While visiting Yosemite National Forrest, Joe approximated the angle of elevation to the top of a hill to be 40 degrees. After walking 450 ft closer, he guessed that the angle of elevation had increased by 18 degrees. Approximately how tall is the hill?
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At position B, Joe is (x - 450) ft from the foot of the hill. His angle of elevation is 40 + 18 =
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