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Precalculus Mathematics Homework Help
What Is the Average Reading Rate for Beth's Day?
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[QUOTE="Mark44, post: 5498977, member: 147785"] If you're thinking that the overall average time is the mean of the two averages, it isn't. A classic problem that shows why this doesn't work is this one. A man drives his car up a mile-long hill at a speed of 30 miles per hour. How fast does he need to go on the return trip downhill to average 60 miles per hour? The naive (and incorrect) answer is 90 miles per hour. [/QUOTE]
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Precalculus Mathematics Homework Help
What Is the Average Reading Rate for Beth's Day?
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