Which of the following is true about the additive identity?
O The additive identity works with decimals, but not fractions.
OIf x is the additive identity, then x + y = x.
OIt is neither positive nor negative.
The additive identity of a number is the distance from 0 to that number on the number line.

Answer: Tony

Step-by-step explanation: What I did is I took the 7.02 and multiplied it by 4 to make the 50 200 and I got 28.08 so since the time for Simon is larger than the time for Tony, tony went faster because it look him less time. Hope this helps!

Answer: Tony was faster

Step-by-step explanation: To find who ran faster we multiply Tony's time by 4. If it took Tony 7.02 seconds for 50 yards we can multiply that by for to find how long it would have taken him at that speed to run 200 yards.

7.02 x 4 = 28.08

If circuit boards are randomly selected for testing, the probability it takes 10 circuit boards to be inspected before a defective board is found is 0.9833. So, the correct option is b .

This is a geometric distribution problem, where we are trying to find the probability of the number of trials (inspections) until the first success (defective board). The probability of success (finding a defective board) on each trial is 0.02 and the probability of failure (not finding a defective board) on each trial is 0.98.

The formula for the probability of exactly k trials until the first success is given by:

P(X = k) = (1 - p)^(k-1) * p

where p is the probability of success and k is the number of trials.

Plugging in p = 0.02 and k = 10, we get:

P(X = 10) = (1 - 0.02)^(10-1) * 0.02 = 0.9833

So the probability it takes 10 circuit boards to be inspected before a defective board is found is 0.9833.

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The sphere has a volume of 113 cubic units, the sphere's radius is 2.99 units.

Volume is the quantity of space a thing occupies, whereas capacity is a measure of the substance it can store, such as a solid, a liquid, or a gas. While capacity can be measured in virtually any other unit, such as liters, gallons, pounds, etc., volume is measured in cubic units.

the sphere's diameter.

Having said that,

The sphere's volume is equal to[tex]4/3 \pi r^3.[/tex]

The volume is already known.

[tex]113 = 4/3 (3.14) r^3[/tex]

339 = 4 (3.14) r³

339/4 = 3.14 r³

84.75 = 3.14 r³

84.75/3.14 = r³

26.99 = r³

r = ∛26.99

r = 2.99

Consequently, the sphere's radius is 2.99 units.

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Complete question -

Consider a sphere whose volume is 113 cubic units what will be the radius of the mirror?

Para encontrar el equivalente decimal de una fracción, divide el numerador por el denominador. Debido a que el número en el numerador es más pequeño que el número en el denominador, debe colocar el punto decimal después y agregar ceros.

Un número decimal es un número formado por números enteros y fraccionarios, que al escribirse entre enteros y fracciones se separan por una coma, lo que se denomina punto decimal.

En números enteros, estamos familiarizados con los términos miles, centenas, decenas y unidades. Sin embargo, estos números aún pueden continuar con números más pequeños, a saber, décimas, centésimas, milésimas, etc.

En los números decimales, la parte cuyo valor es menor que el número de la unidad se coloca a la derecha de la coma, siempre que el número a la derecha del decimal sea un número de décimas, y cada número a la derecha sea una décima menor que el anterior.

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Using proportions, if a contractor hired 18 workers to complete the construction of a road in 60 days, to complete the construction work 15 days earlier, the additional workers he should hire is 6.

We can use proportions to determine the number of workers needed to complete the work 15 days earlier, which is in 45 days.

Proportions are ratios equated to one another.

The number of workers needed to complete a road construction in 60 days = 18

If the contractor wants to complete the work 15 days earlier, he must complete it in 45 days (60 - 15).

The number of workers needed to complete the construction in 1 day = 1,080 (60 x 18)

The number of workers needed to complete the construction in 45 days = 24 (1,080/45)

The difference between completing the work in 60 days and 45 days = 6 workers (24 - 18).

Thus, proportionately, it will take 6 additional workers to complete the construction work 15 days earlier.

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The length of the candle was 13.5 inches before it was lit.

Let the length of candle in the beginning be c.

Constant rate of change in length of candle=  1.2 inches per hour

Since rate of change is constant so the length of candle can be represented by a linear function [Linear function has constant rate of change.]

Linear function : f(x)= mx+c , where x= independent variable.

m= constant rate of change and c= initial value of function.

Let x = Number of hours after the candle was lit.

Put m=  1.2 , x= 3 and f(x)= 10.5 , we get

c= 13.5

Hence, the length of the candle was 13.5 inches before it was lit.

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The following binary number has the value of 157 in decimal form.

