What is the area of the trapezoid shown below?
7
25
4

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)