Compare |−1.37| and |1.21|. a) |−1.37| > |1.21| b) |−1.37| < |1.21| c) |−1.37| = |1.21| d) |−1.37| ≤ |1.21|

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

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?

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30