Final answer:
Donna would have to invest $68,745.12 to have $142,300 after 17 years with an interest rate of 3.45% compounded quarterly.
Step-by-step explanation:
To calculate the amount Donna would have to invest, we can use the formula for compound interest:
A = P(1 + r/n)^(nt)
Where:
- A is the final amount (in this case, $142,300)
- P is the principal amount (what Donna needs to invest)
- r is the annual interest rate (3.45%, or 0.0345)
- n is the number of times interest is compounded per year (quarterly, so 4)
- t is the number of years (17)
Plugging in the values, we get:
142,300 = P(1 + 0.0345/4)^(4 * 17)
Simplifying, we find that Donna would have to invest approximately $68,745.12 to have $142,300 after 17 years with an interest rate of 3.45% compounded quarterly.