Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -6 and 162, respectively. a; an = 2 • 3n - 1 b; an = 2 • (-3)n - 1 c; an = 2 • 3n d; an = 2 • (-3)n + 1

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field