Question

Jean invests $800 in a fund. The investment doubles in value each year. The formula
A = 800(2)” models the total value of the investment, A, in dollars, after n years. What
is the value of her investment after 4 years?

Answer 1

Given that the investment is doubled each year as expressed in the following equation:

$A=800(2)^n$

Where

A is the total value of the investment after a determined number of years.

n represents the number of years

To calculate the final amount after 4 years, you have to replace the formula with n=4 and calculate the final amount:

$\begin{gathered} A=800(2)^4 \\ A=800\cdot16 \\ A=12800 \end{gathered}$

After 4 years the value of the investment will be $12,800