An apartment complex has a floor plan with dimensions shown. To effectively air condition a room, 20 BTU’s are required for every square foot. Determine the minimum BTU’s required for an air conditioner to cool the room effectively. Round the answer to the nearest 100 BTU’s.

12,900 BTU's are required to cool the room effectively.

Step-by-step explanation:

Step 1:

We must calculate the area of the entire shape to determine the minimum BTU's required to cool the room effectively.

It is made up of a semi-circle a rectangle, and a trapezoid.

Step 2:

The area of a semi-circle

Here, the diameter is 20 feet so the radius is 10 feet.

The area of the semi-circle square feet.

The area of a rectangle

The length of the rectangle is 22 feet and the width is 20 feet.

The area of a rectangle square feet.

The area of a trapezoid

Here .

The area of a trapezoid square feet.

Step 3:

The total area of the floor plan square feet.

If 20 BTU's are required for a single square foot,

The number of BTU's for 645.079 square feet BTU's.

Rounding this off, we get 12,900 BTU's required  to cool the room effectively.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72