The Function Given Below Gives the Cost to Manufacture X $h = 0.0001$

Short Answer

The function given below gives the cost to manufacture x items. Estimate (using $h = 0.0001$ ) the instantaneous rate of change of the cost at the production level $x = 500$ .
​ $C ( x ) = 9,500 + 5 x - \frac { x ^ { 2 } } { 10,000 }$ ​
Enter your answer as a number without the units rounded to the nearest tenth.