Answer:
2^-3m
Explanation:
Correct me if I'm wrong since the image is not very clear
look like length is 2^-1m
while width is ?m
so area = length x width
2^-4 m^2 = (2^-1)m x ?m
2^-4 m^2 = m^2(2^-1 x ?)
2^-4 = 2^-1 x ?
? = (2^-4)/(2^-1) = 2^(-4 - -1) = 2^(-4 + 1) = 2^-3
so width = 2^-3m