What is the value of sineo in the diagram below?

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x