A) \[3\times {{10}^{-2}}\]
B) \[3\times {{10}^{-3}}\]
C) \[3\times {{10}^{3}}\]
D) \[3\times {{10}^{2}}\]
Correct Answer: B
Solution :
We have, \[5\times {{10}^{-3}}-2000\times {{10}^{-6}}\] \[=5\times {{10}^{-3}}-2\times {{10}^{3}}\times {{10}^{-6}}\] \[=5\times {{10}^{-3}}-2\times {{10}^{3-6}}=5\times {{10}^{-3}}-2\times {{10}^{-3}}\] \[=(5-2)\times {{10}^{-3}}=3\times {{10}^{-3}}\]You need to login to perform this action.
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