Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels." When you want to check your work, you can turn to the solutions at the end. If you aren’t familiar with some of the mathematical concepts, make a note to pay particular attention to that chapter in this book; this practice set covers a wide range of topics tested on the GMAT.
On all data sufficiency problems, the answer choices are the same (as you’ve learned). We’ve put them here for your reference.
Ａ. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Ｂ. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
Ｃ. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
Ｄ. EACH statement ALONE is sufficient.
Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient.

What is the value of f²-g²
(1) f=-g+8
(2) f=g-2

某科研楼高22.8m，共有六层，每层建筑面积960m²，设有空气调节系统，一层、二层安装有特殊重要的科研设备，三层为计算机中心机房。四层以上为办公室。

该科研楼室内消火栓用水量应为（）。

A.5L/s

B.10L/s

C.15L/s

D.20L/s