Do them and explain how to find speed..
will give brainlest

Two critical interventions to turn around the opioid crises are:

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?