Plz answer this asap

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)