<PRE><B>Question 148395</B>
                            
By  proprotional intercept property,  DB / AB = EC / AC 
              AB = AD + DB = 4 + 5 = 9 

   SUBSTITUTING THE GIVEN VALUES

                              5 /9 = 7 / AC
                            AC = (9 * 7 ) / 5 

                               = 63 / 5 = 12.6 


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