For a given interest rate, simple interest varies jointly as the principal and time. if $3000 left in an account for 3 years earned interest of $540, then how much interest woukd be earned in 4 years?

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?