On a blueprint for a new building, 2 inches = 8 feet. The height of the building on the blueprint is 9 inches. What is the actual height of the building?

Correct  H = 36 feet

Step-by-step explanation:

Given:

2 (inches) : 8 (feet)  Scale on the blueprint, with meaning  2 inches on blueprint versus 8 feet in reality

h = 9 inches height on the blueprint

H = ?  actual height of the building

We will form a proportion:

2 : 8 = h : H

2 : 8 = 9 : H  ⇒  2 H = 9 · 8 = 72  ⇒ H = 72 / 2 = 36 feet

H = 36 feet

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