Question

When Sierra first purchased her laptop, the battery lasted for 180 minutes. If the battery life decreases by 5.3% each year, which function represents how long the battery will last after t years?

A) B(t) = 180(0.053)t
B) B(t) = 180(0.947)t
C) B(t) = (180)(0.947)t
D) B(t) = 180(1.053)t

I believe it's B) B(t) = 180(.0947)

Answer 1

Since 1-0.053 (5.3%) = 0.947.

Answer 2

yes, youre correct