Taken parallel to the base, which of the following solids has a cross section that is not a rectangle? a. rectangular pyramid b. square pyramid c. triangular pyramid d. rectangular prism

C.  This is because if you cut it in a plane parallel to the ground, the triangular pyramid (tetrahedron) you get a triangle, not a rectangle.  (Note that the square is a special case of a rectangle and is therefore considered to be one)

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.