单项选择题

Rectangular region QRST is divided into four smaller rectangular regions, each with length l and width w.（）

A. if Quantity A is greater;
B. if Quantity B is greater;
C. if the two quantities are equal;
D. if you cannot determine the relationship based on the given information.

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单项选择题

For a project, a square piece of cloth is folded in half and sewed together to form a rectangle that has a perimeter of 36 centimeters. What was the area in square centimeters of the piece of cloth before it was folded

A. 16
B. 36
C. 81
D. 108
E. 144

单项选择题

The average (arithmetic mean) number of trees per acre in a 40-acre plot is 140. If a 10-acre section of the plot contains 90 trees per acre, how many trees are there in the remaining 30 acres

A. 5,700
B. 4,700
C. 4,200
D. 3,600
E. 2,700