in expressing a length 810472 km as nearly as possible with 3 significant digits , find the percentage error .
Options: A) 0.034 B) 0.024 C) 0.352 D) 0.063 E) 0.026

Rationale: error = ( 81.5 – 81.472 ) km = 0.028 . required percentage = [ ( 0.028 / 81.472 ) * 100 ] % = 0.034 % . answer a .
Answer: A