You very much ! don't forget to show your work .

10.  angle APB = (1/2) arc AB
       108 = (1/2) arc AB
       multiply both sides by 2 to clear the fraction
       216 = arc AB

11.  Area of regular Octagon s = 5 in
       A = (P * apothem)/2  => => If you divide the octagon into 8 triangles, the apothem is the perpendicular height of the triangle.
       A = (5 * 8 * 6)/2
       A = 120 in^2
        
       Area of regular Hexagon s = 5 in
       A = (5 * 6 * 4.3)/2
        A = 129 in^2

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8