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1 year ago

8

Janelle randomly surveyed 50 students. She found that 42 of the students had been to a music concert. There are 2,870 students a

t the school. Based on her survey, about how many students in the school have been to a music concert?
A.
2,410

B.
157

C.
2,157

D.
2,820

2 answers:

emmainna [20.7K]1 year ago

7 0

D because if u subtract 2870-24 you get 2,828 and it says about how many so to round it off you would get 2,820 so the answer is d

Sergio [31]1 year ago

5 0

The answer should be C

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If point is the interior of <AOC ,
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Answer:

$NM = x$

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Step 1: Pythagoras Theorem

Pythagoras theorem relates the three sides of the triangle in such a way that the sum of the square of base and perpendicular is equal to hypotenuse, such as:

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Step 2: Trigonometric Functions

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Step 3: Verifying all the possible answers

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we can calculate

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therefore, NM = x (true)

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C: Using Pythagoras Theorem

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It can also be proved using trigonometric relation

$cos (45) = \frac{x}{LM}$

$LM = \frac{x}{cos (45)}$

As, $\frac{1}{cos (45)}= \sqrt{2}$

Therefore

$LM = x\sqrt{2}$

D and E:

Using same approach similar to part A

Since, LN = x and NM = x

we can calculate

$tan (\theta)= \frac{opposite}{adjacent}$

$tan (45)= \frac{x}{x} =1$

Therefore, $tan (45) = 1$ and not equal to $\frac{\sqrt{2} }{2}$

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