What will be the difference after 15 years if the CD is compounded semiannually rather than quarterly?

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

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

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth