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matrenka [14]
3 years ago
8

4.

Mathematics
1 answer:
tiny-mole [99]3 years ago
8 0

Answer:

7

Step-by-step explanation:

7 =2 hx x e

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An electric pole is 10m high if it's shadow is 10×√3 in length find the elevation ofthe sum
lianna [129]
First, Look at the attached picture as a reference.

Now, using Pythagoras theorem, 

AC^2=AB^2+BC^2 \\\\AC=\sqrt{AB^2+BC^2 }\\\\AC=\sqrt{10^2+(10\sqrt3)^2}\\\\ AC = \sqrt{100+300}\\\\AC=\sqrt{400}\\\\AC=20~in.

Now, lets find the elevation of the sun.

<span> </span>tan\theta =  \frac{AB}{BC} \\\\ tan\theta =  \frac{10}{10\sqrt3} \\\\ \theta = tan^{-1} \left(\frac{10}{10\sqrt3}\right) \\\\ \boxed{\theta = 30  \°}

∴ The elevation of the sun is 30°

 

6 0
3 years ago
Please help me with the questions
Tcecarenko [31]

Step-by-step explanation:

Since, diagonal of a parallelogram bisects it in two triangles of same area.

Hence, area of parallelogram ABCD will be twice the area of triangle ABD.

area \: of \:  { \parallel}^{gm}  \: ABCD  \\ = 2 \times A(\triangle ABD)  \\  = 2 \times 40 \\  = 80 \:  {m}^{2}

5 0
3 years ago
Consider the two functions given below. What is the y-intercept of g? A. (0,14) B. (0,4) C. (0,9) D. (0,-5)
SSSSS [86.1K]

Note: You probabily forgot to mention the two function. While after some research, I was able to find two functions based on which I would like to solve your query.

Answer:

The y-intercept of the equation will be (0, 4).

Step-by-step explanation:

Considering the assuming functions f(x) and g(x).

f(x) = -3x - 5

g(x) = f(x)+9

So,

g(x) = (-3x-5)+9     ∵ g(x) = f(x)+9

g(x) = -3x+4  

Now, finding the y-intercept

so putting x = 0 in function g(x)

g(x) = -3(0)+4

g(x) = 0+4

g(x) = 4

Therefore, the y-intercept of the equation will be (0, 4).

3 0
3 years ago
What is the area of the triangle shown?
oee [108]

Answer:

6

Step-by-step explanation:

4 units x 3 units = 12 units / 2 to get a triangle

6 0
2 years ago
Read 2 more answers
Find the value of a. Round to the nearest tenth, if necessary. 11 24 a​
Masja [62]

Answer:

21.3

Step-by-step explanation:

It's easier to see how to do this if you transfer the 11 to the bottom of the rectangle. The look at the left triangle. It has 3 sides.

24, 11, and a.

You should be able to find a using

a^2 + 11^2 = 24^2     Expand the squares

a^2 + 121 = 576         Subtract 121 from both sides

a^2 = 576 - 121

a^2 = 455                  Take the square root of both sides.

sqrt(a^2) = sqrt(455)

a = 21.33

or

a = 21.3

3 0
3 years ago
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