By definition of the binomial coefficient,

so we have

as required.
When answering this question, I'm assuming "18 down" means 18 gallons
To find the answer, we can divide:
40/18 = 5
( This basically means that there are 5 containers in the 40 gallon container)
knowing this:
45*5 = 225
(Basically solves the time to fill 5 containers)
It will take 225 seconds
Answer:
(0 2,3,5)
Step-by-step explanation:
Domain is the x factor of every relation
Will you please provide more information and state a clear question