PLS ANSWER SOON (probably very easy and my brain shut down)

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

What is the measure of sty in oo below? 130 310 230 50

Fifty students are trying to raise at least 12,500 for a class trip. they have already raised 1,250. how much should each student raise on average in order to meet the goal? write and solve the two step inequality for this problem