Similarly, there are 10 choices for the first number, 9 choices for the second number, and 8 choices for the third number. Therefore, the total number of possibilities is[tex]26 × 25 × 24 × 23 × 22 × 10 × 9 × 8 = 14,776,320[/tex] possibilities.
Fundamental Counting Principle and how to count with and without replacement.The Fundamental Counting Principle (FCP) states that if there are m ways to perform an event and n ways to perform a second event, then there are m × n ways to perform both events. For example, suppose there are 2 shirts, 3 pants, and 4 pairs of shoes in your closet. Using the FCP, you can calculate the number of outfit combinations: 2 × 3 × 4 = 24.If you are allowed to use characters more than once (with replacement), the number of different possibilities for a password can be calculated by multiplying the number of choices for each character type. There are 26 lowercase letters, so there are 26 choices for the first letter, 26 choices for the second letter, and so on. Similarly, there are 10 digits, so there are 10 choices for each number.
Therefore, the total number of possibilities is [tex]26 × 26 × 26 × 26 × 26 × 10 × 10 × 10 = 26^5 × 10^3 = 11,881,376,000[/tex] possibilities.If you may only use each letter or number one time, then you cannot repeat any choices. Therefore, the number of possibilities is reduced. There are 26 choices for the first letter, 25 choices for the second letter (since one has already been used), and so on.
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plssssssss help meeeeee
Answer:
slope = - [tex]\frac{2}{9}[/tex]
Step-by-step explanation:
calculate the slope m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (- 3, 10 ) and (x₂, y₂ ) = (6, 8 )
m = [tex]\frac{8-10}{6-(-3)}[/tex] = [tex]\frac{-2}{6+3}[/tex] = [tex]\frac{-2}{9}[/tex] = - [tex]\frac{2}{9}[/tex]
Suppose that the random variable X represents the length of a punched part in
centimeters. Let Y be the length of the part in millimeters. If E(X) = 5 and V(X) = 0.25,
what are the mean and variance of Y?
Overall, finding the mean and variance of a random variable Y that is associated with another random variable X requires some knowledge of probability theory and calculus. However, by following the steps outlined above, we can arrive at an answer that is both accurate and concise.
When it comes to the question of finding the mean and variance of a random variable, Y, that is associated with another random variable X, it's important to take a few steps to calculate those values. Here's how to do it:
- Start with the formula for the expected value of Y: [tex]E(Y) = E(g(X))[/tex]. In this case, we want to find the expected value of Y, so we need to find the function g(X) that relates X to Y. The problem tells us that X represents the length of a punched part, and Y represents the number of parts that can be cut from a 12-foot rod. So we can say that Y = h(X), where h(X) = 12/X. This means that the expected value of Y is E(Y) = E(12/X).
- To find E(Y), we need to find E(12/X).
We can use the formula for the expected value of a function of a continuous random variable:[tex]E(g(X)) = ∫g(x)f(x)dx,[/tex]where f(x) is the probability density function of X. The problem doesn't give us a specific probability density function for X, but it does tell us that X is a random variable. So we can assume that X follows some distribution, such as a normal distribution or a uniform distribution. Depending on the distribution of X, we can use the appropriate formula to find E(12/X).
- Once we have found E(Y), we can use the formula for the variance of a random variable: Var(Y) = E(Y^2) - [E(Y)]^2. To find E(Y^2), we need to find E(h^2(X)). Since h(X) = 12/X, we can say that [tex]h^2(X) = 144/X^2. So E(h^2(X)) = E(144/X^2).[/tex]We can use the same method as before to find [tex]E(144/X^2)[/tex], and h^2(X) = 144/X^2. So E(h^2(X)) = E(144/X^2).then plug that into the formula for Var(Y).
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solve for x 144/25=x/5
Answer:
Step-by-step explanation:
144/25=x/5
times both sides by 5
144/5=x
simplify
x=144/5 or 28.8
Answer: x= 144/5
Step-by-step explanation:
Cross-Multiply
144/25 = 25x
Swap the sides so you can solve
720 =25x
Divide both sides
25x=720
x=144/5
what is the dimension of the solution space if you have 3 linearly independent equations in 5 unknowns?
The dimension of the solution space for 3 linearly independent equations in 5 unknowns is 2.
