Name: SAT Math Help & School Math Mastery
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#34730

equations

formulas

medium

75 sec

The formula for the total amount $A$ in an account after $t$ years with principal $P$ , simple annual interest rate $r$ , is given by $A = P (1 + r t)$ . Which equation correctly expresses the time $t$ in terms of $A$ , $P$ , and $r$ ?

A.

$t = \frac{A}{P} - \frac{1}{r}$

B.

$t = \frac{A - P}{P r}$

C.

$t = \frac{A - 1}{P r}$

D.

$t = A - P - r$