What type of real number is -6.75

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

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid