Surface area of a rectangular prism with length 10 meters, width 20 meters, and height 4 meters

640 m^2.

Step-by-step explanation:

There are 6 faces to this prism:

2 with dimensions 20*10 = 2*200 = 400 m^2

and  2*20*4  = 160 m^2

and 2*10*4 =  80 m^2

Total surface area = 400+169+80 = 640 m^2.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.