Posted by fatih on Tuesday, March 13, 2012 at 6:33pm.
√99.4 = √(100-.6)
The slope of y=√x is 1/2√x
at x=10, slope is .05
so, a linear approximation is
∆y/.6 = .05
∆y = .03
y-∆y = 10-.03 = 9.97
check: √99.4 = 9.96995
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