3 years ago

The distance between earth to the moon is 348,400 kilometers. What is this ditance expressed in scientific notation

Mathematics

1 answer:

Nadya [2.5K]3 years ago

5 0

I forgot how to do this but i really wish i could help u

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C) $400\pi$

Step-by-step explanation:

The formula for area is

A=pi * radius ^2

If the diameter is 40, the radius is 20

Therefore

$A=\pi 20^{2} \\A=\pi 400$

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3 years ago

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The properties 1‚ 2‚ 4‚ and 5. are used

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WITCHER [35]

Answer:

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Step-by-step explanation:

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3 years ago

IQ is normally distributed with a mean of 100 and a standard deviation of 15. a) Suppose one individual is randomly chosen. Fin

nasty-shy [4]

Answer:

Step-by-step explanation:

Let X be the IQ

IQ is normally distributed with a mean of 100 and a standard deviation of 15.

a) the probability that this person has an IQ greater than 95

= $P(X\geq 95)\\=P(Z\geq \frac{95-100}{15} \\=P(Z\geq -0.33)\\=0.1293+0.5\\=0.6293$

=62.93%

b) the probability that this person has an IQ less than 125

$=P(X\leq 125) =P(X\leq 1.67)\\=0.5-0.4525\\=0.0475$

=4.75%

c) Sample size =500

$P(X$

No of people = 0.2486(500) =124.3

d) $P(x>140)\\= P(Z>2.6)\\=0.5-0.4953\\=0.0047$

No of persons = 0.0047(500) = 2.35

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4 years ago