Question 1178164
2300=1200(1.0175)^4t
divide through by 1200 
1.916667=1.0175^4t
take ln both sides
0.65059=4t ln 1.0175
0.65059/ln1.0175=4t=37.50 
that is t=9.375 years or 9.38 years.

the key is remembering that the ln of (x)^b = b ln x.