Martha and Howard are running at a constant speed in a marathon. Martha runs at 4.5 mph. Howard’s progress is 5 miles an hour. Who runs faster? Explain your answer. If Martha and Howard are five hours in to the marathon, how far has each person ran?

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?