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Mariulka [41]
10 months ago
7

A bullet is found embedded in the wall of a room 2.2 m above the floor. The bullet entered the wall going upward at an angle of

15°. How many metres from the wall was the bullet fired if the gun was held 1.1 m above the floor? (Round your answer to two significant digits.)
Mathematics
1 answer:
soldi70 [24.7K]10 months ago
7 0

The distance from the wall was the bullet fired if the gun was held 1.1 m above the floor will be 4.25 meters.

<h3>What is trigonometry?</h3>

Trigonometric functions examine the interaction between the dimensions and angles of a triangular form.

A projectile is tracked down and implanted in the mass of a room 2.2 m over the floor. The shot entered the wall going vertically at a point of 15°.

Because the gaps are so low and the bullet's speed is so high, we may treat the bullet's route as a straight line.

The distance is given as,

⇒ (2.2 - 1.1) / sin 15°

⇒ 1.1 / sin 15°

⇒ 4.25 meters

The distance from the wall was the bullet fired if the gun was held 1.1 m above the floor will be 4.25 meters.

More about the trigonometry link is given below.

brainly.com/question/22698523

#SPJ1

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The standard IQ test is designed so that the mean is 100100 and the standard deviation is 1515 for the population of all adults.
Natalija [7]

Answer:

The sample size should be approximately 151.      

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 100

Population standard deviation, σ = 15

We have to evaluate the sample size, n.

Alpha, α = 0.10

Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64

100 \pm 1.64(\frac{15}{\sqrt{n}} ) = (98,102)

100 \pm 1.64(\displaystyle\frac{15}{\sqrt{n}} ) = (98,102)\\\\1.64(\frac{15}{\sqrt{n}} ) = 2\\\\n = 151.29 \approx 151

Thus, the sample size should be approximately 151.

6 0
2 years ago
Solve the riddle.
Elena-2011 [213]

Answer:

✔ 9

Step-by-step explanation:

Assignment Egde 2021

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4 0
2 years ago
2.4m log is cut into lengths into the ratio 7 : 5. Find the longer length in cm.
sergeinik [125]

Answer:

140 centimeters.

Step-by-step explanation:

Hello!

A 2.4 meter log is split into the ratio 7:5. Each unit part is one x-increment, so the log is split into 7 x-increments and 5 x-increments.

Find the longer length:

  • 2.4 into 7:5
  • 2.4 = 7x + 5x
  • 2.4 = 12x
  • x = 2.4/12
  • x = 0.2

Now, we must find the longer length, 7x.

  • 7x
  • 7(0.2)
  • 1.4

The longer length is 1.4 meters, but we want it in cm.

There are 100 centimeters in a meter.

  • 1.4 meters = 1.4 * 100
  • 1.4 meters = 140 centimeters

The longer length is 140 centimeters.

7 0
1 year ago
Please solve...Thanks
liberstina [14]
Micheal has 40ft of fencing for the rectangular dog run. So the perimeter of the dog run is 40ft.

Perimeter=40ft

The perimeter of a rectangle is:

P=2l+2w

Since we know the length is 5 and the perimeter is 40, we can solve for the width.

P=2l+2w
40=2*(5)+2w
40=10+2w
subtract 10 from both sides
30=2w
divide both sides by 2
15=w

The width of the fence is 15feet.

3 0
3 years ago
It’s not 3 but still need help with it
Leto [7]

Answer:

13

Step-by-step explanation:

5-(-8)=13

6 0
2 years ago
Read 2 more answers
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