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Nat2105 [25]
3 years ago
15

Please help me with this problem, 35 points!

Mathematics
2 answers:
patriot [66]3 years ago
7 0

Answer:

64\pi in²

Step-by-step explanation:

I did not ever do a problem like this, however this is the beauty of math, you can easily reverse engineer it.

Remember,

A = \pi r^2

And if we have 4 circles that means the area of one circle is 1/4th the total

So,

A = \frac{\pi r^2}{4}

Assuming that 16 is the radius squared times 4 lets ignore that squared for now because when going backwards we would get rid of the squared last as that was the first step.

A = \frac{16\pi}{4} = \frac{4\pi}{1}= 4\pi

Now lets get it back to r^2 by square rooting the 4

A = \sqrt{4}\pi = 2\pi

The radius of one small circle is 2. Therefore; the diameter would be 4 for each. This in mind we know that two small circles diameters make up the radius of the larger circle we will multiply it by two again.

This gives us a final radius of the bigger circle of 8

Therefore, the area of the bigger circle is 8²\pi which simplifies to 64\pi

And a final answer of

64\pi in²

Hope this helps :)

lbvjy [14]3 years ago
7 0

Answer:

64in                                              

hope it helps

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Answer:

Answer in terms of a trigonometric function :

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Answer in figures

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Step-by-step explanation:

Consider the sketch attached below to better understand the problem.

Let x be the distance between point B and the base of the water tower.

tan (19.9)=\frac{h}{50+x} ---------------equation 1\\

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From equation 2,

x =\frac{h}{tan21.8}=\frac{h}{0.4}

substituting the value of x into equation 1, we get

tan (19.9)=\frac{h}{50+(\frac{h}{0.4} )}

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cross multiplying,

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20tan(19.9)= h(0.4-tan(19.9))

h= \frac{20tan (19.9)}{0.4-tan (19.9)}

The height of the tower is h= \frac{20tan (19.9)}{0.4-tan (19.9)} in terms of the trig function "Tan"

The equation can simply be evaluated to get the answer in figures since the angles are given in the question

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Answer:

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25/100 = 0.25

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