Step 1: Compose the binary number in writing. 10011101

Multiplying each binary digit by the corresponding power of two in step two:

1x27 + 0x26 + 0x25 + 1x24 + 1x23 + 1x22 + 0x21 + 1x20

Solve the powers in Step 3:

1x128+0x64+0x32+1x16+8+4+0x2+1x1=128+0 + 0 + 0 + 16+8+4+0 + 0 + 1

Step 4: Add the figures listed above:

128 + 0 + 0 + 16 + 8 + 4 + 0 + 1 = 157.

A binary number is a number that is expressed in the binary system or base 2 numeral system, according to digital technology and mathematics. It talks about numerical values.by the two distinct digits 1 (one) and 0 (zero). The base-2 system is the positional notation that uses 2 as the radix.

A number that has been divided into a whole and a fraction is called a decimal. To express the numerical value of entirely and partially entire quantities between integers, decimal numbers are used.

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The probability that in an hour there will be at least 10 requests for parts is P(X ≥ 10) = 1 - P(X < 10) = 1 - (Σ P(X = k) for k = 0 to 9) . The probability that the 10th request in the morning requires at least 2 hours of waiting time is P(time until the 10th request ≥ 2 hours) = 1 - P(time until the 10th request < 2 hours) .

i) Poisson Distribution: The Poisson distribution can be used to model the number of requests for parts in a given time period, assuming that the average rate of requests is constant. The Poisson distribution with parameter λ is given by the following formula:

P(k requests in a time period) = (e^-λ * λ^k) / k! , where k is the number of requests, e is the mathematical constant approximately equal to 2.71828, and λ is the average rate of requests.

a) Using Poisson distribution, the probability that in an hour there will be at least 10 requests for parts is given by:

P(X ≥ 10) = 1 - P(X < 10) = 1 - (Σ P(X = k) for k = 0 to 9)

b) To find the probability that the 10th request in the morning requires at least 2 hours of waiting time, we need to find the distribution of the time between requests. Since the requests are modeled as a Poisson process, the time between requests is modeled as an exponential distribution with parameter λ.

ii) Gamma Distribution: The gamma distribution is a continuous probability distribution that can be used to model the sum of k independent and identically distributed exponential random variables. In this case, the distribution of the time between requests is exponential, and the sum of 10 independent exponential random variables gives us the distribution of the time until the 10th request.

a) To find the probability that in an hour there will be at least 10 requests for parts using the gamma distribution, we need to first find the distribution of the number of requests in an hour.The sum of 10 independent exponential random variables with rate λ follows a gamma distribution with shape parameter k = 10 and scale parameter 1/λ.

Using the cumulative distribution function of the gamma distribution, the probability that in an hour there will be at least 10 requests for parts is given by:

P(number of requests ≥ 10) = 1 - P(number of requests < 10)

b) Using Gamma distribution, the probability that the 10th request in the morning requires at least 2 hours of waiting time is given by:

P(time until the 10th request ≥ 2 hours) = 1 - P(time until the 10th request < 2 hours) , where the cumulative distribution function of the gamma distribution can be used to calculate the probability.

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On dilating the point X(6,5) with scale factor of -2, the value is obtained as X(-12,-10).

What is dilation?

Resizing an item uses a transition called dilation. Dilation is used to enlarge or contract the items. The result of this transformation is an image with the same shape as the original. However, there is a variation in the shape's size. The initial shape should be stretched or contracted during a dilatation.

The coordinate point for X is given as X(6,5).

The dilation is centered at the origin (0,0).

The dilation scale factor is given as -2.

To find the value of X' use the formula -

X(a,b) → X[(a×(-2)) , (b×(-2))]→ X'

Substitute the values in expression -

X(6,5) → X[(6×(-2)) , (5×(-2))]

X(6,5) → X'(-12,-10)

Therefore, the coordinate point is X'(-12,-10).

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The sum of the positive integers not exceeding 5 is 1 + 2 + 3 + 4 = 10

The proof of this statement is constructive, as it will provide a way to explicitly construct a positive integer which is equal to the sum of the positive integers not exceeding it.

To prove this, we will use the following formula:

Let n = the positive integer

Let S = the sum of the positive integers not exceeding n

n = 1 + 2 + ... +n-1 + n

S = 1 + 2 + ... +n-1

Therefore, n = S + n

For example, let n = 5. The sum of the positive integers not exceeding 5 is 1 + 2 + 3 + 4 = 10. Therefore, 5 = 10 + 5, which is true. This proves that for any positive integer, n, it is equal to the sum of the positive integers not exceeding it.

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He answers the same number of questions correctly as he answers incorrectly in each round.

