Briana bought 3 pairs of boots with a regular price of b dollars and 6 pairs of socks with a regular price of s dollars. She used a 30%­off coupon. Write an expression that shows how much money Briana spent in all. Then expand the expression.

An observer(o) spots a plane(p) taking off from a local airport and flying at a 29 degree angle horizontal to her line of sight and located directly above a tower(t). the observer also notices a bird circling directly above her. if the distance from the plane(p) to the tower(t) is 6,000ft., how far is the bird(b) from the plane(p).