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
Evgesh-ka [11]
3 years ago
7

Pls answer these McQ to be the brainliest

Mathematics
1 answer:
nexus9112 [7]3 years ago
5 0

Step-by-step explanation:

1. c

2. a

3. c

4. c

5. d

6. b

7. a

8. b

9. c

You might be interested in
Cuantos años hay 5823 días
jonny [76]

Answer:

16 anos

Step-by-step explanation:

6 0
3 years ago
A gift box has the shape of a cube with an edge length of 4.5 in.
Rzqust [24]
4.5 x 4.5 = 20.25 x 4.5 = 91.125 in
5 0
3 years ago
Read 2 more answers
I have 3 Algebra questions can anyone help?
Kisachek [45]

1.  9x^2+4x-8

2. 6x^3+16x^2+3x+8

3. 5x^4-27x^3-14x^2+24x

4 0
3 years ago
Which theory is supported by scientists gathering the additional evidence of seafloor spreading and magnetism?
Levart [38]

Answer:

Mid-Atlantic Ridge Theory

Step-by-step explanation:

hope this helps. :)

5 0
2 years ago
Read 2 more answers
In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the fol
uysha [10]

Answer:

(9-8) -2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 0.0743

(9-8) +2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 1.926

And we are 9% confidence that the true mean for the difference of the population means is given by:

0.0743 \leq \mu_1 -\mu_2 \leq 1.926

Step-by-step explanation:

For this problem we have the following data given:

\bar X_1 = 9 represent the sample mean for one of the departments

\bar X_2 = 8 represent the sample mean for the other department

n_1 = 25 represent the sample size for the first group

n_2 = 20 represent the sample size for the second group

s_1 = 2 represent the deviation for the first group

s_2 =1 represent the deviation for the second group

Confidence interval

The confidence interval for the difference in the true means is given by:

(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1}+\frac{s^2_2}{n_2}}

The confidence given is 95% or 9.5, then the significance level is \alpha=0.05 and \alpha/2 =0.025. The degrees of freedom are given by:

df=n_1 +n_2 -2= 20+25-2= 43

And the critical value for this case is t_{\alpha/2}=2.02

And replacing we got:

(9-8) -2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 0.0743

(9-8) +2.02 \sqrt{\frac{2^2}{25} +\frac{1^2}{20}}= 1.926

And we are 9% confidence that the true mean for the difference of the population means is given by:

0.0743 \leq \mu_1 -\mu_2 \leq 1.926

4 0
3 years ago
Other questions:
  • How many servings in 3/4 of a cookie when each serving is 1/2 cookie
    11·1 answer
  • Help me on this question! Jake can carry 6 1/4 pounds of wood in from the barn.His father can carry 1 5/7 times as much as jake.
    7·1 answer
  • Can anybody help me out
    15·1 answer
  • Wholesaler is 120.00 what is 25%markup
    13·1 answer
  • Find the average velocity of the function over the given interval 2+tan x[-pi/4
    10·1 answer
  • Please help! serious answers only
    14·2 answers
  • Harry’s basic rate is $22.00 per hour. If overtime is paid at time-and-a-half, how much will
    6·1 answer
  • If the polygon is translated 4 units down and 5 units right, what will the coordinates of the new image be? Use prime notation i
    8·1 answer
  • Which of these is a correct step in constructing an angle bisector? (6
    15·1 answer
  • Lindbergh's Air Speed Charles Lindbergh estimated that at the start of his historic flight the practical economical air speed wa
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!