What is the unit rate of when it cost $24.75 for 5.5 pounds of hamburger? Using your answer form the first question? What will 10.75 pounds cost

Can y’all answer both hurry too !!

The bottom of ignacio's desktop is 74.5cm from the floor. ignacio's 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