In expressing a length 810472 km as nearly as possible with three significant digits , find the percentage error.  Choose one.
A) 0.34%  B) 0.304%  C) 30.4%  D) 0.034%  E) 3.40%
Error = (81.5 – 81.472)km = 0.028.   Required percentage = [(0.028/81.472)*100]% = 0.034%.   ANSWER 0.034% 0.034%
<result>D</result>
In expressing a length 810472 km as nearly as possible with three significant digits , find the percentage error.