Answer
834 dollars
Work Step by Step
The compound interest formula is A=P (1+ $\frac{r}{n}$$)^{nt}$.
P=400
R=0.0525 (5.25%)
N=1
T=10
Substitute:
A=500 (1+ $\frac{0.0525}{1}$$)^{(1)(10)t}$. -simplify-
A=500 (1.0525$)^{10}$.
A=$834
After 10 years there would be 834 dollars
