Question

Bodie Raptor's Iphone 11 has 4/5 of the battery still remaining. His phone battery drains at a rate of 1/3 every hour. If he uses his phone continuously, how many more hours will his phone last. Please give your answer as a mixed number in simplest form in the form of A . b/c

Answer 1

`2(2)/(5)` hours, or 1 hours and 24 minutes

Explanation:

4/5 battery remaining

drains at rate of 1/3 per hour

`(1)/(3)h=(4)/(5)\\(3)/(1)((1)/(3)h)=(3)/(1)*(4)/(5)\\h=(3*4)/(1*5)=(12)/(5)=2(2)/(5)`

He has 2 2/5 hours or 2 hours and 24 minutes left until his phone dies. (A fifth of an hour is 12 minutes and we have 2/5 to deal with, so 12 times 2 is 24 mins.)