Answer:
Their income after 20 years would be 72,550 dollars.
Step-by-step explanation:
The income after 20 years can easily de determin by using compounding
formula
Future Value = Present Value (1 + I)^ 20
= 90,000 (1 + 0.03)^ 20
= 162,550 dollars
Income can be determing by subtracting Pv from Fv i.e
Income = 162,550 - 90,000 = 72,550
Calculation on excel sheet
A B C D
1 90,000 1.03 = A1 * 1.03 = C1-A1
2 = D1 1.03 = A2 * 1.03 = C2-A2
20 = D19 1.03 = A20 * 1.03 = A20 - C20
* In work sheet colunm D will show income on investment.