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3 years ago

The set of life spans of an appliance is normally distributed with a mean

Mathematics

2 answers:

qaws [65]3 years ago

8 0

Answer:

24 months

Step-by-step explanation:

HACTEHA [7]3 years ago

5 0

Answer:

24 months

Step-by-step explanation:

Lifespan with z-score of -3 in the the set of normally distributed life spans of an appliance can be calculated using the equation:

$z=\frac{X-M}{s}$ where

X is the lifespan we are looking for

M is the mean life span of the appliance (48 months)

s is the standard deviation of the distribution of the life spans (8 months)

We have $-3=\frac{X-48}{8}$ that is

-24=X-48 and

X=24 months.

The life span of an appliance that has a z-score of -3 is 24 months.

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Svetach [21]

Answer:

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Step-by-step explanation:

You should try the next one and I can check work or tell you if it is right.

The diameter length can be found be computing the distance that (-3,5) is to (1,9) which is sqrt(4^2+4^2)=sqrt(32).

The radius is half the diameter so it is sqrt(32)/2.

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Answer:

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Step-by-step explanation:

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