How long will it take for money to double at 4 1/2% compounded quarterly?

Answer 1

2 = (1 + 0.045/4)^4t

2 = (1.01125)^4t

ln 2 = (4t)(ln 1.01125)

0.693154718 = 4(0.011187189)t

0.693154718 = 0.044748757t

15.48992097 = t