Pre Algebra

Describe the speed of the remote-control car over time.
A. The speed of the car decreases from 4 mi/h to 2 mi/h in the first 3 seconds, increases to 5 mi/h in the next 2 seconds, and then remains at 5 mi/h for the last 5 seconds.
B. The speed of the car increases from 4 mi/h to 2 mi/h in the first 3 seconds, decreases to 5 mi/h in the next 2 seconds, and then remains at 5 mi/h for the last 5 seconds.
C. The speed of the car decreases from 4 mi/h to 2 mi/h in the first 3 seconds, increases to 6 mi/h in the next second, and then remains at 6 mi/h for the last 6 seconds.
D. The speed of the car decreases from 4 mi/h to 2 mi/h in the first 3 seconds, increases to 5 mi/h in the next 5 seconds, and then remains at 5 mi/h for the last 10 seconds.

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asked by Summer
  1. all 4 choices describe possible movements. But you did not provide any indications of what the user was doing to control the car, or what the car was doing initially.

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    posted by Steve
  2. At 3 seconds, the car is going at 4 mi/h. At It takes the car 4 seconds to reach up to 6 miles per hour. This is what it gave me.

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    posted by Summer
  3. A,C,D all say the car decelerates. But, the speed increased from 4mi/hr to 6mi/hr, so only B is a logical choice.

    But B's language is all messed up. How can the speed increase from 4mi/hr to 2mi/hr? And then decrease to 5 mi/hr?

    And there seems to be some time missing.

    This whole problem needs some serious proofreading.

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    posted by Steve
  4. that is what is on my test. I cant tell you anything else because I don't have anything else

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    posted by Summer
  5. hahahaha !@#$%^& connexus

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