Answer: The answer that I got was J.
Step-by-step explanation:
misschien kunnen we dan antwoorden op je vraag
Answer: 90 Earth years.
Step-by-step explanation:
Analizing the information provided in the exercise, you need to find the Least Common Multiple (LCM) of the given numbers.
You can follow these steps:
1. You must descompose 6, 9, 15 and 18 into their prime factors:

2. Finally, you need to choose the commons and non commons with their greatest exponents and multiply them. Then you get:

Therefore, it will take 90 Earth years for them to all line up.
Answer: The 1st option is correct! :D
Hopefully this will help others as well!
Step-by-step explanation: