If 4^k = 5, then 4^(2k+2) =	Choose the correct choice from the following answers:
A) 400
B) 540
C) 100
D) 830
E) 420
4^k=5   4^2k=5^2   4^2k=25   4^(2k+2)   =4^2k*4^2   =25*16= 
<gadget id="calculator">25*16</gadget>
<output>400</output>
400   400nswer: 400
<result>A</result>
If 4^k = 5, then 4^(2k+2) =