A landscape architect plans to enclose a 2600 square foot rectangular region in a botanical garden. She will use shrubs costing $25 per foot along three sides and fencing costing $10 per foot along the north side. fence shrubs 1 shrubs X shrubs (a) If x is the length of fencing used, write a formula for the total cost in terms of x only. C(x) = (b) Find the length of fence that will minimize the total cost. Give an exact answer. X = feet (c) Find the minimum total cost. Give your answer to the nearest penny. $