Can you please explain? I haven't learned this yet.

That should be 36x10^12

Step-by-step explanation: Scientific notation is basically a way of making a big number small instead of writing a ton of zeroes we can just write it in scientific notation. In this case the answer would be 36 trillion which would be a lot of zeroes so with scientific notation we write it as 36x10^12  btw the ^ is to make it an exponent so its 10 to the twelfth power. So you can just solve the basic equation to get the real number. So the answer is 36x10^12.

it would be:

c.parallelogram.

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.