3 years ago

Help!!!!!!!!!!!!!!!!!!!!!!!!!!! im a dummy

Mathematics

1 answer:

tigry1 [53]3 years ago

8 0

your scientific notation will be 2.505 x 10^4

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The average speed of a car driving down freeway is 70mph with a standard deviation of 5mph. Thid speed is normally distributed.

ikadub [295]

Answer:

0.081,0.2621,0.645,0.919

Step-by-step explanation:

Let X be the average speed of a car driving down freeway

Given that X is normal with mean as 70mph with a standard deviation of 5mph.

To convert to Z score we do

$Z =\frac{x-70}{5}$

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$=P(X>77)\\=P(Z>1.4)\\=0.081$

b) probability that a randomly selected car is driving between 65 and 69 mph

= $P(-1$

c) the probability that a randonly selected car is driving between 67 and 77mph

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d) the probability that a randomly selected car is driving less than 77mph

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3 years ago

Which set of ordered pairs don’t represent a function

babunello [35]

Answer:

The first multiple-choice doesn't represent a function

Step-by-step explanation:

(-4,3),(1,-6),(-8,-1),(1,9)

because a function has two pairs with the same x value

*hope that makes sense*

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