Part A.
The speed is given by
In our case, the distance is 3.8x10^5 kilometers and the time is 2.16x10^3 minutes. By substituting these values we get
Part B.
We can rewrite the speed as
which is the product of two fractions.
Part C.
The first fraction is
and the second fraction is
This fraction can be written as
Therefore, the answers for part C are
Part D.
Yes, the values are written in scientific notation. Then, the speed is given by
which gives
then, the result is