An explicit equation is an equation used to find a term in a sequence without using the any previous terms. For example, if I have the set of numbers 1, 3, 5, 7, 9, my explicit equation is F(n)=2(n-1)+1. If I plug 1 in for n, I get F(1)= 2(0)+1, which is 1, my first term.
Hope this made sense.
The personal loans is not a kind of consumer credit
Well if the original population is 250 crickets after 6 months it would double to 500. After another 6 months (A year now) it would again double in size to 1000 and so on for 2 more periods of 6 months. After doubling two more times you get 4000, or answer D.
I would try using Photomath or Desmos both great graphing apps!