which of the following statements about exponential smoothing forecasting model is true? group of answer choices the exponential smoothing model requires access to historical data for at least a five-year period the exponential smoothing model is most useful when short-term forecasts are needed and it relies on more recent data than very early ones the exponential smoothing model is most useful when precise forecasts are required the exponential smoothing model should be used only by hospitality businesses that experience seasonal sales patterns and no other sales trends

The amount of money in the account after 14 years is $20248.59

From the question, we have the following parameters that can be used in our computation:

Also from the question, we have

V = Pe^{rt}

Where

Substitute the known values in the above equation, so, we have the following representation

V = 8620 * e^(6.1% * 14)

Evaluate the products

So, we have the following representation

V = 8620 * e^(0.854)

Evaluate the exponent

So, we have the following representation

V = 8620 * 2.34902418149

Lastly, evaluate the products

So, we have the following representation

V = 20248.5884444

Approximate

V = 20248.59

This means that the value after 14 years is $20248.59

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Reject the null hypothesis because [tex]$p$[/tex]-value [tex]$=0.0045$[/tex] is less than the Significance level x=0.025.

The null hypothesis is a widely used statistical theory that states that for any given single observable variable, there is no statistical relationship or significance between any two sets of observed data and measured events.

According to the given information

[tex]& H_0: \mu=57 \\[/tex]

[tex]& H_a ; \mu > 57 \\[/tex]

[tex]& \alpha=0.025 \\[/tex]

[tex]& \text { Test Statistic }=2.61[/tex]

So,

This is right tailed test

[tex]& \text { Using } z \text { table } \\[/tex]

[tex]& p(z > 2.61) \\[/tex]

[tex]&= 1-p(z < 2.61) \\[/tex]

[tex]&= 1-0.9955 \\[/tex]

[tex]& p \text {-value }= 0.0045[/tex]

Reject the null hypothesis because [tex]$p$[/tex]-value [tex]$=0.0045$[/tex] is less than the Significance level x=0.025.

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Answer:

It has a radius of 4.9meters so its diameter will be multiplied by two making it 9.8meters

Answer: Diameter of each semicircle is 9.8 m, because there is said that these are semicircles, so 4,9 m means radius.

Step-by-step explanation: Semicircle is half of the circle so that means it's divided in half and pass through center point. Radius is the distance from central point to any point of the circumference, and the diameter is equal 2 times Radius.

Answer: 74

Step-by-step explanation:

Answer:

74

Step-by-step explanation:

Got it right on the test.

The value of angle x in the triangle is 130 degrees

From the question, we have the following parameters that can be used in our computation:

Lines = parallel lines

Shapes = Triangles

By the alternate interior angle, the third angle in the bottom triangle has the  same measure as 60 degrees

This means that

x = 70 + 60 -- by the alternate exterior angle throrem

Evaluate the sum

x = 130

Hence, the value of x is 130

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Consequently, the function's average rate of change is -11.

A mathematical expression, rule, or law that describes the relationship between two independent variables and one dependent variable In mathematics, functions exist everywhere, and they are crucial for creating physical links in the sciences.

The function is given by .

The ratio of the dependent variable's change to the independent variable's change is referred to as the rate of change.

f(x)=[tex]x^{2}[/tex]-6x+6

x ranges from -7 to 2, with 2 being the highest value.

=> f(-7) = 49 + 42 + 6 = 97.

=> f(2) =- 12 + 6+4 = -2.

The average rate of change is

f(-7)-f(2)/-7-2

=> 97-(-2)/-9

=> 99/-9

=> -11

Consequently, the function's average rate of change is -11.

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Answer:

- 2

Step-by-step explanation:

the factors of a difference of square are

a² - b² = (a + b)(a - b)

(1 + [tex]\sqrt{3}[/tex] )(1 - [tex]\sqrt{3}[/tex] ) ← are the factors of a difference of squares , then

(1 + [tex]\sqrt{3}[/tex] )(1 - [tex]\sqrt{3}[/tex] )

= 1² - ([tex]\sqrt{3}[/tex] )²

= 1 - 3

= - 2

Answer: 0.6

Step-by-step explanation:

9/15 = 0.6

$9 / 15 cookies = $0.6 cents per cookie

Answer:

Below

Step-by-step explanation:

The area is just the two side lengths multiplied together

area = (4x+13)(5x-2) = 20x^2 +57x -26   units^2

Answer: $79.79

Step-by-step explanation:

First, take 899 divided by 100% = 8.99

Then take 8.99 times 8.875 = $79.79

Answer:

Below

Step-by-step explanation:

8.875 % is .08875 in decimal form:

899 * .08875 = 79.79 dollars

Answer:

x = 65 degrees

Step-by-step explanation:

Let's say z=the angle adjacent (next to) to the 145 degrees angle.

