Me , this homework is due tomorrow and my teacher is insane. needed.

2 4/5 - 2/3

To subtract the fractions, make the fractions have common denominators.

Multiply 4/5 by 3/3 and multiply 2/3 by 5/5.

Rewrite the expression with the fractions as common denominators.

2 12/15 - 10/15

Subtract the fractions; subtract the numerators and keep the same denominators.

2 2/15 is your answer.

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)

true

step-by-step explanation: