Question 1149204
t = ln(A/P)/ln(1 + r) = [ln(A) - ln(P)]/ln(1 + r)
t = ln(27,000/7,000)/ln(1+0.03) = [ln(27,000 - ln(7,000]/ln(1+0.03)
t = [ln(27,000 - ln(7,000]/ln(1+0.03)
t = (10.2 - 8.85)/0.02956 
t = 45.67
--------------------------------------
Check:
7,000(1.03)^45.67 = 27,000.64 round to a whole number: 27,000
.
Happy learning