a dentist is using a mirror which being 1.5 cm from a tooth creates a direct image of x 4.5 magnification. what is the radius of curvature of this mirror? give answer in cm.

Me to solve all the questions on the sheet attached

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.