Alex made a sketch for a poster contest. The sketch measures 4 in. × 5 in. The scale factor from the sketch to the finished poster was 2 in. to 5 in. What were the dimensions of the poster?

Respuesta :

4*5/2 = 10
5*5/2 = 25/2 = 12/5 

The poster is 10 x 12.5 inches.