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Answer pls man im trying to get out of summer school

You work for a landscape company that just got a contract to re-mulch a park. the area that needs mulching is 30 feet by 60 feet. they want a 3 inch layer of much on the area. the company has bags of mulch that cover 2 cubic yards that cost $4.00 per bag. how much will it cost the consumer just in materials to re-mulch the area (round to the nearest dollar)?

If f(x) = -2x2 - 3 and g(x) = 3x - 4, then f(g(2))=