The margin of error at 90% confidence and its interpretation is 0.085. 90% confident that the true proportion of sophomores who will attend Homecoming is within 0.085 of the sample proportion.
The margin of error is defined as a term used in statistics to find the confidence interval. It is denoted by E.
Given, random sample of 92 .
The formula for margin of error is;
[tex]E = z(\sqrt{(p(1 - p)/n} )[/tex]
The parameters are given as;
Sample size; n = 92
Sample of success; x = 51
Sample proportion:
p = 51/92
= 0.554
z at 90% CL = 1.645
Thus;
[tex]E = 1.645(\sqrt{(0.554(1 - 0.554)/92} )[/tex]
[tex]E = 0.085[/tex]
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a charity organization had to sell 18 tickets to their fundraiser just to cover necessary production costs. they sold each ticket for $45. let y represent the net profit (in dollars) when they have sold x tickets.
The equation which represents the net profit of the charity organization is y = 45x-810.
profit in math is described as the quantity gained from any commercial activity. due to the fact each ticket costs $45, the range of tickets bought ought to be accelerated by the fee of one ticket. because the question stated that x tickets had been sold, the amount could be $45 accelerated by x, which is $45x. To calculate the income, we ought to first calculate the cost of 18 tickets, which gives us the value charge, after which subtract it from the selling charge ($45x).The cost of 18 tickets is 18 x $45 = $810.profit = $45x-810y = 45x-810To learn more about profit, visit :
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Twice the sum of a number and 4 is equal to three times the difference of the number and 4. Find the number.
Answer:
The number will be x
Step-by-step explanation:
2(x + 4) = 3(x - 2)
2x + 8 = 3x - 6
14 = x
let f left parenthesis x right parenthesis equals x cubed minus x squared minus 1and x subscript 0 equals 1. to the nearest three decimal places, find x subscript 5using newton's method of approximation.
x(5) is approximately equal to 1.466.
Newton's method, additionally referred to as the Newton-Raphson method, is enormous due to the fact it's far an iterative approach which could appropriately estimate answers to equations. And it's a way for estimating numerical answers (inclusive of x-intercepts, zeros, or roots) to equations which can be too difficult to solve by means of hand.The aim is initially an preliminary guess this is extraordinarily near the real root (answer) after which utilise the tangent line to locate any other x-intercept that is even better than our first wager.An approximation is anything this is supposed to be comparable but not precisely equal to anything else.To learn more about approximation, visit :
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5x+3 is greater than or equal to x-9
The solution to the mathematical statement 5x+3 is greater than or equal to x-9 is x >= -3
How to determine the inequality solution?The statement is given as:
5x+3 is greater than or equal to x-9
Express as an inequality
5x + 3 >= x - 9
Collect the like terms
5x - x >= -9 - 3
Evaluate the like terms
4x > = -12
Divide both sides by 4
x >= -3
Hence, the solution to the mathematical statement 5x+3 is greater than or equal to x-9 is x >= -3
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What is the value of x in this figure? Enter your answer in the box. hexagon
show that cos 30 + 2 tan 60 can be written in the form k where k is an integer
Answer:
k = 4.33
Step-by-step explanation:
Cos 30 = 0.8660
Tan 60 = 1.732
2 Tan 60 = 2 (Tan 60)
2 Tan 60 = 2 (1.732)
2 Tan 60 = 3.464
Cos 30 + Tan 60 = 0.8660 + 3.464 = 4.33
k = 4.33
6) the circular base of a hemisphere of radius 2 rests on the base of a square pyramid of height 6. the hemisphere is tangent to the other four faces of the pyram
The length of the square base is thus [tex]2 x 3\sqrt{2}/2 = 3\sqrt{2}[/tex] = A
What is hemisphere?
Consequently, a hemisphere is a 3D geometric object that is made up of half of a sphere, with one side being flat and the other being a bowl-like shape. It is created by precisely cutting a spherical along its diameter, leaving behind two identical hemispheres.
EXPLANATION; Let ABCDE be the pyramid with ABCD as the square base. Let O and M be the center of square ABCD and the midpoint of side AB respectively. Lastly, let the hemisphere be tangent to the triangular face ABE at P.
Notice that triangle EOM has a right angle at O. Since the hemisphere is tangent to the triangular face ABE at P, angle EPO is also 90 degree. Hence, triangle EOM is similar to triangle EPO.
OM/2 = 6/EP
OM = 6/EP x 2
OM = [tex]6\sqrt{6^2 - 2^2} x 2 = 3\sqrt{2}/2}[/tex]
The length of the square base is thus [tex]2 x 3\sqrt{2}/2 = 3\sqrt{2}[/tex] = A
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q(x)=-2x-3
r(x)=-x+2
find the value of q(r(5))
Answer: q(r(5))= 3
Step-by-step explanation: sub in 5 for x in r(x). Once you do that, you'll get -3 for r(5). Now sub in the value of r(5), -3, for x in q(x). Then you'll end up with -9 once the equation has been evaluated.
