This is decay because the base of the exponential is < 1 ( 0.8).
Limit of the function as x approaches infinity is 0
Answer:
I think the temperature went down 86° but I'm not sure
Assignment: 
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Answer: 
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Explanation: 
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[ Step One ] Factor out common term 

[ Step Two ] Factor 
\left(4x\right)^2-1^2
[ Step Three ] Rewrite equation

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Here is the work! The zeros of the graph are at -1 and 3