HELP PL ASAP What is the value of Left-bracket (two-thirds) Superscript 0 Baseline Right-bracket Superscript negative 3

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

I'll give brainliest if you answer right : )

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?