If Mario is standing 7 feet from the base of a tree and he is 5'tall. The angle of elevation from Mario's eye level to the top of the tree is 80 degrees. how tall is the tree? round to the nearest tenth

1- 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.2- 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 the first question?