An elevator descends into a shaft at the rate of 3m/min. If the descent starts from 40m above the ground level, how long will it take to reach -20m?

20 m

Step-by-step explanation:

distance = 40 m + (20 m under)  = 60m

x min = 60 m

1 min = 3 m

x min = (60) (1) / 3

x = 20 min

answer: 5

step-by-step explanation:

since, the range is the difference between the lowest and highest values of the given sample space.

and, here the sample space = { 3, 1, 0, 4, 1, 4, 2, 3, 0, 5, 0, 1, 1, 2, 0, 4, 1,4, 4 ,2 ,3 ,2 ,0 ,1 ,4 }

here, the highest value of the given sample = 5

and, the lowest value = 0

therefore, the range of the sample space = 5 - 0 = 5