It moves 13 meters in the first two seconds, backtracks 9 meters in the next 4 seconds, then moves forward 5 meters in the last 4 seconds. The total distance traveled is ...
13 m + 9 m + 5 m = 27 m
_____
In the first interval, the object moves from 1 m to 14 m away from the position reference, hence a move of 13 meters.
A: For each 1 degree Celsius that temperature decreases, the speed of sound decreases by 0.6 m/s. So sound travels through dry, -20 °C air at a speed of 319 m/s
