The measure of one of the acute angles of a right triangle is decreasing at the rate of π / 36 rad / sec. If the length of the hypotenuse is a constant 40 cm, how fast is the area changing when the acute angle is π / 6?

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.