Okay, the question I'm suppose to answer is:(adsbygoogle = window.adsbygoogle || []).push({});

If the attenuation coefficent of Al is 1.73/cm for soft-xrays, what percentage of X-rays penetrate a piece of lead 3.00mm in thickness

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What I seem to have is

I = Io*e^(-ux)

I believe u = 1.73/cm and x = 3.00mm.

My 3 questions are:

1) Am I going in the correct direction?

2) How do I determine what Io be? (soft x-rays?)

3) Can someone point me to the FAQ for the equation editor?

Thanks in advanced.

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# Soft x-rays

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