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15 November, 13:14

Sammy usually takes a 18 minute shower in the morning. if a 4 minute shower uses an average of 20-40 gallons of water, what is the maximum gallons of water that sammy could be using in her shower?

a. 72 gallons of waterb. 360 gallons of waterc. 90 gallons of waterd. 180 gallons of water

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  1. 15 November, 13:24
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    4 / 40 = 18 / x ... 4 min to 40 gall = 18 min to x gall

    cross multiply

    (4) (x) = (40) (18)

    4x = 720

    x = 720/4

    x = 180 gallons <==
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