mamagirl6438 mamagirl6438

10-11-2022
Mathematics

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suppose that the speed at which cars go on the freeway is normally distributed with mean 70 mph and standard deviation 5 miles per hour. let x be the speed for a randomly selected car. round all answers to 4 decimal places where possible. a. what is the distribution of x? x ~ n( 70 correct, 5 correct) b. if one car is randomly chosen, find the probability that it is traveling more than 72 mph. .3446 correct c. if one of the cars is randomly chosen, find the probability that it is traveling between 71 and 75 mph. .2621 correct d. 81% of all cars travel at least how fast on the freeway? 74.39 incorrect mph. hint: helpful videos:

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