Long-term interest rates in Australia are 3.5% per year. If you invest $2,000 in Australia, and interest is compounded quarterly, how long will it take for your investment to reach $6,000? Use logarithms to give the exact value and then round your value to 2-decimal places (e.g., you might give ln(2) for the exact value and 0.69 as the rounded value). 

Do work on a piece of paper and then scan to a pdf file (Use CamScanner for example) and upload your file as your answer to this question.