Need

use the model below to estimate the average annual growth rate of a certain country's population for 1950, 1988, and 2010, where x is the number of years after 1900.

y=-0.89x^3+0.00248x^2-0.154x+8.366< br />
the estimated average annual growth rate of the country's population for 1950 is
(round to three decimal places as needed.)