HARRY POTTER ROLEPLAY (I'M HERMIONE)

Ineed if you could explain and give me the answer you! this needs done

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.