Math
posted by Mike .
A=P(1+r)^2
A= interest
P= principle interest
r= interest rate
t= time in years
If $4500 invested at 7% interest compounded annually yeilds $15600, for how many years was the money invested?

Math 
PsyDAG
It would help if you proofread your questions before you posted them.
Where is "t" in your equation? 
Math 
Mike
People make mistakes. Calm down.
A=P(1+r)^t
A= interest
P= principle interest
r= interest rate
t= time in years
If $4500 invested at 7% interest compounded annually yeilds $15600, for how many years was the money invested?
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