If faheem took 3rd spot for apex legends what is the y=? ?

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

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126