I'm really confused by this; can someone help me?
Write the biconditional statement using the information given in the statement below.
"If a shape is an octagon, then it has 8 sides"
Which additional fact is needed to prove by Side-Angle-Side (SAS)?
The information is no complete yet. The additional fact that is needed to prove that both triangles are congruent by SAS is: AD ≅ CD.
How to Apply the Side-Angle-Side (SAS)?The Side-Angle-Side (SAS) is a triangle congruence theorem that is used to prove that two triangles are congruent to each other if they have two pairs of corresponding congruent sides and a pair of included congruent angles.
The diagram given gives us the following information:
A pair of congruent sides - BD ≅ BD
A pair of congruent angles - <ADB ≅ CDB.
Thus, the information is no complete yet. The additional fact that is needed to prove that both triangles are congruent by SAS is: AD ≅ CD.
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PLEASE HELP
find the value of x
Answer: an acute angle so it bout 55
Step-by-step explanation:
write an equivalent expression for 2*14 / 2*2
Answer:
Step-by-step explanation:
if * means multiplication
the equivalent expression will be :
[tex]\frac{2.14}{2.2} = \frac{7}{7} = 7[/tex]
If the * means power :
then equivalent expression will be
[tex]\frac{2^{14} }{2^{2} } = 2^{(14-2)} =2^{12}[/tex]
Calculate the volume of this regular solid.
Intro
8 cm
What is the volume of
TL
Round at the end to the nearest tenth.
cm³
Done
The volume of the sphere is 2144.7cm³.
Given that a sphere with radius 8 cm.
As we all know that the volume of sphere is 4/3πr³.
We will find the volume of sphere by substituting the value of radius in the formula, we get
Volume=4/3 πr³
Now, we will substitute r=8 cm in above formula, we get
V=(4/3)π(8 cm)³
V=(4/3)π(512)cm³
Now, we will simplify this by multiply by 4, we get
V=(2048/3)πcm³
Now, we will simplify it by dividing it with 3, we get
V=682.66π cm³.
As we know, the value of π is 3.14.
So, we will substitute this value and simplify it, we get
V=682.66×3.14
V=2144.66 cm³
Hence, the volume of the sphere when the radius is 8cm is 2144.7 cm³.
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How is FE₂ different from FE2O3?
Please someone help me, anyone?!!
Answer:
Fe2 is elemental iron and Fe2O3 is a compound
Answer:
Step-by-step explanation:
Fe2 is elemental iron and Fe2O3 is a compound of iron and oxygen.
Question 3 (3 points) Determine the smallest integer that makes 4x - 9 - 2x < 5x + 1 true
a 4
b 3
c 2
d 1
Answer:
d:1
Step-by-step explanation:
the answers will always be negative and the other side will always be positive
a national survey conducted among a simple random sample of 1,507 adults shows that 56% of americans think the civil war is still relevant to american politics and political life.
a)
[tex]z=4.658\\p_v=P(z > 4.65)=1-P(z < 4.65)=1.581x*10^{-6}[/tex]
b) By assuming a significance level of α = 0.05 and observing that [tex]p_v[/tex] > α, we can reject the null hypothesis at this level of significance. And in this instance, it makes sense that more than 50% of Americans believe that the Civil War still has an impact on American politics and political life.
c) The confidence interval at 90% would be shown (0.527;0.593).
About 54% to 59% of all Americans, in our opinion, believe that the Civil War is still significant today.
What is a survey?A survey is a set of questions used in human subject research with the goal of gathering specific information from a certain population. Surveys can be carried out via the phone, by mail, online, at street corners, and even in shopping centers.
a)
1) The presented data and the notation "n=1507" refer to the random sample of Americans, "X" denoting the proportion of those Americans in the sample who believe that the Civil War is still significant to American politics and political life, and "p cap" denoting the estimated number of those Americans.
Since the problem specifies that majority α=0.05 represents the significance threshold, [tex]p_0[/tex] is the number that we wish to test (no given, but is assumed)
Z would stand for the statistic (interesting variable), and [tex]p_v[/tex] for the p value (variable of interest)
P is the percentage of the public that believes that the Civil War still has an impact on American politics and political life.
2) Useful concepts and formulas
The allegation that more Americans than 50% believe the Civil War is still significant to American politics and political life needs to be tested through a hypothesis (Majority). :
Alternative Hypothesis: p[tex]\geq[/tex] 0.5
Null Hypothesis: p[tex]\leq[/tex] 0.5
The proportion is thought to have a normal distribution.
This test for the percentage of union membership has one tail higher.
