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Vita -582 take 1.
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So in this question, we are assuming here that the average speed for cars traveling at a particular highway is 66.
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And the standard deviation is 4 miles per, in this case mph.
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So let me put here the unit.
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So basically, we are saying that this speed, which i'm going to write as x, x here is the speed is said to be normal with these two parameters, the mean, and this derivation that they gave.
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Now, with these information, we need to find what is the probability that if you select a car at random, traveling the highway, what is the probability that its speed will be less than 60? so because we have normal distribution for this speed, we can compute this probability, using the z score method here, which basically computes this probability in the standard normal distribution, because in that way we can use the z table to find this probability...