Me,
i will mark you as brainliest

Note: As you can see on the attached picture, I've split the shape into three chunks. By comparing the sides and using some subtraction I came up with some information that will make the problem easier and wrote it in purple. If you have any problems following my logic there, feel free to send me a message of comment under this and I'll elaborate.
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Left Most Chunk:

-The formula for finding the area of a circle is A=πr^2. In this problem we are finding 1/2th of a circle so the formula would look like A=1/2(πr^2).

-Radius: 9

-Work:
A=1/2(πr^2)
A=1/2(π9^2)
A=1/2(π81)
Keeping in mind to use 3.14 for pi as one of your other questions requested...
A=1/2(254.34)
A=127.17 sq ft
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Middle Chunk:

-This is basic area finding (Length x Width)

-Work:
A = l x w
A = 15 x 4
A = 60
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Right Most Chunk:

-This is basic area finding (Length x Width)

-Work:
A = l x w
A = 3 x 6
A = 18
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Total Area:

-Work:
127.17+60+18= 305.27
————

305.27 square feet