A metal cube dissolves in acid such that an edge of the cube decreases by 0.70 mm/min. How fast is the volume of the cube changing when the edge is 7.20 mm?

The volume is changing at a rate of ____ mm3/min.

The shadow of a 21-m high building is increasing at the rate of 16cm/min when the shadow is 23m long. How fast is the distance from the top of the building to the end of the shadowincreasing?

Let a=the length of theshadow, b=the height of thebuilding, and c=the distance from the top of the building to the end of the shadow. How can the distance between the building and the shadow befound?

A man 6.00 ft tall approaches a street light 18.0 ft above the ground at the rate of 7.00 ft/s. How fast is the end of theman's shadow moving when he is 13.0 ft from the base of thelight?

The end of theman's shadow is moving at a rate of ____ft/s.

(Round to two decimal places asneeded.)