Explanation:
Let the number of people that cut thhe paper = n
let A(n) the area in inches left after the paper has been cut
The total area of the piece of paper is 80 inches
When n = 1. This means that the first person will cut 1/4 pieces of the paper
A(n) = 80 - 1/4(80)
A(n) = 80 - 20
A(n) = 60 inches
Hence, the area of the paper remaining is 60 inches
when n = 2
A(n)= 60 - 1/4(60)
A(n) = 60 - 15
A(n) = 45 inches
Hence, the area of the paper remaining is 45 inches
when n = 3
A(n) = 45 - 1/4(45)
A(n) = 45 - 11.25
A(n) = 33.75 inches