The most likely scientific explanation for improvement after wearing this jewelry was D. Some people may feel improvement after a week because their body is healing naturally, without help from the ions.
How to explain the improvement ?The placebo effect is the best scientific explanation for why so many people experience better after donning a particular piece of jewelry.
The placebo effect happens when users of a product claim to be experiencing physical or mental changes as a result of using it, despite the fact that the product itself lacks the ingredients necessary to produce these effects. The jewelry is acting as a placebo in this scenario.
After a week, some people may experience improvement as their bodies begin to recover on their own, without the aid of the ions.
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how to calculate seismic response coefficient
Answer:
The seismic coefficient represents the maximum horizontal equivalent acceleration expected in a failure wedge in slip potential and is obtained by averaging the horizontal forces in the deformable sliding mass, according to the equation: kmax=¯ah.
It is calculated by dividing the maximum acceleration response of a building by the peak ground acceleration of the underlying seismic hazard.
To calculate the seismic response coefficient, the following steps should be followed:
1. Identify the seismic hazard in the area. This can be done by consulting geological surveys and geological maps.
2. Calculate the peak ground acceleration of the seismic hazard. This can be done using the various seismic hazard assessment techniques such as the probabilistic seismic hazard analysis (PSHA) method.
3. Determine the maximum acceleration response of the building. This can be done by performing a dynamic analysis of the building using a computer simulation program or a hand calculation.
4. Divide the maximum acceleration response of the building by the peak ground acceleration of the seismic hazard to obtain the seismic response coefficient.
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The sum of the squares of two consecutive even integers is 1684. Find the integers.
The possible values of two consecutive even integers, of which the sum of their squares is 1684, are 28 and 30 for positive integers, while for negative integers, they are -28 and -30.
The difference between two consecutive even integers is 2.
Let the integers be a and (a+2). Then,
a² + (a + 2)² = 1684
a² + a² + 4a + 4 = 1684
2a² + 4a - 1680 = 0
a² + 2a -840 = 0
Hence, we get a quadratic equation.
There are three methods of solving a quadratic equations: by factoring, completing the square, and by using the abc formula.
Use the factoring method:
a² + 2a -840 = (a - 28) (a + 30)
a = 28 and a = -30
Hence, if the integers are positive, they are: 28 and 30.
If the integers are negative, they are -28 and -30.
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Pollter are concerned about declining level of cooperation among peron contacted in urvey. A pollter contact 91 people in the 18-21 age bracket and find that 77 of them repond and 14 refue to repond. When 277 people in the 22-29 age bracket are contacted, 245 repond and 32 refue to repond. Aume that 1 of the 368 people i randomly elected. Find the probability of getting omeone in the 18-21 age bracket or omeone who repond. Report the anwer a a percent rounded to one decimal place accuracy. You need not enter the "%" ymbol. P(18-21 or repond)
The probability of getting omeone is 25.3%
Find the probability of getting omeone in the 18-21 age bracket or omeone who repond?
Define the two events
A = someone is in the 18-21 age bracket
B = the person does not respond
Based on the table, we have
n(A) = number of people in set A = 76
n(B) = 31
n(A and B) = 11
So,
n(A or B) = n(A) + n(B) - n(A and B)
n(A or B) = 76+31-11
n(A or B) = 96
We have 96 people in the age 18-21 bracket, they didn't respond, or both.
Divide this over the 379 people surveyed
96/379 = 0.253 = 25.3%
Answer: 25.3%
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#3 1 Gender evious You randomly survey 40 students about whether they play an instrument. You find that 8 males play an instrument and 13 females do not play an instrument. A total of 17 students in the survey play an instrument. Make a two-way table that includes the marginal frequencies.
People who dislike cantaloupe are marginally more likely to be (0.455) likely to be.
How do you define marginal relative frequency?The joint relative frequencies in a row or column of a data table are added in this case.
Therefore, we will create a representation of the table using the findings from the survey of 200 randomly selected individuals as follows:
Watermelon The total is not a watermelon
Cantaloupes: 93, 16, and 109
Not a cantaloupe 66 25 91
Total 159 41 200
The marginal relative frequency for those who dislike cantaloupe is therefore 0.455.
The complete complete question is,
How common are those who dislike cantaloupe, on a relative basis? startfraction 91 over 200 endfraction startfraction 25 over 91 endfraction startfraction 66 over 200 endfraction startfraction 91 over 200 endfraction.
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PLSSS HELP IF YOU TURLY KNOW THISSS
Answer:
The answer is x = 2. To solve for x, divide both sides of the equation by 8 to get x = 16/8 = 2.
