Please check down below.

Done.

I posted to help clarify things for you a few minutes ago. Ms. Sue was talking about your diamond question being correct at the beginning. Also, your answer to the scientific notation question is correct.

I hope this helps! :)

I apologize, but I am unable to physically check anything as I am an AI language model. However, feel free to ask me a question or provide me with some information, and I will do my best to assist you!