A cleaning process removes 5% of a contaminant from a water source each week. There are initially 595 pounds of the contaminant in the water source.
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A: Write a formula that gives the amount C, in pounds, of the contaminant in the water source after t weeks.
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B: How much contaminant remains after 9 weeks?
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C: Make a graph that shows the amount of contaminant over the first 20 weeks.
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D: When will the contaminant level reach 206.33 pounds?
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Round your answers to two decimal places if necessary.
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What will be an ideal response?
B: 375 pounds
C:
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D: After 20.65 weeks
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