The required sample size when its 95% error margin is 0.03 with 385 samples.
Sample Size RequiredTo estimate the proportion of people who want to purchase tablet PCs that cost more than $700 with a 95% confidence level and an error margin of 0.03, you can use the formula for sample size:
n = (z² * p * (1-p)) / E²
where:
n is the sample sizez is the standard normal deviate (1.96 for a 95% confidence level)p is the proportion of people who want to purchase tablet PCs that cost more than $700 (unknown)E is the error margin (0.03)Since we don't know the proportion of people who want to purchase tablet PCs that cost more than $700, you can use a reasonable estimate or a conservative estimate (e.g., 0.50) in the formula.
n = (1.96² * 0.50 * (1 - 0.50)) / (0.03²)
n = 384.16
The sample size required is 385.
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solve the equation:(x+5)^4 = 81
Answer:4√81=±3
Step-by-step explanation:
If (x+5)^4 = 81,
then (x+5)^2 = ± sqrt(81), so
(x+5)^2 = ±9
Focusing on (x+5)^2 = 9 for the two real roots, we have
(x+5)^2 = 9
x+5 = ± sqrt(9)
x+5 = ± 3
x+5 = 3 gives you x = -2
x+5 = -3 gives you x = -8
There are two complex roots too, but I'm not sure if you're studying that too. If so, then you'd solve (x+5)^2 = -9:
x+5 = ± sqrt(-9)
x+5 = ±3i
x = 5 ± 3i as the two complex roots.
J and M are base angles of trapezoid JKLM. If measure J is 4x+1 and measure M is 12x-95, find measure K and show your work!
Since J and M are base angles of trapezoid JKLM, the measure of k is 168°.
What is an isosceles trapezoid?The base angles of an isosceles trapezoid are congruent and equal. This ultimately implies that, an isosceles trapezoid has base angles that are always equal in magnitude.
By equating the given base measures of isosceles trapezoid JKLM, we can determine the specific value of x and angle k as follows;
m∠J = m∠M
4x + 1 = 12x - 95
By re-arranging and collecting like terms, we have the following:
12x - 4x = 95 + 1
8x = 96
By dividing both sides of the equation by 8, we have the following:
x = 96/8
x = 12.
Therefore, the measure of k is given by:
m∠k = 180 - 12
m∠k = 168°.
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Please help me, I need the inequality only
The solution of the inequality is x < 60 and graph is shown in the image attached
How to solve and graph an inequality?An inequality compares two values, showing if one is less than, greater than, or simply not equal to another value e.g. 5 < 6, x ≥ 2, etc.
Let x represent the number of days.
Since 25 tables is being shipped daily and we want to find how many days will there be fewer than 1500 tables, we can write:
25x < 1500
x < 1500/25
x < 60
Note: fewer than means less than i.e. <
The graph is shown in the image attached
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I got 2 different answers. 1 or 100% and also 0.2962... can i please get clarification on which of these i did is correct?
The probability that the first item is not the first to be delivered is 0.6667
How to determine the probabilityRepresent the events that the first, second, and third items arrive on the first day of February A, B, and C, respectively.
The probability that the first item arrives is 1/3.The probability that the second item arrives is 1/3,The probability that the third item arrives is 0.So, the probability that one of the other two items arrives first is
1/3 + 1/3 = 2/3.
The probability that the first item is not the first to be delivered is
1 - 2/3 = 1/3
Evaluate
1 - 2/3 = 0.6667
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A transformation is applied to a figure to create a new figure. Which transformation does not preserve congruence?
When a transformation is applied to a figure to create a new figure then Dilation do not preserve congruence but do preserve orientations.
Rotations, reflections, translations, and dilation are only a few of the many transformations. Dilation do not preserve congruence but do preserve orientations. Rotations, reflections, and translations all preserve congruence and are referred to as isometries.
Maintaining congruence refers to a transformation where the side lengths and angle measurements of the Image and Pre-Image are the same.
An object's orientation refers to how its related parts are ordered. As long as the components of an item remain in the same sequence, rotation and translation retain orientation. Orientation is not maintained by reflection.
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Someone please help! I'm in Algebra 1 and this is supposed to be a puzzle.
a^x a^y = a^88 x and y differs by 32
The solution of the system is x = 60 and y = 28.
