Question 986267
 The higher you are, the further. you can see to the horizon (assuming there is nothing blocking your line of sight). The formula for this is D= (25 sqrt h)/7
where D is the distance you can see (in kilometers) , and h is how high your eyes are above sea level (in metres) 
i) How far can you see if you are on a hillside looking out to see and your eyes are 36 metres above sea level? Give your answer o 2 d.p
D = (25sqrt(h)/7
D = 25sqrt(36)/7
D = 25*6/7
D = 21.43  km
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ii) Rearrange the formula D=(25 sqrt h)/7 to make h the subject.
7D/25 = sqrt(h)
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h = sqrt(7*D)/5
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Cheers,
Stan H.
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