At a particular music store, cds are on sale at $12.00 for the first one purchased and $9.00 for each additional disc purchased. maria spends $84.00 on cds. how many cds has maria purchased?

a.6
b.7.
c.8
d.9

Cameron made 1 loaf of bread. his family ate 4/6 of the loaf of bread. how much of the loaf of bread remains? /

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

Someone me! if you’re smart you can solve this!