The answer is: A - f(x) = 1/2 cos (x)
Answer: 12 hours
Step-by-step explanation:
Given : Working together, it takes Sam, Jenna, and Francisco two hours to paint one room.
When Sam works alone, he can paint one room in 6 hours. When Jenna works alone, she can paint one room in 4 hours.
Let 't' be the time taken by Francisco to paint one room on his own.
Then , we have
Rate of work of Sam +Rate of work of Jenna + Rate of work of Francisco =Rate of work they all do together

i.e. 
i.e. 
i.e. 
i.e. 
i.e. 
i.e. 
i.e. t= 12
Hence, Francisco would take 12 hours to paint one room on his own.
164 or sum like that don’t take this as a definite answer cause I am not sure
This is a professional level of thinking
Let’s evaluate
Molly and her five friends=6 humans
therefore it would be 300 oranges divided by 6 Humans=50