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Mathematics 42 Online
OpenStudy (anonymous):

one layer of earth's atmosphere is called the stratosphere. At one point above earth's surface the stratosphere extends from an altitude of 16 km to an altitude of 50 km. Write a compound inequality to show the altitudes that are within the range of the stratosphere. (please show work! i really need to know how to figure out these word problems. thanks!)

OpenStudy (anonymous):

If you're talking about the range of the stratosphere, isn't it just what you told us -- between 16 and 50? This means that if you made the stratosphere = x, then, since the stratosphere starts at an altitude 16 km: \[16 \le x\] and since the stratosphere ends at an altitude of 30 km: \[x \le30\] If you combine the two of them, you get: \[16 \le x \le30\] So the range of the stratosphere is from 16 to 30 km. Let me know if you need more help with this question.

OpenStudy (anonymous):

I think im good now! that's really helpful, thanks!(:

OpenStudy (anonymous):

No problem! Glad to hear that I was able to help :D

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