Concept explainers
Hearing-impaired Americans. The following graph (considered in Exercise Set R.1) approximates the number N, in millions, of hearing-impaired Americans who are x years old. The equation for this graph is
(Source: Better Hearing Institute)
a. Use the graph to determine the domain of N.
b. Use the graph to determine the range of N.
c. If you were marketing a new type of hearing aid, at what age group (expressed as a 10-yr interval) would you target advertisements? Why?
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Calculus and Its Applications (11th Edition)
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