To determine the most appropriate unit of measurement for the mass of the ambulance, we first need to convert the mass from ounces to a more useful unit.
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Convert ounces to pounds: There are 16 ounces in a pound.
\[ \text{Mass in pounds} = \frac{5.44 \times 10^5 \text{ ounces}}{16} \approx 3.4 \times 10^4 \text{ pounds} \] -
Convert pounds to tons: There are 2000 pounds in a ton.
\[ \text{Mass in tons} = \frac{3.4 \times 10^4 \text{ pounds}}{2000} \approx 17 \text{ tons} \]
Given that the mass of the ambulance is substantial (approximately 17 tons), the most appropriate unit of measurement for this mass is tons.
So the correct response is tons.
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