Which is true about the total mechanical energy in a closed system?
o
a. it is not conserved.
o
b. it is zero.
o
c. it does not change.
o
d. it is always decreasing.

I believe that is C due to it being in a closed system

58750.08068 is the answer i think

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )