Find the area of the trapezoid.
10.2 cm
12.2 cm
12.6 cm

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)

step-by-step explanation:

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the answer is  

d.

21

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