Chapter 28, Problem 68EAP

II A circuit you're using discharges a $\text{2}0\mu \text{F}$ capacitor through an unknown resistor. After charging the capacitor, you close a switch at $t=0$ s and then monitor the resistor current with an ammeter. Your data are as follows:

Time (s)	Current $\left(\mu \text{A}\right)$
0.5	890
1.0	640
1.5	440
2.0	270
2.5	200