Question

1 lt
1) What should be added to (-13 + 3) to get 1? -

2) An Elevator desends into a mine shafts at the rate of
6m/min If the descent starts from 20 m above
the ground.level how long will it take to reach -350m
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Answer 1

Answer:

1) -15. 2) 1980m is your answer for the question