If points (6,0), (0,0), (0,2), and (a,2) are consecutive vertices of a trapezoid of area 7.5, what is the value of a?
A) 1.5
B) 2
C) 2.5
D) 5
E) 9
If points (6,0), (0,0), (0,2), and (a,2) are consecutive vertices of a trapezoid of area 7.5, what is the value of a?
A) 1.5
B) 2
C) 2.5
D) 5
E) 9