Find the orthocenter for the triangle described by the set of vertices. A (5,2), B (9,-6), C (3, 2)

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

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?