
Respuesta :
Okay so 550/10 is 55. So he went down 55 feet per minute. Or in otherwords, -55 (negative 55). Its negative because your going down.
Heart if it did help!
Answer:
Step-by-step explanation:
Average number of feet = Entire descent ÷ total time taken
                    = 550 ÷ 10 = 55 per minute
                    = -55
Negative sign denotes  he is descending.