balancing equations
Na + F2 —> NaF

Inference is referred to as all the data collected in a particular study.

Etymologically, the word "infer" means to "carry ahead." Inferences are stages in reasoning that connect premises to logical conclusions. The dichotomy between deduction and induction in inference theory, which dates at least to Aristotle in Europe, is a classic one (300s BCE). Deduction is inference that results in logical conclusions from premises that are known to be true or that are presumed to be true, while the logic of correct inference is investigated. A universal conclusion is inferred by induction from specific evidence. Contradistinguishing abduction from induction, Charles Sanders Peirce is credited with identifying a third sort of inference. Researchers in the domains of logic, argumentation studies, and cognitive psychology traditionally study human inference (i.e., how people draw conclusions); artificial intelligence researchers create automated inference systems to mimic human inference.

To learn more about inference ,visit:

https://brainly.com/question/16780102

#SPJ4

Answer:

55%

Step-by-step explanation:

Because when your doing percentages out of 20 it is 5 for each

1/20=5%

2/20=10%

3/20=15%

4/20=20%

5/20=25%

6/20=30%

7/20=35%

8/20=40%

9/20=45%

10/20=50%

And 11 out of 20=55%

Answer:By solving a system of equations, we will see that the function is continuous for all values of x

Step-by-step explanation:

These operations define the algebraic structure of the set of matrices μ² with dimensions m × n.

The set of matrices of order m × n, denoted by μ², has the following operations:

Addition (V): For matrices A = (a_ij) and B = (b_ij) in μ², the sum A + B is defined as (a_ij + b_ij).

Scalar multiplication (λA): For a scalar λ and a matrix A = (a_ij) in μ², the scalar multiplication λA is defined as (λa_ij).

External product (V2): For matrices A = (a_ij) in μ² and E = (e_ij) in κm × n, the external product V2 is defined as A ⊗ E = (a_ij * e_ij).

To know more about matrices,

https://brainly.com/question/32485147

#SPJ11

Answer:

The easiest way to solve this is by elimination.  

3x - y = 6  

6x + y = 21

Since you have a negative and positive y with the same coefficients (1), they cancel, and you add the other terms so it would look like:

9x = 27  

Then solving for x leaves you with x = 3  

Then you take the x value of three and plug it into to either of the equations, so  

3(3) - y = 6

9 - y = 6  

subtracting 9  

-y = -3  

then dividing by -1  

y = 3  

so the solution is x = 3 y = 3 or (3,3)  

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

Add 3x + 6x, and execute the y, then -6 from 21 and you got ur answer of 15!

The number of observations for each case in a t test for dependent samples is two is the correct answer.

In this question,

The dependent t-test also called the paired t-test or paired-samples t-test compares the means of two related groups to determine whether there is a statistically significant difference between these means. Each sample must be randomly selected from a normal population and each member of the first sample must be paired with a member of the second sample.

A dependent samples t-test uses two raw scores from each person to calculate difference scores and test for an average difference score that is equal to zero.

The groups contain either the same set of subjects or different subjects that the analysts have paired meaningfully. In dependent samples, subjects in one group do provide information about subjects in other groups.

Hence we c an conclude that the number of observations for each case in a t test for dependent samples is two is the correct answer.

Learn more about dependent t-test here

https://brainly.com/question/15870238

#SPJ4

Answer:

43,000: 4.3×10^4

0.0072: 7.2×10^-3

0.0000901: 9.01×10^-5

Step-by-step explanation:

scientific notation: a×10^b, where should be 0<a<10

Step 1. Count the zeros

Step 2. Look at the number left, and determine whether or not it fits in the range of [a]. If not, we divide or multiply 10 to get it fit

------------------------

43,000: 4.3×10^4 (since 43 does not fit, we divide by 10 to get it fit)

0.0072: 7.2×10^-3 (since 0.72 does not fit, we multiply 10 to get it fit)

0.0000901: 9.01×10^-5 (since 0.901 does not fit, we multiply 10 to get it fit)

Hope this helps!! :)

Please let me know if you have any question

The unit of measurement used to describe how far a set of values are from the mean is the standard deviation. Therefore, the correct answer is (b) standard deviation.

The variance is another measure of spread, but it is not in the form of the original units of measurement. The median is a measure of central tendency and not a measure of spread. The mode is the most frequently occurring value in a set and is also not a measure of spread.
The unit of measurement used to describe how far a set of values are from the mean is the Standard Deviation (b). It is calculated by taking the square root of the variance and provides a measure of the average distance between each value in the set and the mean. The Median (c), on the other hand, is the middle value in a set when the values are arranged in numerical order.

