Select 90 students currently enrolled at NCSU and ask how many years they’ve attended the university, how old they are, and if they live on campus.

a. What is the population?

b. What is the sample?

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?