The price of a commodity increases by 25% in January. There is a subsequent 25% increase in its price in February. If a person used to get 1 unit of the commodity for $x in December, how many units of the commodity will he get for $2x in February?
agree with D
in Jan, it costs 1.25x per unit
in Feb, it cost (1.25x)*1.25 per unit ----> (1.25^2) * x
in Feb, x dollars purchase 1/(1.25^2) of 1 unit
2x dollar = 2 * 1/(1.25^2) = 1.28 units
I am not sure why the answer choices are in x's