The number x of bicycle helmets a retail chain is willing to sell per week at a price of $p is given by x=80√√p+9-350, 20 ≤ p ≤ 100. Complete parts (A) and (B). Supply/Demand 800- x=1000-55p9 700- 600- 500- 400- 300- 200- 100- X=80p 9-350 0 20 40 60 G dx (A) Find dp dx dp (B) Find the supply and the instantaneous rate of change of supply with respect to price when the price is $91. Interpret your results. When the price is $91, the supply is ☐ When the price is $91, the instantaneous rate of change of supply with respect to price is At a price of $91, the supply is is 80 100 120 at a rate of bicycle helmets per week and supply bicycle helmets per dollar. Price (Dollars)