Section: Math

8) A blender's rotation rate slows down the more liquid that is added to it. From empty, it goes at around 1,275 rotations per second. The slowdown rate is three rotations per second less than four times the liquid's square height (represented as h). Which of the following equations best represents the appliance's rotation rate B(h)? 

1. 3-4h²
2. 1,275-(4-12h)
3. 1,275-(12h-3)
4. 1,275-(4h²-3)

1,275 represents the starting rotation rate. That will have to be reflected, so you can remove Answer 1. A closer reading of the question will dismiss Answers 2 and 3. Answer 4 is the only one to reflect 1,275 as the starting rotation as well as the reduction in speed -- 3 less (-3) than four times the liquid's square height (4h²), or -3+4h², which is the same as saying 4h²-3.