In This Problem, Cost, Revenue, and Profit Are in Dollars

Multiple Choice

In this problem, cost, revenue, and profit are in dollars and x is the number of units. Suppose that the total revenue function is given by , and that the total cost function is given by . Find at , and explain what it predicts. Round your answer to two decimal places. ​

A) 120.00. The profit will increase by approximately $120.00 from the sale of the 101st item.
B) 57.78. The profit will increase by approximately $57.78 from the sale of the 101st item.
C) 17.78. The profit will increase by approximately $17.78 from the sale of the 101st item.
D) 68.89. The profit will decrease by approximately $68.89 from the sale of the 101st item.
E) 97.78. The profit will decrease by approximately $97.78 from the sale of the 101st item.