In the case where 10 blocks are used, the scale factor is 62.5
How to get the scale factor?
First, we need to guess the number of blocks that your model is. Let's say that you used 10 blocks. We know that each block measures 2 ft, then the height of the model is:
10*2ft = 20ft.
Now, the Empire State Building has a height of 1,250 ft, then we want a change of scale from 20ft to 1250ft.
To get that, we take the quotient of the larger value and the smaller one:
k = 1250ft/20ft = 62.5
This means that each ft on the model represents 62.5 ft on the real building.
If you want to learn more about scales, you can read:
https://brainly.com/question/15891755
