If x and y are positive integers, and x^3*y^4 = 16,000 which of the following is the value of xy?  Choices.
A) 10
B) 12
C) 15
D) 16
E) 20
16,000 = 10^3*2^4   xy = 10*2= 
<gadget id="calculator">10*2</gadget>
<output>20</output>
20   The answer is 20.
<result>E</result>
If x and y are positive integers, and x^3*y^4 = 16,000 which of the following is the value of xy?