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
MAVERICK [17]
3 years ago
6

Which uses less electricity in an hour, a blender or a popcorn popper

Mathematics
1 answer:
SIZIF [17.4K]3 years ago
4 0
A blender, depending on how long it's been used.
You might be interested in
Sample Size for Proportion As a manufacturer of golf equipment, the Spalding Corporation wants to estimate the proportion of gol
Dima020 [189]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.025}{2.58})^2}=2662.56  

And rounded up we have that n=2663

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

\hat p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

t_{\alpha/2}=-2.58, t_{1-\alpha/2}=2.58

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.025 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

We can assume an estimated proportion of \hat p =0.5 since we don't have prior info provided. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.025}{2.58})^2}=2662.56  

And rounded up we have that n=2663

6 0
3 years ago
HELP ME PLEASE<br><br> SJSJSJJSJSJSJSJ
djverab [1.8K]

Answer:

24.12-9.8=24.32

Step-by-step explanation:

hope this helps, sorry I'm bad at explaining, but just trust me it is this im 100% positive.

7 0
3 years ago
Read 2 more answers
What is a real life word problem for the equation y=2x
lara [203]

Answer:

You want to buy some golden apples. Each golden apple cost $2. How much much does golden apples pass cost?

y = total cost

x = amount of apple

7 0
3 years ago
What is the length of EF in the right triangle below?<br> 18<br> 12
Vinvika [58]

Answer:

It is 30 because it is the only one that makes sense if you do the math

5 0
3 years ago
What fraction is between 1/8 and 5/12
OLga [1]

Answer:

2/8

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • 10 The diagram shows a garden in the shape of a rectangle.
    10·1 answer
  • What is half of 196 please explain
    11·2 answers
  • 2. In the expression X-Y, if X is a negative
    13·2 answers
  • Curtis decided to go on a road trip to Canada. On the first day of his trip, he drove for 15 hours and traveled 1,005 miles. At
    9·2 answers
  • The state of Georgia has about 170 people per square mile. The area of Georgia is 59,425 square miles. What is the population of
    7·1 answer
  • Answer quick for brainliest
    7·2 answers
  • Am stuck on this question and show your working please.
    8·1 answer
  • LAST ONE !!! Ok here
    7·1 answer
  • How can I solve this question ? <br>wick method should I use ?​
    10·2 answers
  • (cot theta + cosec theta)/(cosec theta (1 + (cot theta/ cosec theta)).
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!