Respuesta :

Edufirst
Size of the painting: A * B 


Scale factor: 1/3


Size of the photo: [1/3]A * [1/3]B


[1/3]A = 13inches => A = 13inches * 3 = 39 inches


[1/3]B = 17 inches => B = 17 inces * 3 = 51 inches.



Answer: the size of the painting is 39 inches by 51 inches.