Use spherical coordinates. Evaluate e x2 y2 z2 dv, where e lies above the cone z = x2 y2 and between the spheres x2 y2 z2 = 1 and x2 y2 z2 = 16.

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose