SOLUTION: Shantell is studying for her history test. After 20 minutes she is 1/4 done. How much longer will she study?

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Question 528321: Shantell is studying for her history test. After 20 minutes she is 1/4 done. How much longer will she study?
Answer by boilpoil(127) About Me  (Show Source):
You can put this solution on YOUR website!
1 more hour.
20/1%2F4