Learn more about Standard Deviation:

brainly.com/question/23907081

#SPJ11

Answer:

c

Step-by-step explanation:

To prove that tan(u - v) does not equal tan u - tan v, we start by assuming values for u and v.

To do this, we assume the following values

\(\mathbf{u = 75}\)

\(\mathbf{v = 45}\)

So, we have:

\(\mathbf{tan(u - v) \ne tan(u) - tan(v)}\)

Substitute the assumed values for u and v

\(\mathbf{tan(75 - 45) \ne tan(75) - tan(45)}\)

Subtract 45 from 75

\(\mathbf{tan(30) \ne tan(75) - tan(45)}\)

Using a calculator, calculate the values of tan(30), tan(45) and tan(75)

So, we have:

\(\mathbf{0.5774 \ne 3.7321 - 1}\)

Subtract 1 from 3.7321

\(\mathbf{0.5774 \ne 2.7321}\)

Notice that the expression on the left-hand side and the expression on the right-hand side are not equal.

Hence, \(\mathbf{tan(u - v) \ne tan(u) - tan(v)}\) is true

Read more about proofs of trigonometry at:

https://brainly.com/question/22698523

Given :

Let sin(45°)=0.7071.

To Find :

The angle measure (μ), in degrees for cos(μ)=−0.7071 and value equivalent to 360n + , where n is an integer .

Solution :

We know , value of sin x and cos x is same at x = 45° .

Now , cos (-x) = cos(90°+x)

Therefore , μ in given question is :

μ =90°+45°

μ=135°

So , for angle of type 360°n + :

μ = 360°n + 135° .

Hence , this is the required solution .

Answer:

3rd Option

Step-by-step explanation:

Answer: The answer is C (the Third choice)

Step-by-step explanation:

The effective annual rate (EAR) of a bank account that pays daily interest with an APR of 4.5% is 4.67%.

The EAR is calculated using the following formula:

\(\begin{equation}EAR = (1 + \frac{APR}{n})^n - 1\end{equation}\)

Where:

EAR is the effective annual rate

APR is the annual percentage rate

n is the number of compounding periods per year

In this case, the APR is 4.5% and the number of compounding periods per year is 365. Plugging these values into the formula, we get:

\(\begin{equation}EAR = (1 + \frac{0.045}{365})^{365} - 1\end{equation}\)

EAR = 4.67%

Therefore, the EAR is 4.67%. This means that if you deposit $100 in an account that pays daily interest with an APR of 4.5%, you will have $104.67 at the end of the year.

It is important to note that the EAR is always higher than the APR. This is because compounding allows you to earn interest on your interest. For example, if you deposit $100 at an APR of 4.5%, you will earn $4.50 in interest in one year.

However, if your account compounds daily, you will earn interest on the interest that you earn each day. This means that you will earn more than $4.50 in interest in one year.

To know more about the effective annual rate refer here :

https://brainly.com/question/28347040#

#SPJ11

5/6 - 1/9=?/? - ?/? = ?/? , value of each (?/?) is

5/6 -1/9 =15 /18 -2/18 =13 /18.

As given,

5/ 6 - 1/9 =?/? -?/? =?/?

Convert the given terms into like terms

Least common multiple of (6,9)=18

Value of each ( ?/?)

(5/6 ) × ( 3/3) -(1/9) × (2/2)

= 15 /18 - 2/18

= 13 /18

Therefore,5/6 - 1/9 = ?/? - ?/? = ?/? , value of each (?/?) is equal to

5/6 -1/9 = 15 /18 -2/18 = 13/18.

Learn more about value here

brainly.com/question/1578158

#SPJ4

Answer:

47 hours

Step-by-step explanation:

564/12 = 47

Answer:

47 hours

Step-by-step explanation:

564÷12.00= 47

Answer:

Angle A = 120

Angle C = 45

Step-by-step explanation:

First, you need to find the value of x. To do this, we must set up our equation to find x. You know that the sum of angles of a triangle is 180 degrees, and you are given the three angles. So, you can write:

(12x+12) + 15 + (3x+18) = 180

Simplifying and combining, we get

15x + 45 = 180

and then

x = 9

So, now you plug 9 back for x, and (12 * 9 + 12) = 120 degrees (for angle A)

(3 * 9 + 18) = 45 degrees (angle C).

If you want to check, 120 + 45 + 15 = 180, which is correct.

18. An infant weighs 11 pounds which is equivalent to 4.98 kg. Using the 100/50/20 Rule, the required amount of fluid per day for an infant between 11-20 kg is 50 ml/kg/day. So, the required amount of fluid per day in ml is 4.98 kg x 50 ml/kg/day = 249 ml/day.

