For Exercises 87-90, use the Tangent feature from the DRAW menu to find the rate of change in part (b).
Depreciation. Pelican Fabrics purchases a new video surveillance system. The value of the system is modeled by
a. Use the model to estimate the value of the system 5 yr after it was purchased.
b. What is the rate of change in the value of the system at the end of 5 yr?
c. When will the system be worth half of its original value?
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