A1 liter jar is filled with water right to the top. a rock is then dropped in the jar and 400 ml of water is displaced (pushed out). what is the volume of the rock?

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?