Please help lol, I’ll put 12 points please

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?

20000 as first it increases by 2500 then by 5000 so next it will increase by 10000

The second and fourth answer are correct