The PTA bought several boxes of
cookies to serve as refreshments at the
school play. The first kind of cookie
came in boxes of 20 and the second
kind came in boxes of 30. The PTA
bought 8 boxes of each kind of cookie.
Use the Distributive Property to write
two expressions for finding the total
number of cookies. Then find the total
number.

Among the most famous of all meteor showers are the perseids, which occur each year in early august. in some areas the frequency of visible perseids can be as high as 40 per hour. given that such sightings are poisson events, calculate the probability that an observer who has just seen a meteor will have to wait at least five minutes before seeing another.