Pls help I am confused

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Given: ac and db are diameters. m∠3=

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