Anybody got a PlayStation Network account?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?