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anzhelika [568]
3 years ago
12

What the answer to this "difficult" math equation?

Mathematics
2 answers:
Andrew [12]3 years ago
7 0

Answer: 1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9+10+10-90=20

Step-by step explanation:

Ksju [112]3 years ago
3 0

Answer:

1 + 1 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5 + 6 + 6 + 7 + 7 + 8 + 8 + 9 + 9 + 10 + 10 - 90 = 20

Step-by-step explanation:

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Answer:

The proportion of students whose height are lower than Darnell's height is 71.57%

Step-by-step explanation:

The complete question is:

A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 centimeters. Darnel is a middle school student with a height of 161.4cm.

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Answer:

We first calculate the z-score corresponding to Darnell's height using:

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

We substitute x=161.4 , \mu=150, and \sigma=20 to get:

Z=\frac{161.4-150}{20} \\Z=0.57

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Therefore the proportion of students whose height are lower than Darnell's height is 71.57%

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