Step-by-step explanation:
Answer:
[tex]8x = 16 \\ x = 16 - 8 \\ x = 8[/tex]
determine whether the variable is qualitative or quantitative. explain your reasoning.
The variable "Gallons of water in a swimming pool" is a quantitative variable.
Quantitative variables are variables that are numerical and can be measured on a scale, such as height, weight, or time. In this case, the number of gallons of water in a swimming pool can be measured and can take any value within a range, such as 0 to 100,000 gallons. Therefore, "Gallons of water in a swimming pool" is a quantitative variable.
In contrast, qualitative variables are variables that describe an attribute or characteristic of a person, place, or thing, and they do not have a numerical value. Examples of qualitative variables include hair color, religious affiliation, or nationality.
"
Complete question
Determine whether the variable is qualitative or quantitative. explain your reasoning.
Variable: Gallons of water in a swimming pool
"
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Does the following represent a linear or exponential function?
y = 5+2x
Answer:
The function y = 5 + 2x represents a linear function.
Katie has $500 in a savings account that earns 12% annually. How much interest will she earn in 4 years?
Answer:
below
Step-by-step explanation:
Interest = prt p = principle = 500 r = rate in decimal = .12 t = years
= 500 ( .12)(4) = 240 dollars
23.97xsquare root of 0.7124 divided by 3.877x52.18
The value of the expression 23.97 x √(0.7124) ÷ 3.877 x 52.18 is 0.1000069342.
What is an expression?One mathematical expression makes up a term. It might be a single variable (a letter), a single number (positive or negative), or a number of variables multiplied but never added or subtracted. Variables in certain words have a number in front of them. A coefficient is the number used before a phrase.
Given:
A phrase: 23.97xsquare root of 0.7124 divided by 3.877x52.18.
In numeric form,
23.97 x √(0.7124) ÷ 3.877 x 52.18.
= 0.1000069342.
Therefore, the value is 0.1000069342.
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Determining Truth Values
If p →q is true, which compound statement has the same truth value?
Ap →q is false and q→ p is true.
Bp →q is false and q→ p is false.
Cp →q is true and q→ p is false.
Dp →q is true and q→ p is true.
Therefore , the solution of the given problem of compound statements comes out to be choice D is right.
What is compound statement ?Like in any language, connectives are used to combine simpler statements to create complex statements in mathematics. And, or, if... then, and if and only if are the connectives that are frequently employed in mathematics. The truth value of the a compound statement is determined by variable the truth values of its simpler parts.
Here,
Given :function
To discover the true values
Which compound statement,
if p →q is true, will have the same truth value?
The formulation of the logic biconditional link
p ↔ q, which is "p → q and q → p," provides the direct connection to the solution.
As a result, choice D is right.
Therefore , the solution of the given problem of compound statements comes out to be choice D is right.
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find the limit (if it exists). (if an answer does not exist, enter dne.) lim s→6 f(s), where f(s) = 3s − 4, s ≤ 6 7 − 1 2 s, s > 6
The limit of f(s) as s approaches 6 does not exist because the function has two different values for s approaching 6 from the left and from the right.
A limit is a concept in mathematics that deals with finding the value that a function approaches as the independent variable approaches a certain value.
We need to consider two different cases, as the function f(s) has different definitions for s less than or equal to 6 and s greater than 6.
For s less than or equal to 6, the function f(s) is defined as
=> 3s - 4.
As s approaches 6, the value of f(s) will approach
=> 3 * 6 - 4 = 14.
For s greater than 6, the function f(s) is defined as
=> 7 - 1/2 * s.
As s approaches 6, the value of f(s) will approach
=> 7 - 1/2 * 6 = 4.
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What is 1 + 1
A. 1
B. 2
C. 10,000,000
D. 5
Answer:
E. - 11
Step-by-step explanation:
This is by the simple quantum physics moving by the gravitational carbon dioxide in the air that causes the numbers to evolve into the number 11 while mixed together
Nick can run at a speed of 25 feet per second. Which 2-variable equation models how many feet he can run?
A) x • m = 25
B) x2 + m2 =25
C) 25 ÷m = x
D) 25x = m
The correct 2-variable equation that models how many feet Nick can run is: 25x = m,
Hence, option (d) is correct choice.
As per the data given,
We have,
Nick can run at a speed of 25 feet per second.
We need to convert the above statement in 2-variable equation models
We can write it as:
Distance covered by Nick will be:
25x = m
where x is the time in seconds that Nick runs and
m is the distance in feet that Nick runs.
The equation represents the relationship between time and distance using the constant speed of 25 feet per second.
