2. The surface area S(r) in square units of a cylinder with a volume of 18 cubic units is a function of its radius r in units where S(r) = 212 + . What is the surface area of a cylinder with a volume of 18 cubic units and a radius of 3 units?​

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

$12. that is my answer.

answer: 819.89 miles across america

step-by-step explanation:

moderators are