What is the y-intercept of the graph of the function

In the diagram below what is the approximate length of the minor arc ab

What is the length of an with endpoints a 3,2 and b 8,14

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares