Mathematics, 15.01.2020 00:31 xxcooleduardo787xx
Average price otis taylor plots the price per share of a stock that he owns as a function of time and finds that it can be approximated by the function
s(t) = t(25-5t)+18,
where t is the time (in years) since the stock was purchased. find the average price of the stock over the first five years.
Answers: 1
![\dfrac{1}{b-a}\int\limits^a_b {t(25-5t)+18} \, dt\\\\ =\dfrac{1}{5}\int\limits^5_0 {25t-5t^2+18} \, dt\\\\ =\dfrac{1}{5}{\dfrac{25t^2}{2}-\dfrac{5t^3}{3}+18t|^5_0 \\\\=\dfrac{1}{5}[\dfrac{25\times 25}{2}-\dfrac{125}{3}+18\times 5]\\\\=\dfrac{1}{5}[312.5-41.67+90]\\\\=72.166](/tpl/images/0455/1696/8f302.png)
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