(a) If \(9^{2x - 1} = \frac{81^{x - 2}}{3^{x}}\), find x. (b) Without using Mathematical Tables, evaluate: \(\sqrt{\frac{0.81 \times 10^{-5}}{2.25 \times 10...

(a) If \(9^{2x - 1} = \frac{81^{x - 2}}{3^{x}}\), find x.

(b) Without using Mathematical Tables, evaluate: \(\sqrt{\frac{0.81 \times 10^{-5}}{2.25 \times 10^{7}}}\)

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