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Home > PC > Chapter 9 > Lesson 9.3.4 > Problem 9-144

9-144.
  1. Remember our toy car with distance function d(t) = 10t2? Remember to label your answers with the proper units. Homework Help ✎

    1. Find the velocity of the car at 1 second, that is, find d ′(1).

    2. Find the velocity of the car at 3 seconds, or d ′(3).

    3. Find the velocity of the car at s seconds for any fixed time s, or d ′(s).

Find the slope function.

Substitute t = 1 into the slope function.

Substitute t = 3 into the slope function.

Substitute t = s into the slope function.