Answer:
LOL WHEN PPL ONLY COME HERE TO ANSWER KHAN ACADEMY ANSWERS
Step-by-step explanation:
It will take the hamster 28 days to eat 8 whole bags of carrots.
If you divide 8 by 2/7 you will get the answer of 28.
You didn't post any option, but the ration roots theorem states that all possible rational roots of a polynomial come in the form

where p divides the constant term and q divides the leading term of the polynomial. So, in your case, p divides 3 (i.e. it is 1 or 3), and q divides 5 (i.e. it is 1 or 5).
So, the possible roots are

For the record, this parabola has no real roots.
Tens: 850
Hundredths: 852.97
Tenths: 853
Thousandths: 852.971
Ones: 853