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How much butter is equal to 2 tablespoons of oil? Differentiate(t) = (cos^3 t+ 3cost +7)^9? If I save 300 dollars every 2 weeks for 6months how much will I have? Multiply matrices A and B of any sizes legally (no size compatibility requirment). What kind of matrix multiplication am I? Outside temperature over a day can be modelled as a sinusoidal function.?