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2 years ago

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Kacie swam for 12 hours this week at YMCA pool. 25% of her pool time was spent on tree swim. The rest was in swimming classes. H

ow many hours did Kacie spend in swimming classes?

1 answer:

bezimeni [28]2 years ago

8 0

Answer:

9 hours

Step-by-step explanation:

25% of 12 is 1/4 of 12.

12/4 is 3.

25% of 12 is 3.

12-3=9

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8. Given the standard deviation of 16 for a population and a 95% confidence level, find the margin

Kazeer [188]

Answer:

4.0486

Step-by-step explanation:

The margin of error is calculated using $E=z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} }$

Where n=60 is the sample size and $\sigma=16$ is the population standard deviation.

The critical value corresponding to 95% confidence interval is $z_{\frac{\alpha}{2}}=1.96$

We substitute the values to obtain;

$E=1.96*\frac{16}{\sqrt{60} }$

$E=1.96*2.06559=4.0486$

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Answer:

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Step-by-step explanation:

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Answer:

C

Step-by-step explanation:

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Brand A has a recognition value worth $47 billion more than brand B. If the total value of these two brands is $101 billion,

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