Question

Find the surface area of the prism. Round to the nearest tenth if necessary. The three sides are all 8.1 inches, the area of the base is 28.4 inches^2, and 12 inches is the length. It's a,b,c, or d. A. 348.4 in^2 B. 320 in^2 C. 291.6 in^2 D. 251.2 in^2

Answer 1

the three long faces are 8.1x12 rectangles, so the total area is 3 faces + 2 bases:

3*8.1*12 + 2*28.4 = 291.6

Looks like C to me.

Answer 2

find the surface area of each rectangular prism. round to nearest tenth if necessary. The top is 12ft the height is 1.7ft and the bottom is 6.4ft