Someone me #1-6 all i also need the solution on how you get the answer. in advance!

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks