This makes no sense, math, i need help because this is BS and i don’t get it. there must be something i am missing.

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

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?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2