Question

A company performed power tests on a set of batteries of the same type. The company determined that the equation y=100-8.9x, where x is the number of hours of use and y is the percent of battery power remaining, models the battery life. Based on the equation, what is the best prediction of the percent of remaining power for a battery after 11 hours if use?

Answer 1

Battery life: y=100-8.9x Where y = percentage remaining after x hours of operation.

In the current task, x = 11 hours.

Substituting,

y= 100 - 8.9*11 = 100-97.9 = 2.1 %
Therefore, after 11 hours of use, the percentage of power remaining will be 2.1%