If gasoline costs $.80/L and you drive 24000km per year, then your annual cost for gasoline will be 19200 given by the function C(x) = where x is the number of km/L that your car can travel. X a) Find your annual gasoline costs if your c) What is the average rate of change in car gets 3 km/L the annual gasoline cost as x changes from 3 to 8? b) Find your annual gasoline costs if your d) What is the instantaneous rate of car gets 8km/L change in your annual fuel costs when x = 5?The length of a rectangle is increasing at a rate of 3 cm/s. If the area of the rectangle is not changing, at what rate is the width of the rectangle changing when the length is 10 cm and the width is 5 cm? Water is being poured into a conical vase at a rate of 18 cm /s . The diameter of the cone is 30 cm and the height of the cone is 25 cm. At what rate is the water level rising when the water's depth is 20 cm? (Hint: the volume of a cone is..V = =mrzh)