19. A child weighs 31lbs and 8 ozs which is equivalent to 14.21 kg. Using the 100/50/24 Rule, the required amount of fluid per day for a child over 20 kg is 20 ml/kg/day. So, the required amount of fluid per day in ml is 14.21 kg x 20 ml/kg/day = 284.2 ml/day.

If no oral fluids are consumed, the hourly IV flow rate to maintain proper hydration would be: 284.2 ml/day / 24 hours/day = 11.8 ml/hour.

The question is about fluid requirements for infants and children, and it is using the 100/50/20 Rule for Daily Fluid Requirements (DFR) to calculate the required amount of fluid per day for different weight ranges. The 100/50/20 Rule is a guideline used to determine the appropriate amount of fluid that infants and children should receive on a daily basis based on their weight. The rule states that for infants and children up to 10 kg, the recommended fluid intake is 100 ml/kg/day, for those between 11-20 kg it is 50 ml/kg/day, and for those over 20 kg it is 20 ml/kg/day.

The question also asking about the hourly IV flow rate to maintain proper hydration if no oral fluids are consumed.

This subject is part of pediatrics, more specifically in the field of fluid and electrolyte balance and management.

Learn more about Daily Fluid Requirements (DFR) here:

https://brainly.com/question/28334028

#SPJ4

Answer:

Find out for yourself.

Step-by-step explanation:

4th is 16

6th is 36

Based on the numbers that are the 6th and the 4th square numbers, the difference between those numbers is 20.

The 6th square number is:

= 6 x 6

= 36

The 4th square number is:

= 4 x 4

= 16

The difference is:

= 36 - 16

= 20

In conclusion, the difference is 20.

Find out more at https://brainly.com/question/19249764.

The Recurrence interval for tornadoes in tuscaloosa county is 0.909

What is recurrence interval ?

The time period in which a new occurrence of something that happened or appeared before : a repeated occurrence or The time frame in which a previously occurring event or appearance first occurs: a recurring occurrence

Given that,

Total number of tornadoes is 77

Total time for Recurrence is 70 years

Using these data,

Recurrence = Total time for recurrence / Total number of tornadoes

Substituting we get,

Recurrence interval = 70/77

= (70/77)

= (0.909)

To Learn more about recurrence interval:

brainly.com/question/17253648

#SPJ4

The boat is moving at a velocity of approximately 32.24 km/hr relative to the ground, and the current pushes the boat off its due east course by an angle of approximately 21.02 degrees.

The boat is heading due east at 31 km/hr, so the vector representing the boat's velocity relative to the water is V₁ = 31i, where i is the unit vector in the eastward direction. The current is moving toward the southwest, which can be represented by the vector V₂ = -13/sqrt(2)i - 13/sqrt(2)j, where j is the unit vector in the southward direction. The actual movement of the boat is the vector sum of V₁ and V₂:

V = V₁ + V₂ = 31i - 13/sqrt(2)i - 13/sqrt(2)j = (31 - 13/sqrt(2))i - 13/sqrt(2)j.

The boat's velocity relative to the ground is the magnitude of the vector V, which can be calculated as:

|V| = sqrt((31 - 13/sqrt(2))^2 + (-13/sqrt(2))^2) ≈ 32.24 km/hr.

To find the angle by which the current pushes the boat off its due east course, we can use trigonometry. The angle θ can be calculated as the arctangent of the y-component divided by the x-component of the vector V:

θ = arctan((-13/sqrt(2)) / (31 - 13/sqrt(2))) ≈ 21.02 degrees (approximately).

Know more about velocity here:

https://brainly.com/question/30559316

#SPJ11

let's recall d = rt, or namely distance = rate * time.

b = speed of the boat in still water

c = speed of the current

when going Upstream, the boat is not really going "b" fast, is really going slower, is going "b - c", because the current is subtracting speed from it, likewise, when going Downstream the boat is not going "b" fast, is really going faster, is going "b + c", because the current is adding its speed to it.

\(\begin{array}{lcccl} &\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\ \cline{2-4}&\\ Upstream&82&b-c&2\\ Downstream&106&b+c&2 \end{array}\hspace{5em} \begin{cases} 82=(b-c)2\\\\ 106=(b+c)2 \end{cases} \\\\[-0.35em] ~\dotfill\)

\(\stackrel{\textit{using the 1st equation}}{82=(b-c)2}\implies \cfrac{82}{2}=b-c\implies 41=b-c\implies \boxed{41+c=b} \\\\\\ \stackrel{\textit{substituting on the 2nd equation}}{106[~(41+c)+c~]2}\implies \cfrac{106}{2}=41+2c\implies 53=41+2c \\\\\\ 12=2c\implies \cfrac{12}{2}=c\implies \blacksquare~~ 6=c ~~\blacksquare~\hfill \blacksquare~~ \stackrel{41~~ + ~~6}{47=b} ~~\blacksquare\)

-3 and 4 are the two Factors

The Diamond Rule states that two factors, m and n, must multiply to get to the top number and add to get to the bottom number. The problem states that the diamond has -12 at the top, -1 on the bottom, and M on the left side and N on the right.

