How do (vending, change) machines know the difference between a $1 and a $5,$10 and $20 does the machine see something we don’t? I mean they’re the same size, they just have different things printed on them. How does the machine know? websites welcome Bookmark It Hide Sites

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I’m doing a research project and we need to interview someone about our topic. My topic is banning soda and junk food in schools and I was hoping some principals or teachers could give detailed responses to these questions…thank you! 1) Do you believe childhood obesity is a problem today? 2) Do you think pop [...]

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