Find the limit, if it exists. (if an answer does not exist, enter dne. ) lim (x, y)→(0, 0) x4 − y4 x2 y2.

Nikolas calculated the volume of the prism. his work is shown below.

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?