Question

Use of the Internet in a country is given by the function f(x)=0.485x^2 - 1.694x+0.315, where the output is in millions of users. In this formula x=6 corresponds to 1996, x=7 corresponds to 1997, and so on until x=20 corresponds to 2010. Estimate when the number of Internet users in the country reached 144 million.

Answer 1

use 144 = 0.485x^2 - 1.694x+0.315
solve using quadratic formula

Answer 2

Thank you

Answer 3

you are welcome