SAT考试9月每日精选题10

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Mathematics>Standard Multiple Choice

Read the following sat test question and thenclick on a button to select your answer.

v=152-9.8t

A volcanologist modeling a volcanic eruptiondetermines that vertical velocity, v, in meters per second (m/s), of the debris reaching thehighest altitude t seconds after the eruption can be given by the equation above. Which ofthe following is the best interpretation of 152 in this context?

A.The velocity changed by 152 m/s every second.

B.The highest altitude reached by debris was 152 meters.

C.The debris hit the ground 152 seconds after the eruption.

D.The debris had a vertical velocity of 152 m/s at the time of eruption.

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答案：B

解析：

Choice D is correct.

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