80 + x + z = 180  ==> 180 is the total number of degrees in a triangle

z + 145 = 180  ==>   In addition, if you add up Angle z and 145

                               degrees, you get a straight line which totals to 180

                               degrees

z + 145 - 145 = 180 - 145  ==> solve for z

z = 35 degrees

80 + x + z = 180

80 + x + 35 = 180  ==> plug in 35 for z

80 + 35 + x = 180

115 + x = 180  ==> solve for x

115 - 115 + x = 180 - 115 ==> simplify

x = 65 degrees

The smallest degree of rotation that will map a regular 16-agon onto itself is 22.5 degrees.

What is a degree?

A degree is a unit of measurement used to express angles. It is defined as 1/360th of a full rotation, or 1/2π radians.

To see this, note that a regular 16-agon has 16 sides, and each angle between sides measures 180(16-2)/16 = 135 degrees. Therefore, to rotate the 16-agon so that it maps onto itself, we must rotate it an integer multiple of 135 degrees.

However, we want the smallest such angle, so we must find the smallest integer multiple of 135 degrees that is greater than or equal to 360 degrees (since a full rotation maps the figure onto itself). The smallest such multiple is 2, which is equal to 270 degrees.

The smallest degree of rotation that will map the 16-agon onto itself is 270 degrees / 2 = 135 degrees / 2 = 22.5 degrees.

Hence, The smallest degree of rotation that will map a regular 16-agon onto itself is 22.5 degrees.

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Answer:

Questions and answers

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Question

The perimeter of a shape is 25.71 cm calculate the value of the radius X takes pie to be 3.142

Answer · 15 votes

Answer:5 cmStep-by-step explanation:Given a semicircle with perimeter 25.71 cm, we are required to find the radius of the circle.Circumference of a Semicircle=Length of the Circular part+Length of the diameter[tex]=\pi r+2r[/tex][tex]If \: \pi=3.142, C=25.71\Then:\25.71=3.142r+2r (3.142+2)=25.71\5.142r=25.71 =25.71 \div5.142 =5cm[/tex]

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The perimeter of the semicircle is 25.71 cm. Calculate the value

The solution for the expression 2^(x) − 2^(−x) = 5 is x = log2(10)

Substitute 2^(−x) for 5 and solve for x, which is log2(10).

The given expression ,

2^(x) − 2^(−x) = 5

2^(x) = 5 + 2^(−x)

2^(2x) = (5 + 2^(−x))^2

2^(2x) = 25 + 10*2^(−x) + 2^(−2x)

25 + 10*2^(−x) + 2^(−2x) = 2^(2x)

25 − 2^(2x) = 10*2^(−x) − 2^(−2x)

25 − 2^(2x) = 10*2^(−x) − 2^(−2x) + 2^(2x)

25 = 10*2^(−x) + 2^(2x) − 2^(−2x)

25 = 10*2^(−x) + 2^(−2x) (2^(2x) - 2^(−2x))

25/(2^(−2x) (2^(2x) − 2^(−2x))) = 10*2^(−x)

25/(2^(2x) − 2^(−2x)) = 10*2^(−x)

2^(x) = 10

x = log2(10)

Substitute 2^(−x) for 5 and solve for x, which is log2(10).

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Answer:

(1, -1)

Step-by-step explanation:

we isolate y in the first equation

2x+y=1

-2x.  -2x

y=1-2x

and now we fill y into second equation

4x-2(1-2x)=6

4x-2+4x=6

8x-2=6

   +2 +2

8x=8

/8 /8

x=1

and now to find y we insert x

2(1)+y=1

2+y=1

-2.   -2

y= -1

hopes this helps

Noah is using the 50/30/20 budgeting money management strategy

What is money management?

Money management in mathematics is the application of mathematical principles and techniques to the management of personal or corporate money. It entails the use of mathematical tools like equations, graphs, and statistics to analyse financial data and make educated decisions about budgeting, saving, investing, and spending. Mathematicians also use probability and risk analysis to manage money by estimating the likelihood of different financial events and making decisions based on the benefits and dangers of various financial options. Overall, mathematicians' understanding of money management enables people and organisations to better manage their financial resources and reach their financial objectives.

