What is the surface area of a cylinder that has the following measurements:
radius - 8
height - 9

For a cylinder, the equation to finding the surface area is: 
2*3.14r^2 + 2*3.14rh
R = radius
H =height

So, if you replace the r and h with the numbers you should get this equation:
2*3.14*8^2 + 2*3.14*8*9

So, once we solve this our final answer should be:
854.08 in^2
Hope this helps!

What shegxld said is indeed correct!
Have a day :D

The solution is x = 13