For the data set shown in the dot plot below, which of the following is closest to its population standard deviation?
(1) 2.7
(3) 3.3
(2) 4.2
(4) 5.8
0
5
10
15

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

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

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?