a cell phone company charged 49.95 per month plus 0.05 per call minute i used 200 call minutes last month proportional or not proportional

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?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Bring the fraction a/a-4 to a denominator of 16-a^2