The graph above shows the cost of mailing a first-class retail flat letter (for example, a letter in a manila envelop), c(x) , as a function of its weight, x , in ounces. Use the graph of the function to find:

a) The cost to mail a 3.5 ounce first-class letter.
Answer:

b) The cost to mail a 2 ounce first-class letter.
Answer:

You can earn partial credit on this problem.