If f(x)=x^3-2x^2 which expression is equivalent to f(i)

John bought 2 horses at rs 20000 each

My math teacher told my class to "steal" a 6th grade fraction word problem from the internet, word problems? : -p requirements: only a 1 step word problem. needs to be complex.

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.