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3 years ago

1. The measure of side c is 150 feet and the

Mathematics

1 answer:

devlian [24]3 years ago

3 0

Answer:

Step-by-step explanation:

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A toy store’s percent markup is 50%. The wholesale price of a model train is $77. Find the retail price.

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It's original price was $38.50

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3 years ago

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Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best po

Brrunno [24]

Answer: (0.63, 7.07)

Step-by-step explanation:

The confidence interval for population proportion is given by :-

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

Given : $\hat{p} =0.7$ ; $n=110$

Significance level : $1-0.90=0.1$

Critical value : $z_{\alpha/2}=1.645$

Now, a 90% confidence interval for population proportion will be :-

$0.7\pm (1.645)\sqrt{\dfrac{0.7(1-0.7)}{110}}\\\\\approx0.7\pm0.07\\\\=(0.7-0.07,0.7+0.07)=(0.63,\ 7.07)$

Hence, a 90% confidence interval for population proportion = (0.63, 7.07)

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3 years ago

(I’ll mark brainliest ) The cross country running team is hosting their first home race and needs to plan and set up the course.

Aneli [31]

Answer:

Smallest: 15,840 ft

Largest: 16,896 ft

Step-by-step explanation:

1 mi = 5,280 ft

Setup proportion to solve for the <u>smallest</u>:

$\frac{1mi}{5,280ft} =\frac{3mi}{xft}$

Do butterfly method and you should get this:

$xft=3(5280)\\x=15,840ft$

Setup proportion to solve for the <u>largest</u>:

$\frac{1mi}{5,280ft} =\frac{3.2mi}{xft}$

Butterfly method:

$xft=3.2(5280)\\x=16,896ft$

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3 years ago

I need help look at the picture

alexira [117]

Answer:

option 1

Step-by-step explanation:

i was just doing that question

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3 years ago

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What is 0.489 in word form please answer

stich3 [128]

Answer:

four hundred eighty nine thousandths

Step-by-step explanation:

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3 years ago