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Find number abc

If ab9ca + 6ba9c = 1c5acb find number abc. Multiple solutions may exist.

Correct answers: 0

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I hired a zombie to...

“I hired a zombie to do some work around my house. He is the working dead.”

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Photophone

In 1882, the photophone was demonstrated by Alexander Graham Bell and Charles Sumner Tainter. In their device, a mirrored silver disc was made to vibrate by speech from a speaking tube. Light reflected off the disc was focused by a parabolic dish onto a selenium photocell. The variations in the reflected light were converted into electrical signals carried to headphones.

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