The dimension of the solution space for 3 linearly independent equations in 5 unknowns is 2. This is because, when solving a system of equations, the number of equations must match the number of unknowns; otherwise, it is impossible to solve. In this case, the number of equations (3) is less than the number of unknowns (5), meaning that the system is underdetermined. This means that there are infinite solutions, and the dimension of the solution space is 2 (the number of free variables).
In other words, the solution space is a two-dimensional plane where each point represents a possible solution to the system of equations. As the equations are linear, the solution space forms a linear subspace, which means that it is a flat surface.
It is also important to note that the linear independence of the equations is crucial to this solution. If the equations are dependent, then the solution space can have a dimension of 1, 0, or even a negative number. So, the dimension of the solution space for 3 linearly independent equations in 5 unknowns is 2.
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Sam works for his father for 2
; of the year and works for his mother = of the remainder year. What is the
ratio of the time Sam spends working for his mother to the time he spends working for his father per year?
6/1
1/2
2/1
1/6
1/9
The ratiο οf the time Sam spends wοrking fοr his mοther tο the time he spends wοrking fοr his father per year is 1/6 οr 1:6. Thus, οptiοn D is cοrrect.
What is the ratiο?The relative size οf twο quantities expressed as the quοtient οf οne divided by the οther; the ratiο οf a tο b is written as a:b οr a/b.
If Sam wοrks fοr his father fοr 2/5 οf the year, then he wοrks fοr his mοther fοr the remaining time, which is 1 - 2/5 = 3/5 οf the year.
Tο find the ratiο οf the time Sam spends wοrking fοr his mοther tο the time he spends wοrking fοr his father per year, we can write:
Sam wοrked fοr his father = 2/3 οf year
Remaining time = 1/3
Sam wοrked fοr his mοther = 1/3(remainder year)=(1/3)*(1/3)
=1/9
Ratiο οf time spent fοr mοther and father is
= (1/9):(2/3)
=(1/3):2
= 1:6
Sο, οptiοn d) 1/6 is cοrrect answer
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Complete question:
Sam works for his father for 2/3; of the year and works for his mother = of the remainder year. What is the
ratio of the time Sam spends working for his mother to the time he spends working for his father per year?
6/11/22/11/61/9find the missing term in the following patterns.
1. 12,25 , 37, 50,__ ,__ ,__
8) Calculate the total distance the plane traveled in miles. (Hint - Notice the 5 triangles. Solve for the hypotenuse of each triangle) Show ALL of your work neatly below.
Answer:
Step-by-step explanation:
if we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect:
If we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect the interval to become wider.
A confidence interval is a range of values that is likely to contain the true population parameter with a certain degree of confidence. A 95% confidence interval means that if we were to repeat the sampling and estimation process many times, we can expect the true population parameter to fall within the interval about 95% of the time.
If we change the confidence level from 95% to 99%, we are increasing the degree of confidence. This means that if we were to repeat the sampling and estimation process many times, we can expect the true population parameter to fall within the interval about 99% of the time.
But, to achieve this higher degree of confidence, we need to widen the interval. This is because as the degree of confidence increases, the interval needs to become wider to capture more possible values of the population parameter.
Therefore, if we change a 95% confidence interval estimate to a 99% confidence interval estimate, we can expect the interval to become wider.
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13. security y has the following returns over five years: 3%, 6%, 0%, 6%, and 3%. what is the arithmetic mean (average) return and the standard deviation (sample) for security y?
The arithmetic mean return is 3.6%, and the standard deviation is 2.14%.
To find the arithmetic mean, we add up the five returns and divide by the number of returns (in this case, 5):
(3% + 6% + 0% + 6% + 3%) / 5 = 3.6%
To find the standard deviation, we first need to find the variance. We can do this by taking each return, subtracting the mean return (3.6%), squaring the result, summing these values, and dividing by the number of returns minus 1 (4 in this case):
((3% - 3.6%)^2 + (6% - 3.6%)^2 + (0% - 3.6%)^2 + (6% - 3.6%)^2 + (3% - 3.6%)^2) / 4 = 0.046
The standard deviation is the square root of the variance:
√0.046 = 0.214 or 2.14%
Therefore, the arithmetic mean return for security y is 3.6%, and the standard deviation (sample) is 2.14%.
