you use cubic measurements
hopes this helps
Not sure what index form is but
48=2 times 2 times 2 times 2 times 3
this is also
48=2^3 times 3
This sequence (1.6, 0.8, 0.4, 0.2,... ) is geometric.
We have formula for any member of geometric sequence:

If a1=1.6 then:

The solution for all these equations is: q=0.5. We have: a1=1.6, q=0.5 and this is geometric sequence.
A., B., C., D., are NOT true. I think this is a trick question. Lol