Answer:
A 20
Step-by-step explanation:
Given
Phone Battery Life (hours)
A 20
B 25
C 10
D 18
8.45% of the battery life of each mobile phone is used in a day by a typical user
Calculating Hours of battery life in a day for each mobile
A 20
Battery life for A = [tex]\frac{8.45}{100}\times 20 = 1.69[/tex]hours
B 25
Battery life for B = [tex]\frac{8.45}{100}\times 25 = 2.11[/tex]hours
C 10
Battery life for C = [tex]\frac{8.45}{100}\times 10 = 0.845[/tex]hours
D 18
Battery life for D = [tex]\frac{8.45}{100}\times 18 = 1.52[/tex]hours
Therefor Mobile phone A 20 uses a total of 1.69 hours of battery life in a day
