Hi Erik,

Thanks for pointing this out! In general, working with significant figures and rounding with physics can sometimes get a little messy. I fixed the problem in Chapter 11 I think you're referring too. I also changed the other question with the same setup to be a little more lenient with the accepted answers.

Let me know if there are other questions you're still having this trouble with and I'll take a look. It will be helpful if you let us know which chapter you're referring to.

Thanks!