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
alexandr1967 [171]
2 years ago
7

Un camio pot portar una carrega maxima de 5 t.En un afabrica ha caregat 6 contenidors de 3 q i 85kg cada un.Quants quilos mes hi

pot carregar?
Mathematics
1 answer:
scoray [572]2 years ago
7 0

Answer:

ripppppppppp

Step-by-step explanation:

ripppppppppppp

You might be interested in
Is there statistically significant evidence that the districts with smaller classes have higher average test​ scores? The t​-sta
Musya8 [376]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The  95% confidence interval is [670.03  , 673.97 ]

The  test statistics is t = 7.7

The  p-value  is    p-value  =  0

The <u>p-value</u>  suggests that the null hypothesis is<u> rejected </u>with a high degree of confidence. Hence  <u>there is</u> statistically significant evidence that the districts with smaller classes have higher average test score  

Step-by-step explanation:

From the question we are told that

   The sample size is  n =  408

    The sample mean is  \= y  =  672.0

   The standard deviation is  s = 20.3

Given that the confidence level  is 95% then the level of significance is  

   \alpha = (100 -95 )\% = 0.05

From the normal distribution table  the critical value of \frac{\alpha }{2} = \frac{0.05 }{2} is  

    Z_{\frac{\alpha }{2} } =  1.96

Generally  the margin of error is mathematically represented as  

     E  =  Z_{\frac{\alpha }{2} } *  \frac{s}{\sqrt{n} }

=>   E  =  1.96 *  \frac{20.3}{\sqrt{408} }

=>     E  =  1.970

Generally the 95% confidence interval is mathematically represented as

       \= y -E  < \mu <  \= y + E

=>     672.0 -1.970  < \mu < 672.0 +1.970

=>     670.03  < \mu < 673.97

=>     [670.03  , 673.97 ]

From the question we are told that

   Class size                                  small                                      large

  Avg.score(\= y)         \= y_1 = 683.7   \= y_2 =  676.0

   S_y                          S_{y_1} =20.2    S_{y_2} = 18.6

   sample size                             n_1 = 229        n_2 =  184

The  null hypothesis is  H_o :  \mu_1 - \mu_2 = 0

The alternative hypothesis is  H_a :  \mu_1 - \mu_2 > 0

Generally the standard error for the difference in mean is mathematically represented as

       SE =  \sqrt{\frac{S_{y_1}^2 }{n_1} +\frac{S_{y_2}^2 }{n_2}   }

=>     SE =  \sqrt{20.2^2 }{229} +\frac{18.6^2 }{184_2}   }

=>     SE =  1.913

Generally the test statistics is mathematically represented as

      t = \frac{\= y _1 - \= y_2 }{SE}

=>    t = \frac{683.7 - 676.0 }{1.913}

=>   t = 7.7

Generally the p-value is mathematically represented as

    p-value  =  P(t >  7.7 )

From the  z-table

        P(t >  7.7 ) =  0

So

   p-value  =  0

From the values we obtained and calculated we can see that p-value  <  \alpha

This mean that

The p-value  suggests that the null hypothesis is rejected with a high degree of confidence. Hence  there is statistically significant evidence that the districts with smaller classes have higher average test score  

4 0
3 years ago
Questions 4 and 5 refer to the following:
Damm [24]

Answer:

Step-by-step explanation:

Parallel lines are lines that never meet, from the question in the attachment above, the two lines that cannot meet are lines 'a' and 'b' and lines 'c' and 'd'

4. Question four is then lines b and a which is option B

Perpendicular lines are lines in which the angle between them is right angle (90 degrees). Which are 'a' and 'c', 'a' and 'd', 'b' and 'c', 'b' and 'd'

5. Question 5 is therefore 'a' and 'c' which is option D

7 0
3 years ago
Divide.
Nataliya [291]

Answer:

 2/7

Step-by-step explanation:

The quotient is ...

  \dfrac{-16}{-56}=\dfrac{2\cdot8}{7\cdot8}=\boxed{\dfrac{2}{7}}

A common factor of -8 can be cancelled from numerator and denominator.

3 0
2 years ago
Which expression is equivalent to &gt;<br> 7^8/7 <br><br> 7^9<br> 7^8<br> 7^7<br> 1/7^8
tankabanditka [31]

Answer:

none of the above the 7^8/8 is equivalent to

5 0
2 years ago
Find the volume of a sphere if the surface area of the sphere is 64π cm²? Explain your
yarga [219]

Answer:

the answer is 85.33π cm

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • What's the quotient of <br>61.962÷0.449=
    14·1 answer
  • Solve for x 90°, 45°, and x°
    6·1 answer
  • Item 14<br> Solve 2x−3y=62x−3y=6 for yy.
    12·1 answer
  • What can you conclude about the intersection of a chord and the radius that bisects it
    14·1 answer
  • Watch one piece
    7·1 answer
  • What is the value of y?<br><br><br><br> Enter your answer in the box.
    8·1 answer
  • Help me! The question is in the image
    14·1 answer
  • What are the vertices of angle A’B’C’ if angle ABC is dilated by a scale factor of 2?
    15·1 answer
  • Well, im heartbroken and I guess no one cares anymore so I should die amirite or what live for nothing no one can break me anymo
    13·2 answers
  • I need help<br> Please answer y
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!