20. A carpenter is cutting wood to make a new bookcase with a board that is 12 feet long. If the carpenter cuts off three pieces, each of
which is 17 inches long, how many inches long is the remaining fourth and final board?
(A foot contains 12 inches.)

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?