Noah is using the 50/30/20 budgeting money management strategy because he is using 50% of his income for his basic needs, 30% for entertainment, and 20% for savings and debt repayment.

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The percent increase of the trees is 50%

From the question, we have the following parameters that can be used in our computation:

Initial = 2 feet

Final = 3 feet

The percent increase can then be calculated using

Percentage increase = (Final length - Initial length)/Initial length * 100%

Substitute the known values in the above equation, so, we have the following representation

Percentage increase = (3 - 2)/2 * 100%

Evaluate

Percentage increase = 50%

Hence, the percentage increase is 50%

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The number of hours when Damon and Nicholas will be tied is 2 hours.

The number of hours for the volunteer is 6 hours.

An equation is the statement that illustrates the variables given. In this case, two or more components are taken into consideration to describe the scenario.

From the information, Damon, who has already completed 2 hours, plans to volunteer for 2 hours per week going forward. Nicholas hasn't started yet, but plans to dedicate 3 hours per week to his volunteer project from now on.

Let the number of hours be h.

Damon's equation will be 2 + 2h

Nicholas equation will be 3h

The number of hours to be tied will be:

2 + 2h = 3h

3h - 2h = 2

h = 2

The number of hours is 2.

The number of hours for the volunteer will be:

= 3h

= 3(2)

= 6 hours.

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The value of (1 + i)^8 is 16. De Moivre's describes how the power of a complex number can be calculated using the properties of its modulus and argument.

De Moivre's theorem states that for any complex number z = r * (cos(θ) + i * sin(θ)) and any integer n, we have:

zⁿ = rⁿ * (cos(n * θ) + i * sin(n * θ))

To use this theorem, we need to first express the complex number (1 + i) in terms of its magnitude and angle. We can do this by using the Pythagorean theorem to find the magnitude of the complex number, which is the square root of the sum of the squares of the real and imaginary parts.

In this case, the magnitude is the square root of 1^2 + 1^2, or √2.

The angle of the complex number can be found using the inverse tangent function. In this case, the angle is 45 degrees, since the tangent of 45 degrees is 1. Now that we have the magnitude and angle of the complex number, we can use De Moivre's theorem to find the value of (1 + i)^8. Substituting the values we found into the formula above, we get:

(1 + i)^8 = √2^8 * (cos(8 * 45) + i * sin(8 * 45))

        = 2^4 * (cos(360) + i * sin(360))

        = 16 * (1 + i * 0)

        = 16

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D) none of these choices are correct

The correct answer is boosting.

Given that,

The four tree-based techniques are boosting, bagging, random forests, and decision trees. Which method uses bootstrapped samples, or the process of repeatedly obtaining random samples from training data and replacing them?

Boosting is an emsemble machine learning approach, where we use bootstrapping sampling technique to get the required samples. It helps in the reduction of variance and thus bring in less bias in the sampling approach. Therefore boosting is the correct answer here.

In order to gather the necessary samples for boosting, we employ the bootstrapping sampling technique. It aids in lowering variance, which reduces bias in the sampling strategy. Thus, boosting is the appropriate response in this case.

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The width of the photograph is 10 inches if the length of the photograph is 3 inches.

Any arbitrary reference standard for measuring length that has gained acceptance is referred to as a unit of length. The metric system, which is adopted by every nation on earth, is the most prevalent system in use today. The US customary units are also used in the US. The United Kingdom and a few other nations continue to utilize British Imperial units for specific purposes. SI units and non-SI units are subsets of the metric system.

Given,

The expression is:

x(x + 3) = 70

x² + 3x = 70

Now, we have to subtract 70 on both the sides, we get:

x² + 3x - 70 = 0

(x-7)(x + 10) = 0

x-7=0

x=7

x+10=0

x= -10

Since distance cannot be negative, the correct answer is x = 7. We are now plugging in the length (x + 3).

=x + 3

=7 + 3

=10

Therefore, the width of the photograph is 10 inches.

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The number of the students in the sixth grade will be 132 students.

A ratio is a group of sequentially ordered numbers a and b expressed as a/b, where b is never equal to zero. When two objects are equal, a statement is said to be proportional.

