chord ab subtends two arcs with measures in the ratio 1 5 line l is a tangent to circle point b. find the measure of the angle between the tangent and secant ab

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?