Tutorial Exercise Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 370 years? Step 1 Let y represent the amount of radioactive radium. Recall the exponential decay model which states that, if C is the initial value then, y = C. c ekt, where k is the proportionality constant and t is the time. Step 2 Find the initial amount of the radioactive radium, that is, find the amount whent = 0. y = k0 Ce C( 370 So, the initial amount of radioactive radium is units. Submit || Skip (you cannot come back)

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.