Area Unit Conversion
1. We are asked to convert the given areas into appropriate units.
2. Recall the unit conversions for area:
- $1\,\text{dm}^2 = 100\,\text{cm}^2$
- $1\,\text{m}^2 = 10\,000\,\text{cm}^2$
3. For the first problem:
- Given $18.42\,\text{dm}^2$
- Convert to $\text{cm}^2$ by multiplying by 100:
$$18.42 \times 100 = 1842\,\text{cm}^2$$
- The value $184,200$ given is much larger, so likely the unit is $\text{mm}^2$ because:
- $1\,\text{dm}^2 = 10,000\,\text{mm}^2$
- So $18.42\,\text{dm}^2 = 18.42 \times 10,000 = 184,200\,\text{mm}^2$
4. For the second problem:
- Given $874\,\text{cm}^2$
- Convert to $\text{m}^2$ by dividing by 10,000:
$$874 \div 10,000 = 0.0874\,\text{m}^2$$
- The value $0.000874$ is smaller, so likely the unit is $\text{m}^2$ but with a decimal shift:
- Actually, $0.000874\,\text{m}^2 = 8.74\,\text{cm}^2$, so to get $0.000874$ from $874\,\text{cm}^2$, the unit must be $\text{m}^2$ but with a decimal error.
- Correct conversion:
$$874\,\text{cm}^2 = 0.0874\,\text{m}^2$$
5. Therefore, the correct units to fill in are:
- $184,200\,\text{mm}^2$
- $0.000874\,\text{m}^2$ (assuming the problem wants this exact value, it corresponds to $8.74\,\text{cm}^2$ which is not equal to $874\,\text{cm}^2$, so likely a typo or intended to be $0.0874$)
Final answers:
- $18.42\,\text{dm}^2 = 184,200\,\text{mm}^2$
- $874\,\text{cm}^2 = 0.0874\,\text{m}^2$