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mixer [17]
3 years ago
11

$9 is what percent of $20

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
3 0
$9.00 is 45% of $20.00! Hope this helps love! <3
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How Many Miles in 80km?
Fiesta28 [93]
There are exactly 49.7097 miles in 80km. If you were to round that, it would be about 50 miles.
3 0
4 years ago
The 2010 General Social Survey reported a sample where about 48% of US residents thought marijuana should be made legal. If we w
Sati [7]

Answer:

The sample size is  n  = 600

Step-by-step explanation:

From the question we are told that

    The  sample proportion is  \r  p = 0.48

     The  margin of error is  MOE  =  0.04

Given that the confidence level is 95%  the level of significance is mathematically represented as

        \alpha  =  100 - 95

        \alpha  =  5 \%

        \alpha  =  0.05

Next  we obtain the critical value of  \frac{\alpha }{2} from the normal distribution table , the values is

                   Z_{\frac{\alpha }{2}  } =  1.96

The reason we are obtaining critical value of    \frac{\alpha }{2} instead of    \alpha is because  

\alpha represents the area under the normal curve where the confidence level interval (  1-\alpha) did not cover which include both the left and right tail while  

\frac{\alpha }{2} is just the area of one tail which what we required to calculate the margin of error

Generally the margin of error is mathematically represented as

      MOE  =  Z_{\frac{\alpha }{2} } *  \sqrt{ \frac{\r p(1-  \r p )}{n} }

substituting values

          0.04= 1.96*  \sqrt{ \frac{0.48(1-  0.48 )}{n} }

         0.02041 = \sqrt{ \frac{0.48(52 )}{n} }

         0.02041 = \sqrt{ \frac{ 0.2496}{n} }

          0.02041^2  = \frac{ 0.2496}{n}

           0.0004166 = \frac{ 0.2496}{n}

=>       n  = 600

   

5 0
4 years ago
Lancé le 26 novembre 2011, le Rover Curiosity de la Nasa est chargé d'analyser la planète Mars. il a atterri sur la planète roug
grigory [225]

Answer: La durée de la vol entire est 560 millions de miles. La durée par hour est 2.19 millions de miles par hour.

Step-by-step explanation: Je ne sais pas sûr que Je comprends la question exactement. Si on doit trouver la durée par hour, il faut divider 560000000 par 255.

8 0
3 years ago
Point R on the coordinate grid below shows the location of a car in a parking lot. A second car needs to park 6 units above R to
Over [174]

Answer:

R' = (-4 , 4)

Step-by-step explanation:

Given

See attachment for the grid coordinate

From the attachment, we have that:

R = (-4,-2)

Required

Determine the coordinates of the second truck

Represent the position with R'

From the question, we understand the position of R' is 6 above R

When a point (a,b) is moved n point above, the new point becomes (a, b + n)

So:

R = (-4,-2)

When moved 6 points above becomes:

R' = (-4 , -2 + 6)

R' = (-4 , 4)

<em>Hence, (-4,4) answers the question</em>

7 0
3 years ago
What is true about the diagram? Select two options <br> A. m B. m C. m D. m E. m
marissa [1.9K]

I’m sorry, but I believe that you have forgotten to attach the image. It would be impossible to solve without it. Please feel free to message me if you need help with this problem once the image it attached. Sorry for the inconvenience.
4 0
3 years ago
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