In the diagram, a building casts a 20-ft shadow and a flagpole casts a 7-ft shadow. if the flagpole is 12 ft tall, how high is the building? 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?