I think the answer b not sure
I would say B(make the ramp longer). That way they will have to exert less force in order for it to the desired height. If you think about it, it is harder to go up a really steep hill vs. a hill with a gradual incline, because you have to exert less force at any one given time.
Combustible more specific answer chemical reaction
27 + (35,5 + 2* 16) * 3 = 229.5 g/mol
Answer:
A substance with a high activation energy is expected to have a slow reaction rate.