arithmetic sequence decreases by adding or subtraction a number exg 2,4,6,8
geometric sequence is mu;ltipliying or dividing by a number exg
2,4,8,16,32 etc
so it from 64 to 4 then to 1/4
64/16=4
4/16=1/4
it decreases by a factor of 1/16
it is geometric
th enaswer is B