Hi

how long will it take for money to double if it's 7% compounded quarterly

A= p(1+r/n) ^nt 

 2 = (1 + .07/4)^4t

 2 = (1.0175)^4t

log(2) = 4tlog(1.0175)

log(2)/log(1.0175) = 4t

    39.954 = 4t

     t = 9.9885 yrs   or basically, 10 years to double.

     

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