If the length of the cushion measures 13 in, the width measures 8 in, and the height measures 3 in, how much fabric does Greg need to cover the cushion?

To calculate the amount of fabric needed to cover the cushion, we need to find the surface area of the cushion.

Surface area = 2(length x width) + 2(length x height) + 2(width x height)

Plugging in the given measurements, we get:

Surface area = 2(13 x 8) + 2(13 x 3) + 2(8 x 3)
Surface area = 208 + 78 + 48
Surface area = 334 square inches

Therefore, Greg will need 334 square inches of fabric to cover the cushion.

To calculate the fabric needed to cover the cushion, we need to find the surface area of the cushion. The surface area of an object with 3 dimensions can be calculated using the formula:

Surface Area = 2(length x width) + 2(length x height) + 2(width x height)

Given the dimensions:
Length = 13 in
Width = 8 in
Height = 3 in

We can substitute these values into the formula:

Surface Area = 2(13 x 8) + 2(13 x 3) + 2(8 x 3)

Now, let's calculate the surface area:

Surface Area = 2(104) + 2(39) + 2(24)
Surface Area = 208 + 78 + 48
Surface Area = 334 in²

Therefore, Greg needs 334 square inches of fabric to cover the cushion.