Peter drove at an average speed of 120 km/h for 3 1/2 hours. If he has increased his speed by 20 km/h, how much time would he have saved?

Having a hard time understanding this question (see attachment).

Intro biblioteca sunt 462 de carti cu 198 mai putine enciclipedii si cu 47 mai multe dictionare decat enciclopedii cate enciclopedii sunt in biblioteca

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.)