ALGEBRA
posted by PHIL .
7300 @ 7% COMPOUNDED SEMIANNUALLY FOR 3 YRS

Use compound interest formula:
Amount = Principal * (rate)^n
rate=interest rate per period
n=number of periods compounded.
Here
rate = 1+ 0.07/2=1.035
number of periods = 3 years * 2 periods/yr
principal=$7300
The question didn't say what's required.