What is the height of a cylinder with a volume of 936x cubic inches and a diameter of 24 inches?
1.625 inches
4.75 inches
6.5 inches
39 inches

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

X+ y = 5 ; x - y =3 solve using linear combination

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?