Read the following SAT test question and then click on a button to select your answer.
8月SAT数学官方Daily Practice 每日一练,点击
Davi will use 44 linear feet of wood to make a frame for a rectangular sandbox. The area, A, of the sandbox is given by the equation below where w is the width of the sandbox.
A(w)=22w-w²
What is the largest possible area, in square feet, that Davi can create with this piece of wood?
A.11
B.22
C.110
D.121
重点单词:
rectangular [rek'tæŋgjulə] n. 矩形
frame [freim] n. 框,结构,骨架v. 构成,把 ...
multiple ['mʌltipl] adj. 许多,多种多样的n. 倍数,并联
equation [i'kweiʃən] n. 相等,方程(式), 等式,均衡
答案:D
解析:
Choice D is correct.
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