Answer:
for 18 i got $28 100×.04×7
and for 19 i got $348.92
300(1+.051 or [5.1/100] /2)to the power of 6 or [3×2]
Explanation:
Simple interest is Principal × Rate ×Time but you turn the rate into a decimal
Compounded interest is (F)inal (V)alue(1+(r)ate/(n)umber of times interest is compounded) to the power of (N×T)ime