Round to the underlined place value: 6.739 (underlined one is 7) 6.6 6.8 6.7 6.9

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?

Me. i can't figure out this question. give an explanation too. .

What is the solution to the equation below? 3/x-2+6=square root x-2 +8