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February 6, 2016
Posted by **Ruby** on Friday, October 26, 2012 at 11:28am.

- college calc -
**Reiny**, Friday, October 26, 2012 at 12:36pmy = x^(1/2)

dy/dx = (1/2)x^(-1/2)

dy = 1/(2√x) dx

when x = 64, dx = .3

dy = (1/2√64)(.3) = (1/16)(.3) = appr .01875

**so √64.3 = 8.01875**

actual √64.3 by calculator = 8.018729

error is .000022