Tina used `4\ \frac{1}{2}`liters of water to completely fill 3 water bottles. If the water bottles are all the same size, how many liters of water does each bottle hold? Which Equations can be used to represent the problem?

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?