One thousand raffle tickets are sold for $4 each. Three prizes will be awarded, one for $500 and two for $200. Assume the probability that any given ticket is selected for the $500 prize is 1/1000 and the probability that any given ticket is selected for a $200 prize is 2/1000. Winners do not have their ticket costs of $4 refunded to them. Jennifer purchases one of these tickets. Determine Jennifer’s expected value

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.