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Genrish500 [490]
3 years ago
8

Suppose that a normal distribution has a mean of 20 and a standard deviation of 4. What is the z-score of 13?

Mathematics
1 answer:
Papessa [141]3 years ago
5 0

Answer:

-1.75.

Step-by-step explanation:

The z-score = (n - m) / d  where n is the value (13) m = mean and d = standard deviation.

= (13 - 20) / 4

= -1.75  (answer)

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MAVERICK [17]

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Answer:

  about 71.6°

Step-by-step explanation:

The relevant trig function is ...

  Tan = Opposite/Adjacent

Here, the "opposite" side of the right triangle is the height of the tower. The "adjacent" side is the distance to the tower. Then if the angle is x, we have ...

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Megan's angle of elevation is about 71.6°.

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3 years ago
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This is one way you could write out the steps

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castortr0y [4]

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because everything is relative to each other.

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Step-by-step explanation:

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