6. product a is a 12-ounce bottle of generic mouthwash that sells for $1.39. product b is a 24-ounce bottle of mouthwash that costs $2.79. which is the better buy?

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.