I understand calculus, I just don't understand how it is applied to solve these sorts of problems. 1. The problem statement, all variables and given/known data What is the smallest perimeter for a rectangle with an area of 16, and what are its dimensions? 2. Relevant equations A=L*W P=2W+2L 3. The attempt at a solution I managed to get the perimeter equation down to one variable like so: Area is 16. A=LW 16=LW 16/L=W P=2L+2(16/L) P=(2L2+32)/L and this is where I stop. I just don't see how this can be applied to the situation stated.