12 18
24
30
Number of
books
Price ($)
B
50
56
62
66
12
24
48
96
Number of
books
Price ($)
C.
50
150
200
250
12
36
48
60
Number of
books
Price ($)
D
50
150
200
250
120
180
240
300
Number of
books
Price
($)
120
156
220
460

i done know sorry for not answering ur question

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.