The duration t (in minutes) of customer service calls

Last updated: 8/13/2022

The duration t (in minutes) of customer service calls received by a certain company is given by the following probability density function. (Round your answers to four decimal places.) f(t) = 0.4e-0.4t t≥ 0 (a) Find the probability that a call selected at random lasts 2 minutes or less. (b) Find the probability that a call selected at random lasts between 6 and 11 minutes.