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

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:

              or

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.

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Conclude:

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

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have