Respuesta :
The law of conservation of energy is one of the most commonly used principles in physics and chemistry wherein it states that "Energy can neither be created nor destroyed; rather, it transforms from one form to another." Therefore, the energy entering the system, should be equal to the amount of energy leaving the system.
Answer: If this question is from Edmentum or Plato, then the answer is 15 units
Explanation:
I had this question on an Edmentum test and I got it right
Hope this helps! :)