Energy Consumption Rate of Change

Question

The function $$E(t)=800\ln(t+1)$$ models the energy consumption of a city in kilowatt-hours (kWh), where $$t$$ is the time in years. What is the instantaneous rate of change of energy consumption at $$t=4$$?

Accepted Answer

$$\frac{dE}{dt}\Big|_{t=4} = \frac{800}{5} = 160 	ext{ kWh/year}$$

Answer

$$200 	ext{ kWh/year}$$

Answer

$$400 	ext{ kWh/year}$$

Answer

$$800 	ext{ kWh/year}$$

Energy Consumption Rate of Change

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