The order of the 3 books does not matter so its the number of combinations of 3 from 45
b is the correct choice
Answer:
We often use everyday definitions of the word "energy," but which statement
best describes what energy is in science?
A. the ability to carry things a long distance
B. the result of eating a lot of carbohydrates
C. the amount of time something can keep moving without rest
D. the ability to do work or cause change
Step-by-step explanation:
Answer: The answer is 81.
Yeah also you got it correct, congrats.
