51 multiple ! !
in 1990,the population of a country was about 3.66 million people. by 2010, this number had grown to about 4.04 million people. what was the annual rate of change in population from 1990 to 2010?
f about 15,000 people per year
g about 19,000 people per year
h about 24,000 people per year
j about 38,000 people per year

Can someone me with this problem . show your work .

Solve 2x+y=3 x+y=5 in substitution method

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem