3 years ago

Nolan begins a savings account with $100 at 2% interest

Mathematics

1 answer:

gogolik [260]3 years ago

3 0

Interest is 100*(2/100)
$2

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Step-by-step explanation:

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Answer:

The 99% confidence interval is $71.67 < \mu < 78.33$

Step-by-step explanation:

From the question we are told that

The sample size is $n = 15$

The sample mean is $\= x = 75$

The standard deviation is $s = 5$

Given that confidence is 99% then the level of significance is mathematically represented as

$\alpha = 100 - 99$

$\alpha = 1\%$

$\alpha = 0.01$

Next we obtain the critical values of $\frac{ \alpha }{2}$ from the normal distribution table

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$Z_{\frac{ \alpha }{2} } = 2.58$

Generally the margin for error is mathematically represented as

$E = Z_{\frac{ \alpha }{2} } * \frac{ s}{ \sqrt{n} }$

=> $E = 2.58 * \frac{ 5}{ \sqrt{15} }$

=> $E = 3.3307$

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$\= x -E < \mu < \= x +E$

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3 years ago

If the volume of a cone is 12.56, and the height is 3. What is the radius of the cone? R=

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Answer:

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Step-by-step explanat

I hope to help you

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2 years ago