The formula for finding the approximate volume of a cylinder is v=3.14r^2h where r is the radius and h is the height. The height of a cylinder is 19.35 cm and the approximate volume is 3400cm^3. Find the radius of the cylinder to the nearest hundredth of a centimeter.

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.