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Mathematics 21 Online
OpenStudy (anonymous):

The rate for mailing an envelope is $0.80 per ounce. Choose a function rule that represents the total cost, c(w), to mail an envelope weighing w ounces. How much will it cost to mail an envelope that weighs 5 ounces? A. look at the picture; $6.25 B. look at the picture; $.16 C. c(w) = 0.80w; $4.00 D. c(w) = w + 0.80; $5.80

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