Concept explainers
Hearing-impaired Americans. The number N, in millions, of hearing-impaired Americans of age x can be approximated by the graph that follows.
Use the graph to answer the following.
a. Approximate the number of hearing-impaired Americans of ages 20, 40, 50, and 60.
b. For what ages is the number of hearing-impaired Americans approximately 4 million?
c. Estimate the age for which the greatest number of Americans is hearing-impaired.
d. What difficulty do you have in making this determination?
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Calculus and Its Applications (11th Edition)
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