SOLUTION: Consider solving the following formula for the variable r. See Example 4. (Objective 2) A = 2𝜋r2 + 2𝜋hr (the formula for the surface area of a right circular cylinder) Wri

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Consider solving the following formula for the variable r. See Example 4. (Objective 2) A = 2𝜋r2 + 2𝜋hr (the formula for the surface area of a right circular cylinder) Wri      Log On


   

Question 1169381: Consider solving the following formula for the variable r. See Example 4. (Objective 2)
A = 2𝜋r2 + 2𝜋hr
(the formula for the surface area of a right circular cylinder)
Write the formula in
ar2 + br + c = 0
form with
a > 0.
1. = 0
Identify the values a, b, and c.
2.a =

3.b =

4.c =

Solve the formula for r. (Enter your answers as a comma-separated list.)
5. r =


Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
What exactly do you need help with? Note, quadratic equation in r. Also assume h, A, both positive real numbers.