The benchmark fractions are the most common fraction.
Such as 1/2, 0, 3/8 etc.
What is a mixed fraction?Mixed fractions are a type of fraction in which there is a whole number part and a fractional part. for example 17/3 would be 5 2/3 as a mixed fraction
Marcia makes jewelry to sell at the artists' fair. She spends $120 to rent a stall at
the fair for the day and each piece of jewelry costs Marcia $15 in materials.
Which equation would compute the number of pieces of jewelry Marcia must sell at
the artists' fair such that the average cost per piece of jewelry would be $20?
110
The equation that can be used to compute the number of pieces of jewellery is ($120 + $15q)/q = $20 .
What is the equation?
Average cost is total cost divided by the quantity of jewellery sold.
Average cost = total cost / quantity
Total cost is the sum of fixed cost and variable cost.
Total cost = fixed cost + variable cost
The fixed cost is the cost of renting the stall. The variable cost is the cost of the materials.
Total cost = $120 + ($15 x q)
T = $120 + $15q
Average cost = ($120 + $15q)/q = $20
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Ellus
These prisms are similar. Find the surface
area of the larger prism in decimal form.
5 m
7 m
Surface Area
90 m2
Surface Area = [? ] m2
please helppp. :)
If two prisms are similar, their corresponding dimensions are proportional.
Let's assume that the ratio of the corresponding lengths of the smaller prism to the larger prism is k:1, where k is a constant.
Then the ratio of the corresponding surface areas of the smaller prism to the larger prism is [tex](k^2):1[/tex], because the surface area of a prism is proportional to the square of its length.
In this problem, the surface area of the smaller prism is not given.
However, we can find the ratio of the corresponding lengths of the smaller prism to the larger prism using the fact that they are similar.
The height of the smaller prism can be found as follows:
[tex]7/5 = h/L[/tex]
where h is the height of the smaller prism and L is the length of the larger prism.
Solving for h, we get:
[tex]h = (7/5)L[/tex]
The ratio of the corresponding lengths of the smaller prism to the larger prism is 7:5.
The ratio of the surface areas of the smaller prism to the larger prism is:
[tex](7/5)^2 : 1 = 49/25 : 1[/tex]
We know that the surface area of the larger prism is [tex]90 m^2.[/tex]
Let's denote the surface area of the smaller prism by A. Then we can set up an equation:
(49/25)A = 90
Solving for A, we get:
A = (25/49) * 90 = 45/7 ≈ 6.4
The surface area of the smaller prism is approximately [tex]6.4 m^2.[/tex]
(Note: The units of the surface area are not provided for the smaller prism, so I assumed the same units as the larger prism.
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Isabel invests 2000 euros in a bank that offers 4. 3% interests pa compounded biannually. Calculate the value of her investments after 5 years
The value of Isabel's investment after 5 years is 2512.08 euros.
How much will Isabel's investment be worth after 5 years?To calculate the value,
The formula for calculating compound interest is:
A = P (1 + r/n)^(nt)
where:
A = the final amount
P = the principal (initial amount)
r = the annual interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the time (in years)
In this case, we have
P = 2000 euros
r = 0.043 (4.3% as a decimal)
n = 2 (compounded biannually)
t = 5 years
So, the formula becomes:
A = 2000 (1 + 0.043/2)^(2*5) = 2512.08 euros
Therefore, after 5 years, Isabel's investment will be worth 2512.08 euros.
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Write an inequality that represents the cost of each cookie.
At Cindy's Sweet Treats, cookies are packaged in boxes of 8. Depending on the cookie flavor, the most a box can cost is $16
The inequality that represents the cost of each cookie is C ≤ $2, where C is the cost of each cookie.
An inequality is a mathematical expression that shows a relationship between two values that may not be equal. To represent the cost of each cookie using an inequality, we can first determine the cost per cookie by dividing the total cost of a box by the number of cookies in each box. In this case, that would be $16 divided by 8 cookies.
Let C represent the cost of an individual cookie. Since the most a box can cost is $16, the highest cost per cookie would be $16 / 8 = $2. To express this situation as an inequality, we can write:
C ≤ $2
This inequality indicates that the cost of each cookie (C) must be less than or equal to $2, ensuring that the total cost for a box of cookies does not exceed the maximum price of $16. By using this inequality, we can evaluate different cookie flavors and their respective costs to confirm that they meet Cindy's Sweet Treats' pricing requirements.
