A circle with the radius of 2cm sits inside a circle with the radius of 4cm.
What is the area of the shaded region?
Round your final answer to the nearest hundredth.

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Yahir designs bracelets. he uses between 9 and 15 red and yellow beads in the ratio of 2 red bead to 5 yellow beads. drag the beads into the container to meet these requirements

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?