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8 ken is working this summer as part of a crew on a farm. he earned $8 per hour for the first 10 hours he worked this week. because of his performance, his crew leader raised his salary to $10 per hour for the rest of the week. ken saves 90% of his earnings from each week. what is the least number of hours he must work the rest of the week to save at least $270 for the week?
Sagot :
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