Posted by **Anonymous** on Thursday, February 24, 2011 at 1:47am.

Tamara invests $30,000 in an account earning 7% interest per year over the next 4 years.

How much (simple) interest will her investment earn in total?

- math -
**CJ**, Thursday, February 24, 2011 at 4:22am
the first thing you do is divide 30000 with 100:

300 = 1%

multiply it by seven to count the percentage

300x7 = 2100

multiply it by 4 to count the total via years

2100x4 = $8400

The answer is $8400 in total :)

- math -
**Helper**, Thursday, February 24, 2011 at 8:44am
I = PRT

(Interest, I = Principal, P * Rate, R * Time, T

P = 30,000

R = 7% = 0.07

T = 4

I = 30,000 * 0.07 * 4

I = 2100 * 4

I = 8400

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