4,235 in scientific notation

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?

Does 9q + 7 also equal 7 + 9q ? (simplifying algebraic expressions)

Find 1/8 of 12. express your answer in simplest form.