An object cools according to dT/dt=−0.5(T−20). If T=20°C, then dT/dt equals:
An object cools according to dT/dt=−0.5(T−20). If T=20°C, then dT/dt equals:
- A. 0
- B. −10
- C. 10
- D. 20
Answer: A) 0
Explanation: Substituting T=20 gives dT/dt=0.
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