On a business trip, Ms. Rupp drove 4.25 hr on Monday, 6.75 hr on Tuesday, 5.5 hr on Wednesday, 7 hr on Thursday, and 6.75 hr on Friday. What is the total number of hours that Ms. Rupp drove ?

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?