3 years ago

PLEASW HELP FAST! Giving may points away, and brainlist

Mathematics

1 answer:

nalin [4]3 years ago

5 0

4x² - 19 → B

substitute x = g(x) into f(x)

f(g(x)) = f(x² - 5) = 4(x² - 5 ) + 1 = 4x² - 20 + 1 = 4x² - 19

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Corlos bought a book for $9 . now he would like to buy 4 other books for the same price .how much will he have to pay in all for

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3 years ago

Assume the upper arm length of males over 20 years old in the United States is approximately Normal with mean 39.2 centimeters (

MAVERICK [17]

Answer:

The interval [32.6 cm, 45.8 cm]

Step-by-step explanation:

According with the 68–95–99.7 rule for the Normal distribution: If $\large \bar x$ is the mean of the distribution and s the standard deviation, around 68% of the data must fall in the interval

$\large [\bar x - s, \bar x +s]$

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So, the range of lengths that covers almost all the data (99.7%) is the interval

[39.2 - 3*2.2, 39.2 + 3*2.2] = [32.6, 45.8]

This means that if we measure the upper arm length of a male over 20 years old in the United States, the probability that the length is between 32.6 cm and 45.8 cm is 99.7%

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3 years ago

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