Can someone please help me understand ?

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One model for the number of students enrolled in U.S. public high schools as a function of time since 1986 is the formula below.

N = 0.05t2 − 0.42t + 12.33

Here N is the enrollment in millions of students, t is the time in years since 1986, and the model is relevant from 1986 to 1996.

(a) Use functional notation to express the number of students enrolled in U.S. public high schools in the year 1988.
N )

Calculate that value. (Round your answer to one decimal place.)

million students

(b) Explain in practical terms what N(6) means.

Oct 3rd, 2015

Thank you for the opportunity to help you with your question!

Thank you for the opportunity to help you with your question!

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$N = 0.05t^2-0.42t+12.33$

(a)

t is the time in years since 1986

For the year 1988, t = 1988 - 1986 = 2

So functional notation is N(2).

$N(2) = 0.05\times2^2-0.42\times2+12.33=11.69\approx11.7$ million students

(b)

N(6) means number of students enrolled in U.S. public high schools in the year (1986 + 6 =)1992.

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Please let me know if you need any clarification. I'm always happy to answer your questions.Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 21st, 2015

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Oct 3rd, 2015
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Oct 3rd, 2015
Oct 17th, 2017
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