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3 years ago

50-(5×5)+13 help me solve

Mathematics

2 answers:

mestny [16]3 years ago

8 0

Answer:

Step-by-step explanation:

50-(5×5)+13

Do the parentheses first

50 - (25) + 13

Then we add and subtract from left to right.

25 +13

Lunna [17]3 years ago

7 0

Answer: Its 12

5 times 5 is 25 plus 13 is 38. 50 minus 38 is 12

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Answer: a) $0.490\leq p\leq0.582$

b) $0.501\leq p$

Step-by-step explanation:

Given : Sample size of respondents in the exit polls : n= 2020

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Sample proportion: $\hat{p}=\dfrac{412}{768}\approx0.536$

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Confidence interval for proportion:-

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$\hat{p}- z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.536-(1.96)\sqrt{\dfrac{0.536(1-0.536)}{768}}\\\\=0.536-0.035=0.501$

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