Whats 2+2+9+7+10+67+89+572+53+4=?

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

Witch represents the inverse of the function f(x)=1/4x-12

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?