SOLUTION: from 1990 to 1998 the manufacturer's shipments for audio cassettes A (in millions) and compact discs C (in millions) can be modeled by the equations:
A=-31.8t+322
c=428.8t+110
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Question 994020: from 1990 to 1998 the manufacturer's shipments for audio cassettes A (in millions) and compact discs C (in millions) can be modeled by the equations:
A=-31.8t+322
c=428.8t+110
where t is the number of years since 1990. During what year did the number of compact discs shipped surpass the number of audio cassettes shipped?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
The point where the two graphs meet is the year, if one looks at t.
-31.8t +322=428.8t + 110
460.6 t= 212
t=0.460. This would be in mid-1990. I wonder if the numbers were copied correctly, but with those equations, that is the value.
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