QUESTION 18 How many square kilometers are equinalent to $$ 28.5 \mathrm{~cm}^{2} $$ ? A. $$ 2.85 imes 10^{-4} \mathrm{~km}^{2} $$ O. $$ 2.85 imes 10^{11} \mathrm{~km}^{2} $$ OC. $$ 285 \mathrm{~km}^{2} $$ O $$ \mathrm{D}_{2.85} imes 10^{-6} \mathrm{~km}^{2} $$ OE. $$ 2.85 imes 10^{-9} \mathrm{~km}^{2} $$

Question

QUESTION 18 How many square kilometers are equinalent to $$ 28.5 \mathrm{~cm}^{2} $$ ? A. $$ 2.85 	imes 10^{-4} \mathrm{~km}^{2} $$ O. $$ 2.85 	imes 10^{11} \mathrm{~km}^{2} $$ OC. $$ 285 \mathrm{~km}^{2} $$ O $$ \mathrm{D}_{2.85} 	imes 10^{-6} \mathrm{~km}^{2} $$ OE. $$ 2.85 	imes 10^{-9} \mathrm{~km}^{2} $$

UpStudy AI · Accepted Answer

To convert $$ 28.5 \, \text{cm}^2 $$ to square kilometers, we need to use the conversion factors between centimeters and kilometers.

1. **Conversion Factors**:
   - $$ 1 \, \text{km} = 100,000 \, \text{cm} $$
   - Therefore, $$ 1 \, \text{km}^2 = (100,000 \, \text{cm})^2 = 10^{10} \, \text{cm}^2 $$

2. **Conversion Calculation**:
   To convert $$ 28.5 \, \text{cm}^2 $$ to $$ \text{km}^2 $$, we can use the formula:
   $$
   \text{Area in km}^2 = \frac{\text{Area in cm}^2}{10^{10}}
   $$

Substituting the known value:
   $$
   \text{Area in km}^2 = \frac{28.5}{10^{10}}
   $$

3. **Performing the Calculation**:
   Let's calculate this value.

$$
\text{Area in km}^2 = 28.5 \times 10^{-10}
$$

This can be expressed in scientific notation as:
$$
\text{Area in km}^2 = 2.85 \times 10^{-9} \, \text{km}^2
$$

4. **Final Answer**:
Thus, the equivalent area in square kilometers for $$ 28.5 \, \text{cm}^2 $$ is:
$$
\boxed{2.85 \times 10^{-9} \, \text{km}^2}
$$

The correct option is **OE. $$ 2.85 \times 10^{-9} \mathrm{~km}^{2} $$**.
The equivalent of $$ 28.5 \, \text{cm}^2 $$ in square kilometers is $$ 2.85 \times 10^{-9} \, \text{km}^2 $$.

Real Tutor Solution

Answer

Solution

Beyond the Answer

Related Questions

Latest Geometry Questions