Puiyyun have?
36.
two interior angles of a pentagon measure 80° and 100°. the other three
angles are congruent. find the measure of each of the three angles.

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)

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation:

the answer is 8/21

hope this