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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answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a