What is the question you are asking?
Answer: yes
Step-by-step explanation: If you think about it like money would you rahter have $0.4 or $0.04 to change it into to decimal form you just do 2 divided by 5 hope this helped :)
Remember that
So if and , then we know .
Then use the Pythagorean identity to solve for cosine:
The value of y should be 8