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8)Determine the intervals on which the function f(x) = 4/x2-81 is continuous. 9)Find dy/dx for the...

8)Determine the intervals on which the function f(x) = 4/x2-81 is continuous.

9)Find dy/dx for the function y=29x

10)The edges of a cube increase at a rate of 5 cm/s. How fast is the volume changing when the length of each edge is 40 cm?

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