297,499 rounded to the nearest hundred

And explain how you got it so i can understand future problems : 3

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)