Answer:
(i) \[2.7\times {{10}^{12}}=2.7\times 10\times 10\times 10\times 10\times 10\times \]\[10\times 10\times 10\times 10\times 10\] \[=2.7\times 10000\times {{10}^{8}}\] \[=27000\times {{10}^{8}}\] Clearly, \[27000\times {{10}^{8}}>1.5\times {{10}^{8}}\] \[\Rightarrow \]\[2.7\times {{10}^{12}}>1.5\times {{10}^{8}}\] (ii) \[3\times {{10}^{17}}=3\times 10\times 10\times 10\times 10\times 10\times 10\times 10\] \[\times 10\times 10\times 10\times 10\times 10\times 10\times 10\times 10\times 10\times 10\] \[=3\times 1000\times {{10}^{14}}\] \[=3000\times {{10}^{14}}\] \[\because \] \[3000\times {{10}^{14}}>4\times {{10}^{14}}\] \[\therefore \] \[3\times {{10}^{17}}>4\times {{10}^{14}}\]
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