How many seconds are there in 2500 years? (assume 1 year = 365 days.)
express your answer using three significant figures.

it's filtration, but this is an assumption so my apologies if i got this

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.