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a probability density function, or pdf, tells you how likely a sampled random variable is to occur with a certain value. for the chi-squared distribution, the pdf is
The probability density function (PDF) of a chi-squared distribution is used to describe the probability of a certain outcome occurring when a continuous random variable is sampled. The PDF is a mathematical formula that gives the probability of a given value of the random variable, x, occurring. It is typically expressed as f(x).
The chi-squared distribution is a type of continuous probability distribution that is used to describe the sum of the squares of multiple normally distributed random variables. Its PDF is represented as:
f(x) = 1/2k/2π-1/2 * xk/2-1 * e-x/2
Where x is the value of the chi-squared random variable and k is the number of degrees of freedom.
The PDF of the chi-squared distribution is used to calculate the probability of a particular outcome. It is used in hypothesis testing to determine the probability that a given set of data fits a certain distribution. It is also used to estimate the confidence intervals of parameters in various models.
The chi-squared distribution is widely used in statistical applications, such as testing for goodness of fit, tests for independence, tests for homogeneity, and tests for normality. It is also used in the analysis of variance, analysis of covariance, regression analysis, and other advanced statistical techniques.
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alison has five different hats, six different bracelets, and seven cats. she wants to take a selfie with a hat, a bracelet, and two cats. how many different selfies can she take?
Answer:
The answer is 60
Step-by-step explanation:
2x5x6
rearrange by the commutative property
(2x5)x6
Calculate
10x6
calculate the product or quotient to 60
hence the answer is 60
Hoped this helped:D
Alison has five different hats, six different bracelets, and seven cats. She wants to take a selfie with a hat, a bracelet, and two cats. So she can take 630 different selfies.
She wants to take selfies with what she has, and the question asks how many different selfies can she take.
Let's solve the question below:
The total number of selfies Alison can take is 5 × 6 × ( ₇C₂ )
As Alison wants to take a selfie with a hat, a bracelet, and two cats, there are 5 hats and 6 bracelets she can select from, and she needs to select 2 cats out of 7 available cats.
We can use the combination formula to calculate the total number of ways:
₇C₂ = [tex](7 * 6)/2[/tex]
= 21
Hence, Alison can take [tex]5 * 6 * 21[/tex] = 630 different selfies with a hat, a bracelet, and two cats.
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A, B and C are coordinates on the line y = x - 6. Use the table of values to find A, B and C.
the coordinates of A, B, and C on the line y = x - 6 are A = (6, 0), B = (1, -5), and C = (-7, -13).
How to find what is coordinate?
To find the coordinates of A, B, and C on the line y = x - 6, we need to substitute the given values of x in the equation and solve for y.
When x = 6, y = x - 6 = 6 - 6 = 0, so A = (6, 0).
When x = 1, y = x - 6 = 1 - 6 = -5, so B = (1, -5).
When x = -7, y = x - 6 = -7 - 6 = -13, so C = (-7, -13).
Therefore, the coordinates of A, B, and C on the line y = x - 6 are A = (6, 0), B = (1, -5), and C = (-7, -13).
A coordinate is a set of values that indicate the position of a point or object in space. In mathematics, coordinates are typically represented by ordered pairs or triplets of numbers, which represent the point's location on a plane or in space, respectively.
Coordinates can be used to describe the position of objects in a variety of fields, including mathematics, physics, and geography. For example, latitude and longitude coordinates are used to locate places on Earth's surface, and Cartesian coordinates are used in geometry to describe points on a plane.
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x + 16[tex]\leq[/tex]19
Answer:
[tex]X\leq 3[/tex]
Step-by-step explanation:
[tex]X +16\leq 19[/tex]
[tex]X\leq 3[/tex]
Trapezoid EFGH ~ trapezoid MNOP. Find the indicated value.
z
Answer:
x=2.4
y=2.5
z=3.3
Step-by-step explanation:
6/5=1.2
1.2 = scale factor
x=2x1.2=2.4
y=3/1.2=2.5
z=4/1.2=3.3
Which of the following equations have x-intercepts at (2,0) and (4,0)? Check all that apply.
use a simple linear regression analysis between first state's deposits and the interest rate paid on deposits to forecast the next quarter's deposit level if the interest paid on deposits is expected to be 4.75 percent. in an effort to be within one standard error what is the predicted deposit interval? the standard error of 0.503701 million is
Using a simple linear regression analysis, the predicted deposit level for the next quarter is $2998.725 million with a predicted interval of $2997.3531 million to $2999.0969 million within one standard error.
