What is the surface area of the prism?

a. 140 in2
b. 144 in2
c. 420 in2
d. 288 in2

You have to find the areas of the triangle faces and rectangular faces, so…
the triangles' areas are:
6 • 16 = 96
the rectangles on the sides have areas of:
10 • 9 • 2 = 180
and the base rectangle has an area of
16 • 9 = 144
the surface area is 96+180+144 which is 420 in2.

A) 144.44 sq inches i believe