Given the expression 5a2b2 − 13ab + 7a3 − 4b, do the following as instructed below: A: Write the polynomial in descending order.
B: Classify the polynomial by the number of terms.
C: State the degree of the polynomial.

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

How do you solve a question like this?

Can someone me with these two circle theorem questions asap?