Abag contains 3 white marbles and 6 black marbles. you pick out a marble, record its color, and put the marble back in the bag. if you repeat this process 36 times, how many times would you expect to remove a black marble from the bag?

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.