Question

ted science class collects aluminum cans to sell to the recycling center. the center pays $0.002 for each kilogram of aluminum

Answer 1

Since there is no way to determine what is asked from the given above, I assumed that it is the total earning from the sales of the aluminum cans. To answer, multiply the mass of aluminum cans in kilograms to the price of 1 kilogram of cans. Example, if there are x kilograms of aluminum cans, the total earning would be $0.002x.