Suppose that the average time a fully charged 6-volt laptop battery will operate a computer is 3.2 hours and follows the exponential probability distribution.

a. Determine the probability that the next charge will last 1. less than 2 hours.

2. between 2.5 and 4.0 hours.

3. more than 3.5 hours.

b. Confirm the answers to part a using Excel.

AppendixLO1