Ron has 5 new songs on his MP3 player. In how many different orders can he burn them to a CD?

Which expression is equivalent to 3^3 + 2^2?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?