Rate of change proportional to the square root of the amount: time to empty

1. A.
   $\frac{10}{3}$
2. B.
   $\frac{10}{9}$
3. C.
   $\frac{20}{9}$
4. D.
   $\frac{20}{3}$

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1. A.
   0
2. B.
   0.25
3. C.
   0.5
4. D.
   3

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1. A.
   3 years
2. B.
   5 years
3. C.
   4 years
4. D.
   6 years

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1. A.
   $\frac{20}{3}$ years
2. B.
   $\frac{10}{3}$ years
3. C.
   $\frac{10}{9}$ years
4. D.
   $\frac{20}{9}$ years

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1. A.
   4 years
2. B.
   6 years
3. C.
   8 years
4. D.
   10 years

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1. A.
   $2\dfrac{2}{9}$
2. B.
   $2\dfrac{2}{7}$
3. C.
   $2\dfrac{2}{5}$
4. D.
   $2\dfrac{2}{3}$

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