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
Anvisha [2.4K]
2 years ago
8

Hello need help with this thanks!

Mathematics
1 answer:
lina2011 [118]2 years ago
8 0
The answer is 28
work shown in picture below
You might be interested in
Marine scientists categorize signature whistles of bottlenose dolphins by typelong dash—type ​a, type​ b, type​ c, etc. In one s
r-ruslan [8.4K]

Answer:

The 95​% confidence interval for the true proportion of bottlenose dolphin signature whistles that are type a whistles is (0.4687, 0.6123).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 185, \pi = \frac{100}{185} = 0.5405

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5405 - 1.96\sqrt{\frac{0.5405*0.4595}{185}} = 0.4687

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5405 + 1.96\sqrt{\frac{0.5405*0.4595}{185}} = 0.6123

The 95​% confidence interval for the true proportion of bottlenose dolphin signature whistles that are type a whistles is (0.4687, 0.6123).

3 0
3 years ago
Factoring Quadratic Expressions:<br> 5p^2 - p - 18
Dennis_Churaev [7]
5 p^{2} -p-18

5 p^{2}-10p+9p-18

5p(p-2)+9(p-2)

(p-2)(5p+9)
3 0
3 years ago
I need help. Please
zubka84 [21]

Answer:

Answer is A.

Step-by-step explanation:

If you take the current cords of 'C' and add the cords it gives you: (4.5,-6.5). You end out with (3.5,-9,2). Hope this helps!

5 0
3 years ago
Read 2 more answers
7p²-30p + 8 how do you factor this trinomial
tamaranim1 [39]

Step-by-step explanation:

7p²-30p+8

=(p-4)(7p-2)

8 0
3 years ago
Determine whether these statements are true or false. a) ∅ ∈ {∅} b) ∅ ∈ {∅,{∅}} c) {∅} ∈ {∅} d) {∅} ∈ {{∅}} e) {∅} ⊂ {∅,{∅}} f )
Pavel [41]

Answer:

a) ∅ ∈ {∅} TRUE

b) ∅ ∈ {∅,{∅}}  TRUE

c) {∅} ∈ {∅}  FALSE

d) {∅} ∈ {{∅}} TRUE

e) {∅} ⊂ {∅,{∅}} TRUE

f ) {{∅}} ⊂ {∅,{∅}} TRUE

g) {{∅}} ⊂ {{∅},{∅}}FALSE

Step-by-step explanation:

To assess whether these statements are true or false, first observe the symbol:

"∈" means that element, as it is and as it is, belongs to the set. To belong to the set it must be within the symbols "{}"

On the other hand, the symbol "⊂" means "subset", that is, it is a subset that is included in the main set.

So:

c) is false because "{∅}" is not included in the set

g) is false because " {{∅}}" is not included in the set

7 0
3 years ago
Other questions:
  • Solve the equation for the problem above
    15·1 answer
  • If B=D=37, find C so that quadrilateral ABCD is a parallelogram.
    15·1 answer
  • Annabel is comparing the distances that two electric cars can travelafter the battery is fully charged
    8·1 answer
  • A figure made up of a triangle and rectangles is shown.
    12·1 answer
  • What is 500 times 76
    10·2 answers
  • Could anyone prove this question correct... pls... I will mark branliest for step by step solution.
    15·1 answer
  • Can someone please help i would really appreciate it
    6·1 answer
  • You have a pie with 6 pieces and you eat 2. what fraction is that?​
    12·2 answers
  • D(5,7), E4, 3), and 18, 2) form the vertices of a triangle. What is m_DEF?
    8·1 answer
  • Can you plsss help me due now
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!