ACT真題每日一練2.4

2016/02/04 瀏覽次數:4 收藏
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Math Question for Thursday, February 4th, 2016

A particle travels 1  108 centimeters per second in a straight line for 4  10–6seconds. How many centimeters has it traveled?

F. 2.5  102

G. 2.5  1013

H. 4  102

J. 4  10–14

K. 4  10–48

謎底:H

【剖析】The correct answer is H.

Using D = rt, D =  = 4  108 – 6 = 4  102 cm

 

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