Question

Calculate the surface area and show work :) please help me no links!!

Answer 1

Answer:

294 in.²

Step-by-step explanation:

I believe this figure is a rectangular prism.

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Explain:

To find the surface area of a rectangular prism, use this formula:

$SA=2lw+2lh+2wh$

              or

$SA=2(lw+lh+wh)$

$l-length$

$w-width$

$h-height$

A phrase I use to help remember this formula is:

LISA WILSON LOST HER WITCH HAT TWICE (2)

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Solve:

The length of this rectangular prism is 9 in.

This width is 10 in.

The height is 3 in.

Now, I will plug the numbers into the first formula.

$SA=(2*9*10)+(2*9*3)+(2*10*3)=294 in.^2$

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Conclude:

I, therefore, believe the area of this rectangular prism is 294 in.²