SOLUTION: The number N, in millions, of hearing impaired individuals of age x can be approximated by: N = -0.00006x^3 + 0.006x^2 - 0.1x + 1.3 Approximate to the nearest million the num

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Question 124539: The number N, in millions, of hearing impaired individuals of age x can be approximated by:
N = -0.00006x^3 + 0.006x^2 - 0.1x + 1.3
Approximate to the nearest million the number of hearing impaired individuals of ages 50 - 60.
N = (squiggly lines) ___________ million individuals of age 50.
N = (squiggly lines) ___________ million individuals of age 60.
Please help, I submitted this yesterday and noone seemed to have answered. I tried calculating and kept coming up with 0 and that can't be the answer.
Thank you!
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
N+=+-0.00006x%5E3%2B0.006x%5E2-0.1x%2B1.3 Substitute x = 50
N+=+-0.00006%2850%29%5E3%2B0.006%2850%29%5E2-0.1%2850%29%2B1.3
N+=+-7.5%2B15-5%2B1.3
N+=+3.8 round to the nearest million...
N+=+4Million, approximately.
N+=+-0.00006x%5E3%2B0.006x%5E2-0.1x%2B1.3 Substitute x = 60
N+=+-0.00006%2860%29%5E3%2B0.006%2860%29%5E2-0.1%2860%29%2B1.3
N+=+-12.96%2B21.6-6%2B1.3
N+=+3.94 Round to the nearest million...
N+=+4Million, approximately.