A glacier moves about 12 inches every 36 hours. About how much does it move in one week?

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Do I do : 12/36= x/week ( in hours )
OR
24x7 divided by 36 + 12 ( that's what my mom said to do but idk )
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PLEASE RESPOND ASAP. THIS IS DUE 2/13/14 OR 1/14/14 IN CASE OF SNOW DAY. Thanks (:

3 answers

I meant 2/14/ 14.. Not January. . Sorry!
(12in/36 hr)* (24*7 hr/wk) = 56 in/wk
Thank you Damon!