The area of a parallelogram with a base of 26 meters is 494 square meters. what is the height of the parallelogram

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?

I’m stuck on this equation, anyone got the answer?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.