Ali and Ava are driving to a city that is 120 miles from their house. They have already traveled 20 miles, and they are driving at a constant rate of 50mi/h. Write a function that models the distance they drive as a function of time.

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.