Taryn used 2 cups of salt to make 4 cups of homemade playdough. Which proportion can be used to calculate how many cups of salt Taryn needs to make 12 cups of playdough?

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