In isosceles triangle RST below, what is the value of y? [Not drawn to scale]

380

O 710

1220

1420

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?

How many $20 bills do you need to have to make $280

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply