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
ale4655 [162]
3 years ago
13

I’m confused on #2 can some one please help

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
3 0

Answer: The answer is A

You might be interested in
Out of 100 people sampled, 42 had kids. Based on this, construct a 99% confidence interval for the true population proportion of
maksim [4K]

Answer:

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

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 z-score that has a p-value of 1 - \frac{\alpha}{2}.

Out of 100 people sampled, 42 had kids.

This means that n = 100, \pi = \frac{42}{100} = 0.42

99% confidence level

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

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 - 2.575\sqrt{\frac{0.42*0.58}{100}} = 0.293

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 + 2.575\sqrt{\frac{0.42*0.58}{100}} = 0.547

The 99% confidence interval for the true population proportion of people with kids is (0.293, 0.547).

7 0
2 years ago
I ran 13 miles in 2 1/4 hours. What was my average speed? (It has to be done using proportions) I don't need the answer, I need
alina1380 [7]
2 1/4 hours=2.25 hours

ran 13 miles in 2.25 hours, so I just need to take 13 miles divided for 2.25 which equal 5 7/9. As a result, my average speed is 5 7/9 miles per hour. Hope it help!
6 0
3 years ago
Help please asap algebra 2
timurjin [86]
X = approximately 633

Steps:
lnx + ln3x = 14

ln3x^2 = 14 : Use the log property of addition which is to multiply same log                           together so you multiply x and 3x because they have log in                                common

  (ln3x^2) =  (14)  : take base of e on both sides to get rid of the log
e                e

3x^2 = e^14  : e cancels out log on the left side and the right side is e^14 

x^2 = e^14 / 3 : divide both sides by 3

√x^2 = <span>√(e^14 / 3) : take square root on both sides to get rid of the square 2                                  on x
</span>
x = √(e^14) / <span>√3 : square root cancels out square 2 leaving x by itself

x = e^7 / </span>√3 : simplify the √(e^14) so 14 (e^14) divide by 2 (square root) = 7<span>

x = </span>633.141449221 : solve 
4 0
2 years ago
What term refers to common, non-rechargeable batteries?
kiruha [24]

Answer:

Lithium

Explanation:

Lithium batteries features primary cell construction.They are single-use or non rechargeable batteries

6 0
1 year ago
What is the radius of a sphere which area is equal to the sum of the areas of four circles of radius 7?
antiseptic1488 [7]

Answer:

radius = 7 units

Step-by-step explanation:

Given:

Radius = 7 units

Find area of 4 circles:

1 circle = π (7)² = 49π units²

4 circles = 49π x 4 = 196π units²

Find radius of sphere:

4πr²  = 196π

r² = 49

r = 7

3 0
3 years ago
Other questions:
  • Peter played his favorite video game for 10 hours last week. Today Peter's parents restricted him to 5 hours a week for the next
    15·1 answer
  • To avoid detection at customs, a traveler places 6 narcotic tablets in a bottle containing 9 vitamin tablets that are similar in
    7·1 answer
  • The diagonals of a rectangle are_______and they______each other
    6·1 answer
  • Help I need the answer phone plz​
    14·1 answer
  • 150.00 - 60.72- 10.00
    10·1 answer
  • The ages of Raju and Ravi are in the ratio 3:4 .Four years from now the ratio of their ages will be 4:5 . Find their present age
    15·2 answers
  • What is the slope of the line?
    15·1 answer
  • What is the solution to the following system of equations: 2x + 4y = 8 -2x - 4y = 8 the options are (4, 0),(0, 2) No Solution In
    7·1 answer
  • Mandy was making 6 pillows to give as gifts to her family. She needed 5/8 of a yard of material for each pillow. How many yards
    11·1 answer
  • Hey guys im back with some new math content help plz
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!