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TiliK225 [7]
2 years ago
11

Use the description of Mongolia’s rare-earth mineral deposits to determine if it is a bulk-gaining or bulk-reducing industry. Su

pport your answer with information from the article. How will the fact that it is a bulk-gaining or bulk-reducing impact any mining company in terms of the placement of refining plants
Advanced Placement (AP)
1 answer:
Aliun [14]2 years ago
4 0

It is a bulk reducing industry because pure minerals have to be extracted from their ores.

<h3>What is Bulk reducing Industry?</h3>

This type of industry make products which weigh less after assembly than before assembly.

In Mongolia, the products weigh more as  result of the impurities present in them but weigh less when they are refined which is why this type of industry have plants which are located close to where the materials are found.

Read more about Bulk reducing industry here brainly.com/question/9229824

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Electric vehicles make up a very small proportion of the overall car market, but by how much has that proportion increased? Inde
Minchanka [31]

Given Information:

The proportion of electric cars sold in 2012 = p₁ = 0.1%

The proportion of electric cars sold in 2016 = p₂ = 0.5%

Sample size of electric cars in 2012 = n₁ = 10,000

Sample size of electric cars in 2016 = n₂ = 20,000

Confidence level = 95%

Required Information:

Change in the proportion of electric cars sold from 2012 to 2016 = ?

Answer:

Change in the proportion of electric cars sold from 2012 to 2016 = (0.284%, 0.516%)

Step-by-step explanation:

The change in the mean is given by

\mu = p_2 - p_1\\\\\mu = 0.005 -0.001\\\\\mu = 0.004\\\\

The change in standard error is given by

SE = z\cdot\sqrt{\frac{p_1(1 - p_1)}{n_1} + \frac{p_2(1 - p_2)}{n_2} }

Where z is the value of z-score corresponding to 95% confidence level.

z_{\alpha/2} = 1 - 0.95 = 0.05/2 = 0.025\\\\z_{0.025} = 1.96\\\\

SE = 1.96\cdot\sqrt{\frac{0.001(1 - 0.001)}{10,000} + \frac{0.005(1 - 0.005)}{20,000} } \\\\SE = 1.96\cdot 0.00059\\\\SE = 0.00116\\\\

The change in the proportion of electric cars is

\mu \pm SE \\\\0.004\pm 0.00116 \\\\(0.004-0.00116) \: and \: (0.004-0.00116)\\\\(0.00284, \: 0.00516)\\\\(0.284\%, \: 0.516\%)

Therefore, we are 95% confident that the change in the proportion of electric cars sold from 2012 to 2016 is between (0.284%, 0.516%)

5 0
3 years ago
I'm going into the IB Program for high school next year, and I was just wondering what are some pros and cons of the program. A
Vladimir [108]
Hey I'm a freshman in IB in celebration high school in central Florida. If you're considering the IB program it's probably because you're bright and school has always come easy to you. The hardest part of IB is for the smartest kids who have always had it easy (myself included), because now it's not so easy. It means studying (I had never studied before), it means not allowing yourself to get distracted at all or you will work till 1-2 am daily. It also means less free time ( this was hardest on me). It is ready once you changed your mindset to "school first, play second" (something I've never had). But in the end you're so prepared to heavy workloads and for college. Colleges know this when they see an IB diploma so they like these kids a lot and accept them often (if you're grades are at the very minimum C or B average. (Ivy league won't accept less than A's across the board usually). In the end you likely get to a good college and do well in college that is the plus.
3 0
3 years ago
A biker goes from 15 ms -1to 0 ms -1after hitting a brick wall. Its rate of acceleration is -50ms -2 . Calculate the time taken
Damm [24]

Answer:

Time taken t = 4.167 seconds (Approx)

Explanation:

Given:

Initial Speed u = 12 m/s

Final speed v = 0 m/s

Acceleration a = -50 m/s²

Find:

Time taken t

Computation:

v = u + at

0 = 12 + (-50)t

t = 4.167 s

Time taken t = 4.167 seconds (Approx)

4 0
3 years ago
Helicopter blades withstand tremendous stresses. In addition to supporting the weight of a helicopter, they are spun at rapid ra
Radda [10]
NOTE: Check your formula sheet if you have one these are often there.

Ac = \frac{V^{2} }{r} = rω^2

We know r = 4.00m

but what is ω?

ω = \frac{2π}{T} = 2π*f

f is our frequency. we want it in seconds so we can divide by 60.

300/60 = 5rev/s

Ac = rω^2 = (4)(5)^2 = 100m/s

(b) Linear speed or v is equal to v = ω = (5)(4) = 20m/s
      340 / 20 = 17

      The speed of sound is 17 times faster.

NOTE: finished physics so i might be rusty and use an equation wrong. Tell me if something doesnt make sense. Im still new to this myself.


7 0
3 years ago
Read 2 more answers
Despite how open or closed a door is, we perceive the door as a rectangle. Which type of constancy does this demonstrate?
Sphinxa [80]
Shape is correct. This is because we're talking about the door being rectangular, it is (B).
5 0
3 years ago
Read 2 more answers
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