A) \[7.13\times {{10}^{14}}\]
B) \[7.13\times {{10}^{15}}\]
C) \[71.3\times {{10}^{14}}\]
D) \[-3.994\]
Correct Answer: A
Solution :
[a] \[1.236\times {{10}^{15}}-5.23\times {{10}^{14}}\] \[={{10}^{14}}(12.36-5.23)=7.13\times {{10}^{14}}\]
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