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Select all the polygons that can be formed by the intersection of a plane and a cylinder, either parallel or perpendicular to the base?
The intersection of a plane and a cylinder can result in the following polygons when the plane is either parallel or perpendicular to the base:
Oa Rectangle
Oc Square
Od Triangle
What are the polygons that can be formedThe angle and position of the plane relative to the cylinder intersect determines a myriad of shapes not limited to just one. Herein are the descriptions for a few that may arise:
Rectangle: If a plane intersects the cylinder but remains parallel to its base, the resulting outline shall be rectangular. This is due to the aforementioned plane cutting through the lateral surface of the circumference, forming two equal lines--thereby shaping a closed loop in an angular fashion.
Square: The intersection of a plane perpendicularly bisecting the base of a cylindrical object will conjure up a square shape congruent to the cylinders. In other words, a perfectly squared compartment matching with the pre-existing edges of the bottom curve of the cylinder.
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Find the radius of the circle with equation x² + y² = 19²
r=0
Submit Answer
The radius of the circle of equation x² + y² = 19² is given as follows:
r = 19 units.
What is the equation of a circle?The equation of a circle of center [tex](x_0, y_0)[/tex] and radius r is given by:
[tex](x - x_0)^2 + (y - y_0)^2 = r^2[/tex]
The radius of a circle represents the distance between the center of the circle and a point on the circumference of the circle.
The equation of the circle in this problem is given as follows:
x² + y² = 19².
Hence the radius is obtained as follows, comparing to the general equation:
r² = 19²
r = 19 units.
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Marina has learned that it typically rains 43% of the days in August in the city where she lives.
Assuming that the probability of rain on each day is independent, find the variance in the number of rainy days in Marina's city in two weeks during the month of August.
Round your answer to three significant figures
The variance in the number of rainy days in Marina's city in two weeks during the month of August is approximately 3.96.
We know that the probability of rain on any given day is0.43, and we want to find the friction in the number of stormy days in two weeks, which is 14 days.
The friction of a binomial distribution is given by the formula
Var( X) = npq
where n is the number of trials,
p is the probability of success on each trial,
and q is the probability of failure on each trial( q = 1- p).
In this case, n = 14,
p = 0.43, and
q = 0.57.
Substituting these values, we get
Var( X) = npq
Var( X) = 14 x0.43 x0.57
Var( X) = 3.9642
Rounding to three significant numbers, we get Var( X) = 3.96
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are 4(5k – 3) and 14k – 8 equivalent
help please
Answer: No they are not
Step-by-step explanation:
Distribute the 4 from the left equation into the parenthesis.
you would get 20k - 12
that is not equivalent to 14k - 8
Plsssssssss answer quick need this NOWWW
Answer:
Step-by-step explanation:
A= 1/2 b h b=6 h=2.5
= 7.5
Answer:
7.5 inches squared
Step-by-step explanation:
If only distances are provided, there are two methods to find the area of a triangle. Which method to use depends on which lengths are provided:
Method 1: Base * Height (one leg and the corresponding height)Method 2: Heron's Formula (all three legs are known)Method 1: Base * Height
For any triangle, a line segment from one vertex that terminates perpendicularly to the leg across from it is considered a "height," and the leg that the "height" intersects is "base". If both quantities are known, then the area of the triangle is base times height divided by 2 (sometimes stated as 1/2 times base times height).
In an equation format: [tex]Area_{triangle}=\frac{1}{2}base*height[/tex], often abbreviated as [tex]A_{triangle}=\frac{1}{2}bh[/tex]
For this example, the base at the bottom "6 in" has a corresponding height of "2.5 in", so
[tex]A_{triangle}=\frac{1}{2}(2.5~\text{in})(6~\text{in})[/tex]
[tex]A_{triangle}=7.5\text{ in}^2[/tex]
Method 2: Heron's Formula
If you are not provided any of the heights, but only the three legs of the triangle, Heron's formula provides a method of finding the area of the triangle. It is significantly more complicated, and should only be used if one doesn't have one of the heights given.
