I believe you mean, round it off to "two significant digits"
439,264 km = appr 440,000 km
etc
round it off to the first 2 numbers
•439,264 km
•15million degrees celcius
•1.00794 atomic mass unit
•140pm
•14.00674 atomis mass unit
2 answers
yeah 2 signifacant digints sorry btw anyway thanks!