The number of hours, H, that milk stays fresh is a function of the surrounding temperature, T. In degrees centigrade, this relationship is shown by the formula H(T) = 180 ∙ 10(−.04T) . How many hours will newly pasteurized milk stay fresh when stored at 8°C?

which type of environmental scientists is likely to study methods of water conservation and decontamination?

Answer is Hydrologist.

Hydrologists are those scientists, who research on the properties of underground as well as surface waters. They also research in the field of distribution and circulation of water. They also collect water samples to test for certain properties, such as the pH or pollution levels thus help in keeping the water clean.