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Can someone please explain how to do this question because I am having a difficult time trying to figure it out. An answer with an explanation would be nice. Thank you.​
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Can someone please explain how to do this question because I am having a difficult time trying to figure it out.

An answer with an explanation would be nice. Thank you.​

Can someone please explain how to do this question because I am having a difficult-example-1
User Robby Shaw
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the answer is B
Explanation: 4/5 of an hour is .8 of an hour 90 minutes is 1.5 hours. .8+1.5+1.7= 4. therefore, the answer is 4 hours
User Serpiton
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