Lightning lucy's burnable cds are on sale this month for 10% off regular prices. if a pack of 10 blank cds normally costs $15, how much do you save per cd?

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?