we know that
Unit Rate is the ratio of two measurements in which the second term is one
so
to find the unit rate divide [tex](5/8)[/tex] by [tex](1/4)[/tex]
[tex]Unit\ rate=\frac{(5/8)}{(1/4)}= \frac{5}{8}*4= \frac{2.5}{1} =2.5 \frac{ft^{2}}{hour}[/tex]
therefore
the answer is
The unit rate is [tex]2.5 \frac{ft^{2}}{hour}[/tex]
