List 3 ways you can use an answer key effectively

With both problems. a.s.a.p directions on photo ^

Solve 13 + w/7= -18 (w/7 is a fraction)

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)