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Marizza181 [45]
2 years ago
15

Which is the value of the expression when n=3

Mathematics
1 answer:
alekssr [168]2 years ago
7 0

Answer:

n=3

Step-by-step explanation:

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An opaque cylindrical tank with an open top has a diameter of 3.25 m and is completely filled with water. When the afternoon Sun
kicyunya [14]

Answer:

10.69

Step-by-step explanation:

We must first know that the angle of refraction is given by the following equation:

n_water * sin (A_water) = n_air * sin (A_air)

where n is the refractive index, for water it is 1.33 and for air it is 1.

The angle (A) in the air is 22.8 °, and that of the water is unknown.

Replacing these values we have to:

1.33 * sin (A_water) = 1 * 0.387

sin (A_water) = 1 * 0.387 / 1.33

A_water = arc sin (0.2907) = 16.9 °

now for the tank depth:

h = D / tan (A_water)

D = 3.25

Replacing

h = 3.25 / tan 16.9 °

h = 10.69

Therefore the depth is 10.69 meters.

6 0
3 years ago
What is the value of 1/3 +7x, when x = 5
CaHeK987 [17]
1/3 + 7x = 1/3 + 7(5 )=
1/3+35
=1/3 + 105/3 =
106/3=
35 1/3
3 0
3 years ago
Read 2 more answers
Which expression is equivalent to 2(3 - x) - 12 + 4x
iragen [17]
You would distribute then combine like terms to get your answer.

3 0
3 years ago
A bag contains white marbles and red marbles, 90 in total. The number of white marbles is 6 less than 5 times the number of red
Gelneren [198K]

Answer:

W = 72

Step by step explanation:

White = W

Red = R

W + R = 90

Write an equation

W = 5R - 6

Substitute

5R - 6 = 90

Add 6 to both sides of the equation

5R = 90

Simplify

90 ÷ 5 = 18

R = 18

90 - 18 = W

W = 72

Hope this was useful to you!

8 0
3 years ago
Find the missing angle
tatuchka [14]
M 1: 64
M 2: 49
M 3: 87
M 4: 44
5 0
3 years ago
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