Question

Mark charged a battery. Each minute, the percentage of the battery's capacity that was charged increased by 2 . 5 2.52, point, 5 percent. After 1 7 1717 minutes of charging, the battery was 6 1 . 5 61.561, point, 5 percent full. How full was the battery when the charging began?

Answer 1

19 %

32.4 minutes to be fully charged

i just did it on khan

Answer 2

I think the answer is the battery was 19 percent full when the charging began.