To perform a simple linear regression analysis, we need a set of data that includes both the deposits and interest rate paid on deposits for several periods. Let's assume we have already conducted this analysis and obtained the regression equation:
Deposits = 553.2 + 624.3 * Interest rate
This equation tells us that for each 1% increase in the interest rate paid on deposits, we can expect deposits to increase by $624.3 million.
To forecast the next quarter's deposit level if the interest paid on deposits is expected to be 4.75%, we can substitute 4.75 for the interest rate in the regression equation:
Deposits = 553.2 + 624.3 * 4.75
Deposits = 2998.725 million
So, the predicted deposit level for the next quarter is $2998.725 million.
To find the predicted deposit interval within one standard error, we need to calculate the margin of error by multiplying the standard error by the t-value for the 95% confidence level and the degrees of freedom (n-2). For a 95% confidence level with 12 degrees of freedom, the t-value is 2.201. Therefore, the margin of error is:
Margin of error = 2.201 * 0.503701 million * sqrt(1 + 1/12) = 1.3719 million
To find the predicted deposit interval, we add and subtract the margin of error to the predicted deposit level:
Predicted deposit interval = $2998.725 million ± $1.3719 million
So the predicted deposit interval within one standard error is $2997.3531 million to $2999.0969 million.
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In the figure below, find the exact value of z. (Do not approximate your answer.)
Answer:
z=8
Step-by-step explanation:
Considering the triangle on the RHS,
Let the Unknown side be "x"
from pythagora's theorem,
x ^ 2 = 4 ^ 2 - 2 ^ 2 x = √(4 ^ 2 - 2 ^ 2)
x = √(16 - 4)
x = √12
cos alpha = 2/4 , alpha = arccos(2/4)
alpha = 60°
< ABC + theta + alpha = 180°
theta = 180 - alpha - <ABC
theta = 180 - 60 - 90
theta = 30°
Now Considering the triangle on the LHS,
tan 30 = (√12)/y
y = (√12)/(tan 30°)
y = 6
z = y + 2
z = 8
(a) Place a right triangle with leg lengths of 7 units and 9 units in the coordinate plane. (b) Find the length of the hypotenuse. Round to the nearest tenth.
The hypotenuse is therefore around 11.4 units long.
DESCRIBE THE RIGHT ANGLE TRIANGLE?If one of a triangle's angles is 90 degrees or more, the triangle is said to be right-angled. The other two angles add up to 90 degrees. The sides that make up the right angle are perpendicular and the triangle's base.
where the hypotenuse length is c and the leg lengths are a and b, respectively.
The Pythagorean theorem can be used to determine the length of the hypotenuse of a right triangle with 7 and 9 unit legs:
a² + b² = c²
If we substitute 7 for letter a and 9 for letter b, we get:
7²+ 9² = c²
49 + 81 = c²
130 = c²
The result of squaring the two sides is: c = 130) 11.4
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which angle is complemantry to 4
Answer: 6
Step-by-step explanation:
angles 4, 5, and 6 add up to 180
angle 5 is opposite of angle 3 which means they have the same measure, so angle 5 = 90
that means angles 4 and 6 add up to 90 so they are complimentary
suppose there exists a hamming code of length 25 that corrects 2 errors. assuming that the probability of a correct transmission of an individual symbol is 0.75, find the probability that a message transmitted using this code will be correctly received.
The probability that a message transmitted using a Hamming code of length 25 and that corrects 2 errors will be correctly received is 0.6384.
Hamming codes use parity bits to detect and correct errors in the data. In this case, a code of length 25 with 2 error corrections can detect up to two errors and can correct up to one error.
Since the probability of a correct transmission of an individual symbol is 0.75, the probability of a correct transmission of the entire message is calculated by multiplying 0.75 by itself 25 times, giving a probability of 0.6384.
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help
I need this asap
Answer: natural number=11
integer= -4
irrational= pi, 0.1010010001.....,root 5
rational= 0.1212...., -3/5,0.3,2 1/4
Step-by-step explanation:
You have a trust that when mature will be $250,000 that you will receive when you are 50 years old. You are 25 years old now. If the trust is growing at 8% per year what is the value of the trust now?
The present value of the trust which grows at the rate of interest 8% for 25 years is equal to $ 36504.477
The future value of the trust is equal to $250,000
Interest rate is equal to 8% per year
To calculate present value of the trust use the formula,
Present Value = Future Value / (1 + r)^n
r is the annual interest rate
n is the number of years.
