1. the valley was very steep. 2. the misty air made it hard to see
Answer:
Measuring water usage.
Explanation:
Account does not mean testing, finding, or fixing, so the answer is most likely measuring water usage. I also took a test on this.
speed of sound (m/s) = 331.5 + 0.60 T(°C) For example, the speed of sound in air is 386 m/s at 100 °C. The sound of speed in air is increased by 0.60 m/s for each increase of degree in air temperature. The speed of sound is faster at higher temperatures because molecules collide more often.
Unnecessary words: 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 16,
