Question

what is the surface area of this rectangular prism? 8 ft. 15 ft. 8 ft. square feet

Explanation:

Step1: Recall surface - area formula

The surface - area formula for a rectangular prism is $SA = 2(lw+lh + wh)$, where $l$ is the length, $w$ is the width, and $h$ is the height. Here, $l = 15$ ft, $w = 8$ ft, and $h = 8$ ft.

Step2: Calculate $lw$

$lw=15\times8 = 120$ square feet.

Step3: Calculate $lh$

$lh=15\times8 = 120$ square feet.

Step4: Calculate $wh$

$wh=8\times8 = 64$ square feet.

Step5: Substitute into formula

$SA = 2(120 + 120+64)$. First, add the values inside the parentheses: $120 + 120+64=304$. Then, multiply by 2: $SA = 2\times304 = 608$ square feet.

Answer:

608