SOLUTION: To mail a first class letter, the U.S. Postal Service charges $0.49 for the first ounce and $0.21 for each additional ounce. Write a function that represents the total cost, in do

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Question 1168863: To mail a first class letter, the U.S. Postal Service charges $0.49 for the first ounce and $0.21 for each additional ounce. Write a function that represents the total cost, in dollars, of a letter of w weight in ounces. Now suppose it costs $1.12 to mail your letter. How many ounces does your letter weigh?

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
equation would be y = .28 + .21 * x for x = integer >= 1
x = number of ounces.
y = total cost

if x = 1, cost is .28 + .21 * 1 = .49
if x = 2, cost is .28 + .21 * 2 = .70
if x = 3, cost is .28 + .21 * 3 = .91
etc.

to find the cost for mailing a letter, calculate the number of ounces and then use the equation to find the costs.

if you want to send 4 ounces, the cost would be y = .28 + 4 * .21 = 1.12