Let {x1(t), t ≥ 0} and {x2(t), t ≥ 0} be independent poisson processes with common intensity λ. suppose that x1(3) = 9 and x2(3) = 5. what is the probability that the x1-process reaches level 10 before the x2-process does?

The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?