Could you be more specific about what you need to know here? Where are the instructions for this problem? Try to explain what you do understand and what you don't.
Answer: A
Explaination:
The cause and effect relationship of a certain phenomenon under controlled condition
Answer:
3/4, 0.73, 1/4, 0.24
Step-by-step explanation:
1/4=25/100=0.25
3/4=75/100=0.75
The shelf can hold: 15 x 5 = 75 books
Two thirds of the shelf: 75(2/3)= 50 books