To convert the degree to radian use this rule
[tex]x(radian)=\frac{x^{\circ}}{180}\times\pi[/tex]Substitute x by 489 and pi by 22/7
[tex]\begin{gathered} x(radian)=\frac{489}{180}\times\frac{22}{7} \\ \\ x(radian)=8.53 \end{gathered}[/tex]The answer is 8.53 radians the 3rd choice
