determine the function described and then use it to answer the question. the surface area A, of a cylinder in terms of its radius, r, and height,h, is given by A=2pi r^2+2pi rh. if the height of the cylinder is 4 feet, express the radius as a function of A.  r(A)=  find the radius if the surface area is 320 square feet. (round your answer to two deci,al places) _________ft

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Q: -/2

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Q: y varies directly as the square root of x. If x= 4 then y = 14. Find & when y = 56. X =

A: y varies directly as the square root of x