40. A triangle is placed inside of a circle of radius 3x. The base of the triangle is 2x and the height is x
a. Find the area of the circle not covered by the triangle.

b. Find the area when x =
4 in.

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.