Question

If f(x) represent the percent of American homes with computers and g(x) represent the number of American homes, with x equal to the number of years after 1990.

a. What function represents the number of American homes with computers, with x equal to the number of years after 1990?
b. Write the number of American homes with computers in 2015 using this function notation.

Answer 1

a. The number of American homes with computers after 1990 can be calculated by multiplying the number of American homes, g(x) with the percentage, f(x). The function is therefore,
                                    (g(x))(f(x)
b. There are 25 years between 1990 and 2015. So, the equation becomes,
                                    (g(25)(f(25))