单项选择题

Andrew fitted an electric toy car with hard rubber wheels that had deep treads and placed the car on a smooth, flat surface. Andrew started the car and a stopwatch at the same time. Andrew stopped the stopwatch as the car crossed the 75-foot mark. He calculated the results of 3 separate trials as shown in the table below.

Andrew repeated the procedure, except he fitted the car with soft rubber wheels that were smooth and lacked treads. The results are shown in the table below.

During which procedure and trial did the car travel at the highest speed？（）

A．Procedure 1, Trial 1
B．Procedure 1, Trial 2
C．Procedure 1, Trial 3
D．Procedure 2, Trial 1
E．Procedure 2, Trial 3

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单项选择题
Assuming that the car traveled at a constant speed, approximately how far had the car with hard wheels traveled in Trial 3 after 11.25 seconds？（）

A．22.5 feet
B．37.5 feet
C．75.0 feet
D．253.125 feet
E．Not enough information is given.
单项选择题
In the figure above, a square is circumscribed about a circle with a diameter of 20 cm. Points Q, R, S, and T are the midpoints of the square’s sides. What is the total area, in cm2, of the square？
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