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OpenStudy (anonymous):
The mass of a radioactive element decays at the rate by m(t)=m0e^-rt , where m(t) is the mass at any time t , m0 is the initial mass , and R is the rate of decay . Uranium -240 has a rate of decay of .0491593745 , what is the mass of u-240 left after 10 hours , if the initial mass is 50 grams ? A) 28.54387g B ) 30.58254g C) 32.14286 g D ) 32 . 68034 g
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OpenStudy (freckles):
you just plug in all the info given to you in the that equation \[m=m_0e^{-rt}\] then find the mass m
OpenStudy (freckles):
m0 is the initial that is given in your question (your last line) r is the rate of decay that is given in the second to last line and we want to know m when t is 10 hours
OpenStudy (anonymous):
Which will get the answer of what ?
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