A specific chemical reaction to break down a compound follows a normal distribution with a mean time of 190 seconds and a standard deviation of 4 seconds.
A) What is the probability that the reaction takes less than 180 seconds?
B) How many standard deviations is a reaction time of 202 seconds from the mean?
C) What is the probability that the reaction takes between 180 and 200 seconds?
D) What is the probability that the reaction takes more than 198 seconds?
