I'm trying to simplify this 5th grade math (14+5)+15÷3 solve and explain.

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?

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)