The surface area of a sphere is given by the equation = 32 + 48 , where x is the radius of sphere. If the surface area changes at the rate of 18π cm2 s -1 , find the rate of change in radius when the radius is 4 cm.​

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?