Rich has a bag of 24 markers. Each marker is 20 centimeters long. What is the combined length of the marker in meters?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your