiplying the numerators (top parts) together. (pls mark brainliest)

3 0

3 years ago

Starting with a full container, milk is poured three times. First, 1/2 of the milk is poured out, then 1/3 of what remains, and,

k0ka [10]

Answer:

1/4 of the full container remains

Step-by-step explanation:

Step 1: Half the milk is poured out

i.e 1/2 of the milk remains

Step 2: 1/3 of what remains is poured out --> 2/3 of the remaining is not poured out.

Hence amount remaining after step 2 = 2/3 x 1/2 = 1/3 of the total

Step 3: 1/4 of what remains is poured out --> 3/4 of the remaining is not poured out.

Hence amount remaining after step 3 = 3/4 x 1/3 = 1/4 of the full container remains

4 0

4 years ago

Georgie had her roof repaired. She was charged an extra 2.5% for late payment. She had to pay a total of £977.85. Calculate how

Nikolay [14]

Answer:

Answer:£23.85 is your answer.

x+2.5%ofx=£977.85

x(1+2.5/100)=£977.85

x=£977.85/(1.025)=954

saving money will be =£977.85-954=£23.85

8 0

3 years ago

Which expression is equivalent to 4+6(ac+2b)+2ac

Montano1993 [528]

Answer: 8ac+12b+4

Step-by-step explanation: Simplify the expression.

Hope this helps you out! ☺

7 0

3 years ago