Firewood is often sold by the cord a cord of wood is a bundle measuring 4' x 4' x 8' what's the volume of a cord of wood in cubic feet

If you answer 2+2 you will get over 80 points

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*