table
Number of half-lives 0 1 2 3 4 5 6
the remaining amount of substance (grams) 4,000 2,000 1,000 500 250 125 62.5

which equation best fits the data in the table
A. f(x)=1/2 (4,000)*
B. f(x)= 2,000 (1/2 ) *
C. f(x)= 4,000 (1/2)*
D. f(x)=4,000 (2*)