If f(x) = 7x - 3 and g(x) = x2, what is (g•f)(1)

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.