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

a). hydrologist
b). toxicologist
c). oceanographer
d). ecologist

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.

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

a is the correct