Question

can someone help me with this? Thank you!

Answer 1

Answer:

384

Step-by-step explanation:

W x L x 2 + H x L x 2 + W x H x 2  = Formula for Surface area of a rectangular prism

9x12x2=216,  4x12x2=96, 9x4x2=72  Then add them all up

216+96+72=384

Brainly would help, thank you and have a good day.

FYI  I did not copy this took ten minutes to do pls no report...  thanks

Answer 2

$\qquad\qquad\huge\underline{{\sf Answer}}$

Surface area of a rectangular prism is ~

$\qquad \sf  \dashrightarrow \: 2(lb + bh + lh)$

• l = Length = 12 ft

• b = width = 9 ft

• h = height = 4 ft

$\qquad \sf  \dashrightarrow \: 2 \{(12 \times 9)+ (9 \times 4) +( 12 \times 4) \}$

$\qquad \sf  \dashrightarrow \: 2 \{(108)+ (36) +( 48) \}$

$\qquad \sf  \dashrightarrow \: 2 \{192\}$

$\qquad \sf  \dashrightarrow \:384 \: \: ft {}^{2}$