B. third
for every action there is a reaction*
An example of an energy conversion that produces an unwanted form of energy is mixing acids with water.
Answer: It's the third one.
Explanation:
The area of the sprinkles can be determined through the area of a circle that is pi * r^2 in which the given dimensions above are the radii, r. The second scenarios radius is only half of the original, that is 4 ft. In this case, we can compute the area of the second again. We calculate next the difference of two areas of circles.
