What is the volume of the rectangular pyramid shown below? A. 252 cubic in.
B. 168 cubic in.
C. 45 cubic in
D. 84 cubic in.

252 multiply on the sides and when your done divide 504 by 2 and there you go

It is (c+d)

you can basically use FOIL (first,outside,inside,last) to solve this.

you know the first term of the factor has to be C because of the c^2

the second then has to be D because you haven't seen D in the factor yet and it is in the equation.

then you know from the equation that the terms with D are not negative so D isn't negative so you have form the information above (c+d)