if a@b = a * b^(1/2) then 5@9 = ?
self made Choose one
A) 12  B) 16  C) 13  D) 15  E) 14
a@b = a * b^(1/2)   5@9 = 5*9^(1/2) = 5*3= 
<gadget id="calculator">5*3</gadget>
<output>15</output>
15   Correct Option: 15
<result>D</result>
if a@b = a * b^(1/2) then 5@9 = ?
self made