Explanation for Question 9 From the Math (No Calc) Section on the 2018 April Sat
Question nine says the formula above is used to estimate the ideal quantity 2 queue of items. A store manager needs to order given the demand quantity 3 D the set of costs per order K, 4 and the storage cost per item, H which of the following correctly expresses 5 the storage costs per item in terms of the other variables. 6 So this question is asking us to take this original equation and to 7 put it in terms of H so I'm going to start by just rewriting 8 the equation itself. So Q is equal to two 9 D K over H maximum is square, 10 both sides. So Q squared is equal to two, 11 the K over H next I'm going to multiply both sides by 12 H to get H Q squared is equal to two 13 D K, and then I'm going to divide both sides by Q squared to 14 get H is equal to two D K, 15 over Q squared. 16 And that's my final answer. So I know that the correct answer here is 17 C.