The horsepower of an engine is a function of it's bore: $Hp = 165\!\left(95-\frac{1}{b}\right)$, with the bore measured in mm. The bore of the engine depends on the temperature: $b = 94+\frac{T}{2400}$, with the temperature measure in degrees Fahrenheit.
Horsepower as a function of temperature is given by
The rate of change of horsepower with respect to bore is =
The rate of change of bore with respect to temperature is =
The rate of change of horsepower with respect to temperature is =

Your answers to the last three questions should be of the form
$\frac{df}{dx}$=formula with units
The abbreviations for units are "hp" for horsepower, "F" for temperature in Fahrenheit, and "mm" for millimeters.