[填空题]
Alex invests an amount +oy2sh7pc am2(ddduf-i w* (sof USdv6trml5z2u/d5h9jxlo9 v e9D into a savings account which pays 3.3% (p.a.) interest, compounded monthly. After 5 years Alex has 8 z l9oe9mvdr6/th u55l2d9 xvj000 USD in the account.
1.Find the amount of USD initially invested, rounding your answer to two decimal places.
With this money, Alex purchases a used car for 5000 dollars, and sells it 3 years later for 4200.
2.Find the rate at which the car depreciates per year over the 3 year period.
We can use the compound depreciation formula to solve for r= .
