mathswatch question 7 work out the size of angle x

Question 5 spring semester final exam math evaluate

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

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?