Assessing how well one variable predicts another variable is to blank as detecting cause-effect relationships between different variables is to

D) correlational research; experimental research

Explanation:

In correlational research the effect that one variable has on the other is studied without the addition of any external factor by the researcher. The subject is studied in a natural environment.

In experimental research how and why one variable affects another variable is studied. The subject is studied in the presence of various different variables introduced by the researcher.

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.

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its c i just checked it