Explanation for Question 34 From the Math (Calc) Section on the 2019 May Sat
So question 34 says a baker is gathering the ingredients required to make 2 15 batches of oatmeal cookies. And one cake, 3 the cake will require one quarter bag of flour. 4 The baker needs a total of more than three, 5 but less than four bags of flour. What is one possible value for the 6 fraction of one bag of flour required for each batch of cookies? 7 So first, what we have to do is we need to take the total 8 amount of flour needed and subtract the amount needed for the cake. 9 So since we need more than three, 10 but less than four bags of flour in total, 11 and a quarter of a bag is being used for the cake. 12 That means that the amount of flour needed for the cookies is between two 13 and three fourths and three. 14 And three-fourths not including those two values. 15 And I got that information by taking three and subtracting one quarter to get 16 the lower bound and taking four and subtracting one quarter to get the higher 17 bound. Now that I have that I can choose any number between two and 18 three fourths and three and three fours. 19 And I can use that in this problem. And I know that because the 20 question says, what is one possible value? 21 Which tells me that there isn't just one answer I'm going to have to 22 pick from a range. So I'm going to choose three, 23 just because that's the most even number in this range. 24 Um, and I'm going to say that it takes three bags of flour to 25 make 15 cookies. 26 So three bags of flour to make 15 cookies, 27 which if you want to find how much it takes to make one batch 28 of cookies, then you just have to divide both sides by 15. 29 Then you'll find that one cookie takes one fifth 30 of a bag of flour. 31 And that's what the answer is. One fifth.