Heron's formula gives the area of a triangle using the following formula:[tex]A=\sqrt{s(s-a)(s-b)(s-c)}[/tex] where a, b, and c, are the side lengths of the triangle, and "s" is the "semi-perimeter" (one half of the perimeter) of the triangle: [tex]s=\dfrac{a+b+c}{2}[/tex]
To be consistent, let's let a=3 in, b=5 in, and c=6 in.
Calculating the semi-perimeter of the given triangle first:
[tex]s=\dfrac{a+b+c}{2}=\dfrac{(3~\text{in})+(5~\text{in})+(6~\text{in})}{2}=\dfrac{14~\text{in}}{2}=7~\text{in}[/tex]
Calculating the area:
[tex]A=\sqrt{s(s-a)(s-b)(s-c)}[/tex]
[tex]A=\sqrt{(7~\text{in})((7~\text{in})-(3~\text{in}))((7~\text{in})-(5~\text{in}))((7~\text{in})-(6~\text{in}))}[/tex]
[tex]A=\sqrt{(7~\text{in})(4~\text{in)(2~\text{in})(1~\text{in})}[/tex]
[tex]A=\sqrt{56~\text{in}^4}[/tex]
[tex]A=7.48331477355...~\text{in}^2[/tex]
[tex]A\approx7.5~\text{in}^2[/tex]
Side note: The 2.5 inches that they gave you in the problem isn't exactly 2.5 inches. They rounded to one decimal place there.
7. You're thinking a lot about Inflation, and you think it might be a good idea to set aside the money to buy a fancy
leather couch for your first home, which you'd like to purchase 10 years after you graduate from high school.
Why does the Inflation calculator not tell you what the inflation adjusted price will be 10 years from now?
Inflation is an important factor to consider when planning future purchases.
The Inflation Calculator does not provide the inflation-adjusted price for a fancy leather couch 10 years from now because it relies on historical data and cannot predict future inflation rates accurately.
Inflation rates are influenced by various economic factors and can fluctuate over time.
Therefore, it's difficult to determine the exact future cost of items with certainty. However, you can use historical trends as a general guide to estimate potential increases in cost due to inflation.
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Find the mean and the mean absolute deviation of each data set
To find the mean and mean absolute deviation of a data set, you need to follow these steps:
1. Find the mean: To find the mean of a data set, add up all of the values in the set and then divide that sum by the number of values in the set. For example, if your data set is {2, 4, 6, 8, 10}, you would add up all of the values (2+4+6+8+10=30) and then divide that sum by the number of values (5). So the mean of this data set is 30/5 = 6.
2. Find the mean absolute deviation:
To find the mean absolute deviation of a data set, you first need to find the absolute deviation of each value in the set from the mean.
To do this, subtract the mean from each value in the set (for example, if your data set is {2, 4, 6, 8, 10} and the mean is 6, you would subtract 6 from each value: 2-6=-4, 4-6=-2, 6-6=0, 8-6=2, 10-6=4).
Then, take the absolute value of each of these differences (|-4|=4, |-2|=2, |0|=0, |2|=2, |4|=4). Finally, find the mean of these absolute deviations by adding them up and dividing by the number of values in the set.
For the example data set above, the mean absolute deviation is (4+2+0+2+4)/5 = 2.4.
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how to find the polynmial closest to another polynomial in an inner product space
To find the polynomial closest to another polynomial in an inner product space, you can follow these steps:
Choose an inner product on the space of polynomials. One common inner product on this space is the L2 inner product, which is defined as:
<f,g> = ∫a^b f(x)g(x) dx,
where a and b are the endpoints of the interval on which the polynomials are defined.
Let P be the space of polynomials of degree at most n, where n is the degree of the polynomial you want to approximate. Let f be the polynomial you want to approximate, and let g be an arbitrary polynomial in P.
Define the error between f and g as e = f - g.
Compute the inner product of e with itself:
<e,e> = ∫[tex]a^b (f(x) - g(x))^2 dx.[/tex]
Minimize this inner product with respect to g. This can be done by setting the derivative of <e,e> with respect to g equal to zero and solving for g.
The polynomial that minimizes the error is the polynomial closest to f in the L2 sense.
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A team of scientists surveyed the trews in a national forest. the scientists counted 3,160 evergreen trees and 840 deciduous trees. what percentage of the trees were evergreen?