Equation is a physical and mathematical statement that describing physical phenomena and the relationship between different physical quantity typically consist of variable simple presenting physical quantity and then it personal variable may be pointed such as your energy.

For the pair of equations to be a system of equations, the number of questions answered correctly must equal the number of questions answered incorrectly in each round. Therefore, the equation 5x - 3y = 22 must have the same number of x and y variables, and the equation 10x - 4y = 46 must also have the same number of x and y variables. This is the only condition that must be true for the pair of equations to be a system of equations.

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The flower associated to the given probability is the sunflowers.

We want to find the probability of randomly choosing a flower is:

Now, remember that the probability of randomly selecting a type of flower is equal to the quotient between the number of that type of flower and the total number of flowers.

Here we know that the probability is:

P = 0.5

We can rewrite that as:

P = 1/2

If we rewrite the denominator as 16, we will get:

P = 8/16

And we know that there are 8 sunflowers, then sunflower is the correct option.

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The complete question is:

There are 16 flowers in a vase. Four flowers are daisies, 1 is rose, 3 are tulips and the rest are sunflowers. Suppose the probability of randomly choosing a flower is 0.5

Which of the following flowers could it be?

Answer:

Step-by-step explanation:

The volume of a solid obtained by rotating a two-dimensional region about an axis can be found using the method of cylindrical shells.

The region in question is bounded by the parabolic curve y = x^2, the vertical line x = 5, and the x-axis. We can find the volume of the solid obtained by rotating this region about the x-axis by adding up the volumes of an infinite number of infinitely thin cylindrical shells with radius equal to the distance from the axis to the boundary of the region at each y-value.

The formula for the volume of a cylindrical shell is given by V = 2 * pi * y * dV, where y is the distance from the x-axis to the boundary of the region at each y-value, and dV is the incremental volume at that y-value.

To find the volume, we need to find the incremental volume dV, and integrate the cylindrical shell formula over the region bounded by y = x^2 and x = 5. The incremental volume is given by dV = pi * (R^2 - r^2)dy, where R is the outer radius, r is the inner radius, and dy is the incremental change in y.

In this case, the outer radius R is equal to the value of x = 5 when y = x^2, and the inner radius is equal to zero. Thus, the incremental volume is given by: dV = pi * (5^2 - 0^2)dy = 25 * pi * dy.

The bounds of the integration are from 0 to 5^2 = 25. Integrating the cylindrical shell formula over this range, we find that the volume of the solid obtained by rotating the region bounded by y = x^2, x = 5, and y = 0 about the x-axis is:

V = 2 * pi * integral from 0 to 25 of (y * 25 * pi)dy = 2 * pi * (25^2 * 25 / 2) = 15625 * pi cubic units.

So, the volume of the solid is approximately 49,093 cubic units.

Point that represents height after 10 years is (10 , 8.25).

A line is a one-dimensional figure, which has length but no width. A line is made of a set of points which is extended in opposite directions infinitely.

Given points

C(3, 3) and D(11, 9) are on a directed line segment that represents height of tree over 16 years.

Equation of the line segment

(y - y₁) = [(y₂ - y₁)/(x₂ - x₁)](x ₋ x₁)

(y - 3) = [(9 - 3)/(11 - 3)](x - 3)

y - 3 = (6/8)(x - 3)

y - 3 = (3/4)x - 9/4

y = (3/4)x - 9/4 + 3

y = (3/4)x + 3/4

y is height, x is number of years

In 10 years,

= (3/4)10 + 3/4

y = 30/4 + 3/4

y = 33/4 = 8.25

Point is (10 , 8.25)

Hence, (10, 8.25) is point for height of tree after 10 years.

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Explanation:

The common ratio is calculated by dividing each term by its previous one.

The nth term formula for this particular geometric sequence is:

[tex]a_n = a*r^{n-1}\\\\a_n = 7*4^{n-1}\\\\[/tex]

The last step is to plug n = 8 into that formula.

[tex]a_n = a*r^{n-1}\\\\a_n = 7*4^{n-1}\\\\a_8 = 7*4^{8-1}\\\\a_8 = 7*4^{7}\\\\a_8 = 7*16384\\\\a_8 = 114688\\\\[/tex]

The 8th term is 114688

Avoid using commas to separate out the digits. This is because commas are used to separate each term of the geometric sequence.

8th term of this geometric sequence is 114,688.

In a geometric sequence, each term is found by multiplying the previous term by a common ratio. To find the 8th term, we need to know the common ratio and the first term. Given that the first term is 7 and the second term is 28, we can find the common ratio as follows:

r = 28/7 = 4

Now that we know the common ratio, we can find the 8th term by multiplying the first term by the common ratio raised to the power of 7:

a_8 = 7 * r^(8-1) = 7 * 4^7 = 7 * 16,384 = 114,688

Therefore, the 8th term of the sequence is 114,688.

