I'm confused about this question

You are updating your garage and the only thing left to paint is your garage day. you're only going to paint the slide that faces the street. the garage door is 9 fert 8inches tall and 120 inches wide. you need to know the surface area of the side of the garage door to determine how much paint to buy. the hardware store sells paint by how much covers a square foot. what is the surface area you should report to the hardware store what is the answer

1: 4 if the wew 35 surfboards at the beach how many were short boards?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.