The percentage of evergreen trees from the total combination of trees is 79%
The percentage of evergreen trees will be calculated using the formula -
Percentage of evergreen trees = number of evergreen trees/total number of trees × 100
Total number of trees = number of evergreen + deciduous trees
Total trees = 3160 + 840
Total trees = 4000
Percentage of evergreen trees = 3160/4000 × 100
Cancelled common zeroes in numerator and denominator and performing division
Percentage = 79%
Hence, the percentage of evergreen trees is 79%.
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Use the given sample data to find each of the listed values. In your answer, include both numerical answers and an explanation, in complete sentences, for the steps necessary to find the data values. Complete your work in the space provided.
62 52 52 52 64 69 69 76 54 58 61 67 73
Range _____
Q1 _____
Q3 _____
IQR _____
Using the given sample data, the data values are:
Range 24
Q1 52
Q3 69
IQR 17
1. Arrange the data in ascending order:
52, 52, 52, 54, 58, 61, 62, 64, 67, 69, 69, 73, 76
2. Calculate the range (highest value - lowest value):
Range = 76 - 52 = 24
3. Find the first quartile (Q1) - the median of the first half of the data:
Since there are 13 data points, we'll take the median of the first 6 numbers: (52 + 52) / 2 = 52
Q1 = 52
4. Find the third quartile (Q3) - the median of the second half of the data:
We'll take the median of the last 6 numbers: (69 + 69) / 2 = 69
Q3 = 69
5. Calculate the interquartile range (IQR) by subtracting Q1 from Q3:
IQR = Q3 - Q1 = 69 - 52 = 17
So, the requested values are:
Range = 24
Q1 = 52
Q3 = 69
IQR = 17
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Ive been stuck on this one question for a while can someone teach me how to do this?
The value of x is 6 and the perimeter is 52 unints
Calculating the value of x and the perimeterFrom the question, we have the following parameters that can be used in our computation:
The figure
If the lines that appear to be tangent are tangent, then we have the following equation
x + 2 = 8
Evaluate the like terms
x = 6
The perimeter is the sum of the side lengths
So, we have
Perimeter = x + 2 + 8 + 5 + 5 + 9 + 9 + 4 + 4
This gives
Perimeter = 6 + 2 + 8 + 5 + 5 + 9 + 9 + 4 + 4
Evaluate
Perimeter = 52
Hence, the perimeter is 52 unints
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A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the maximum height reached by the rocket, to the nearest tenth of a foot. Y
=
−
16
x
2
+
180
x
+
63
y=−16x 2
+180x+63
The maximum height reached by the rocket is approximately 504.6 feet.
To find the maximum height reached by the rocket, we need to determine the vertex of the parabola represented by the given quadratic equation: y = -16x^2 + 180x + 63.
The x-coordinate of the vertex can be found using the formula x = -b / 2a, where a = -16 and b = 180.
x = -180 / (2 * -16) = 180 / 32 = 5.625
Now, we'll plug the x-coordinate back into the equation to find the y-coordinate (maximum height).
y = -16(5.625)^2 + 180(5.625) + 63
y ≈ 504.6
The maximum height reached by the rocket is approximately 504.6 feet.
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Brian has two cubes.
. The first cube has a volume of 125 cm3.
. The second cube has a volume of 343 cm3.
What is the difference in the area of one face of the second cube and the area of one face of the first cube?
A. 2 cm2
B. 24 cm2
C. 49 cm2
D. 218 cm2
Help asap
If the first cube has a volume of 125 cm³ and the second cube has a volume of 343 cm³, the difference in the area of one face of the second cube and the area of one face of the first cube is 24cm². The answer is B. 24 cm².
To find the difference in the area of one face of each cube, we first need to find the side length of each cube. Since the volume of a cube is equal to the side length cubed (V = s³), we can find the side length by taking the cube root of the volume.
For the first cube:
Volume = 125 cm³
Side length = cube root of 125 = 5 cm
For the second cube:
Volume = 343 cm³
Side length = cube root of 343 = 7 cm
Next, we find the area of one face of each cube. The area of one face of a cube is equal to the side length squared (A = s²).
Area of one face of the first cube:
A1 = 5² = 25 cm²
Area of one face of the second cube:
A2 = 7² = 49 cm²
Finally, find the difference in the area of one face of each cube:
Difference = A2 - A1 = 49 cm² - 25 cm² = 24 cm²
The answer is B. 24 cm².