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Answer:

No, it is not an infinite solution.

Step-by-step explanation:

4x-4=4              

Add 4 to each side

4x=8

Divide 4 on each side

x=2

Answer:

No

Step-by-step explanation:

An infinite solution has both sides equal. For example, 6x + 2y - 8 = 12x +4y - 16. If you simplify the equation using an infinite solutions formula or method, you'll get both sides equal, hence, it is an infinite solution.

The tank contains 240 liters of fluid in which 50 grams of salt is dissolved. pure water is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate, After 20 minutes, the amount of salt in the tank is still 50 grams.

In order To calculate the amount of salt in the tank after 20 minutes, we basically use the formula:  Salt (in grams) = (Amount of salt in the tank x Time) / Total volume.So, after 20 minutes, the amount of salt in the tank is:  (50 grams x 20 minutes) / 240 liters = 8.33 grams.    

As we can see, both methods produce the same result, confirming that the amount of salt in the tank after 20 minutes is still 50 grams. since the rate of pumping in salt water is equal to the rate of pumping out salt water, so the total amount of salt remains the same.

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A tank contains 240 liters of fluid in which 50 grams of salt is dissolved. pure water is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate. find the number of grams of salt in the tank after 20 minutes

Answer:

length=9

width=4m

Step-by-step explanation:

Let the width of the rectangle be, x and the length be, x+5

perimeter=2(L+W)

26 m=2(x+5+x)

26=2x+10+2

26-10=4x

16=4x

x=

length=9m

width=4m

Answer:

the solution to the system is x = 1 and y = 5/2.

Step-by-step explanation:

To find the values of x and y, we can simplify each equation in the system and then substitute the value of x into the other equation to find y.

Starting with the first equation:

y - 1 = 3x / 2

2 * (y - 1) = 3x

3x = 2y - 2

Next, we substitute the value of 3x/2 from the first equation into the second equation:

5x + 1 = 4x

x = 1

Finally, we can substitute the value of x = 1 into the first equation to find y:

y - 1 = 3 * 1 / 2

y - 1 = 3 / 2

y = 5 / 2

So the solution to the system is x = 1 and y = 5/2.

answer is c because i did math and got it right

Answer:

the answer is 330000

Step-by-step explanation:

just do 22,000 divided by 4 and that 5, 500 so its 5,500 miles a month and then do 5,500 x 60= 330000

The probability is 0, 1/9, and 1/36 for getting a sum of 1, the sum of 5, and the sum of 12 occurs.

Probability is something that is to happen or a chance that an event will occur.

For two rolled dice, the total outcome is 6² = 36

Probability = Expected outcome/Total outcome

a) Pr of getting a sum of 1 = 0/36 = 0

we have a pair of dice, the least sum we can have is 2

b) The event that occurs a sum of 5 are (1, 4), (4, 1), (3, 2), (2, 3)

n(E) = 4

Pr of getting a sum of 5 = 4/36 = 1/9

c)The probability of getting a sum of 12 is (6, 6)

n(E) = 1

Pr of getting a sum of 12 = 1/36

Therefore, the probability that occurs a sum of 1, the sum of 5, and the sum of 12 are 0, 1/9, and 1/36 respectively.

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The first five terms will be -4, 3, 10, 17 and 24.

The 34th term will be 227

An arithmetic sequence is one in which each phrase grows by adding or removing a certain constant, k. The difference between consecutive terms in an arithmetic series is always the same and is known as the common difference d.

Based on the information, it should be noted that the AP is given as An = - 11 + 7b

First term = -11 + 7(1) = -4

Second term = -11 + 7(2) = 3

Third term = -11 + 7(3) = 10

Fourth term = -11 + 7(4) = 17

Fifth term = 24

The 34 term will be:

= -11 + 7(34)

= 227

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Given the explicit formula for an arithmetic sequence find the first five terms and the term named in the problem. An=-11+7b. Find a34

The area of the shaded region of the semicircle is 108π mm²

Area is defined as the total space taken up by a flat (2-D) surface or shape of an object.

Given that, a semicircle with a diameter of 24 mm, a circle is fitted in it, we need to find the measurement of the area which is shaded.

The diameter of the smaller circle = radius of semicircle.

Therefore,

Radius of smaller circle = 24/4 = 6 mm

To find the area of shaded region, we will subtract the area of the smaller circle from the area of semicircle.

