Newton's law of cooling: temperature after a time or time to cool between two temperatures

1. A.
   $60^{\circ}C$
2. B.
   $57^{\circ}C$
3. C.
   $55^{\circ}C$
4. D.
   $53^{\circ}C$.

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1. A.
   1 minute
2. B.
   1.4 minutes
3. C.
   0.5 minute
4. D.
   2 minutes

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1. A.
   $32^{\circ}C$
2. B.
   $30^{\circ}C$
3. C.
   $28^{\circ}C$
4. D.
   $34^{\circ}C$

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1. A.
   $500\text{ }s$
2. B.
   $\frac{25}{3}\text{ }s$
3. C.
   $450\text{ }s$
4. D.
   $420\text{ }s$

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1. A.
   $\frac{14}{3}^{\circ}C$
2. B.
   $\frac{28}{3}\ ^{\circ}C$
3. C.
   $\frac{56}{3}^{\circ}C$
4. D.
   $\frac{42}{3}\ ^{\circ}C$

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1. A.
   $\frac{13}{5}t$
2. B.
   $\frac{10}{13}t$
3. C.
   $\frac{13}{10}t$
4. D.
   $\frac{5}{13}t$

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