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hannah has a sink that is shaped like a half-sphere. the sink has a volume of . one day, his sink clogged. he has to use one of two cylindrical cups to scoop the water out of the sink. the sink is completely full when hannah begins scooping.
(a) one cup has a diameter of 4 in. and a height of 8 in. how many cups of water must hannah scoop out of the sink with this cup to empty it? round the number of scoops to the nearest whole number. show all of your work and explain!
(b) one cup has a diameter of 8 in. and a height of 8 in. how many cups of water must he scoop out of the sink with this cup to empty it? round the number of scoops to the nearest whole number. show all of your work and explain!