The length of time patients must wait to see a doctor in a local clinic is uniformly distributed between 45 minutes and 2 1/2 hours.

(a)What is the probability of a patient waiting exactly 50 minutes?

(b)What is the probability that a patient would have to wait between 75 minutes and 2 hours? (Round your answer to two decimal places.)

(c)Compute the probability that a patient would have to wait over 2 hours. (Round your answer to two decimal places.)

(d)Determine the expected waiting time and its standard deviation (in minutes). (Round your standard deviation to two decimal places.)

E(x)= min ?

= min ?