An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months

* draw a curve for the questions

3. Determine the proportion of scanners that can be expected to still work after 39 years. a. 30.85% b. 19.15% c. 50.00% d. 80.85% e. 69.15%

Within what amount of time would 95.05% of the scanners have failed? a. 23.6 years b. 34.4 years c. 45.1 years d. 44.8 years e. 47.6 years