precision 1 km GPE 0.5 km
Work Step by Step
The last significant digit is the 5 in the ones position, so the precision is 1. Greatest possible error is half the precision. $0.5\times1=0.5$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.