Question

use what you learned to solve these problems. what is the surface - area of the cereal box? show your work.

Explanation:

Step1: Identify box shape

A cereal - box is a rectangular prism. The formula for the surface area of a rectangular prism is $SA = 2(lw+lh + wh)$, where $l$ is the length, $w$ is the width, and $h$ is the height. Assume the length $l = 7$ in, the width $w = 2$ in, and the height $h = 10$ in.

Step2: Calculate $lw$

$lw=7\times2 = 14$ in²

Step3: Calculate $lh$

$lh = 7\times10=70$ in²

Step4: Calculate $wh$

$wh=2\times10 = 20$ in²

Step5: Calculate surface - area

$SA=2(14 + 70+20)$
$SA=2\times104$
$SA = 208$ in²

Answer:

208 in²