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You descend 170 feet before ascending 72 feet. There is another 88 foot drop followed by a 40 foot climb. Then you ascend another 50 feet. What is your elevation after the last change in elevation.

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Pinkster104id
Ok so descend means to go down and ascend means going up. With that in mind, you know what operations to use. You start at -170 and then climb up 72 feet. 170-72= 98. Now you drop -88. 98-88=10 go up 40 next 10+40= 50. Lastly, you go up by 50 feet. 50+50=100 which means your current elevation is 100 feet. I hope this helps you :)

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