Joe is building a fort for his little brother out of boxes. He is wondering how much room there will be inside the fort.
40 in
20 in
20 in
30 in
60 in
How much space is inside the fort?
inches

In a quadratic function of the form ax^2+bx+c, which of the following is not true? a. the y-intercept is c. b. if a is positive, the parabola opens up. c. the vertex has an x-coordinate of -b/2a. d. the axis of symmetry is the line y=-b/2a.