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Find the equation for the plane through the points Po(-3,- 2,4), Qo(-5, - 1,2), and Ro(1,1,5). C. Using a coefficient of 7 for x, the equation of the plane is (Type an equation.)
The equation for the plane through the points Po(-3,-2,4), Qo(-5,-1,2), and Ro(1,1,5) is:
3x - 3y + 2z - 11 = 0
Using a coefficient of 7 for x, the equation of the plane is:
21x - 3y + 2z - 11 = 0
To find the equation of the plane, we can use the cross product of the vectors formed by the points Qo-Po and Ro-Po.
Let's call the vector formed by Qo-Po "u" and the vector formed by Ro-Po "v". Then, we can find the normal vector to the plane by taking the cross product of "u" and "v":
u = Qo - Po = (-5+3, -1+2, 2-4) = (-2,1,-2)
v = Ro - Po = (1+3, 1+2, 5-4) = (4,3,1)
n = u x v = (1(2) - (-2)(3), (-2)(4) - 1(1), (-2)(3) - 1(4)) = (8,-7,-10)
Now that we have the normal vector to the plane, we can find the equation of the plane by using the point-normal form of the equation of a plane:
n · (P - Po) = 0
where "·" denotes the dot product, P is any point on the plane, and Po is one of the given points on the plane.
Let's use the point Po(-3,-2,4) to find the equation of the plane:
n · (P - Po) = 0
(8,-7,-10) · (x+3, y+2, z-4) = 0
8(x+3) - 7(y+2) - 10(z-4) = 0
8x - 7y - 10z + 11 = 0
So the equation of the plane through the points Po, Qo, and Ro is:
3x - 3y + 2z - 11 = 0
To use a coefficient of 7 for x, we can simply multiply both sides of the equation by 7:
21x - 21y + 14z - 77 = 0
Simplifying, we get:
21x - 3y + 2z - 11 = 0
Therefore, the equation of the plane with a coefficient of 7 for x is 21x - 3y + 2z - 11 = 0.
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If the expressions (3x)² (5x6) is written in aa
axb
form what is the value of a + b?
The value of the expression a+b = 45+8 = 53
Expression calculation.
To write (3x)² (5x⁶) in the form of ax^b, we need to simplify the expressions and multiply the coefficients and the variables separately:
(3x)² (5x⁶) = 9x² × 5x⁶ = 45x^(2+6) = 45x^8
So, the expression (3x)² (5x⁶) can be written as 45x^8 in the form of ax^b, where a=45 and b=8.
Therefore, a+b = 45+8 = 53
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will mark brainlist to the correct person who does the step by step correctly and also the correct answer
A city just opened a new playground for children in the community. An image of the land that the playground is on is shown.
What is the area of the playground?
900 square yards
855 square yards
1,710 square yards
1,305 square yards
Answer:
answer choice C
Step-by-step explanation:
The playground is a rectangle.
To find the area of a rectangle, we use the formula:
Area = Length x Width
The length is 25 yards.
The width is 68 yards.
Plugging these into the area formula:
Area = 25 x 68 = 1,700 square yards
Of the options, the closest choice is:
1,710 square yards
The area is 1,710 square yards.
Larry sold 300 items in his sports memorabilia shop. 5 of the items sold 6 were football items. 20% of the other items sold were baseball items. What percent of the total items sold were baseball items?
Approximately 21.3 percent of the total items sold were baseball items.
Out of the 300 items sold, 5 of them were football items, so the number of non-football items sold is:
300 - 5 = 295
We know that 20% of the non-football items sold were baseball items, so the number of baseball items sold is:
0.20 * 295 = 59
Therefore, the total number of baseball and football items sold is:
59 + 5 = 64
The percentage of total items sold that were baseball items is:
(64 / 300) * 100% = 21.3%
Therefore, approximately 21.3 percent of the total items sold were baseball items.
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What is true about the constant of variation for an inverse variation relationship?
Answer:
it is the product of the independent and dependent variables
Step-by-step explanation:
I took a quiz and got that answer right
The constant of variation for an inverse variation relationship is always a fixed value.
What is a characteristic of the constant of variation in an inverse variation relationship?Inverse variation is a relationship between two variables where an increase in one variable results in a decrease in the other variable, while a decrease in one variable results in an increase in the other variable.
