Question

要英语过程，解的好的加悬赏！！

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Answer 1

let's say y = 49 + 19 - 14 = 54 ft

z is the distance between the eye and the top of the lighthouse

y = z . sin 30
z = y / sin 30

x is the distance between the ships and the rocks

x = z . cos30
x = y . cos 30 / sin 30
x = 91.8 ft

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22.

Let's say A is the angle
then sinA = 170/2700
= 0.062962962962963
so A = arcsin0.062962962962963

Let's say L is the extra distence to gain 45 elevation
h = 45
then L = 45/sinA
= 714.705m

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还有吗

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现在不空了，我晚上再继续答，其实格式大概就是这样，这些题目也很简单，你不愿意自己试试？

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我试试吧，晚上你再给我发答案对一下，谢谢您，晚上给您采纳