To find the deer's speed, you can use the formula for speed:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
Given that the distance is 430 meters and the time is 19.2 seconds, you can calculate the speed as follows:
\[ \text{Speed} = \frac{430 , \text{m}}{19.2 , \text{s}} \approx 22.396 , \text{m/s} \]
Rounding to one decimal place, the speed of the deer is approximately 22.4 m/s.
The closest response to this calculation is:
22.3 m/s (22.3 meters per second)