Find the area A of the sector of a circle of radius 80 meters formed by the central angle 1/5 radian.

For what value of x does 4x = (1/8) x + 5?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

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?