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puteri [66]
3 years ago
13

What is the imaginary part of the number 9?​

Mathematics
1 answer:
KengaRu [80]3 years ago
4 0

Answer:

<h2>0i</h2>

Step-by-step explanation:

The imaginary number has form:

<em>a + bi</em>

<em>a</em><em> - real part</em>

<em>bi</em><em> - imaginary part</em>

<em>i</em><em> - imaginary unit (i = √-1)</em>

We have the number 9.

<em>9</em><em> is a real part</em>

An imaginary part is equal 0.

Therefore the imaginary part of number 9 is 0i.

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Answer:

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Step-by-step explanation:

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3 years ago
One measure of an athlete’s ability is the height of his or her vertical leap. Many professional basketball players are known fo
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Answer:

(1) P(\bar X < 26 inches) = 0.0436

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Step-by-step explanation:

We are given that the mean vertical leap of all NBA players is 28 inches. Suppose the standard deviation is 7 inches and 36 NBA players are selected at random.

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Assuming the data follows normal distribution; so the z score probability distribution for sample mean is given by;

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where, \mu = population mean vertical  leap = 28 inches

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(2) <em>Now, here sample of NBA players is 26 so n = 26.</em>

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    P(\bar X < 28.5) = P( \frac{\bar X - \mu}{\frac{\sigma}{\sqrt{n} } } < \frac{28.5-28}{\frac{7}{\sqrt{26} } } ) = P(Z < 0.36) = 0.64058 {using z table}                      

    P(\bar X \leq 27.5) = P( \frac{\bar X - \mu}{\frac{\sigma}{\sqrt{n} } } \leq \frac{27.5-28}{\frac{7}{\sqrt{26} } } ) = P(Z \leq -0.36) = 1 - P(Z < 0.36)

                                                        = 1 - 0.64058 = 0.35942

Therefore, P(27.5 inches < \bar X < 28.5 inches) = 0.64058 - 0.35942 = 0.2812

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