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A rock sinks 160 feet in 20 seconds. Find the average rate of change per second.
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A rock sinks 160 feet in 20 seconds. Find the average rate of change per second.

User Scott Davis
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we need to find how many feet a rock sinks per second. assuming the rock falls at a constant rate we can divide each number by 20 to get 8 feet per second.

to check our worker can multiply our feet by 20, in which we get 160.
User Nitramk
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