Mikea, an intern with the Parks and recreation Department, is developing a proposal for the new trapezoidal Springdale Park. The figure below shows her
scale drawing of the proposed park with 3 side lengths and the radius of the
merry-go-round given in inches. In Mikea's scale drawing, 1 inch represent 1.5
feet.

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?