if 3 ^ x * 4 ^ y = 19683 and x – y = 9 , then x = ?	Pick:  A) 8  B) 9  C) 10  D) 11  E) 12

Rationale: since 19,683 is an odd number , it is not a multiple of 4 . this means that y must equal zero . since x - y = 9 and y = 0 , then x = 9 . the answer is b .
Answer: B