If f(x) = 2x3 + 18x2 + 56x + 40 and f(-1) = 0, then find all of the zeros of
f(x) algebraically.

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?

Afootball is throw by a quarterback to a receiver

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie