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

Answer:

$2\frac{2}{5}$ hours, or 1 hours and 24 minutes

Step-by-step explanation:

4/5 battery remaining

drains at rate of 1/3 per hour

$\frac{1}{3}h=\frac{4}{5}\\\frac{3}{1}(\frac{1}{3}h)=\frac{3}{1}*\frac{4}{5}\\h=\frac{3*4}{1*5}=\frac{12}{5}=2\frac{2}{5}$

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.)