Mathematically, this relationship is expressed as y = k/x, where k is the constant of variation.
The constant of variation represents the ratio of the two variables in the inverse variation relationship. It is a fixed value because it remains the same regardless of the values of the variables.
For example, if y varies inversely with x, and y = 4 when x = 2, then the constant of variation is k = xy = 4(2) = 8. This means that y will always be equal to 8/x in this inverse variation relationship.
Therefore, the constant of variation for an inverse variation relationship is always a fixed value, and it represents the ratio between the two variables in the relationship.
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Sam built a circular fenced-in section for some of his animals. The section has a circumference of 55 meters. What is the approximate area, in square meters, of the section? Use 22/7 for π.
The approximate area of the circular fenced-in section is 950.5 square meters.
The circumference of a circle is given by the formula 2πr, where r is the radius of the circle. We are given that the circumference of the fenced-in section is 55 meters, so we can set up the equation:
2πr = 55
We can solve for r by dividing both sides by 2π:
r = 55/(2π)
We are asked to find the area of the section, which is given by the formula A = πr². Substituting our expression for r, we get:
A = π(55/(2π))²
Simplifying, we get:
A = (55²/4)π
Using the approximation 22/7 for π, we get:
A ≈ (55²/4)(22/7)
A ≈ 950.5
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Type the correct answer in the box.
The given equation, V = 1/3 πr²h, solved for h is:
h = 3V / πr²
Subject of formulae: Solving the equation for hFrom the question, we are to solve the give equation for h
From the given information,
The given equation is
V = 1/3 πr²h
To solve the equation for h, we will isolate h
Solving the equation for h
V = 1/3 πr²h
Multiply both sides of the equation by 3
3 × V = 3 × 1/3 πr²h
3V = πr²h
Divide both sides of the equation by πr²
3V / πr² = πr²h / πr²
3V / πr² = h
This can be written as
h = 3V / πr²
Hence, the equation solved for h is:
h = 3V / πr²
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As Nancy's small insurance agency has grown, the spreadsheets they use to track income and expenses have become increasingly complex. Which feature of an AIS (Accounting Information System) would help Nancy to better manage income and expenses?
The income statement and Accounting Information System, along with the balance sheet and cash flow statement, help you understand your company's financial health.
MIS employs non-financial data, but AIS exclusively uses financial data.
MIS indirectly to other external users.
The income management account is most likely affected by Selling, General, and Administrative Expenses.
In accounting, an instrument that provides the data needed to effectively manage an organization and make decisions is a management information system (MIS).
It is used to locate, collect, process, and distribute economic data about a company to a variety of users (AIS).
MIS concentrates on the financial and accounting aspects of a business, diagnosing problems and proposing solutions. The former management system, that occasionally relied on intuition and unscientific approaches and was arbitrarily constructed, has been replaced with MIS.
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600 is writtena s 2^a x b x c^d
where a , b, c and d are all prime numbers
Find the value of a,b,c and d
Answer:
a = 3
b = 1
c = 5
d = 2
Step-by-step explanation:
To find the prime factorization of 600, we can use trial division by dividing by the smallest prime numbers until we reach a prime factor:
600 ÷ 2 = 300
300 ÷ 2 = 150
150 ÷ 2 = 75
75 ÷ 3 = 25
25 ÷ 5 = 5
Therefore, the prime factorization of 600 is:
600 = 2^3 × 3^1 × 5^2
So, a = 3, b = 1, c = 5, and d = 2.
(a) Determine the critical value(s) for a right-tailed test of a population mean at the
α=0. 10
level of significance with
20
degrees of freedom.
(b) Determine the critical value(s) for a left-tailed test of a population mean at the
α=0. 10
level of significance based on a sample size of
n=15.
(c) Determine the critical value(s) for a two-tailed test of a population mean at the
α=0. 01
level of significance based on a sample size of
n=11
The critical value for a right-tailed test of a population mean at α=0.10 level of significance with 20 degrees of freedom is 1.325.
The critical value for a left-tailed test of a population mean at the α=0.10 level of significance based on a sample size of n=15 is -1.345.
The critical value(s) for a two-tailed test of a population mean at the α=0.01 level of significance based on a sample size of n=11 is -2.718 and 2.718.