What is the system of equations?One or many equations having the same number of unknowns that can be solved simultaneously called as simultaneous equation. And simultaneous equation is the system of equation.
Given:
An algebraic equation,
[tex]a^{x} a^{y} = a^{88}[/tex]
When the base value is the same, we can add the exponents.
x + y = 88
And x - y = 32
Now, we have the system of equations,
Adding both the equations,
2x = 120
x = 60
And y = 28.
Therefore, the values are x = 60 and y = 28.
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How much material would be required to make one triangular sail for a sailboat if the base is 420 centimetres and the altitude is 653 centimetres?
Answer:
Step-by-step explanation:
I don't know I'm just asking the question
In a grade 7 class,There are 30 students in a class 18 of them own at least one pet.What percent of them have pets.Answer is 60 percent but how do i do the work.NEED URGENT RESPONSE
Answer: Use cross product property
Step-by-step explanation:
I solved it out for you below! I hope it helps! If you need a better explanation maybe ask your teacher? :)
A cylindrical candle is sold in a gift box
that is a square-based prism. What is
the volume of empty space in the box?
Radius 8 cm
Height 16 cm
The volume of empty space in the box will be 220cm³
The diameter of the candle is equal to the width of the box (the length of the side of the square base of the box), and the height of the box is equal to the height of the candle, assuming that the candle fits tightly inside the box without wasting any room.
You may compute the prism's volume by multiplying it by the square base's area (height).
The area of the circular base can be used to compute the volume of the candle's cylinder (height).
The square box base's side measures 8 cm long, hence its area is equal to that measurement= 8cm²=64cm²
The candle's diameter is two times its radius, hence the radius is 8cm/2=4cm
area of the circular base thus Equals (A = π r²).
=πx4²
=16π²
Since the height of the candle and of the box is 16cm, the difference in volume is 1024-256π
=220cm³
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2. Your boss has decided to make room for new models of digital cameras by discounting old models. In order to sell them quickly, she wants to sell them at the store’s original cost before markup. She asks you to change the price tags and make signs with the percent of discount. Knowing that the stores’ percent of markup on digital cameras in 40%, and the original price of a camera is $175.50. What was the store's original cost on this camera?
Knowing that digital camera merchants typically mark up their products by 40%, even when a camera's actual cost is $175.50 The price of one rupee is $438.75.
What does cost price mean in math?Your boss has chosen to give old models of digital cameras a discount in order to make place for new ones. She wants to offer them for sale at the store's original price, without a markup, in order to move them quickly. You are requested by her to alter the price tags and create signage indicating the percentage of the reduction. A digital camera costs $175.50 at the manufacturer's suggested retail price, with shops adding 40% to that figure.
cost = ($175.50 / 40 ) × 100 = $438.75
In mathematics, the cost price formula, often known as C.P., is used to determine an object's exact price.The price that a buyer pays for a good, service, or commodity, according to the definition of C. P.In the estimation of profit and loss calculations for a specific purchase, it is frequently utilized.
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How do you eliminate the parameter to find a cartesian equation of the curve?
A horizontal parabola with a right-facing opening and a vertex at (1,1) is we have positive direction.
In order to make the coefficients of either the variable x or the variable y numerically equal, first multiply both of the following equations by any suitable non-zero constants.
Finding the single equation of a curve in standard form with only the variables xs and ys constitutes the cartesian equation of that curve. You must simultaneously solve the parametric equations in order to arrive to this equation.
X and Y both
are t-related functions.
We have t=y1 after solving y=t+1 to get t as a function of y.
Thus, given x=t2+1, we have x=(y1)2+1x1=(y1) by substituting t=(y1).
A horizontal parabola with a right-facing opening and a vertex at (1,1) is what we have positive direction.
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To indirectly measure the distance across a river, Fatoumata stands on one side of the river and uses sight-lines to a landmark on the opposite bank. Fatoumata draws the diagram below to show the lengths and angles that she measured. Find PR, the distance across the river. Round your answer to the nearest foot.
