The sales tax on a piece of furniture that cost $450 was $28.13.
what was the percent sales tax?

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

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.