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First, find the base area.

Since it's a rectangular base, you'll want to multiply the length and width of the base.

You mentioned that two sides are 6 mi, and the other two sides are 7 mi.

Base Area = Length * Width Base Area = 6 mi * 7 mi Base Area = 42 square miles

Now, plug in the base area and height into the volume formula:

Volume = (1/3) * Base Area * Height Volume = (1/3) * 42 sq mi * 9 mi Volume = 126 cubic miles

Volume of your pyramid is 126 cubic miles.

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