The distance PR across the river is 177 feet
How to determine the distance PRThe complete question is added as an attachment
From the question, we have the following parameters that can be used in our computation:
The equivalent ratio represented as
PR : 125 = PR + 170 : 245
Express the ratio as a fraction
So, we have the following representation
PR/125 = (PR + 170)/245
Cross multiply
This gives
245PR = 125PR + 21250
Evaluate the like terms
120PR = 21250
Divide both sides by 120
PR = 177
Hence, the distance is 177 feet
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A lighthouse 1 flaahes its light every 15 minutes. A lighthiuse 2 flaahes every 18 minutes. If the two lighthouse flaah togethwr at 1:00 A. M, what time they will next flash together
The next time they will flash together will be at 4:00 AM.If they flash together at 1:00 AM.
According to the given information we are trying to find the smallest time interval at which both the lighthouses will flash together.The first lighthouse flashes every 15 minutes, and the second lighthouse flashes every 18 minutes.
To find the LCM of 15 and 18, we can list out the multiples of each number and find the smallest multiple that is common to both.
Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, ...
Multiples of 18: 18, 36, 54, 72, 90, 108, 126, 144, ...
As we can see, the smallest multiple that is common to both lists is 90. This means that the two lighthouses will flash together every 90 minutes.Since they both flash at 1:00 AM, we can add 90 minutes to 1:00 AM to find the next time they will flash together:
1:00 AM + 90 minutes = 4:00 AM
So, the next time they will flash together will be at 4:00 AM.
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a coin with a head on one side and a tail on the other is tossed, followed by a six sided die with faces marked 1 through 6 being rolled. if each outcome is equally likely, what is the probability of each outcome?
can i please receive an explanation
how to find the y intercept of a polynomial function
To find the y intercept of a polynomial function solve the function for the input value of zero.
We know that a polynomial function is a function that contains only positive integer exponents of a variable.
The highest power of a polynomial function is the degree of polynomial function.
A polynomial is generally represented as P(x).
The domain of a polynomial function is entire real numbers (R).
We know that the y-intercept is the value of the function for which the function has an input value of zero.
To find the y intercept of a polynomial function P(x) we substitute x = 0 and solve the polynomial function.
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four players pick a real number from [0,1]. the players with the middle two numbers are paired together, while the players with the two extreme numbers are paired together. the pair with a lower sum has to each pay the difference to the pair with a higher sum. if you are allowed to choose your number (while everyone else draws uniformly at random), which number should you choose?
If the four players choose their numbers independently and uniformly at random from [0,1], then the expected value of the sum of the two middle numbers is 1/2, and the expected value of the sum of the two extreme numbers is 1/2. Therefore, in order to minimize the expected
One of the most straightforward methods for gathering information from the entire population is random sampling. Every member of the subset has an equal chance of being chosen as part of the sampling process when using random sampling. For instance, if an organization employs 300 people overall, a sample group of 30 workers will be chosen to participate in the survey. In this instance, the population is the entire workforce of the organization, and the sample is 30 employees. Since all of the employees who were picked to participate in the survey were chosen at random, every worker has an equal chance of getting chosen.
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a square is cut out of a circle whose diameter is approximately feet. what is the approximate area (shaded region) of the remaining portion of the circle in square feet? ( where )
The approximate area (shaded region) of the remaining portion of the circle in square feet is 55.94 ft².
We know that,
the side of square=2*[r*√2/2]=r*√2 that is being taken out.
diameter = 14 ft and radius , r = 7 ft.
the side of square=7*√2=9.89 ft
[area of the remaining portion of the circle]=[ area of a circle]-[area of a square]
[area of a square] = (7√2)²=98 ft²
[ area of a circle] = π*r²= π x 7^2 = 153.94 ft²
therefore,
[area of the remaining portion of the circle]=153.94 - 98=55.94 ft²
the answer is 55.94 ft².
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The Students Athletes Club has a monthly budget ofxdollars. Every month $500 is spent on transportation. One-fourth the remaining budget is spent on monthly activities. Which function can be used to find the amount in dollars spent on monthly activities?
The function to find the amount in dollars spent on monthly activities can be represented as: A(x) = (x - 500) * 1/4
Let x be the total monthly budget in dollars and A(x) be the function of x that determines the amount in dollars spent on monthly activities.
To find the value of A(x), we follow the steps:
First, we subtract the fixed monthly transportation cost of $500 from the total budget.
