Concept explainers
a. Use a formula to express the altitude of a helicopter as a function of time. Be sure to explain the meaning of the letters you choose and the units.
b. Express using functional notation the altitude of the helicopter 90 seconds after takeoff, and then calculate that value.
c. Make a graph of altitude versus time covering the first 3 minutes of the flight. Explain how the description of the function is reflected in the shape of the graph.
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