Ivanna needs to memorize words on a vocabulary list for german class. she has memorized 18 of the words, which is two-thirds of the list. how many words are on the list? ivanna needs to memorize words on a vocabulary list for german class. she has memorized 18 of the words, which is two-thirds of the list. how many words are on the list?

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)

false

step-by-step explanation:

rulers and compasses arent required in order to bisect an angle because when bisecting angles, you're making a "half circle" and considering in order to bisect an angle it wouldn't be straight, you wouldn't need either of the two