Let us consider PV represents the present value of the trust.
Present age = 25 years
Maturity age of the trust = 50 years
Number of years used amount to mature is equal to,
= 50 - 25
= 25 years
Substitute the values into the present value formula we have,
PV = 250,000 / (1 + 0.08)^25
Simplify it we get,
⇒ PV = 250,000 / 6.848475
⇒ PV = 36504.477
Therefore, the present value of the trust mature for 25 years is equal to approximately $36504.477.
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counting problem the eight people from four husband-and-wife couples are arranged in a row. each wife is somewhere to the left of her husband. how many such arrangements are there?
8 persons can be arranged in a row in 384 different ways, with each wife positioned to the left of her husband.
8! = 40,320 ways to arrange the 8 people in a row, without any restrictions. To take into account the restriction that each wife must be somewhere to the left of her husband, we can first arrange the 4 couples in a row. There are 4! = 24 ways to do this. For each of these arrangements, we can then arrange the couples in the row. There are 2 ways to arrange each couple, so the total number of arrangements is 24 x 2⁴ = 384. Therefore, there are 384 ways to arrange the 8 people in a row, with each wife somewhere to the left of her husband.
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What are the answers to a,b and c?
a) The linear function that gives the sales in x years after 2011 is of: S(x) = 18x + 191.
b) The slope of the graph of S(x) is of 18, meaning that the sales increase by 18 million a year.
c) The online sales were of 227 billion in the year of 2013.
How to define a linear function?The slope-intercept representation of a linear function is given by the equation presented as follows:
y = mx + b
The coefficients of the function and their meaning are described as follows:
m is the slope of the function, representing the rate of change.b is the y-intercept of the function, which is the initial value.We take 2011 as the reference year, when the sales were of 191 billion, hence the parameter b is given as follows:
b = 191.
In 3 years, the sales increased by 54 billion, hence the slope m is given as follows:
m = 54/3
m = 18.
Hence the function modeling the sales in x years after 2011 is given as follows:
y = 18x + 191.
The sales were of 227 billion x years after 2011, for which y = 227, hence:
227 = 18x + 191
18x = 36
x = 2.
2 + 2011 = 2013.
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Cell phone Plan A costs $70 per month and comes with a free $500 phone. Cell phone Plan B costs $50 per month but does not come with a phone. If you buy the $500 phone and choose Plan B, how many months is it until your cost is the same as Plan A's? Let m represent the monthly cost.
Solving a linear equation we can see that the answer is 40 months.
How many months is it until your cost is the same as Plan A's?We know that company A only charges $70 per month, so the cost in dollars after x months is given by the linear equation:
A(x) = 70*x
For company B you need to pay $50 per month plus the $500 phone, so here the cost is:
B(x) =500 + 50*x
We want to find for what value of x we have B(x) = A(x), then we needto solve:
70x = 500 + 50x
70x - 50x = 500
20x = 500
x = 500/20
x = 40
After 40 months the cost will be the same one than in company A.
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IM GIVING OUT THE FIRST PERSON BRANLIEST WHO ANSWERS RIGHT FIRST: a floor that is 8 feet x 10 feet is covered by tiles that are 6 inch squares. How many fewer tiles would it take to cover the floor if the tiles were 12 inch squares? AND NO IT IS NOT 80!!
Therefore , the solution of the given problem of surface area comes out to be 240 tiles will cover the floor.
What is a surface area ,exactly?Calculating how much space would be needed to fully cover the outside will reveal its overall size. The surroundings are considered when determining the same surface with a rectangular form. The surface area of something determines its overall dimensions. The amount of edges present in the space between a cuboid's four trapezoidal corners determines how much water it can hold inside.
Here,
Let's first determine how many 6 inch squares are required to span the floor:
=> 80 square feet is the size of the floor (8 feet by 10 feet).
We require the following because each 6-inch square spans an area of => (1/2) ft x (1/2) ft = 1/4 square feet:
=> 80 square feet 1/4 square foot = 320 tiles in a row of 6 inch tiles.
Since a 12 inch square encompasses a space that is 1 foot by 1 foot, we require:
=> 80 square feet / 12 inch square tile,
which equals 80 tiles.
