If the ratio of printers to employees is 1 to 15 and there are 45 employees, how many printers are there? Express your answer as a fraction. Do not include units in your answer.

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?