Chapter A.6, Problem 130AYU

To determine

To find: Some formulas that occur in applications. Solve each formula for the indicated variable. $A=P\left(1+rt\right)$ for $r$.

Answer to Problem 130AYU

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

Explanation of Solution

$A=P\left(1+rt\right)$

$A=P+Prt$

$A-P=Prt$

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

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