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Nadya [2.5K]
3 years ago
11

An electric pole is 10m high if it's shadow is 10×√3 in length find the elevation ofthe sum

Mathematics
1 answer:
lianna [129]3 years ago
6 0
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°

 

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Eric was rock climbing. At one point, he stopped and climbed straight down 2\dfrac{1}{2}2
nikitadnepr [17]

The equation that matches the given situation is -2\frac{1}{2}+6\frac{3}{4}=? . So, after two moves, Eric's elevation changed 4\frac{1}{4} meters above.

We know that in mathematics, subtraction means removing something from a group or a number of things. What is left in the group gets smaller when we subtract. The minuend is the first element we use. The subtrahend is the part that is being removed. The difference is the portion that remains after subtraction.

Assume that "negative" means climbing down and "positive" means climbing up. We must locate the elevation change in this area.

Given that Eric climbed straight down 2\frac{1}{2} meters. So we can write -2\frac{1}{2}.

Again Eric climbed straight up 6\frac{3}{4} meters. So, we can write 6\frac{3}{4}.

Then the change = -2\frac{1}{2}+6\frac{3}{4}

=-\frac{(2*2+1)}{2}+\frac{6*4+3}{4}

=-\frac{5}{2} +\frac{27}{4}

=\frac{-(5*2)+27}{4}

=\frac{-10+27}{4}

=\frac{17}{4}

=\frac{4*4+1}{4}

=4\frac{1}{4}

Therefore, the equation that matches the given situation is -2\frac{1}{2}+6\frac{3}{4}=? . So, after two moves, Eric's elevation changed 4\frac{1}{4} meters above.

Learn more about subtraction here -

brainly.com/question/24116578

#SPJ10

7 0
1 year ago
Can someone please answer 2 for me? I really need help for my quiz.
ra1l [238]
1 cup would be the answer
8 0
3 years ago
Part 2 of my first question.
azamat

Answer:

Step-by-step explanation:

integer=8

negative fraction=1/2

positive fraction=1/9

negative decimal=0.4

positive decimal=0.8

5 0
3 years ago
What is the equation for x+1, x+2, x+3
arlik [135]
<span>Hello there.

What is the equation for x+1, x+2, x+3

</span><span>4x</span>+<span>3</span>
4 0
3 years ago
11, 12, and 13 please help
castortr0y [4]

Answer:11 is q2 12 is 3/4

Step-by-step explanation:

5 0
2 years ago
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