The shape of nevada can almost be divided into a perfect rectangle and a perfect triangle. about how many square miles dose nevada cover

Unfortunately though, we are not given with the dimensions of the perfect triangle and perfect rectangle which would compose Nevada. The square miles that Nevada cover may be calculated by adding the areas of the rectangle and triangle which are calculated by the equations below. 
                      Area of triangle = bh/2
                      Area of rectangle = bh

For the first question the answer is a, for the second c, for the third d, for the 4th b, for the 5th a