What is the constant of proportionality for the relationship between the length of the arc intercepted by a 80° angle and the radius of the circle

What is the exact volume of the cylinder? 16in going into the middle of the top of the cylinder and 40in in height a) 25,600(pi)3 b)10,240(pi)3 c)1280(pi)3 d)640(pi)3

1foot = 12 inches; 1 yard = 3 feet

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9