1.

At present, a firm is manufacturing 2000 items. Itis estimated that the rate of change of production P w.r.t. additional numberof workers x is given by `(d P)/(dx)=100-12sqrt(xdot)`If the firmemploys 25 more workers, then the new level of production of items is(1) 3000 (2)3500(3) 4500(4) 2500A. (a) 2500B. (b) 3000C. (c) 3500D. (d) 4500

Answer» Correct Answer - (c)
Given, `(dP)/dx=(100-12sqrtx) rArr dP=(100-12sqrtx)dx`
On integrating both sides, we get
`int dP=int (100-12sqrtx)dx`
`P=100x-8x^(3//2)+C`
When `x=0, then P=2000 rArr C=2000`
Now, when x=25, then is
`P=100xx25-8xx(25)^(3//1) +2000`
`=2500-8xx125+2000`
=4500-1000+3500


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