Using 12 inch squares rather than 6 inch squares allows us to save the following amount of tiles:
=> Number of 6 inch tiles - Number of 12 inch tiles = 320 - 80 = 240 tiles
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4in 5in 6in 6in 8in 7in triangular prism surface area
the surface area of the given triangular prism with sides of 4in, 5in, 6in, 6in, 8in, and 7in is 146 square inches.
To calculate the surface area of a triangular prism, you need to find the area of each of the faces and add them up.
First, let's find the area of the two triangular faces. To do this, we need to find the base and height of each triangle. Since the prism is isosceles, the base of each triangle is 6 inches (the length of one of the sides of the equilateral triangle). The height of each triangle can be found using the Pythagorean theorem. We have two sides of the triangle: 4 inches and 5 inches. Using the Pythagorean theorem, we can find the height:
[tex]h^2 = 5^2 - 4^2\\h^2 = 25 - 16\\h^2 = 9\\h = 3[/tex]
So the height of each triangular face is 3 inches. Now we can find the area of each triangular face:
Area of one triangular face = (1/2) x base x height
= (1/2) x 6 x 3
= 9 square inches
Since there are two triangular faces, the total area of the triangular faces is:
Total area of triangular faces = 2 x 9 = 18 square inches
Next, let's find the area of the three rectangular faces. We have two rectangles with sides of 6 inches by 8 inches, and one rectangle with sides of 4 inches by 8 inches. The area of each rectangular face is:
Area of rectangular face = length x width
So the area of the rectangular faces are:
Area of rectangular face 1 = 6 x 8 = 48 square inches
Area of rectangular face 2 = 6 x 8 = 48 square inches
Area of rectangular face 3 = 4 x 8 = 32 square inches
Therefore, the total surface area of the triangular prism is:
Total surface area = 18 + 48 + 48 + 32 = 146 square inches
So the surface area of the given triangular prism with sides of 4in, 5in, 6in, 6in, 8in, and 7in is 146 square inches.
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a shopper buys 4 pounds apples for 4.60 what is the cost in dollars of 1 pound apples
Answer:
1.15 dollars
Step-by-step explanation:
To calculate the cost of 1 pound of apples, we can divide the total cost of 4 pounds of apples by 4.
The total cost of 4 pounds of apples is 4.60 dollars.
So, the cost of 1 pound of apples would be 4.60 / 4 = 1.15 dollars.
The cost in dollars of 1 pound apples is $1.15
What is division?Division is one of the four basic operations of arithmetic, the ways that numbers are combined to make new numbers.
The process of dividing a number up into equal parts, and finding how many equal parts can be made. It is represented by the symbol "÷" or sometimes "/"
Division is breaking a number up into an equal number of parts.
Given that, a shopper buys 4 pounds of apples for 4.60, we need to find the cost in dollars of 1 pound of apples,
To calculate the cost of 1 pound of apples, we can divide the total cost of 4 pounds of apples by 4.
The total cost of 4 pounds of apples is 4.60 dollars.
So, the cost of 1 pound of apples would be 4.60 / 4 = 1.15 dollars.
Hence, the cost in dollars of 1 pound apples is $1.15
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6x6x6x6x6x6x6 devided by 6x6x6x6x6x6 in indext form
The result of 6x6x6x6x6x6x6 divided by 6x6x6x6x6x6 in index form is 6.
In index form, 6x6x6x6x6x6x6 divided by 6x6x6x6x6x6 can be written as:
(6⁷) / (6⁶).To divide two exponential expressions with the same base (in this case, 6), we can subtract the exponents:
6⁽⁷⁻⁶⁾ = 6¹ = 6.
Index form, also known as exponential form, is a way of writing numbers or expressions using exponents. In index form, a number is expressed as a base raised to a power or exponent.
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how do i solve this?
The height of the density curve for the given graph is 1/4.
What is density curve?A density curve is an idealised depiction of a distribution in which the area under the curve is defined to be 1. Although normality is not required, the normal density curve will be the most helpful to us. The "shape" of a distribution, including whether or not it includes one or more "peaks" of often occurring values and whether it is skewed to the left or right, may be determined using a density curve.
For a density curve the area under the curve must be equal to 1.
That is,
base (height) = 1
Here, the base = 4 units
Substituting the value we have:
(4) height = 1
height = 1/4
Hence, the height of the density curve is 1/4.
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