A. Beyoncé uses cups of sugar for every 2 gallons of lemonade she makes. How many cups of sugar would she use if she made one gallon of lemonade? Thirteen gallons?

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?