The average of x and y is 16 and the average of x, y, and z is 22. What is the value of z

单项选择题What is the area of the triangle in the figure below（）

(A) 4.5
(B) 9
(C) 10
(D) 12.5
(E) 20

单项选择题According to the graph, which of the following is the best estimate of the total revenue from government funding in 1990（）

A．$60 million
B．$55 million
C．$45 million
D．$35 million
E．$30 million