30 POINTS!!! You are riding a roller coaster when a shoe falls off your foot. The function y=76−16t^2 represents the height y (in feet) of the shoe t seconds after it falls off your foot. The shoe lands on the top of a 12-foot-tall building. After how many seconds does the shoe hit the building?

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.