A new element Z was discovered. It formed a compound with sulfur to be Z3N2. What is the oxidation number of element Z in this compound? A) +1
B) +2
C) +3
D) +5
E) +6

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

The verbal translation for the difference of m and 7 increased by 15

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.