- - - - - - - - -_straight ~ A bus is traveling at a constant speed along a d = 30t portion of road. The equation gives the distance d, in feet from a road marker, that the bus will be t seconds after passing the marker. How many feet from the marker will the bus be 2 seconds after passing the marker?
Correct answer: C (parsed from the explanation — this source omits an answer key for this item)
Explanation
Choice C is correct. It’s given that t represents the number of seconds after the =30 bus passes the marker. Substituting 2 for t in the given equation d t yields =30 2 =60 60 d ^ h, or d . Therefore, the bus will be feet from the marker 2 seconds after passing it. Choice A is incorrect. This is the distance, in feet, the bus will be from the marker 1 second, not 2 seconds, after passing it. Choice B is incorrect and may result from conceptual or calculation errors. Choice D is incorrect. This is the distance, in feet, the bus will be from the marker 3 seconds, not 2 seconds, after passing it.
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