allie is designing a poster for her wall. her design is a rectangle that is 8 inches wide and 12 inches long, but she wants to increase the size by a scale factor of 3 for display. what will the length of the poster be?

12 × 3 = 36

i am a mathematics teacher. if anything to ask please pm me

The actual size of the poster can be calculated using the formula:
Actual Size = Scale Factor * Design Size.
 
For the length of the poster, Length = 3 * 12 = 36 in.

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sorry my computer can't do the line in between the numbers but I hope it helps!