Question

The table shows the annual increase in cost in t years for certain grocery items. based on the formula A=C(1+r)^t , which equation could you use to determine the cost in t years for a gallon of milk?

A) A=4.25t(1.1)
B) A=4.25(1.10)^t
C) A=4.25(0.10)^t
D) A=4.25(0.90)^t

Answer 1

It’s C

Explanation:

Us test prep

Answer 2

B.

`A=4.25(1.10)^t`

EXPLANATION

The cost in t years is given by:

`A=C(1+r)^t`

where C=£4.25 and r=10% or r=0.10

We substitite the given values into the formula to obtain:

`A=4.25(1+0.10)^t`

The equation to use to determine the cost in t years for a gallon of milk is:

`A=4.25(1.10)^t`

The correct choice is B.