If the Total Revenue Function for a Toy Is

Multiple Choice

If the total revenue function for a toy is dollars and the total cost function is dollars. What is the instantaneous rate of change of profit if 10 units are produced and sold? Explain its meaning. ​

A) 0.20. Selling an additional unit when 10 have been sold increases profit by $0.20.
B) 0.60. Selling an additional unit when 10 have been sold increases profit by $0.60.
C) 6.80. Selling an additional unit when 10 have been sold increases profit by $6.80.
D) 7.00. Selling an additional unit when 10 have been sold increases profit by $7.00.
E) 234.00. Selling an additional unit when 10 have been sold increases profit by $234.00.