An exponentially decaying substance was weighed every hour and the results are given below. If the formula 
gives the weight of the substance, Q, at time t in hours since 9 am, then 
=_____ and k=_____. Round k to 2 decimal points. 
Definitions:
Sadness
A natural emotional response to experiences of loss, disappointment, or other upsetting circumstances.
Fear
An emotional response to perceived threats or danger, triggering physiological changes geared towards avoidance or defense.
Disgust
A strong feeling of aversion or profound disapproval.
Giggles
Sudden bursts of short, high-pitched laughs, often uncontrollably and triggered by amusement or nervousness.
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