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3 years ago

Can someone help me?

Mathematics

1 answer:

horrorfan [7]3 years ago

4 0

Hi Eli!

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We Know:

1 1/2 cups of flour.

3/4 cup of white sugar.

1/8 cup of brown sugar.

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Part A:

I can't use a number line answering this question but you can create one with the steps I tell you.

First find common denominators:

1 1/2 = 3/2 = 12/8

3/4 = 6/8

1/8

Create a number that goes from 0/8 to 12/8, which means put a number with 12, 1/8 plots on it. Then plot 12/8, 6/8, and 1/8 in order in the number line.

Find out the total number of cups used:

12/8 + 6/8 + 1/8 = 19/8

Simplify:

19/8 = 2 3/84

Part A Answer: There are <u>2 3/8 cups</u> used all together.

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Part B:

Part B Answer: The <u>3 cup bowl</u> would work perfectly.

Why: The reason you would want to choose the 3 cup bowl is because it fits all the ingredients perfectly, the 3 cup bowl is greater than the 2 3/8 cups they used. You can't use 2 cups because it is less than the total cups of ingredients. The 4 bowl you could use but it is too big.

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Hope This Helps :)

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Answer:

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lana66690 [7]

Answer:

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And rounded up we have that n=4906

b) For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

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And rounded up we have that n=6724

Step-by-step explanation:

We need to remember that the confidence interval for the true proportion is given by :

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Part a

The estimated proportion for this case is $\hat p =0.76$

Our interval is at 90% of confidence, and the significance level is given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . The critical values for this case are: