Posted by **Tenshi** on Tuesday, April 29, 2014 at 8:45pm.

The marginal cost of manufacturing x yards of a certain fabric is

C'(x) = 3 − 0.01x + 0.000012x2

(in dollars per yard). Find the increase in cost if the production level is raised from 2000 yards to 4000 yards.

$186,000

- Calculus Help and Check -
**Damon**, Tuesday, April 29, 2014 at 8:58pm
calculate C' = dC/dx at x = 2000

then dC = C' dx

dC = C' (4000-2000)

C' = 3 - 20 + 40 = 23

dC = 23 (2000) = 46,000

- Calculus Help and Check -
**erik**, Friday, November 21, 2014 at 12:58am
58,000

- Calculus Help and Check -
**Zachary**, Wednesday, December 10, 2014 at 10:07pm
both answers are wrong

correct answer = $170,000

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