E(s) = -0.015(s - 45)² + 30
The equation above models the fuel economy E(s),
in miles per gallon (mpg) of fuel, of a certain vehicle
as a function of constant vehicle speed s, in miles per
hour (mph), where 20 ≤ s≤ 70. Based on the model,
which of the following is the best interpretation of
E(25) = 24 in this context?