Point A is the pre-image of a vertex of a square and is located at (–10, 8). The square is dilated with the center of dilation at the origin. Point A’ is the image and is located at (–7.5, 6). What is the scale factor of the dilation?

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.