Question

After each charging, a battery is able to hold only 99% of the charge from the previous charging. The battery was used for 15 hours on its first charge before it had to be recharged. What is the total number of hours the battery can be used over its lifetime?

Answer 1

Answer: 13.5 hours or 14 hours (if you round it)

Step-by-step explanation:

$\frac{0.90}{1.00}$ * 15

=13.5