The distance travelled is equal to the speed multiplied by the time.
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Line segment xy is dilated to create line segment x'y' using point t as the center of dilation. Point t is the center of dilation. Line segment x y is dilated to create shorter line segment x prime y prime. The length of t x prime is 6 and the length of t y prime is 9. The length of x x prime is 2. What is yt?.
Given that point T is the center of dilation, we know that the length of line segments TX' and TY' are proportional to the length of line segments TX and TY, respectively.
We can express this as:
TX' = k * TX
TY' = k * TY
where k is the scale factor.
We are given the lengths of TX' and TY':
TX' = 6
TY' = 9
So, we can solve for k:
9 / k = 6
k = 9 / 6 = 3 / 2
Now that we know the value of k, we can find TY:
TY = TY' / k = 9 / (3 / 2) = 6 * (3 / 2) = 9
Next, we are given the length of XX':
XX' = 2
And using the dilation formula, we can find XX:
XX = XX' / k = 2 / (3 / 2) = 2 * (2 / 3)
Finally, we can find TX by using the Pythagorean theorem:
TX^2 = TY^2 + XX^2
TX^2 = 9^2 + (2 * (2 / 3))^2
TX^2 = 81 + (4 / 3)^2
TX^2 = 81 + 16 / 9
TX^2 = 81 + 16 / 9
TX = √(81 + 16 / 9) = √(81 + 16 * 9 / 9) = √(81 + 16) = √97
So, TY = 9 and TX = √97. Therefore, YT = TY - TY' = 9 - 9 = 0.
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TX' = k * TX
TY' = k * TY
TX' = 6
TY' = 9
So, we can solve for k:
9 / k = 6
k = 9 / 6 = 3 / 2
Now that we know the value of k, we can find TY:
TY = TY' / k = 9 / (3 / 2) = 6 * (3 / 2) = 9
XX' = 2
XX = XX' / k = 2 / (3 / 2) = 2 * (2 / 3)
TX^2 = TY^2 + XX^2
TX^2 = 9^2 + (2 * (2 / 3))^2
TX^2 = 81 + (4 / 3)^2
TX^2 = 81 + 16 / 9
TX^2 = 81 + 16 / 9
TX = √(81 + 16 / 9) = √(81 + 16 * 9 / 9) = √(81 + 16) = √97
So, TY = 9 and TX = √97. Therefore, YT = TY - TY' = 9 - 9 = 0.
HELP ASAP, WILL MARK BRAINLIEST
Data was collected on the amount of time that a random sample of 8 students spent studying for a test and the grades they earned on the test. A scatter plot and line of fit were created for the data.
scatter plot titled students' data, with points plotted at 1 comma 75, 2 comma 70, 2 comma 80, 2 comma 90, 3 comma 80, 3 comma 100, 4 comma 95, and 4 comma 100, and a line of fit drawn passing through the points 0 comma 60 and 2 comma 80
Find the y-intercept of the line of fit and explain its meaning in the context of the data.
5; for each additional hour a student studies, their grade is predicted to increase by 5% on the test
10; for each additional hour a student studies, their grade is predicted to increase by 10% on the test
60; a student who studies for 0 hours is predicted to earn 60% on the test
80; a student who studies for 0 hours is predicted to earn 80% on the test
Answer:
y = 10x + 60
Step-by-step explanation:
Hope this will help on your test.
The diagram shows a regular polygon. Work out the value of x.
Answer:
x = 67.5 degrees
Step-by-step explanation:
this is an octagon which has 8 sides
the sum of all interior angles can be found by taking the number of sides, reducing it by 2, and then multiplying by 180
(8-2)*180 = 6(180) = 1080
the 1080° must be split equally among all 8 angles because it is a 'regular' polygon
1080/8 = 135
however, 'x' represents half of each regular angle so it is 67.5 degrees
PLEASE. I NEED HELP 4 3/8 x 2 4/7
Answer:
Mixed Number: 11 1/4
Decimal: 11.25
Step-by-step explanation:
Answer:
[tex] \red {\boxed{\tt{ 11\frac{14}{56} }}}[/tex]
Step-by-step explanation:
[tex] \tt4 \frac{3}{8} \times 2 \frac{4}{7} \\ \\ \tt \frac{8 \times 4 + 2}{8} \times \frac{7 \times 2 + 4}{7} \\ \\ \tt \frac{35}{8} \times \frac{18}{7} \\ \\ \tt{ \frac{35 \times 18}{8 \times 7} } \\ \\ \tt {\frac{630}{56}} \\ \\ \tt{ 11\frac{14}{56} }[/tex]
A teacher asks three students to complete the following statement about the nature of the roots
of a quadratic equation.
