a scientist wants to know whether frogs grow at the same rate in shaded water and in sunny water. which princple of expermental design can the scientist best use to include a varitey of frogs in both the shaded and sunny treatment group of the study

12x + 1 = 25 solve the following equation. then place the correct number in the box provided.

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

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?