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Mathematics 21 Online
OpenStudy (anonymous):

Which answer is the most reasonable estimation? Gwen owns an oil-change station. She estimates that she uses 18 cases of motor oil a day. Each case has 24 one-quart bottles of motor oil. About how many quarts of oil does Gwen use in a day? A. about 600 B. about 400 C. about 200 D. about 40

OpenStudy (acxbox22):

28 x 18=432 \[432\approx400\]

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