[填空题]
Alex invests an amount of USD into a savings accxk2kq1t w6+m.9a07tr3fadm0wf jwsp ; 7dt riount which pays 3.3% (p.a.) intv j1l75cri s:oerest, compounded monthly. After 5 years Ao:ls7v5rjc1 i lex has 8000 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= .
