Question 133390
(20,851,820-16,985)/10=20,834,835/10=20,834,84 INCREASE PER YEAR BETWEEN 1990 & 2000.
AT THIS RATE THE NEXT 30 YEARS WILL BE:
20,851,820+30*20,834,835=20,851,820+625,045,050=645,896,870 ANSWER.