Efficiency is completing a task as fast a possible the the least amount of effort.
Answer: Released
Explanation: Energy is released in this reaction possibly in the form of heat thus it is an exergonic and or exothermic reaction.
I believe B, but don’t take my word
Yes but pleas be more specific
First let's convert everything into SI units.
The length of the blade is 3 inches. Keeping in mind that 1 inc=0.025 m, we have

The angular speed is 600 revolutions per minute. Keeping in mind that

and

, the angular speed becomes

And so, the linear velocity of the edge of the blade is equal to