[Video] Q4: The hardcover books produced by a publisher have pages that are 0.1 millimeter thick and a front cover and a back cover that each are 2 millimeters thick which of the following gives the total thickness f(n), in millimeters, of a closed book that has n pages?

Explanation for Question 4 From the Math (Calc) Section on the 2018 May Sat

Question four says the hardcover books produced by a publisher have pages that are 2 0.1 millimeter thick and a front cover and a back cover that each 3 are two millimeters thick, which of the following gives the total thickness in millimeters 4 of a closed book that has end pages. 5 So each page is 0.1 milliliters. 6 So we're going to have to multiply N by 0.1. 7 And then we have two milliliters of a front cover and two milliliters of 8 a back cover. And those together equal four millimeters. 9 And that's our final equation. 0.1 N plus four is equal to 10 FN, which is a answer choice, 11 a.