Answer
The next three terms are $4,0.8,0.16$.
The points appear to lie on an exponential curve.
The graph is shown below.
Work Step by Step
The given sequence is
$2500,500,100,20,...$
Use table to organize the terms.
Each term is divided by $5$ to the previous term. So, the common ratio is $\frac{1}{5}$.
Divide a term by $5$ to find the next term.
Plot the ordered pairs $(n,a_n)$.
The complete table is shown below.
