SOLUTION: A woman asks,"How much for one?" The Vendor says, "30 cents" The woman asks, "How much for 15?" The Vendor says, "60 cents" The woman says, "I need 615." The Vendor says, "Tha

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Question 539695: A woman asks,"How much for one?"
The Vendor says, "30 cents"
The woman asks, "How much for 15?"
The Vendor says, "60 cents"
The woman says, "I need 615."
The Vendor says, "That will be 90 cents."
Show your work and explain how you solved the problem.
This is on my 2nd graders homework. So far we have 1=30, 15=60, 615=90. Can anyone help us solve this?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
She is probably buying house numbers, birthday candles, or something else where each digit costs 30 cents.