Scale model of skyscraper is 4.2 feet tall. When finished, skyscraper will be 525 meters tall. What scale was used to make model?

1 : 140

Step-by-step explanation:

The scale used to make the model of height 4.2 feet = 1.28016m of a skyscraper (a very tall building) of height 525m is given as:

1.28016/525

= 1 : 410.156

≈ 1 : 410