The half-life of radium-226 is 1590 years. if a sample contains 500 mg, how many mg will remain after 4000 years?

87.43 mg

Step-by-step explanation:

Let the decay rate of Radium-226 is r% annually.

So, we can write the equation of decay as ....... (1) where, x is final amount after decay of t years and P is initial amount of radium-226.

Hence,

⇒

⇒

Now, we have to calculate the remaining amount of Radium-226 after 4000 years if the initial amount is 500 mg.

So, we can write mg. (Answer)

step-by-step explanation:

this woman was an important writer and propagandist during the american revolution. she was a member of the committee of correspondence (in fact the committee was formed in her home) and was an advisor to many of the revolutionary leaders, including george washington and john adams. who was this revolutionary woman?

where r the answers

step-by-step explanation: