中等MATH-NUMB-005
$5000 is invested at 4% per annum, compounded yearly, for 3 years. Which expression gives the amount?
A. 5000(1.04)^3✓ 答案
B. 5000 × 1.04 × 3
C. 5000 + 5000 × 0.04 × 3
D. 5000(1.4)^3
解說
Compound interest multiplies by the growth factor once each year, so the amount is 5000(1.04)^3. The third option is simple interest. 1.4 would be a 40% rate.