Use the Following to Answer Questions

question 127

Multiple Choice

Use the following to answer questions :
A driver going down a straight highway is traveling at 70 ft/sec on cruise control when he begins accelerating at a rate of 4.2 ft/sec². The final velocity of the car is given by the function , where V(t) is the velocity at time t.
-If the car is traveling at 100 ft/sec, for how long did it accelerate? (Round to the nearest tenth of a second.)

• A) 6.9 seconds
• B) 7.1 seconds
• C) 7.3 seconds
• D) 7.5 seconds

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Single word that conveys a complete thought.

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A word that has the same or nearly the same meaning as another word.

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A form of speech used by adults, characterized by a higher pitch and slower tempo, to communicate more effectively with infants.