It seems like your question about the distance is incomplete. However, I can provide you with the time it will take for the zebras to walk to the Sunglasses R Us store.
Given:
- Distance to the store = 500 meters
- Walking speed = 2.1 m/s
To find the time it takes for the zebras to walk to the store, use the formula: \[ \text{Time} = \frac{\text{Distance}}{\text{Speed}} \] Substituting in the values: \[ \text{Time} = \frac{500 \text{ meters}}{2.1 \text{ m/s}} \approx 238.1 \text{ seconds} \]
Therefore, it will take them approximately 238.1 seconds to reach the store. If you meant to ask something else regarding distance, please provide more details!