The question is, The steps you follow to maximize a quantity are the same as the steps to minimize a quantity, explain why? Im not sure why??? I know to maximize or minimize a quantity, you find the derivative, let it equal 0 and solve to find the value of the variable that results in a maximum or minimum, then you find the maximum or minimum value (if required) by substitution, then check to see you have the maximum or minimum by test-second derivative if >0 then min, if <0 max. Can any one please explain to me why??? THANKS SOO MUCH!