Answer:
its a
Step-by-step explanation:
a x 4 = a^4
b^3 x 4 = b^12
The formula for compound interest is : A = P(1+r/n)^nt
A = 4000 (1+0.021/4)^4x4
A = 4000 (1.021)^16
A = 5,577.91
Sergio's total interest would be : 5,577.91 - 4,000 = $ 1,577.91
hope this helps
Answer:
90
Step-by-step explanation:
