Question 1190853
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The solution from the other tutor is a very formal mathematical one -- but not very intuitive.<br>
Make it easier....<br>
$420 in 5 days --> $420/5=$84 in 1 day
$84 in one day at $12 per hour --> $84/$12=7 hours per day<br>
ANSWER: 7 hours per day<br>