Question

when Nolan left his house this morning, his cell phone was 30% charged and it then started to lose 5% charge for each hour thereafter. Write an equation for B, in terms of t, representing the charge remaining in Nolan's battery, as a percentage, t hour after Nolan left his

Answer 1

b= 30 -5t

1) Gathering the data

30%=0.3

5% = 0.05

Setting a table

charge hour

30% 0

25% 1

20% 2

15% 3

The first part 30-5b is the charge in %, t is the instant

30-5t =b