Acircle has an area of 78.5 square inches. what is the radius of the circle?

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

Identify the number 127 as a rational or irrational. explain