Hello can you me posted picture of question

Descending order means in decreasing order.
So for the polynomial we have to check the exponents. If the exponents are in decreasing order, we say that the polynomial is in descending order.

From the given options only option C lists the polynomial in descending order starting with exponent 7 then 5, 4, 3 and constant term. Rest of the options do not list the polynomial in descending order.

So the answer to this question is Option C

Rounding decimals is very similar to rounding other numbers. if the hundredths and thousandths places of a decimal is forty-nine or less, they are dropped and the tenths place does not change. for example, rounding 0.843 to the nearest tenth would give 0.8. , your welcome !