What effect does doubling the radius of a cylinder have on the volume of the cylinder?

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

100 points, hi, i’m not sure what to do here,the data doesn’t seem to be quadratic .? can anyone me, in advance