A ball falls vertically after being dropped.
The ball falls a distance d metres in a time of

T seconds.

D is directly proportional to the square of T

.

The ball falls 20 metres in a time of 2 seconds.

(a) Find a formula for D

in terms of T

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.