9 The lifetimes of the 60 watt light bulbs produced by the

Last updated: 5/4/2023

9 The lifetimes of the 60 watt light bulbs produced by the Lucifine Company are distributed randomly with an average lifetime of 560 hours The percentage of bulbs with lifetimes of x hours or less is approximately modeled by 100 f x 1 e 0 04 x 560 The production manager wishes to find the time x that equals or exceeds the lifetime of 68 of the bulbs Solve for this time Round to the nearest hour 10 An initial investment of 2000 doubles in value in 8 1 years Assuming continuous compounding what was the interest rate Round to the nearest tenth of a percent