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oksano4ka [1.4K]
3 years ago
10

Can I have some help please And please make sure it's right

Mathematics
1 answer:
ElenaW [278]3 years ago
6 0

Answer: OPTION C.

Step-by-step explanation:

According to the Quotient of powers Property, if you divide two numbers whose base is the same, you must rewrite the base and subtract the exponents. Observe:

\frac{a^m}{a^n}=a^{(m-n)}

Notice that "a" is the base and "m" and "n" are the exponents.

Therefore, knowing this property, you can solve the exercise.

Given the following expression:

\frac{3^{15}}{3^3}

You can notice that the base 3 is in the numerator and in the denominator, then you must  apply the Quotient of powers Property and subtract the exponents.

You get that the result is:

=3^{(15-3)}=3^{12}

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Answer:

(B) The standard normal variable Z counts the number of standard deviations that the value of the normal random variable X is away from its mean

Step-by-step explanation:

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Z = \frac{X - \mu}{\sigma}

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