PLEASE HELP!!

Match each function to its domain and range

Polynomial that can be factored as (3x-4)(3x+4)

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)