CK-12-Pre-Calculus Concepts

(Marvins-Underground-K-12) #1

13.1. Simple Interest http://www.ck12.org



  1. How much interest will a person earn if they invest $2,300 for 49 years at 3% simple interest?

  2. How long will it take $2,000 to grow to $5,000 at 3% simple interest?

  3. What starting balance grows to $12,000 in 8 years with 10% simple interest?

  4. Suppose you have $3,000 and want to have $35,000 in 25 years. What simple interest rate will you need?

  5. How long will it take $1,000 to grow to $4,000 at 8% simple interest?

  6. What starting balance grows to $9,500 in 4 years with 6.5% simple interest?

  7. Suppose you have $1,500 and want to have $8,000 in 15 years. What simple interest rate will you need?

  8. Suppose you have $800 and want to have $6,000 in 45 years. What simple interest rate will you need?

  9. What starting balance grows to $2,500 in 2 years with 1.5% simple interest?

  10. Suppose you invest $4,000 which earns 5% simple interest for the first 12 years and then 8% simple interest for
    the next 8 years. How much money will you have after 20 years?

  11. Suppose you invest $10,000 which earns 2% simple interest for the first 8 years and then 5% simple interest for
    the next 7 years. How much money will you have after 15 years?
    Principalis the amount initially deposited into the account.Notice the spelling is principal, not principle.
    Interestis the conversion of time into money.

Free download pdf