Could anyone help me solve these tables? I'm genuinely confused and grades are due tomorrow.

Me with this one question, and i'll upvote the brainliest answer

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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).