[Reposting because I never got help]

Is the polynomial a difference of squares? Select Difference of squares or Not a difference of squares for each polynomial.

y^4−25

20m^2n^2−121

p^8−q^5

16x^2−81

The unpaid balance on a mastercard charge was $1,056.23. during the month, payments of $300 and $250 were made and charges of $425 and $274.16 were added. if the finance charge is 1.2% per month on the unpaid balance, find the new balance at the end of the month. $1,205.39 $1,218.06 $918.06 $1,768.06