Emma used 7/8 of a barrel of apples to make apple ples. when Emma finished she had 1/6 of a barrel of apples left. does the diagram below correctly show how many apples used? if not explain why the diagram is in correct and what the correct answer should be ? ​

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?