sat数学真题:Standard Multiple Choice

今天上海新航道 小编为大家带来的是关于sat数学的真题，本题是一道标准选择题。

题目：

35A+28P=250

Vera is hiring entertainers for her charity event. She uses the equation above to determinethe number of hours, A and P, for which to hire a caricature artist and a face painter,respectively, with a total budgeted cost of $250. The caricature artist charges $35 per hourand the face painter charges $28 per hour. What is the meaning of the 35A in this equation?

A.The caricature artist charges 35A dollars per hour.

B.The caricature artist works for a minimum of 35A hours at the charity event.

C.For the first 35 hours of the charity event, the caricature artist will make A dollars.

D.The caricature artist charges a total of 35A dollars for A hours worked.

答案：D

解析：

Choice D is correct. Since A and P represent numbers of hours, use units to help determinethe meaning of the expression:

35A = 35(dollars/hour)*A hours = 35A dollars

This equation shows that the caricature artist charges $35 for each of the A hours worked,which is a total of 35A dollars for all of the A hours worked.