SOLUTION: After tx years, the number of units of a product sold per year is given by q=170*0.4^0.8t After how many years will the number of units sold per year be 130?

SOLUTION: After tx years, the number of units of a product sold per year is given by q=170*0.4^0.8t After how many years will the number of units sold per year be 130?

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Question 29461: After tx years, the number of units of a product sold per year is given by q=170*0.4^0.8t After how many years will the number of units sold per year be 130?

Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
130=170*(.4^0.8t)
130/170 = (.4^0.8t)...
0.8T*LN(0.4)=LN(0.764706)
0.8T=LN (0.764706)/LN(0.4)=-0.26826/-0.91629=0.292772
T=0.292772/0.8=0.365964.......IS THE ANSWER...
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