The formula for the surface area of a cylinder with radius r and height h is at times twice the product of the radius and height plus twice the product of t and the square of the radius. Translate this verbal expression into
an algebraic expression.

f

step-by-step explanation:

f

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2