Which statement best describes how to determine whether f(x) = 9 – 4x^2 is an odd function?

determine whether 9 – 4(–x)^2 is equivalent to 9 – 4x^2.

determine whether 9 – 4(–x^2) is equivalent to 9 + 4x^2.
determine whether 9 – 4(–x)^2 is equivalent to –(9 – 4x^2).

determine whether 9 – 4(–x^2) is equivalent to –(9 + 4x^2).

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth