Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations). AWARDING BRAINLIEST!!!

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.