If 6^k = 4, then 6^(2k+3) =	Choose one.
A) 2925	B) 3456	C) 4581	D) 3683	E) 1308
6^k=4   6^2k=4^2   6^2k=16   6^(2k+3)   =6^2k*6^3   =16*216= 
<gadget id="calculator">16*216</gadget>
<output>3_456</output>
3456   Answer: 3456
<result>B</result>
If 6^k = 4, then 6^(2k+3) =