Question

what is the surface area of the rectangular pri square inches

Explanation:

Step1: Identify the dimensions

Let length $l = 12$ in, width $w=4$ in, height $h = 3$ in.

Step2: Recall surface - area formula

The surface - area formula of a rectangular prism is $SA=2(lw + lh+wh)$.

Step3: Calculate $lw$

$lw=12\times4 = 48$ square inches.

Step4: Calculate $lh$

$lh=12\times3 = 36$ square inches.

Step5: Calculate $wh$

$wh=4\times3 = 12$ square inches.

Step6: Substitute into the formula

$SA = 2(48+36 + 12)$.
First, add the values inside the parentheses: $48+36+12=96$.
Then, multiply by 2: $SA=2\times96 = 192$ square inches.

Answer:

192