Help these are due today

Answer:
7.731 * 10^5
Explanation:
77 can't be scientific notation, for it is greater then ten. I simplely moved the decimal place over one, making it less than ten, then because of this change, I had to add one to the power of ten because it adds another place after the decimal. In regular form, it would be
773100
Hope this helped!
Answer:
7.731×10^5
Explanation:
77.31 can not be because the first variable in the scientific notation must be a value between 0-10
thus, the number will be 7.731
77.31×10^4=773100
if the number is 7.73100 then we move the decimal place to the end and count how many places to the right it took
for this instance, the decimal point moved 5 places to the right
therefore, the answer is 7.731×10^5