Brianna went on a trip to the art museum and sketched a scale drawing of a rectangular wall mural. she used a scale factor of 0.2. the sketch was 12 inches wide and 18 inches long. what was the length of the mural?

The length of the mural was 90 inches

Step-by-step explanation:

The scale is the relationship that exists between the magnitudes of a drawing and the actual dimensions. This is:

scale factor = Drawing length /Actual length

In this case, you have that:

So:

Solving this, you get:

actual length=90 inches

So, the length of the mural was 90 inches