Question 1032908
This is a geometric sequence {{{a[n]}}} with {{{a[1] = -1/250}}} and common ratio r = 5.

The general nth term for a geometric sequence is {{{a[n] = a[1]*r^(n-1)}}}.

==> {{{a[8] = (-1/250)*5^(8-1) = -625/2}}}.