if you ask for your name but dont give the people and way of getting to know the answer to this question their is no way we can guess unless out of plain luck next time think this through.
SOH,CAH, TOA so it would be TANGENT since it would be Opposite over Adjacent. Tan(15) = 9/a put Tan(15) onto your calculator it would be .267949 round that to .27 = 9/a cross multiply a = 33.588. C is the correct answer.
