Jill is playing cards with her friend when she draws a card from a pack of 20 cards numbered from 1 to 20. what is the probability of drawing a number that is square

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)

Sections of prefabricated woods are each 5 1/3 feet long, how long are 7 1/2 sections placed end to end?

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )