Answer: 5.5
The alien planet has unfamiliar names for substances and units of measures.
8 quibs of the substance called skwarnick has been obtained.
According to the units of measurement used in the alien planet,
13 quibs equal to 9 sleps
Therefore, 1 quib =
Thus, 8 quibs of skvarnick =
x 8 = 5.5 sleps.
For this reason, 8 quibs of skvarnick in units of sleps is 5.5 sleps.