Mary is looking up at a skyscraper. Her vision is perfectly aligned with the top of the skyscraper. She is 400 feet from the center of the skyscraper. The skyscraper is 850 feet. At what angle is Nancy looking up at the skyscraper? Round your answer to the nearest tenth.

A) 25.2

B) 26.3

C) 64.8

D) 74.8

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?