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Verified Answer :

You would just divide 38.27 by 8.9 and get 4.348 ft/minute.

AL2006


Average rate of change  =  (amount of change)  /  (time for the change)

                                   =        (-38.27 ft)   /   (8.9 minutes)

                                   =      (-38.27 / 8.9)  (feet/minute)

                                   =          - 4.3 feet per minute