March 2nd, 2012, 09:34 AM  #1 
Senior Member Joined: Feb 2012 Posts: 110 Thanks: 0  Finding the minimum average cost
The total cost, in dollars, of producing x cell phones is approximated by the function C(x)= 200030x+x^/5 Find the minimum average cost. Thank you for your help 
March 2nd, 2012, 09:39 AM  #2 
Senior Member Joined: Feb 2012 Posts: 628 Thanks: 1  Re: Finding the minimum average cost
I'm assuming that equation is supposed to be . Then the average cost is . Caclulate the derivative of this function, set it equal to zero, and plug the result back into the average cost equation to get your answer. 
March 2nd, 2012, 09:44 AM  #3 
Senior Member Joined: Feb 2012 Posts: 110 Thanks: 0  Re: Finding the minimum average cost
thanks iceman


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