The proportion of sixth and seventh graders is 11 to 9. In the event that there were 108 seventh graders.

The ratio of the number of students in the sixth and seventh will remain constant.

Let 'x' be the number of students in sixth grade. Then the equation is given as,

x / 108 = 11 / 9

Simplify the equation, then we have

x / 108 = 11 / 9

x = 108 × 11 / 9

x = 12 × 11

x = 132

The number of the students in the sixth grade will be 132 students.

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The number of people died from aids in U.S. in 2005 are 2,30,68,96,671

Given, diseases tend to spread according to the exponential growth model.

In the early days of aids, the growth factor (i.e. common ratio; growth multiplier) was around 1.9.

In 1983, about 1700 people in the U.S. died of aids.

we have to find the number of people died from aids in 2005.

Let the exponential function, be

P(x) = AB^x

where, A is the initial population of people died of aids in U.S.

B is the growth factor of aids in U.S.

as, B = 1.9

In 1983, x = 0

P(0) = AB^0

1700 = A

Now, P(x) = 1700(1.9)^x

and the number of years from 1983 to 2005 are, 22 years

The number of people died from aids in 2005 be,

P(22) = 1700(1.9)^22

P(22) = 2,30,68,96,671

So, 2,30,68,96,671 people died from aids in 2005.

Hence, 2,30,68,96,671 people died from aids in 2005.

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In Japan, the average cost is $17.61 and in Switzerland, the average cost is $13.55.

An equation is a relationship between two or more variables expressed in equal to form. The equation of two variables look like ax + by=c. It is solved to find the value of variables.

According to the question, the equation are as under:

3x+2y=79.93----------------1

2x+3y=75.87 ----------------2

Multiply equation 1 by 2 and equation 2 by 3 and subtract the result from equation 2 from the result coming from equation 1.

6x+4y=159.86

6x+9y=227.61

Subtracting

6x+4y-6x-9y=159.86-227.61

-5y=-67.75

y=13.55

Put the value of y=13.55 in 3x+2y=79.93

3x+2(13.55)=79.93

3x+27.10=79.93

3x=79.93-27.10

3x=52.83

x=52.83/3

x=17.61

Hence the average cost in Japan is $17.61 and the average cost in Switzerland is $13.55.

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The exponential function is P(t)=60(4)^t that can be expressed in terms of feature of the subsequent form: f ( x ) = a x.

Initial population 'a'=60 rabbits

After 1 year, the rabbit population is 240.

An exponential feature is a mathematical feature of the subsequent form: f ( x ) = a x. wherein x is a variable, and a is a regular known as the bottom of the feature.

Equation of the exponential function.

y=ab^x

Put x=0, y=60

60=ab^0

a=60

Put x=1, y=240

240=60(b)^1

b=4

Thus,

y=60(4)^x

P(t)=60(4)^t

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Answer:

d. [tex]5x^3[/tex] is a monomial

Step-by-step explanation:

⭐What is a monomial?

D is correct because the expression [tex]5x^3[/tex] consists of 1 term only.

⭐What is a linear polynomial?

⭐What is the degree of a polynomial?

A is incorrect because the largest exponent in the expression [tex]x^2 + 5x -3[/tex] is 2, which makes expression A a quadratic polynomial.

⭐What is a binomial?

B is incorrect because the expression [tex]x^2 + 4x - 1[/tex] consists of 3 terms, not 2 terms. B is a trinomial.

C is incorrect because the expression [tex]x+1[/tex] consists of 2 terms, not 1 term. C is a binomial.

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The circumference of a circle with a radius of 11 is 68.1

The route or boundary that encircles any shape in mathematics is defined by the shape's circumference. In other terms, the circumference is also known as the perimeter, which aids in determining how long a shape's outline is.

The formula to calculate the circumference of a circle is C=2[tex]\pi[/tex]r where r is the radius of the circle.

The problem tells us that r= 11, substituting that in the equation and solving:

C=2[tex]\pi[/tex]r =2[tex]\pi[/tex](11) = 22[tex]\pi[/tex]

The value of [tex]\pi[/tex] is approximately 3.14, putting the value of  [tex]\pi[/tex] in the equation:

C= 22(3.14) = 68.08→ 68.1

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The answer is 0because the second derivative will make it 1

Answer:

Below

Step-by-step explanation:

(2x * 5x)^5 = (10x^2)^5 = 100 000 x^10

derivative is  1 000 000 x^9