Does anyone know the answer to this question?

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

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)

Is the point (0, 8) on the x-axis or y-axis? how do you know?