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The cost of an LCD TV dropped from $265 in 2012 to $199 in 2014.Find the average rate at which the cost has been decreasing.

Sagot :

The cost of the LCD Tv dropped from $265 in 2012 to $199 in 2014. The average rate at which the cost has been reducing can be calculated below

[tex]\text{Average rate=}\frac{\Delta price}{\Delta time}=\frac{\Delta p}{\Delta t}[/tex]

Therefore,

[tex]\text{Average rate }=\text{=}\frac{265-199}{2}=\frac{66}{2}=33[/tex]

The average rate at which the cost decrease is $33