PLS help

Solve:

Greg buys 40 yards of wire fence to create
a triangular pen for his dog. One side of
the pen will use 19 yards of fencing. The
other two sides will be equal in length.
Greg would like his pen to use exactly
40 yards of fencing so that he doesn't
have any left over. What is the length of
each of the other two sides of the pen?

Zed is making a centerpiece for his dining room table by putting sand in a cube-shaped vase. the vase is 0.25 meters in length, width, and height. he bought 25 kg of sand. assume the density of dry sand is 1,602 kgm3. what is the volume of the sand that zed purchased? the volume of the sand is approximately m3. enter your answer as the number that correctly fills in the blank in the previous sentence. if necessary, round your answer to six decimal places, like so: 42.536475