Problema Solution
The number N, in millions, of hearing impaired individuals of age xcan be approximated by N=-0.00006x^3+0.006x^2-0.1x+1.4. Approximate to the nearest million the number of hearing impaired individuals of ages 40 and 55.
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The number N, in millions, of hearing impaired individuals of age xcan be approximated by N=-0.00006x^3+0.006x^2-0.1x+1.4. Approximate to the nearest million the number of hearing impaired individuals of ages 40 and 55.
N=-0.00006x^3+0.006x^2-0.1x+1.4.
N(40)=N=-0.00006-40^3+0.006*40^2-0.1*40+1.4
=-3.84+9.6-4+1.4
=3.16.
=14.84.
N(55)=-0.00006-55^3+0.006*55^2-0.1*55+1.4
=9.9825+18.15-5.5+1.4
=4.0675.