How do i solve for r?
#A = 2pir^2 +2pirh#
1 Answer
Nov 11, 2017
Explanation:
We want to put this into a form that looks like:
because we can then use the quadratic formula to solve it. So let's go back to the question:
Notice that we can set:
#a=2pi# #b=2pih# #c=-A#
Now let's use the quadratic formula:
Substituting in: