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777dan777 [17]
2 years ago
11

I WILL MARK BRAINLIEST

Mathematics
1 answer:
ICE Princess25 [194]2 years ago
5 0
First one is : D (6)
Second one is : B (1/3)

Hope this helps!
Please give Brainliest!
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What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 4
Tamiku [17]

Answer:

The ratio of the intensities is roughly 6:1.  

Step-by-step explanation:

The intensity I() of an earthquake wave is given by:

I = \frac{P}{4\pi d^{2}}

<em>where P: is the power ans d: is the distance. </em>

Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:

\frac{I_{1}}{I_{2}} = \frac{P/4\pi d_{1}^{2}}{P/4\pi d_{2}^{2}}

<em>where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km     </em>

\frac{I_{1}}{I_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}

\frac{I_{1}}{I_{2}} = \frac{46 km^{2}}{19 km^{2}}

\frac{I_{1}}{I_{2}} = 5.9:1

Therefore, the ratio of the intensities is roughly 6:1.  

 

I hope it helps you!    

3 0
3 years ago
A train travels 250 miles at a constant speed (x) in miles per hour.write an equation that can be used to find the speed of the
77julia77 [94]

Answer:

use this

Step-by-step explanation:

velocity = distance / time…. So distance = velocity x time

8 0
3 years ago
You work in a chemical lab. Last quarter, you successfully completed an average of about 5 chemical analyses per day. This quart
Kryger [21]

Answer: 60%

Step-by-step explanation:

Since, According to the question,  Last quarter, we successfully completed an average of about 5 chemical analyses per day.

Therefore initially our average = 5 chemical analyses per day.

Again, From the question, This quarter, we have increased this average to about 8 per day.

Therefore New average =chemical analyses 8 per day

Thus, Percentage change in the average = (Initial average - New average)×100/ initial average  

= \frac{8-5}{5} \times 100

= \frac{3}{5} \times 100

= 60 %

Therefore, Percentage change in the average=60 %


7 0
3 years ago
Read 2 more answers
Belize is a small country in Central America. The
shepuryov [24]

Answer:

60 inches

Step-by-step explanation:

<em>30% of 200 inches = 200 inches * 30%</em>

<em>30% = 0.3</em>

Substitute: 200 inches * 0.3

Multiply: 60 inches

5 0
4 years ago
Help find the value of x pls
boyakko [2]

Answer:

x=2°

Step-by-step explanation:

The given angles are corresponding angles.

Corresponding angles are congruent.

7x+3=8x+1

2=x

x=2

8 0
3 years ago
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