To find the values of m and n, you should list all possible pairs of factors that multiply to -12 and add to -1. The possible values for m and n are:

-3 and 4

The product of -3 and 4 is -12, and the sum of -3 and 4 is -1,

which satisfies the Diamond Rule.

Thus, the answer is -3 and 4.

Learn more about Diamond Rule  from :

https://brainly.com/question/27022598

#SPJ11

The equation that represents the f(x), in which the amount by which difference between the terms changes are the same, indicating that f(x) is a quadratic function is the option A

A. f(x) = -2·x² - 8·x + 42

A quadratic function is a function that can be expressed using the vertex form of a quadratic equation as follows;

f(x) = a·(x - h)² + k, where, a ≠ 0, and (h, k) is the coordinates of the vertex of the graph of the quadratic function, which is a parabola.

The first difference of the data in the table are;

50 - 48 = 2

48 - 50 = -2

42 - 48 = -6

32 - 42 = -10

The second difference are;

-2 - 2 = -4

-6 - (-2) = -4

-10 - (-6) = -4

The constant second difference indicates that the function is a quadratic function

The symmetry about the point (-2, 50), indicates that the vertex point on the graph is the point (-2, 50)

The vertex form of the quadratic function is therefore;

f(x) = a·(x - (-2))² + 50 = a·(x + 2)² + 50

The point x = 0, indicates that we get; f(0) = a·(0 - (-2))² + 50 = 42

a·(0 - (-2))² = 42 - 50 = -8

a = -8/(0 - (-2))² = -2

The quadratic function is therefore; f(x) = (-2)·(x + 2)² + 50 = -2·(x² + 4·x + 4) - 50

f(x) = -2·(x² + 4·x + 4) - 50 = -2·x² - 8·x - 8 + 50 = -2·x² - 8·x + 42

f(x) = -2·x² - 8·x + 42

Learn more on quadratic equations here: https://brainly.com/question/24628957

#SPJ1

Answer:

x = 9.4m

Hope this helps...Have a good day!!

There is a 96% customer retention rate for the third quarter.

Given

Jenny owns a salon.

She had 150 customers at the end of the third quarter, 151 customers at the beginning of the third quarter, and five new customers in the third quarter.

It determines the percentage of customers that the company has retained over a given period.

The customer retention rate is determined by;

\(\rm Customer\ retention\ rate=\dfrac{Given \ period - New \ customers}{Initial \ number}\times 100\)

Substitute all the values in the formula;

\(\rm Customer\ retention\ rate=\dfrac{Given \ period - New \ customers}{Initial \ number}\times 100\\\\\rm Customer\ retention\ rate=\dfrac{150-5}{151}\times 100\\\\\rm Customer\ retention\ rate=\dfrac{145}{151}\times 100\\\\\rm Customer\ retention\ rate=0.96 times 100\\\\\rm Customer\ retention\ rate=96 \ percent\)

Hence, there is a 96% customer retention rate for the third quarter.

To know more about customer retention rate click the link given below.

https://brainly.com/question/25668470

If scores on an exam follow an approximately normal distribution with a mean of 76.4 and a standard deviation of 6.1 points, then the minimum score you would need to be in the top 2% is equal to 88.929.

This type of problem can be referred to as a normal distribution problem.

It can be solved by using the z-score.

Formula;

Z = x - μ / σ

Here,

Z represents the standard score

x represents the observed value

μ represents the mean

σ represents the standard deviation

The z- score can be found by using the p-value on a standard table.

As the minimum score to be in the top 2% is needed to be found, p-value = 0.02

z- score that corresponds to the p-value of 0.02 in the standard table is equal to 2.054

Hence,

2.054 = x - 76.4 / 6.1

2.054(6.1) = x - 76.4

12.529 = x - 76.4

x = 12.529 + 76.4

x = 88.929

Hence the minimum score needed to be in the top 2% is calculated to be 88.929

To learn more about normal distribution, click here:

https://brainly.com/question/4079902

#SPJ4

Answer:

this is easy it is 23 miles per every 35 housrs

Step-by-step explanation:

Answer:

Slope = 20

y-intercept = 60

Step-by-step explanation:

Answer: Slope formula is given as

Pick two points on the line and use their coordinates. Let's pick (1, 80) and (2, 100).

Let, Plug the values above into the formula for slope: The slope of the graph is 20.

The y-intercept is the point where the line intercepts the y-axis.

y-intercept = 60.