M3 Rational Exponents matching

Answer this question only if you know the 30 points and

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny