I Just Looked It Up Myself And Found This Website, It Says How To Do It.... http://www.instructables.com/id/Using-a-clinometer-to-measure-height/
Hope That Answers Your Question. If Not I Can Try To Help More
To turn a percent to a decimal you divide by 100, so 5.25 / 100 is .0525
Answer:
X=-4
Step-by-step explanation:
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