Question

The table shows the battery life of four different mobile phones.


Mobile Phone Battery Life
Phone Battery Life
(hours)
A 20
B 25
C 10
D 18


If 7.75% of the battery life of each mobile phone is used in a day by a typical user, for which mobile phone is 0.775 hour of battery life used in a day?
Phone A
Phone B
Phone C
Phone D

Answer 1

@igreen

Answer 2

To do this, you need to find 7.75% of each battery life, so turn the percent into a decimal number by moving the decimal point 2 spots to the left to give you .0775

now you take each battery life times .0775

A) 20*.0775 = 1.55
B) 25*0775 = 1.9375
C) 10*.0775 = .775
D) 18*.0775 = 1.395

so phone C has .775 hours of battery life used per day. hope this helps!