Find the simplified quotient. which of the three options is it?

Find the value of the variable and the length of each secant segment

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?