Question

The population of a certain country since 1990 can be approximated by f(t)=0.008t2+2.1t+175 where f(t) is the population in millions and t represents the number of years since 1990. Find the average rate of change in the country's population between 1990 and 2010. Round to 1 decimal place.

Answer 1

Answer:

$\frac{f(20)-f(0)}{20-0} = \frac{220.2-175}{20} = 2.26$

Step-by-step explanation:

as with all functions f(t), the average rate of change on [a.b] is

$\frac{f(b)-f(a)}{b-a}$