A company performed power tests on a set of batteries of the same type. The company 10 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 of use?

Question

Casey Barnes

Mathematics

19 October, 16:46

A company performed power tests on a set of batteries of the same type. The company 10 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 of use?

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Answers (1)

Know the Answer?

Abril Davila · Answer 1

For this case we have the following equation:

y = 100 - 8.9x

Where,

x = the number of hours of use

For 11 hours of use we have x = 11.

Substituting:

y = 100 - 8.9 * (11)

y = 2.1%

Answer:

the best prediction of the percent of remaining power for a battery after 11 hours of use is:

y = 2.1%