8. Solve the following equations for x (show all solutions for 0°≤ x ≤ 360°): (4) (a) 4sin(x-30°) - 1.3 = 0 (5) cos2x + 5sin²x = 3 (b)

10. An airplane flying 390 feet per second at an altitude of 5000 feet flew directly over an observer. The image shows the relationship of the airplane to the observer at a later time. a.) Find an equation relating x and y. 5000°t 390 5000 b.) Find the value of x when y is 6,250. Observer c.) How fast is the distance from the observer to the airplane changing at the time when the airplane is dy at the time when dt dx = 390 and y = 6,250? dt 6,250 feet from the observer? That is, what is