If x and y are positive integers, and x^3*y^4 = 648, which of the following is the value of xy?	Answers.
A) 6	B) 10	C) 14	D) 15	E) 21
648 = 2*324 = 2^2*162 = 2^3*81 = 2^3*3^4   xy = 2*3= 
<gadget id="calculator">2*3</gadget>
<output>6</output>
6   The answer is 6.
<result>A</result>
If x and y are positive integers, and x^3*y^4 = 648, which of the following is the value of xy?