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5 February, 01:05

A free falling object increases speed by a little over 22 miles per hour each second. The arithmetic sequence 22,44,66 ..., represents the speed after each second, in miles per hour, of a dropped object. How fast is a rock falling after 8 seconds if it is dropped over the side of a cliff

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  1. 5 February, 01:29
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    176 mph after 8 seconds
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