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?
Source: Questions from the AGIEval benchmark's SAT subsets, derived from pre-2016 College Board SAT exams.
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These items follow the pre-2016 paper SAT format and do not reflect the current digital SAT. Useful as a benchmark set, not as current test preparation.
id agieval_sat:30ec37e97808273489f34e63374a303c
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