At What Annual (Simple Interest) Rate Did the Population of Some

Multiple Choice

At what annual (simple interest) rate did the population of some county increase from 1970 to 2000 Round your answer to one decimal place.

A) $r = 4.0 \%$
B) $r = 3.8 \%$
C) $r = 2.8 \%$
D) $r = 2.3 \%$
E) $r = 4.9 \%$