2. yes because 100m mulitplied by 50 is 500
2. Yes. I think so because 100m^2 * 50m^2 = $5000.
3. He has to pay about $417 ($416.67 to be exact) per month in order to pay it off in a year. If the deck costs him $5000, divide that by 12 and you get your answer.
