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Helga [31]
3 years ago
15

Helpppppppppppppppppppppppppppppp

Mathematics
1 answer:
Maurinko [17]3 years ago
8 0
The best way to do this is to set up a proportion

420          x
------  = ------
600        100

then cross multiply and divide

420 times 100 = 42000/600=70

the correct answer is C. 70 people

I hope I've helped!
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You want to test your newly created Web site, so you have 250 people access it from random locations at random times. Of the peo
Arte-miy333 [17]

Answer: 505

Step-by-step explanation:

The formula to find the sample size n , if the prior estimate of the population proportion (p) is known:

n= p(1-p)(\dfrac{z}{E})^2 , where E=  margin of error and z = Critical z-value.

Let p be the population proportion of crashes.

Prior sample size = 250

No. of people experience computer crashes = 75

Prior proportion  of crashes p=\dfrac{75}{250}=0.3

E= 0.04

From z-table , the z-value corresponding to 95% confidence interval = z=1.96

Required sample size will be :

n=0.3(1-0.3)(\dfrac{1.96}{0.04})^2 (Substitute all the values in the above formula)

n= (0.21)(49)^2= 0.21\times2401

n= 504.21\approx505   (Rounded to the next integer.)

∴ Required sample size = 505

6 0
3 years ago
Solve this equation:<br> X – 8<br> 6<br> = 4.5<br> Your answer
barxatty [35]

Answer:

Multiply by 6 on both sides

X-8 = 27

add 8 to both sides

X = 35

Hope this helps

Double-checking

35 - 8 = 27

27 / 6 = 4.5

35 = X is the answer

Hope this helps

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is the midpoint M of that line segment?
pychu [463]

Answer:

Midpoint = (  (x1+x2)/2 , (y1+y2)/2 )

Step-by-step explanation:

Please upload the line segment otherwise, you can use the equation above to solve for it.

8 0
3 years ago
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Multiple choice please please answer
lakkis [162]

Answer:

\purple { \boxed{x = 25 \times  \sin \: 39 \degree}}

Step-by-step explanation:

\sin \: 39 \degree =  \frac{x}{25}  \\ 25 \times  \sin \: 39 \degree = x \\  \huge \red{ \boxed{x = 25 \times  \sin \: 39 \degree}}

4 0
3 years ago
I need help asap!! please!!
andre [41]
Wouldnt it be a dot on the line right in between 75 and 76 pointing towards the left? im not sure 
4 0
3 years ago
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