Derek is training for a half-marathon. His training plan sets his goal for this week at 18 miles with three short runs and one longer run. His three short runs total 9.35 miles.

How long will his long run need to be to meet his goal?

???miles

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.