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 8.45% of the battery life of each mobile phone is used in a day by a typical user, for which mobile phone is 0.8 hour of battery life used in a day?
Phone A
Phone B
Phone C
Phone D

Answer 1

help

Answer 2

@johnweldon1993

Answer 3

Okay...so we have 8.45% which is written as 0.0845

So SOME number times this percentage will equal 0.8

\[\large 0.0845x = 0.8\]
So to solve for 'x' we divide both sides by 0.0845
\[\large x = \frac{0.8}{0.0845} = ?\]