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PLEASE HELP ME ASAP!!! A lighthouse is 210 feet tall and has a beacon with a 36 inch diameter and can be seen for 20 miles. What formula can you use to calculate the distance around the lighthouse?

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Hello this is the formula.
PLEASE HELP ME ASAP!!! A lighthouse is 210 feet tall and has a beacon with a 36 inch-example-1
User Drona
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