The following table shows the amount spent by four U.S. airlines to fly one available seat 1 mile in the second quarter of 2014. Set up a system and then solve using technology.

Suppose that, on a 3,000-mile New York to Los Angeles flight, United Continental, American, and Southwest flew a total of 210 empty seats, costing them a total of $89,760. If United Continental had three times as many empty seats as American, how many empty seats did each of these three airlines carry on its flight?

United Continental _________empty seats

American ____________ empty seats

Southwest ___________empty seats

Question 2:

Find the present value PV of the given investment (in dollars). (Round your answer to the nearest cent.)

An investment earns 4% per year and is worth $30,000 after 3 years.

Question 3:

Calculate, to the nearest cent, the future value FV (in dollars) of an investment of $10,000 at the stated interest rate after the stated amount of time.

3% per year, compounded quarterly (4 times/year), after 7 years

\begin{tabular}{|c|c|c|c|c|} \hline Airline & UnitedContinental & American & JetBlue & Southwest \\ \hline Cost (c) & 14.9 & 14.6 & 11.9 & 12.4 \\ \hline \end{tabular}