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
konstantin123 [22]
3 years ago
15

Help me please, it's easy kinda

Mathematics
2 answers:
trasher [3.6K]3 years ago
7 0
Karl ate 5/6 of a small bag of popcorn .
nikklg [1K]3 years ago
5 0
He ate 5/6 of a bag of popcorn
You might be interested in
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained i
Scorpion4ik [409]

Answer:

a) We need a sample size of at least 3109.

b) We need a sample size of at least 4145.

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}.

The margin of error is:

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

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

(a) he uses a previous estimate of 25​%?

we need a sample of size at least n.

n is found when M = 0.02, \pi = 0.25. So

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

0.02 = 2.575\sqrt{\frac{0.25*0.75}{n}}

0.02\sqrt{n} = 2.575\sqrt{0.25*0.75}

\sqrt{n} = \frac{2.575\sqrt{0.25*0.75}}{0.02}

(\sqrt{n})^{2} = (\frac{2.575\sqrt{0.25*0.75}}{0.02})^{2}

n = 3108.1

We need a sample size of at least 3109.

(b) he does not use any prior​ estimates?

When we do not use any prior estimate, we use \pi = 0.5

So

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

0.02 = 2.575\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 2.575\sqrt{0.5*0.5}

\sqrt{n} = \frac{2.575\sqrt{0.5*0.5}}{0.02}

(\sqrt{n})^{2} = (\frac{2.575\sqrt{0.5*0.5}}{0.02})^{2}

n = 4144.1

Rounding up

We need a sample size of at least 4145.

8 0
3 years ago
Having Problems With This Question
hjlf

Answer:

f+g(2)=10

f-g(4)=-4

F/G(2)= 7/3

(f)(g)(1)=0

Step-by-step explanation:

1. (f+g)=2x+3+x^2-1 2(2)+2=10

2. (f-g)=(2x+3)-(x^2-1)=-x^2+2x+4= -16+8+4=-4

3. f/g= 2x+3/x^2-1 4+3/3= 7/3

4. f*g= (2x+3)(x^2-1)= 2x^3+3x^2-2x-3= 2(1)^3-2(1)+3(1)^2-3=0

8 0
3 years ago
Which of the following is a requirement for a trinomial to be factored as a perfect square? A. The coefficient for the x^2 term
prisoha [69]
For the trinomial to be a perfect square trinomial the coefficient for the x^2 term must. E a perfect square.
Letter C
4 0
3 years ago
Help please!! will give brainiest :))
jeyben [28]

Answer:

81(x + 2y)(x - 2y)

Step-by-step explanation:

81 {x}^{2}  - 324 {y}^{2}  \\  \\  =  {(9x)}^{2}  -  {(18y)}^{2}  \\  \\  = (9x + 18y)(9x - 18y) \\  \\  = 9(x + 2y) \times 9(x - 2y) \\  \\  = 81(x + 2y)(x - 2y)

7 0
3 years ago
Read 2 more answers
What’s the answer and the work ?
Phoenix [80]

Answer:

2√14

Step-by-step explanation:

√56

√2^2 x 14

√2^2 √14

2√14

5 0
3 years ago
Other questions:
  • Students who attend Washington Middle School are either in seventh or eighth grade. At the end of the first semester 25% of the
    10·1 answer
  • URGENT!!!!
    8·1 answer
  • Graph the function by the table. Is the function linear or nonlinear?
    15·2 answers
  • The price of a share of stock in XYZ Corporation was $74 two weeks ago. Seven weeks ago, the price
    10·1 answer
  • PLEASE ANSWER<br><br> Draw a LINE OF BEST FIT on the scatter plot below.<br><br> (Draw Picture)
    12·1 answer
  • Somebody please help me please
    14·2 answers
  • En una radio, 1/8 del dia esta destinado a emitir publicidad. Del total de publucidad, 3/5 corresponden a comerciales de univerc
    6·1 answer
  • A box plot is shown. The left-most point on the plot is 20 and the right-most point is 95. The box is labeled 35 on the left edg
    8·2 answers
  • What is the solution to the inequality -8x + 4 &lt; -4?
    6·1 answer
  • Given g(x) = (2x - 1), what is the value<br> of g(8)?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!