Respuesta :
The scale Tia used to make the drawing is 1:8.
What is scaling?
Scaling is the increase or decrease in the size of a figure or image by a scale factor k.
Given that the actual length of the building is 168 feet, and its width (with porticoes) is 152 feet. If the scaled length of the building in the drawing is 21 inches and the width is 19 inches, hence the scale used is:
Scale used = 21/168 = 19/152 = 1/8
The scale Tia used to make the drawing is 1:8.
Find out more on scaling at: https://brainly.com/question/2826496