Jack and Jill need to save $8300 toward a new car. How long will it take them if they save $340 a month earning interest at 4.7% per year? (Treat as an ordinary annuity.) (State your answer in years rounded to the second decimal place, e.g., 12.34)

What would be the sum of all the payments made (i.e., total $s paid over the 30 years, ignoring time value) on the following house mortgage? Loan amount is $245,000 with an interest rate of 7.1% per annum, term of 30 years, and monthly payments. (Round to nearest penny and enter, for example, as 123456.78)

How much must we invest at the end of each month to build a balance of $620,000 over 11 years if we earn 13% per annum? (Round to nearest penny and enter, for example, as 123456.78)