Area of a circle = π × radius² {area of semicircle is just half of it}

Area of shaded region = π × 12² - π × 6²

= π(144-36)

= 108π

Hence, the area of the shaded region of the semicircle is 108π mm²

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The required correct answer is A. the five-number summary.

A box and whisker plot, often known as a box plot, shows a data set's five-number summary. The minimum, first quartile, median, third quartile, and maximum make up the five-number summary. A box is drawn from the first quartile to the third quartile in a box plot. At the median, a vertical line passes through the box.

The correct answer is A. the five-number summary. A boxplot is a graphical representation of the distribution of a set of data, and it provides information about the shape, spread, and skewness of the data. The five-number summary is used to construct a boxplot and includes the minimum value, first quartile (Q1), median, third quartile (Q3), and maximum value.

The boxplot uses these five values to display the range of the data and highlight any outliers or unusual observations. Knowing the five-number summary is sufficient to create a boxplot, while knowing all of the individual observations or the mean and standard deviation is not necessary.

Final answer: A. the five-number summary.

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The height of the plant A would be 95cm, while the height of the plant B would be 87 cm

We can use an equation to represent the height of each plant as a function of time t:

Plant A: h_A = 75 + 10t

Plant B: h_B = 55 + 12t

We want to find the time t at which the two plants will be the same height, so we can set the two equations equal to each other:

75 + 10t = 55 + 12t

Solving for t, we get:

10t = 20

t = 2

So, after 2 months, the two plants will be the same height. To find the height at that time, we can substitute t = 2 into either equation:

h_A = 75 + 10t = 75 + 10 * 2 = 95

h_B = 55 + 12t = 55 + 12 * 2 = 87

So, after 2 months, the plants will both be 95 cm tall.

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The perimeter of the trapezoid is 50 cm.

A trapezoid, commonly referred to as a trapezium, is a quadrilateral or a polygon with four sides. It has a set of parallel opposing sides and a set of non-parallel sides. The bases and legs of the trapezoid are known as the parallel and non-parallel sides, respectively.

Given the trapezoid,

let us consider ABCD be the trapezoid,

so given angle B = 90°

AB = 12 cm, AD = 10 cm, and BC = 15 cm

let us draw a perpendicular from D on BC parallel to AB

which forms the right triangle DEC

from the Pythagorean theorem, from the figure attached in the image.

DC² = DE² + EC²

DC² = 12² + 5²

DC² = 144 +25

DC² = 169

DC = 13 cm

perimeter is the sum of all sides,

P = AB + BC + AD + DC

P = 12 + 15 + 10 + 13

P = 50 cm

Hence perimeter is 50 cm.

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An outcome or collection of outcomes from a sample space is called an event.

A random experiment's sample space is the collection of all conceivable results. A random experiment's related event is a subset of the sample space. Any outcome's probability is a number between 0 and 1.

Each consequence or set of outcomes in an experiment constitutes an event.

An outcome is a potential result of an experiment or trial in probability theory. Each experiment's possible results are distinct, and alternative outcomes are mutually exclusive (only one outcome will occur on each trial of experiment).

The sample space (also known as sample description space, possibility space, or outcome space) of an experiment or random trial is a collection of all potential outcomes or results of that experiment in probability theory.

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The speed of the car travelled after converting 85 meter per hour into feet per second is equal to ( 0.08 feet per seconds )(round to 2 decimal places)

Speed of the car in meter per hour is equal to 85 mph.

Conversion of unit  meter per hour in feet per second is :

1 meter = 3.28084 feet

1 hour = 60 minutes

          = 3600 seconds

85 mph = ( 85 × 3.28084 feet ) / ( 3600 seconds )

⇒ 85 mph = ( 278. 8714 feet ) / ( 3600 seconds )

⇒ 85 mph = ( 0.07746 feet per seconds )

⇒ 85 mph = ( 0.08 feet per seconds )( round to 2 decimal places )

Therefore, the car travelled in feet per seconds is equal to ( 0.08 feet per seconds ).

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The most appropriate measure of spread for this data is standard deviation, because the boxplot is skewed to the right.

The most appropriate measure of spread for this data is standard deviation. The data is represented by a boxplot, which is a graphical representation of the data that shows the median, quartiles, and range of the data. In this case, the boxplot is skewed to the right, meaning that the data is not normally distributed. When the data is not normally distributed, the standard deviation is the best measure of spread to use. Standard deviation measures the spread of data by calculating the distance between each data point and the mean, and then taking the average of these distances. This allows us to accurately measure the spread of data that is not normally distributed. Therefore, standard deviation is the most appropriate measure of spread for this data.

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