Two trains travel in opposite directions, one is northbound and one southbound, leaving memphis at the same time. the northbound train travels 55mph and the southbound travels 45mph. in how many hours will the trains be 150 miles apart.

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?