To find the critical values, we need to use a t-distribution table or a statistical software that provides the critical t-values for a specific level of significance and degrees of freedom.
For part (a), since it's a right-tailed test, the critical value will be positive, and we need to look for the t-value that corresponds to an area of 0.10 to the right of the mean in the t-distribution table. With 20 degrees of freedom, the critical value is 1.325.
For part (b), since it's a left-tailed test, the critical value will be negative, and we need to look for the t-value that corresponds to an area of 0.10 to the left of the mean in the t-distribution table. With 15 degrees of freedom, the critical value is -1.345.
For part (c), since it's a two-tailed test, we need to split the significance level equally between the two tails. We need to find the t-values that correspond to an area of 0.005 to the left of the mean and 0.005 to the right of the mean in the t-distribution table. With 11 degrees of freedom, the critical values are -2.718 and 2.718.
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Jim walks 3 miles per hour slower than his friend Steve runs. Steve runs 4 miles per hour slower than his friend Matt rides his bike. Jim walks 25 miles in the same time Matt rides his bike miles. Steve runs 16 miles in the same time Matt rides his bike 24 miles.
Part A: Write an equation to calculate Jim's speed
Let's start by assigning variables to the unknowns in the problem:
- Let j be Jim's speed in miles per hour (in other words, the rate at which he walks).
- Let s be Steve's speed in miles per hour (in other words, the rate at which he runs).
- Let m be Matt's speed on his bike in miles per hour.
From the first sentence of the problem, we know that:
s = m + 4 (Steve runs 4 miles per hour slower than Matt rides his bike)
And from the second sentence, we know that:
j = s - 3 (Jim walks 3 miles per hour slower than Steve runs)
We want to find out how long it takes Jim to walk 25 miles and how long it takes Matt to ride his bike x miles. We can use the formula:
time = distance / rate
For Jim, we have:
time = 25 / j
For Matt, we have:
time = x / m
We also know that Steve runs 16 miles in the same time that Matt rides his bike 24 miles, so we can write:
16 / s = 24 / m
Substituting s = m + 4 and solving for m, we get:
16 / (m + 4) = 24 / m
16m = 24(m + 4)
16m = 24m + 96
8m = 96
m = 12
So Matt rides his bike at a speed of 12 miles per hour.
Now we can use the equations we set up earlier to solve for j and x:
j = s - 3
s = m + 4
j = (m + 4) - 3
j = m + 1
j = 13
x / m = 25 / j
x / 12 = 25 / 13
x = (25 * 12) / 13
x = 300 / 13
x ≈ 23.08
So it takes Jim 25 / 13 ≈ 1.92 hours to walk 25 miles, and it takes Matt 23.08 hours to ride his bike x = 300 / 13 ≈ 23.08 miles.
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MarÃa is shopping for party supplies. She finds that paper plates come in packages of 8, napkins come in packages of 10, and paper cups come in packages of 12. What is the least number of packages of plates, napkins, and cups she has to buy so that she has the same number of each item for her party?
The least number of packages of plates, napkins, and cups Maria has to buy is 15 packages .
To find the least number of packages, we need to find the least common multiple (LCM) of the three package sizes: 8 (plates), 10 (napkins), and 12 (cups).
The prime factors of 8 are 2x2x2, of 10 are 2x5, and of 12 are 2x2x3. To find the LCM, we multiply the highest powers of each prime factor: 2³x3x5 = 120.
This means Maria needs 120 of each item. She will buy 120/8 = 15 packages of plates, 120/10 = 12 packages of napkins, and 120/12 = 10 packages of cups.
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Please answer the question correctly and neatly. Will upvote if
correct.
Using a Table of Integrals with the appropriate substitution, find e3r + 6e2x + 7e et - 64 peste da Answer: ] +0
The equation provided, "e3r + 6e2x + 7e et - 64 pestle da," is not an integral expression and does not have a variable of integration.
Additionally, the requested answer, "] +0," does not make sense in the context of the question. Please provide a complete and accurate question for me to assist you with. Hi! Based on your terms provided ("Integrals", "substitution", and "find"), I understand that you are looking to solve an integral using substitution. However, the integral you provided appears to have some typographical errors. Please provide the correct integral, and I'll be happy to help you solve it.
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