Final answer:
The size of the quarterly deposits is $470.50.
Step-by-step explanation:
To find the size of the quarterly deposits, we can use the formula for the future value of an ordinary annuity:
FV = P * ((1 + r/n)^(n*t) - 1) / (r/n)
Where FV is the future value, P is the quarterly deposit, r is the annual interest rate (3.75% = 0.0375), n is the number of compounding periods per year (12), and t is the number of years (9).
Plugging in the given values, we have: $50,000 = P * ((1 + 0.0375/12)^(12*9) - 1) / (0.0375/12)
Simplifying the equation and solving for P, we find that the size of the quarterly deposits is $470.50 (approximately).