The plot below shows the amount of time Josephine spent practicing piano on 4 days Next week, Josephine wants to spend the same total amount of time, but practice the same number of hours each of the 4 days How many hours would Josephine practice each day?

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)

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step-by-step explanation:

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it is 10.6 according to my calculations