The drawing is composed of a rectangle and a semicircle find the area of the figure to the nearest unit.

The area equation for a rectangle is length times width.  And the area equation for a half (or semi) circle is (1/2) times pi (or 3.14) times the radius squared.

So, you have to add the area of the rectangle and semi-circle together.

Rectangle: A = 18*10 = 180 cm^2
Semi-circle: A = (1/2)*3.14*(18/2)^2 = 127.17 cm^2

Add those together to get 307.17cm^2 or choice C.