Statistics probability - normal distribution questions?

For a car traveling 60 kilometers per hour (km/h), the distance required to brake to a stop is normally distributed, with mean of 20 meters and a standard deviation of 2.4 meters. Suppose you are traveling 60 km/h in a residential area and a car moves abruptly into your path at a distance of 20 m. (a) If you apply... show more For a car traveling 60 kilometers per hour (km/h), the distance required to brake to a stop is normally distributed, with mean of 20 meters and a standard deviation of 2.4 meters. Suppose you are traveling 60 km/h in a residential area and a car moves abruptly into your path at a distance of 20 m.

(a) If you apply your brakes, what is the probability that you will brake to a stop within
18m or less?
(b) What is probability that you will avoid collision?

How would I solve these?
2 answers 2