Evaluate (frac{6.3 times 10^5}{8.1 times 10^3}) to 3 significant fiqures

A.
77.80 
B.
778.0 
C.
7.870 
D.
8.770 
E.
88.70
Correct Answer: Option A
Explanation
(frac{6.3 times 10^5}{8.1 times 10^3})
(frac{7}{9} times 10^{2})
= (0.77778 times 10^{2})
= (77.778 approxeq 77.80)