A primary source saw something first-hand. A secondary source only heard about it.
i think the graph g(x) has been shrunk vertically by a factor of 1/5 and shifted up by 4 units :)
45 on each bus. 365 minus 5 in cars is 360. Divided by 8 to get 45.
Area of the sector = 1/2 * r^2 * theta where theta is the angle subtended by the arc at the center ( in radians)
In this case m < theta = 360 - 235 = 125 degrees or 2.182 radians
So, the area of shaded area = 1/2 * 20^2 * 2.182 = 436.4 in^2
