1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
egoroff_w [7]
3 years ago
6

PLZ HELP!!!!!!!!!!!!!!

Mathematics
1 answer:
Mashutka [201]3 years ago
7 0
The answer would be B
You might be interested in
Can someone help me with number 4 and 12
Aliun [14]

Answer:

4 .c is the right answer

Step-by-step explanation:

16=100%

20÷16=1.25 or 125%

125%-100%= 25% increase

7 0
3 years ago
Read 2 more answers
Factor the polynomial: 6x^2 + x - 35
umka21 [38]

Answer:

= (2x+5)x(3x-7)

Step-by-step explanation:

3 0
2 years ago
Can you help me with this task please?
Vinil7 [7]

Answer:

83 is prime

97 is prime

92 is composite - The pairs are (1,96) (2,46) (4,23)

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Of 1000 randomly selected cases of lung cancer, 823 resulted in death within 10 years.
Arada [10]

Answer:

a) 0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799

0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847

The 95% confidence interval would be given by (0.799;0.847)

b) n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79  

And rounded up we have that n=622

c) n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11  

And rounded up we have that n=1068

Step-by-step explanation:

Part a

\hat p=\frac{823}{1000}=0.823

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799

0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847

The 95% confidence interval would be given by (0.799;0.847)

Part b

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.03 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79  

And rounded up we have that n=622

Part c

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11  

And rounded up we have that n=1068

5 0
3 years ago
Line one (7,-41) and (-15,113) what is the slope of line one
Firdavs [7]

Slope of the line is -7

Step-by-step explanation:

  • Step 1: Find slope of the line using formula, m = (y2 - y1)/(x2 - x1). Here, x1 = 7, y1 = -41, x2 = -15 and y2 = 113

⇒ m = (113 - -41)/(-15 - 7)

       = 154/-22 = -7

3 0
3 years ago
Other questions:
  • Is -1/17 a repeating decimal
    12·1 answer
  • |-3|-2 ³ + 1/3 ÷ 1/6- 2 × 1/2 - (√4 -6 ÷2)
    7·1 answer
  • Rewrite 32/9 as an mixed number
    9·2 answers
  • A group of 30 bikers went on a trip. Some
    10·1 answer
  • Sarah is researching the connection between the time students spend watching television and their performance in school. Her stu
    14·2 answers
  • 2/3 + 1/2
    14·1 answer
  • y = -16x2 + 32x - 10 This parabola has x-intercepts, representing the times when the dolphin's height above water is feet.
    6·2 answers
  • Six is less than or equal to the sum of a number n and 15
    15·1 answer
  • Use the diagram to help you solve the equation 4x - 12 = 16
    5·1 answer
  • Un dirigible que está volando a 800 m de altura, distingue un pueblo con un ángulo de depresión de 12°. ¿A qué distancia del pue
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!