If q
2
– 4pr > 0, the roots of the quadratic equation px2 + qx + r = 0 will be...
Zain answers, "always positive".
Vipul answers, "positive, if p, q, and r are positive".
Suman answers, "negative, if p, q, and r are positive".
Who answered correctly
Answer:
Vipul answered correctly.
The nature of the roots of a quadratic equation depends on the value of the discriminant, which is given by b^2 - 4ac, where a, b, and c are coefficients in the equation ax^2 + bx + c = 0. If the discriminant is positive, the roots of the equation will be real and distinct, and their sign will depend on the sign of the coefficients a, b, and c. If p, q, and r are positive, the value of the discriminant (q^2 - 4pr) will be positive, and the roots of the equation px^2 + qx + r = 0 will be real and distinct, but their sign cannot be determined just based on the values of p, q, and r alone.
PLEASE HELP! What is -1/5 x 10/11 ?!
Answer choices: (image)
Answer:
Step-by-step explanation:
-2/11
Answer:
-1/5 × 10/11 = -2/11
Step-by-step explanation:
If you multiply -1/5 by 10/11, it becomes the fraction -2/11 or 0.1818...
Write as a power (-7) (-7) (-7)
Please explain with steps
Answer:
7^3
Step-by-step explanation:
since seven is being multiplied by itself 3 times, it is being cubed. So it needs to be raised to the third power.
hope this helps!!! :3
Answer: (-7)(-7)(-7) is equal to -7^3 (just imagine that the three is on the top right outer corner of the 7)
Step-by-step explanation:
A power is when you multiply a number by itself a certain number of times, in this case, we are multiplying the number 7 by itself 3 times. Every time it is multiplied by its self, the power of that number goes up (if you are using a power of one for any number, it will stay the same). Here is an example:
-7 to the first power is just -7.
-7 to the second power, or squared is just (-7)(-7) or (-7) x (-7).
-7 to the third power, or cubed, is just (-7)(-7)(-7) or (-7) x (-7) x (-7).
Hope this helps!!!
find the slope (1,3), (5,5).
Find the slope (0,-1), (2,3)
Find the slope (2,-3),(5,-4)
Answer:
Find the slope (1,3), (5,5): m = 0.5
Find the slope (0,-1), (2,3): m = 2
Find the slope (2,-3), (5,-4): m = -1/3
Step-by-step explanation:
m = y2-y1/x2-x1
Answer: 2, 1, -1/3
Step-by-step explanation:
y2-y1/x2-x1
5-3 = 2
5-4=1
2
15. An author has written 5 children's books. The number of pages in these books are 64, 65, 73, 74, and 76.
a. List all 10 possible SRSS of size n=3, calculate the median number of pages for each sample, and display the sampling distribution of the sample median on a dotplot.
b. Show that the sample median is a biased estimator of the population median for this population.
c. Describe how the variability of the sampling distribution of the sample median would change if the sample size was decreased to n=2.
The mean of this sampling distribution is 70.9, which is less than the value of the population median of 73, therefore, the sample median is a biased estimator of the population median.
What is median?The median is the value separating the higher half from the lower half of a data sample, a population, or a probability distribution. For a data set, it may be thought of as "the middle" value.
A statistic used to estimate a parameter is an unbiased estimator if the mean of its sampling distribution is equal to the value of the parameter being estimated.
We obtained the following data from part (a) of this problem,
Sample 1: 64, 65, 73, and median is 65.
Sample 2: 64, 65, 74, and median is 65.
Sample 3: 64, 65, 76, and median is 65.
Sample 4: 64, 73, 74, and median is 73.
Sample 5: 64, 73, 76, and median is 73.
Sample 6: 64, 74, 76, and median is 74.
Sample 7: 65, 73, 74, and median is 73.
Sample 8: 65, 73, 76, and median is 73.
Sample 9: 65, 74, 76, and median is 74.
Sample 10: 73, 74, 76, and median is 74.
Let us calculate the mean of this sampling distribution,
μ(median) = ( 65+65+65+73+73+73+73+74+74+74)/10
μ(median) = 709/10
μ(median) = 70.9
The mean of the sampling distribution is found to be equal to 70.9.
(b) 70.9, which is less than the value of the population median of
73, therefore, the sample median is a biased estimator of the population median.
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Can someone please help in number 12? Need to show work
Answer:
15 percent
Step-by-step explanation:
There are total 40 students in class because 6 plus 12 plus 14 plus 20 is 40. Fraction would be 6/40
An air hug applies a force of 4600 N to bring about a change in moment of 2760 kg m/s. How much time did it act over?
