what is the least number. which should be added to 0.0478 to make it a perfect square?  Pick:
A) 0.0002
B) 0.0004
C) 0.0006
D) 0.0008
E) 0.001
0.0478+0.0006= 
<gadget id="calculator">0.0478+0.0006</gadget>
<output>0.0484</output>
0.0484   (0.22)^2   ANSWER:0.0006
<result>C</result>
what is the least number. which should be added to 0.0478 to make it a perfect square?