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3 years ago

Help could u guys add an explanation on how u got the answer too? thanks!

Mathematics

2 answers:

fenix001 [56]3 years ago

7 0

Answer:

Step-by-step explanation:

I'm just guessing though.

Fynjy0 [20]3 years ago

5 0

Answer:

Step-by-step explanation:

f(x) = x^2+1

f(2) = 2^2+1 = 4+1 = 5

g(x) = 3x+1

g(3) = 3(3)+1 = 9+1 = 10

f(2)+g(3) = 5+10 =15

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The heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What

Nutka1998 [239]

Answer:

The probability that an 18-year-old man selected at random is greater than 65 inches tall is 0.8413.

Step-by-step explanation:

We are given that the heights of 18-year-old men are approximately normally distributed with mean 68 inches and a standard deviation of 3 inches.

Let X = heights of 18-year-old men.

So, X ~ Normal( $\mu=68,\sigma^{2} =3^{2}$ )

The z-score probability distribution for the normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = mean height = 68 inches

$\sigma$ = standard deviation = 3 inches

Now, the probability that an 18-year-old man selected at random is greater than 65 inches tall is given by = P(X > 65 inches)

P(X > 65 inches) = P( $\frac{X-\mu}{\sigma}$ > $\frac{65-68}{3}$ ) = P(Z > -1) = P(Z < 1)

= 0.8413

The above probability is calculated by looking at the value of x = 1 in the z table which has an area of 0.8413.

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3 years ago

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100% CORRECT ANSWERS

Question 1

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2 years ago

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<h2>Answer:</h2>

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Step-by-step explanation:

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Step-by-step explanation:

The Triangle Inequality Theorem states that this is not possible.

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3 years ago

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