\(\sqrt {0.0025}  \times \sqrt {2.25}  \times \sqrt {0.0001}  = ?\) 

Solution: 

\(\sqrt {0.0025}  \times \sqrt {2.25}  \times \sqrt {0.0001} \) = \(\sqrt {{{(0.5\;)}^{2\;}}}  \times \sqrt {{{(1.5\;)}^{2\;}}}  \times \sqrt {{{(0.1\;)}^{2\;}}} \) = 0.05 \( \times \) 1.5 \( \times \) 0.01 = 0.00075 

  Alternative: \(\sqrt {\frac{{25}}{{10000}} \times \sqrt {\frac{{225}}{{100}}}  \times \sqrt {\frac{1}{{10000}}} }  = \frac{5}{{100}} \times \frac{{15}}{{10}} \times \frac{1}{{100}} = \frac{{75}}{{100000}}\) = 0.00075