Jordan went swimming for 78 hour in the morning and 56 hour in the afternoon. What is the best estimate for the total time Jordan went swimming?

​78​hour is closest to . 56​hour is closest to . Therefore, the best estimate for the total time Jordan went swimming is close to .

A: 0 hours
B: 1/2 hours
C: 1 hour
D: 2 hours
E: 3 hours

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