They don’t know whether or not the promises that were made will be kept.
I got a 100 on that question, and this is what I put
Since its a sibling, and siblings tend to be in a person's close circle of people, informal speech is used.
Answer:
The idea is that it's hard but you'll be happy when you're done
The correct answer to this question is:
"Relative abundance is a comparison between the isotopes and Percent abundance is a comparing the totals." Relative<span> species </span>abundances tend to conform to specific patterns. Percent abundance <span> can be calculated by finding the percentage of an isotope compared to another isotope of an element using its relative atomic mass.</span>
