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shtirl [24]
3 years ago
10

The surface area of the world is about 7/10 water. If a very small, non-dangerous meteoroid lands on the earth, what is the prob

ability it does NOT land in the water?
Mathematics
2 answers:
galben [10]3 years ago
7 0

Answer: 3/10 probability

Step-by-step explanation:

We are telling the probability with tenths, so we can say that the probability of the meteoroid landing on Earth is 3/10.

If the surface area of the world is approximately 7/10, or 70 percent, water, there is approximately 3/10, or 30 percent, chance of the meteoroid hitting land.

I'm pretty sure, at least ^_^

gladu [14]3 years ago
4 0
3/10I answered this on my test
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A pizza shop delivers an extra large pizza, which is sold for $20, and costs the pizza shop $12 to make. The pizza
Sonbull [250]

Answer:

Is it bad that I'm a senior and have no idea how to do this?

Step-by-step explanation:

7 0
3 years ago
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Solve for b.<br> 106 + 18 = 28
Oxana [17]

Answer:

106+18≠28

106+18=124

in case the b was misplaced with the 6

10b=28-18

10b=10

10b/10=10/10

b=1

hope this is helpful

7 0
2 years ago
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How do you solve 1/3x = 20 to find x
Alex
1/3x=20

1st step do the opposite of 1/3x to get it by itself. So you would do 1/3x *3/1 than you would do 3/1 *20. What you do to that side you do to the other.

2nd step 20*3=60

3rd You can check your answer by doing 1/3 *60=20

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7 0
2 years ago
A survey claims that a college graduate from Smith College can expect an average starting salary of $ 42,000. Fifteen Smith Coll
jek_recluse [69]
<h2>Answer with explanation:</h2>

Let \mu be the average starting salary ( in dollars).

As per given , we have

H_0: \mu=42000\\\\ H_a:\mu

Since H_a is left-tailed , so our test is a left-tailed test.

WE assume that the starting salary follows normal distribution .

Since population standard deviation is unknown and sample size is small so we use t-test.

Test statistic : t=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}} , where n= sample size , \overline{x} = sample mean , s = sample standard deviation.

Here , n= 15 , \overline{x}=  40,800  , s= 225

Then, t=\dfrac{40800-42000}{\dfrac{2250}{\sqrt{15}}}\approx-2.07

Degree of freedom = n-1=14

The critical t-value for significance level α  = 0.01 and degree of freedom 14 is 2.62.

Decision : Since the absolute calculated t-value (2.07) is less than the  critical t-value., so we cannot reject the null hypothesis.

Conclusion : We do not have sufficient evidence at 1 % level of significance to support the claim that  the average starting salary of the graduates is significantly less that $42,000.

3 0
2 years ago
You want to fill the cylinder shown below with water. All you have is a container shaped like a cone with a radius of 3 inches a
wlad13 [49]

Answer:

n = 9.14 ≈ 10 cones ( if integer is required )

Step-by-step explanation:

Given:

- The dimensions of the cylinder "missing from this question" are:

                          Radius r_1 = 8 in , Height h_1= 3 in

- The dimensions of faucet are :

                          Radius r_2 = 3 in , Height h_2 = 7 in

Find:

- How many cone shaped like containers are required to fill the cylinder.

Solution:

- We will denote the letter 'n' as the number of cone shaped containers.

- For n amount of cone shaped containers is to fill the container the volume of water of n container should equal the volume of water in cylinder. This can be expressed as follows:

                                       n*V_cone = V_cylinder

- Where,

               V_cone = ( 1 / 3 ) * pi * r^2 _2 * h_2

               V_cylinder = pi*r^2_1*h_1

- Hence,

                                      n = V_cylinder/ V_cone

Plug in values:

                                      n = (3*r^2_1 *h_1 )/ r^2_2 *h_2

                                      n = ( 3 * 8^2 * 3 ) / ( 3^2 * 7)

                                      n = 576 / 63 = 9.14 cones

Answer:                         n = 10 cones

3 0
2 years ago
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