Answer:
12 square units.
Step-by-step explanation:
The environment changed so the light moths benefited from the ad adaptation that they had that in cause an increase in light moths.
M=4
12/3=4
1st term a₁ = - 3.7; common difference d = - 1.3
the nth term a(n) = a₁ +(n-1)d or a(n) = 3.7 + (n-1)(-1.3)
a(n) = - 3.7 - 1.3n + 1.3 ====> -2.4 - 1.3.n Or as per your answer:
a(n) = -1.3.n - 2.4
