Use a calculator to work these exercises. (See Examples 1 and 2.)The number of passengers...

Use a calculator to work these exercises. (See Examples 1 and 2.)

The number of passengers enplaned (in millions) for the years 2000–2011 can be approximated by the function

f(x) = .377x4 − 9.23x3 + 71.4x2 − 163x + 666,

where x = 0 corresponds to the year 2000. Find the number of enplaned passengers in the following years. (Data from: Airlines for America.)

(a) 2004

(b) 2009

(c) 2010

Example 1

Finance If you were a single person in Connecticut in 2013 with a taxable income of x dollars and x ≤ $500,000 then your state income tax T was determined by the rule

Example 2

Suppose the projected sales (in thousands of dollars) of a small company over the next 10 years are approximated by the function