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
Art [367]
3 years ago
15

Whats 1+1? I forgotttyt

Mathematics
2 answers:
vfiekz [6]3 years ago
8 0

Answer:

2?

Step-by-step explanation:

Andreyy893 years ago
8 0

Answer:

It's 2.

Step-by-step explanation:

You might be interested in
Given that f(x)=x^2-3x+3 and g(x)=x-1/4 slove for f(g(x)) when x=5
Y_Kistochka [10]
When x=5, f(g(x)) would be (x-1/4)^2 - 3(x-1/4) + 3 which when you plug 5 in for x, you get 11.3125 as an answer
6 0
3 years ago
A certain medicine is given in an amount proportional to a patient's body weight. Suppose a patient weighing 132 pounds requires
diamong [38]
132 pounds -> 143 milligrams

1 pound -> 143/132

156 pounds -> 143/132 * 156 = 169 milligrams
6 0
3 years ago
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia
Arturiano [62]

Answer:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (3)

n=(\frac{2.58(54.5)}{5})^2 =790.846 \approx 791

So the answer for this case would be n=791 rounded up to the nearest integer

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".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.005,0,1)".And we see that z_{\alpha/2}=2.58

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (2)

And on this case we have that ME =+5 and we are interested in order to find the value of n, if we solve n from equation (2) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (3)

n=(\frac{2.58(54.5)}{5})^2 =790.846 \approx 791

So the answer for this case would be n=791 rounded up to the nearest integer

4 0
3 years ago
Each meal at a dinner is $10 . 5 friends ate . Then there was 9% tax . What is the final total ?
harina [27]

Answer:

54.50

Step-by-step explanation:

10 * 5 + 9%

50 + 9% (4.50) = 54.50

7 0
3 years ago
Read 2 more answers
The quality control manager of a soda manufacturing company wishes to use a significant level of 0.05 to test whether the variab
Alex17521 [72]

Answer: 1.645

Step-by-step explanation:

Given : The quality control manager of a soda manufacturing company wishes to use a significant level of 0.05 to test whether the variabilities in the amount of soda in the company's 16 OZ bottles is more than the variabilities in the company's 12 OZ bottles.

Let \sigma_1^2 represents the variance for 16 OZ bottles and \sigma_2^2 represents the variance for 12 OZ bottles.

The Null and Alternative Hypothesis will be  :-

H_0:\sigma_1^2\geq\sigma_2^2

H_1:\sigma_1^2, since alternative hypothesis is left-tailed , then the test is left-tailed test.

By using the standard normal distribution table for z, the critical value for this hypothesis:-

z_{\alpha}=z_{0.05}=1.645

6 0
3 years ago
Read 2 more answers
Other questions:
  • Please answer I'm begging!!!
    8·1 answer
  • 1) Consider the relationship between the height of a plant and time. Time would be considered which of the following?
    13·1 answer
  • Please answer this question only if you know the answer!!! :)
    9·1 answer
  • ASAP simplify 2(3^5)/ 3 ^-2​
    14·1 answer
  • Given that angle ABC is equal to 10 X +40 and angle DBC is equal to 3X +10 what is the measure of angle ABD
    10·2 answers
  • A rectangle is drawn so that the width is 3 feet shorter than the length. The area of the rectangle is 10 square feet. Find the
    8·2 answers
  • What is the value of w?
    11·2 answers
  • What is the simple interest at the end of two year for a loan of rupees 20000 at 10% intrest annum
    5·1 answer
  • If a series of rigid transformations maps ∠E onto ∠B where ∠E is congruent to ∠B, then which of the following statements is true
    13·1 answer
  • If a person who is 5 feet tall throws a ball into the air, the path can be modeled using the table of values, where x represents
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!