Answer:
31 years
Step-by-step explanation:
we have to prepare two future value equations:
- FV = $8,000 x (1 + 0.0233)ⁿ
- FV = $2,000 x (1 + 0.07)ⁿ
next we must equal them:
$8,000 x (1 + 0.0233)ⁿ = $2,000 x (1 + 0.07)ⁿ
4 x (1 + 0.0233)ⁿ = (1 + 0.07)ⁿ
4 = 1.07ⁿ / 1.0233ⁿ = (1.07 / 1.0233)ⁿ
4 = 1.0456367ⁿ
log4 = n x log1.0456367
0.602 = n x 0.01938
n = 0.602 / 0.01938 = 31.06 ≈ 31 years