The remaining budget is then divided by 4 to find the amount spent on monthly activities.
Therefore, the function A(x) can be written as: A(x)= (x-500)/4
Thus, the function (x - 500) * 1/4 can be used to find the amount in dollars spent on monthly activities.
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John is starting a roofing business. He will need to buy a truck and some supplies to get his business going. The truck costs $13000 used. He gets three jobs right away. And hires 2 workers to help him. The materials for all three jobs cost $3000 total. The jobs will each take a week not including Saturday and Sunday and he pays his workers $125 per day per worker. How much will he have to charge for each job in order to break even at the end of the third job?
As per the unitary method, the charge for each job in order to break even at the end of the third job is $3,000
In math the term unitary method is known as a single unit and then multiply the value of a single unit to the number of units to get the necessary value.
Here we have given that John is starting a roofing business. He will need to buy a truck and some supplies to get his business going.
And here we we have also known as the truck costs $13000 used.
The value of truck is 13000 and material for all 3 jobs is 3000
Here we have also know that each job takes 5 days for a total of 15 days
workers get paid 125 dollars a day.
As we all know that each worker gets 125 a day.
Then here we have also know that each job requires 5 days so he pays each worker 625 per job.
Then he has them work on 3 jobs, and then he pays each worker 1875 for all 3 jobs.
Where here he has 2 workers so he pays out 3750 in total to the workers for all 3 jobs.
Then the total cost is calculated as,
=> $13,000 for the truck
=> $3,000 for the material
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Dirt being hauled by two trucks to a construction site is modeled by the expression xS+yRS+R. Truck 1 can haul x cubic yards and truck 2 can haul y cubic yards. Truck 1 makes S trips to the construction site, while truck 2 makes R trips. Which TWO statements are correct?
S + R represents the total trips done by these trucks.
What is volume?Volume is defined as the amount of space occupied by an object that is bound by a boundary. It must be noted that the volume is a mathematical term that is only applicable to 3D (three-dimensional) objects or spaces. As such, the units commonly used for volume are cubic units, that is, m3, cm3, in3, etc.
Two dump trucks hauling rock to a construction site is given by the expression. xS + yR
S +R
Truck 1 can haul x cubic yards
Truck 2 can haul y cubic yards.
Truck 1 makes P trips to the construction site, while truck 2 makes R trips.
Hence the trips made by truck 1 and truck 2 should be the addition of the trips made by the trucks individually.
So the total trips is represented by S + R
Therefore, S + R represents the total trips done by these trucks.
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DE is
midsegment of AABC. Find the value of x
B
X
The value of x in the triangle is 8 units.
How to find the mid segment of a triangle?The midsegment of a triangle is a line connecting the midpoints between two sides of a triangle.
It is parallel to the third side and it is half the length of the third side.
Therefore, DE is the mid segment of the triangle ABC. The value of x can be found as follows:
Using the mid segment rule,
BE = EC
BD = DA
Therefore,
x = 8 units
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Solve for x and the missing angles in the diagram below: x = The missing angles are °, ° and °.
The measure of {x} equals to 8 and ∠WYZ is 32°.
What is a radian?The radian is the unit of angle in the International System of Units and is the standard unit of angular measure used in many areas of mathematics
Given is the figure as shown in the image.
It is given that ∠XYZ = 106°. We can write -
∠XYZ = ∠XYW + ∠WYZ
106 = 70 + 5x - 4
5x + 66 = 106
5x = 40
x = 8
∠WYZ = 5x - 8 = 5 x 8 - 8 = 32°.
Therefore, the measure of {x} equals to 8 and ∠WYZ is 32°.
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A turtle traveled 1/10 miles in 1/2 hour. What was the turtles rate in miles per hour?
Answer: 0.2m/h
Step-by-step explanation: We can say when the turtle travels 1/10 of a mile in 1/2 of an hour, he's traveled 0.1 miles in 30 minutes.
If you're looking for the turtle's rate in miles per hour, just double both the time and the distance traveled.
You will end up with 0.2 miles per hour or 2/10 of a mile per hour.
