Which graph represents this table of an arithmetic sequence?

Part A - 9 cm; Part B - 1836 cm²

Step-by-step explanation:

Part A:  The volume of a triangular prism is given by the area of the base (area of the triangle) multiplied by the length of the box.  To find the area of a triangle, we use the formula A = 1/2bh; this gives us

V = 1/2bhl

Using the information we have gives us

3240 = 1/2(24)(h)(30)

3240 = 360h

Divide both sides by 360:

3240/360 = 360h/360

9 = h

Part B:  We are looking for the surface area of this prism.

There are two triangular sides, each with a base of 24 and a height of 9.  Their areas are:

A = 1/2bh = 1/2(24)(9) = 108 sq cm each.  For two of them, this makes

108(2) = 216 sq cm

There are two rectangular sides whose dimensions are 15 by 30; their areas are

A = 15(30) = 450.  For two of them, this makes

450(2) = 900 sq cm.

There is one rectangular side whose dimensions are 30 by 24.  Its area is

A = 30(24) = 720 sq cm.

This makes the total surface area

216+900+720 = 1836 sq cm.