Question

The cost to mail a letter with the United States Postal Service is calculated by the weight of the letter in ounces and is given by the equation c = 0.21(x − 1) + 0.50. What does the value 0.50 most likely represent?

A) The cost, in dollars, to mail a one ounce letter
B) The cost, in dollars, to mail an additional ounce.
C) The average weight, in ounces, of a letter.
D) The total weight, in ounces, of a letter.

Answer 1

The variable x is the weight of the letter and they subtract 1 from that, so adding the 0.50 at the end of the equation would be the cost for a one ounce letter.

The answer is:

A) The cost, in dollars, to mail a one ounce letter