Suppose that the average yearly cost per item for producing x items of a business product is C(x) = 13+300/x
If the current production is x=10 and production is increasing at a rate of 3 items per year, find the rate of change of the average cost. The average cost is decreasing at the rate of
per year.

can you rephrase the question ? it is unclear : -)

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well if you round, things become much more simple. round 5.95 to 6, 4.25 to 4, and 1.05 to 1. now, add 6+4+1 and that would equal 11. so the items together would equal to about $11.