Question

Find the surface area of a textbook that is 2 in. × 14 in. × 9 in.
(1 point)
Responses

50 in.2

50 in. squared

172 in.2

172 in. squared

252 in.2

252 in. squared

344 in.2

Answer 1

Surface area = 2(ab + ac + bc) with a=2, b=14, c=9:
2(2·14 + 2·9 + 14·9) = 2(28 + 18 + 126) = 2(172) = 344 in².