3. The graphs shows the amount of a chemical In a water sample at different times after It was first measured. Select all statements that are true. -2,400 2,000 1,600 1,200 800 400 2 3 4. time (hours) A. The amount of the chemical in the water sample is decreasing exponentially. B. The amount of the chemical in the water sample is not decreasing exponentially. C. It is not possible to tel-for certain whether or not the amount of the chemical is decreasing exponentlally. D. When it was first measured, there were 2,000 mg of the chemical in the water sample. E. After 4 hours, there were 100 mg of the chemical in the water. chemical (mg)

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