N* is defined as 0.5(N+10) for any number N. What is N, if ((N*)*)*=15?	Choose one
A) 20  B) 30  C) 40  D) 50  E) 60
N*=0.5(N+10)   (N*)*=0.5(0.5N+5+10)= 0.25N+7.5   ((N*)*)*=0.5(0.25N+7.5+10)= 0.125N+8.75   we know that ((N*)*)*=15   0.125N+8.75=15   0.125N=6.25   N= 6250/125= 
<gadget id="calculator">6250/125</gadget>
<output>50</output>
50   ANSWER:50
<result>D</result>
N* is defined as 0.5(N+10) for any number N. What is N, if ((N*)*)*=15?