## Helly 3 years ago Mitchell deposited $651.37 in a savings account that earns 3.9% simple interest. What is Mitchell’s account balance after 15 years? • This Question is Closed 1. Helly I need help on this i honestly don't even understand anything that is happening in this class please help me!(O.O) 2. campbell_st use the formula I = Prn P = principal ( amount invested)$651.37 r = interest rate as a decimal 3.9% = 0.039 n = number of time periods 15 just substitute andevaluate for an answer.

3. Helly

Thank you so much =D i got 381

4. campbell_st

I think you may need to include the 5 cents in the answer $381.05 this is the interest the account balance will be the Principal + Interest 5. Helly yeah i did=D Thanks 6. Helly oh it this the same way Stacey currently has an account balance of$1,007.78. Her initial deposit on the account was \$616 and it earned 5.3% simple interest. How long has Stacey held the account?

7. campbell_st

so in this question you need to find the interest 1007.78 - 616 = 391.78 when you know the interest I you need to formula I = Prn or 391.78 = 616 * 0.053* n you need to solve for n

8. Helly

31 years?=D

9. campbell_st

ummm the question becomes $\frac{391.78}{(616 \times 0.053)} =$

10. Helly

oh ok 12 years!=D