3 years ago

At the doctor’s office, Martin learns that his heart beats 360 times in 5 minutes.How many does his heart beat per minute?

1 answer:

8 0

To find this answer, just divide 360 by 5 to find out how many times his heart beats in one minute instead of 5. Doing this will give you a final answer of 72 bpm.

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The director of the library believes that 14% of the library's collection is checked out. If the director is right, what is the

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Answer: 0.2643

Step-by-step explanation:

Let p be the population proportion and $\hat{p}$ be the sample proportion .

As per given question , we have

$p=0.14\\\\ \hat{p}=0.13\\\\ n=478$

z-score : $\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

$z=\dfrac{0.13-0.14}{\sqrt{\dfrac{0.14(1-0.14)}{478}}}\\\\=-0.630087269176\approx-0.63$

The required probability ( using z-table ):-

$P(z$

Hence, the probability that the proportion of books checked out in a sample of 478 books would be less than 13% = 0.2643

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Step-by-step explanation:

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The cost of mining gold for a mining company is $920 per gram.How much will it cost the company to mine 0.2 kilograms?

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Explain the meaning of 0 on the running back loses 7 yards on his carry

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What is the length of the segment whose endpoints are A(-4, 3) and B (10, 6)?

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