Which rational expression is equal to a positive whole number when evaluated? a.)2^1/2 b.)8^1/3 c.)12^1/4 d.)15^1/5

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?