The period for which the force acts on the body is 0.6 seconds.
What is momentum?Momentum is the result of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on the particle equals the time rate of change of momentum.
Given the force applied is 4600 N
F = 4600 N
and change in momentum = Δm = 2760 kg m/s
force is given by a change in momentum to the change in time
F = Δm/Δt
Δt = Δm/F
Δt = 2760/4600
Δt = 0.6 seconds
Hence the change in time is 0.6 seconds.
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I need help with the bottom 2
“write the slope-intercept for. (Y=mx+b) of the equation of each line.”
The equation of the each of the lines in slope-intercept form are:
5. y = -1/3x + 3.
6. y = 2x - 2
7. y = -8/3x + 4.
8. y = -2x + 1.
What is the Slope-intercept Form of a Line?The slope-intercept form of a line is y = mx + b, where m is the slope of the line and b is the y-intercept.
5. Slope (m) = rise/run = -1/3
y-intercept (b) = 3
The equation is: y = -1/3x + 3.
6. Slope (m) = rise/run = 2/1 = 2
y-intercept (b) = -2
The equation is: y = 2x - 2
7. Slope (m) = rise/run = -8/3
y-intercept (b) = 4
The equation is: y = -8/3x + 4.
8. Slope (m) = rise/run = -2/1 = -2
y-intercept (b) = 1
The equation is: y = -2x + 1.
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8x + 11y = –16 Write your answer using integers, proper fractions, and improper fractions in simplest form.
Answer:
Slope-intercept form is
y = mx + b
We want to get the y by itself on one side of the equation.
0 = 18x + 6y – 2
First let's subtract 6y from both sides.
-6y = 18x – 2
Next let's divide both sides by -6.
y = (18 / -6)x - (2 / -6)
y = -3x + 1/3
Step-by-step explanation:
Isadore Belle earned 15% commission on her monthly sales of $2,870,
$3,150, and $3,940. What was her total commission for all three months.
FOOTEHEND
Nema takt
ME
wa CD
ma
CUNHIDETIOL
wostimees
PREHMBARE
GESTUDENTARE
K
STANICAL
MILIDMATIRAN
Answer:
1494
Step-by-step explanation:
15%($2,870+$3,150+$3,940) =1494
Exponential Functions
The growth factor in the function is 5.
What is growth factor?An exponential function with the form A(t) = [tex]C a^t[/tex], where a > 0
When t = 0, the function's initial value is represented by the number C, and the growth (or decay) factor is represented by the number a.
If a > 1, the function represents growth; If 0 < a < 1, the function represents decay.
Given:
y = 4 x [tex]5^7\\[/tex]
we know the general form of Exponential function
g(x) = [tex]ab^x[/tex]
where a is the initial amount
b is the growth or decay factor
and, x is the time
Now, comparing to the given function
Initial amount= 4
Growth factor = 5
time = 7
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Can you please answer the question in the attachement!
Ty love
Answer:
I don't know. I hope this helps!
Step-by-step explanation:
Answer:
Tuna sandwich to likely
chicken sandwich to unlikely
Egg sandwich to impossible
Step-by-step explanation:
there is a lot more tuna than chicken sandwiches so it's likely
there is no egg sandwiches so it's impossible
find a pattern. use the terms from part 1 to answer each question. what is a proof?
terms from part 1:
Definition
Postulate(axiom)
Common notion
Theorem
Corollary
the term for the given Table is given below:
A. - 3.B. - 1.C. - 5.D. - 4.E. - 2.What is a theorem?Mathematics is all about theorems. A rigorous proof is a specific form of logical argument that has been used to demonstrate the truth of a claim, which is what a theorem is.
A. Definition refers to a statement that exactly defines the object, thing, or everything.
B. Postulate or axiom is a statement that is accepted as true in order to initiate an argument.
C. Common notion is the statement that helps to understand the common sense of the subject.
D. Theorem is a statement that shows proof on the basis of previously made statements.
E. Corollary is a statement that acts as a small proof that has already been proven.
Therefore, the correct matching for the given terms will be:
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Complete question:
Explain the main parts and uses of two kinds of proofs. March the word with the right definition.
A. Definition
B. Postulate(axiom)
C. Common notion
D. Theorem
E. Corollary
1. A statement that is assumed to be true without proof
2. A statement that has already been proven to be true
3. A statement that tells exactly what something is or means
4. A statement that makes sense based on another statement that has already been proven
5. A statement that is not officially defined but that is understood to be common sense.
Help pls :3