Price-Su pply Equation The number I at bicycle. helmets a retail chain is willing to sell per week at a price of $13 is given by z = am t: where a = 35, b = 25', and c = 41D. Find the instantaneous rate of change cut the supply.r with respect to price when the price is $?'}'_ Round tc: the nearest hundredth [2 decimal places]. helmets per dollar