#3. In 2013, the United States Postal Service charged $0.46 to mail a letter weighing up to 1 oz. and $0.20 per ounce for each additional ounce. a) Which equation can be used to determine the cost, in dollars, C), of mailing a letter weighing z ounces where z is an integer greater than 1? Highlight your choice. Then, Explain.

1) C = 0.46z + 0.20 3) C = 0.46(z − 1) + 0.20

2) C = 0.20z + 0.46 4) C = 0.20(z − 1) + 0.46

Explanation:

b) Suppose Mr. Cromer spent $2.66 mailing a letter to the Superintendent. Using your equation from part (a), determine how many ounces the letter package weighed.

Solve your equation from (a)

Check your solution.

Write a summary statement explaining your solution in the context of the problem.

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