The price Renu pays to visit the vet's clinic is calculated according to the formula 30 + 60n. Here n is the number of times she visits him in a year. This time it was 2. What was the cost of his visit?

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?