Can y’all help me please on question 7-8 plssss I beg y’all homework’s due tommorow
The solution to the fractions are;
7. 5/6
8. 6/5
What is a fraction?A fraction can be described as the part of a whole variable, number or element.
There are several types of fractions, which includes;
Proper fractionsMixed fractionsImproper fractionsSimple fractionsComplex fractionsFrom the information given, we have that;
1 1/3 × 5/12
convert to improper fraction
4/3 × 5/12
Multiply the values
5/6
(7/10 + 1/5) ÷ ( 6/4 - 3/4)
find the lowest common denominators
( 7 + 2 /10) ÷ (6 - 3 /4)
subtract or add the numerators
9/10 ÷ 3/4
take inverse of the divisor and multiply
9/10 × 4/3
6/5
Hence, the values are 5/6 and 6/5 respectively.
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In a certain city, each block is about 275
meters long. If the post office is 13 blocks
away from the library, approximately how
many miles is it from the post office to the
library? Round your answer to the nearest
tenth. Step-by-step
If the post office is 13 blocks away from the library and each block is 275 meters, approximately, the distance from the post office to the library, in miles, is 2.2 miles.
How is the distance or number of miles determined?To determine the distance or the number of miles from the post office to the library, we use unit conversions and mathematical operations (multiplication and division).
Using multiplication, the number of blocks is converted to meters.
The distance is converted from meters to miles by division.
The distance of a block in the city = 275 meters
The number of blocks from the library to the post office = 13 blocks
The distance from the post office to the library = 3,575 meters (13 x 275)
1,609.34 Meters = 1 Miles
The distance in miles from the post office to the library = 2.2 miles (3,575/1,609.34)
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Which of the following is a statistical question that can result in numerical data?
A. How many miles do you ride your bike each week?
B. How many miles do the students in your class run each week?
C. Who is the dentist at Uptown Dentistry?
D. How many pets do your grandparents have?
The option that is a statistical question is how many miles do the students in your class run each week? (option b)
What is a statistical question?A statistical question is a question that can be answered by collecting data that have varying values.
For example, the number of miles that the students in your class run each week is statistical question because each student would run. This is because data would be collected from more than one student and the students would have varying miles that they run.
The number of pets your grandparents have is not a statistical questions because they can only have a set number of pets.
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Answer:
B. How many miles do the students in your class run each
Step-by-step explanation:
There are 24 baseball cards In 4 packs complete the table to find the rate that gives the number of cards in 2 packs. Write this rate in three different ways.
2 packs include 12 baseball cards, and there are 6 baseball cards per pack.
What is ratio?The ratio can be defined as the number that can be used to represent one quantity as a percentage of another. Only when the two numbers in a ratio have the same unit can they be compared. Ratios are used to compare two objects.
given, There are 24 baseball cards In 4 packs complete the table to find the rate that gives the number of cards in 2 packs.
Since
There are baseball cards in 4 packs = 24
Thus,
Baseball cards in 1 pack = 24 / 4
Baseball cards in a pack = 6
Baseball cards in 2 packs = 12
therefore, there are 12 baseball cards in 2 packs also the rate of baseball cards per pack is 6.
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Complete question:
This figure consists of two squares. The length of each side is a whole number of feet. The combined area of the squares is 100 feet. What is the perimeter of the entire figure in inches?
The perimeter of the entire figure is 40 inches
How to determine the perimeter of the figureIt is important to note that the formula for area of a figure is expressed as;
A = a²
Where;
A is the area of the squarea is the length of side of the squareThe total area is 100 feetA + A = 100
a² = 100
Take the square root of both sides
a = √100
a = 10 inches
The formula for calculating the perimeter of a square is expressed as;
Perimeter = 4a
Substitute the value of a, we have;
Perimeter = 4(10)
expand the bracket
Perimeter = 40 Inches
Hence, the perimeter is 40 Inches
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(8.6 x 10-7) - (4.3 x 10-7)
Answer: 43
Step-by-step explanation:
Multiply 8.6 and 10 then subtract 7 then you do 4.3 times 10 then you subtract then subtract the values you get
What is the length of the unknown side on the following right triangle?
Answer: c=√202
Step-by-step explanation:
c = √(9² + 11²)
which also simplifies to 23.769729
I hope this helps!
Answer:
Step-by-step explanation: