<PRE><B>Question 208087</B>
T(x) = 510/x+55 + 230/x+70 


If all you need is T(0), then you did NOT need to do all those steps!  In the original expression, substitute x=0, and you get 

T(0) = 510/(0+55) + 230/(0+70)
T(0) = 510/55 +230/70 


Use a calculator and I get 12.558, which rounds up to 13. 


R^2


Dr. Robert J. Rapalje 
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