Question

a formula that can be determined A, the amount in an account that earns simple interest, where P is the principal, r is the annual interest rate expressed as a decimal, and t is the time in years since the principal was deposited in the account

Answer 1

`A = P(1 + rt)`

Explanation:

The principal of the amount P is deposited in an account that earns simple interest.

The interest that the account earns is r annual interest rate expressed as a decimal.

The principal P is invested for t years.

Therefore, the matured amount A will be given by

`A = P(1 + rt)`

Hence, this is the formula that can calculate the A if P, r and t are known. (Answer)