For a statistics project, Lauren distributed a questionnaire and asked her classmates to fill it out. 2 of them did. Is this sample of the students in the class likely to be representative? Yes or no

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?