Conversion of Units

The dimensions of a rectangular island are $3.8 \mathrm{km}$ and $2.4 \mathrm{km}$. Find the area of the island in hectares.

Convert: $1000 {\mathrm{m}}^2$ to hectares.

Convert: $3 \mathrm{acre}$ to ${\mathrm{cm}}^2$

Convert: $100 {\mathrm{cm}}^2$ to ${\mathrm{mm}}^2$. If the result is $x {\mathrm{mm}}^2$, then find the value of $x$.

Convert: $50 {\mathrm{m}}^2$ to ${\mathrm{cm}}^2$. If the result is $x {\mathrm{cm}}^2$, then find the value of $x$.