I believe the control group is what doesn't change in the experiment, and the experimental group is what is being tested / receives the treatment :)
Hope this helps! 159.2086<span>Have a Good Day!</span>
Answer:
A. The cost of producing a kilowatt of power with fuel cell will be less than $30 in 2015
Answer:
2. carbon
Explanation:
carbon should be the answer
Answer:
The filter bed is cleaned by occasional backwashing ;-; im sorry if this isn't a great answer but I tried
