Range of- (x)/((x^2)-9)(adsbygoogle = window.adsbygoogle || []).push({});

please explain in detail

also

the properties of exponents to simplify the expression

((16x^-2)(y^4))^1/2

A bacterial culture starts with 20,000 bacteria, and the number doubles every 40 min. Find the number T of minutes required for the culture to have 50,000 bacteria?

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# Pre Calculus help!

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