Question

the formula for the total surface area of a cylinder is S=2pir^2 + 2pirh. Explain how you could use the distributive property to write the formula in another way

Answer 1

You undistribute like
ab+ac=a(b+c) so

2pir^2+2pirh=(2pir)(r)+(2pir)(h)=2pir(r+h)