Question: Today, your investment account has a balance of $3,000. Exactly one year ago you made a onetime deposit into the account.
a. Exactly, how much did you invest one year ago if the investment account pays a 7.5 APR compounded semi-annually?
b. Instead, suppose you made one deposit exactly 6 months ago and another, equally sized deposit, today. What was the dollar amount of each deposit if you have exactly $3,000 dollars in your account today and the account pays a 7.5 APR compounded semi-annually?