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Naily [24]
3 years ago
14

A stained glass window is going to be installed in a semi-circular opening, which is above a 34 inch wide door. If the stained g

lass window costs $0.95 per square inch, how much will the window cost? Use 3.14 for π
as necessary.
A. $389.10
B. $1,724.17
C. $431.04
D. $494.55
Mathematics
1 answer:
Tasya [4]3 years ago
3 0

The area of a full circle would be Area = PI x r^2

The diameter would be the width of the dorr, so the radius would be half that. 34/2 = 17  inches.

Area for a full circle would be 3.14 x 17^2 = 907.46 square inches.

A semi circle is a half circle.

The area would be 907.46 / 2 = 453.73 square inches.

Multiply the area by the cost:

453.73 x 0.95 = 431.04

The answer is C.

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2 years ago
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3 0
3 years ago
Can someone tell me how to do this! #2 &amp; #4
torisob [31]
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4) Area is 1.16 cm^2. Again you would seperate it. So, 1 * 1 = 1 and .2 * .8 = .16. Then you add it together and get 1.16 cm^2. The perimeter is all the sides added up. You get 4.2 cm. 
8 0
3 years ago
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H
Dennis_Churaev [7]

Answer:

She will have $71.32.

Step-by-step explanation:

135-(44.8+18.88)=71.32

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3 years ago
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