Final answer:
After releasing air from his balloon for 4 seconds at a rate of -2.5 meters per second, Ron's altitude changes by -10 meters, resulting in a new altitude of 560 meters.
Step-by-step explanation:
To find the change in altitude for Ron's hot air balloon, we use the information that the altitude changes by -2.5 meters every second for 4 seconds. The equation for the change in altitude (Δh) is:
Δh = rate × time
In this case, the rate of change is -2.5 meters/second, and the time is 4 seconds. So,
Δh = (-2.5 m/s) × (4 s)
Δh = -10 meters
This means that Ron's altitude decreases by 10 meters.
To find the new altitude, we subtract the change in altitude from the original altitude:
New Altitude = Original Altitude + Change in Altitude
New Altitude = 570 m + (-10 m)
New Altitude = 560 meters
Therefore, Ron's new altitude after releasing air for 4 seconds is 560 meters above ground level.