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max2010maxim [7]
2 years ago
10

Population density is a measure of how crowded an area is. The population density of Australia is approximately 7.6 people per s

quare mile. If Bangladesh has 2,949.7 more people per square mile than Australia, what is the population density of Bangladesh?
2942.10 people per square mile
2957.30 people per square mile
3025.70 people per square mile
3709.70 people per square mile
Mathematics
2 answers:
Sophie [7]2 years ago
7 0

Answer:

B) 2957.30 people per square mile

I don't need brainly btw

meriva2 years ago
6 0

Answer:

B

Step-by-step explanation:

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Solve for w.<br>9- w = 224​
Tems11 [23]

Answer:

-215

Step-by-step explanation:

-w = 215

w = -215

hope this helped

8 0
2 years ago
PLEASE help! Math help? :)
stepan [7]
Answer: 39.2

Check out the attached image

============================================================

Explanation:

Draw out the triangle or use the diagram provided by your teacher. It should look something similar to what I've attached. 

Let m = length of side XZ

We are given that
angle Y = 75 degrees
angle Z = 67 degrees
which are the green angles shown in the diagram

Use the fact that the three angles (X,Y,Z) add to 180 degrees to find angle X
X+Y+Z = 180
X+75+67 = 180
X+142 = 180
X+142-142 = 180-142
X = 38

Now use the law of sines to find m
sin(X)/YZ = sin(Y)/XZ
sin(38)/25 = sin(75)/m
m*sin(38) = 25*sin(75)
m = 25*sin(75)/sin(38)
m = 39.22309 <<<--- make sure your calculator is in degree mode
m = 39.2

So XZ is roughly 39.2 feet in length

4 0
3 years ago
13 more than a number​
liberstina [14]

Answer:

x+13

Step-by-step explanation:

x +13

x: the number

7 0
3 years ago
Read 2 more answers
Passes through (5,7) and(3,1)
den301095 [7]
IF IT IS THE EQUATION OF A LINE YOU ARE LOOKING FOR:
y=mx+c
7-1÷5-3=6÷2=3
y=3x+c (here we substitute in one of the points to find out what C is)
1=(3×3)+c
1=9+c
-8=c

so the equation is: y=3x-8
7 0
3 years ago
(1 point) A noted psychic was tested for ESP. The psychic was presented with 180 cards face down and was asked to determine if t
Luba_88 [7]

Answer:

a) z=\frac{0.239 -0.2}{\sqrt{\frac{0.2(1-0.2)}{180}}}=1.308  

b) p_v =P(z>1.308)=0.0954  

Step-by-step explanation:

Data given and notation

n=180 represent the random sample taken

X=43 represent the correct guesses

\hat p=\frac{43}{180}=0.239 estimated proportion correct guesses

p_o=0.2 is the value that we want to test

\alpha represent the significance level

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the ture proportion is higher than 0.2 or no.:  

Null hypothesis:p=0.2  

Alternative hypothesis:p > 0.2  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Part a: Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.239 -0.2}{\sqrt{\frac{0.2(1-0.2)}{180}}}=1.308  

Part b: Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The next step would be calculate the p value for this test.  

Since is a right tailed test the p value would be:  

p_v =P(z>1.308)=0.0954  

5 0
3 years ago
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