Verify whether the sample conforms to the presumptions required for the test to be applied.
a) The random sample must be representative; in this situation, there is no mention of this issue, but it is safe to presume that it exists.
b) The sample size must be sufficient.
[tex]np_0=1507*0.5=753.5 > 10\\n(1-p_0)=1507*(1-0.5)=753.5 > 10[/tex]
3. Determine the statistic.
The formula used to calculate the statistic is as follows:
[tex]z=\frac{p-p_0}{\sqrt{\frac{p_0(1-p_0)}{n} } }= \frac{0.56-0.5}{\sqrt{\frac{0.5(1-0.5)}{1507} } }=4.658[/tex]
P value= [tex]p_v=P(z > 4.65)=1-P(z < 4.65)=1.581*x*10^{-6}[/tex]
According to the alternative hypothesis, the following would be the p value:
P value= [tex]p_v=P(z > 4.65)=1-P(z < 4.65)=1.581*x*10^{-6}[/tex]
Using this formula, the confidence interval would be determined.
p ± [tex]z_{\frac{\alpha }{2}}\sqrt{\frac{p(1-p)}{n} }[/tex]
With the value of [tex]\alpha[/tex] and [tex]\alpha _2[/tex], we can get the quantile necessary for the interval in the normal standard distribution for the 90% confidence interval.
[tex]z_{\frac{\alpha }{2} }=2.58[/tex]
adding the following to the formula for the confidence interval:
[tex]0.56-2.58\sqrt{\frac{0.56(1-0.56)}{1507} } = 0.527\\0.56+2.58\sqrt{\frac{0.56(1-0.56)}{1507} } = 0.593[/tex]
Also provided would be the 90% confidence interval (0.527;0.593).
About 54% to 59% of all Americans, in our opinion, believe that the Civil War is still significant today.
And because the interval does not contain the value of 0.5, we can conclude that, at a 90% level of confidence, the percentage of Americans who believe that the Civil War is still relevant to American politics and political life is higher than 0.5. This result is consistent with the result of part b.
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solve (3-4i) (6i+7) - (2-3i)
show solving steps-- picture is provided.
Answer:
-7 i + 43
Step-by-step explanation:
Simplify the following:
(-4 i + 3) (6 i + 7) - (-3 i + 2)
(3 - 4 i) (7 + 6 i) = 3×7 + 3×6 i - 4 i×7 - 4 i×6 i = 21 + 18 i - 28 i + 24 = 45 - 10 i:
(-10 i + 45) - (-3 i + 2)
-(-3 i + 2) = 3 i - 2:
45 - 10 i + (3 i - 2)
45 - 10 i - 2 + 3 i = (45 - 2) + (-10 i + 3 i) = 43 - 7 i:
Answer: -7 i + 43
This probability distribution shows the
typical distribution of pitches thrown to a
batter in a given "at-bat" in a baseball game.
Pitches
1
2 3 4 5
Frequency 15 20 40 15 10
Find the probability that the pitcher will
throw 4 or fewer pitches to a batter.
p = [?]
Enter
D
the sum of four numbers is 1,764. oneof the numbers, n, is 40% more than the sum of the other three numbers. what is the value of n?
Four numbers has a sum of 1764 and the value of one of those numbers is 1029.
Use algebraic expressions to solve for the value of n.
Algebraic expression is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc).
One of the four numbers is already denoted as variable n. Let m be the sum of the three other numbers.
If the sum of the four numbers is 1,764, then:
n + m = 1764
If n is 40% more than the sum of the other three numbers, then:
n = 40% m + m
n = 1.4 m
Substitute n from the 2nd equation to the 1st equation.
n + m = 1764
1.4 m + m = 1764
2.4 m = 1764
m = 735
Recall that n = 1.4 m.
n = 1.4 (735)
n = 1029
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jean gray earns a graduated commission of 4 on her first $2000 of sales and 8 on all sales over $2000 jean's sales for the past week totaled $3925
Her commission for the week was $234.
It is given the total earning in past week = $3,925 and jean earns 4% for the first $2000
So, the commission = $2000 x 4/100 = $80
To find additional sales, the formula to refer is
Add –on sales = total sales – base sales
= 3,925 – 2000
= 1,925
For the $1,925 sales, Jeans earns 8% commission, Her commission
= 1,925*0.08 = $154
So, the total commission = $80 + $154 = $234
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Given that f(x)=x²- 7 and g(x)= 3x + 1, find (fg)(-1/3)
if it exists.
Answer: 7
Step-by-step explanation:
(fg)(-1/3)=
f(g(-1/3))=
f(3(-1/3) + 1)=
f(-1 + 1)=
f(0)=
0²- 7=7
Draw this Venn diagram. Classify the following numbers. 45, 24, 52, 30, 66, 15, 85, 90, 72, 60, 20, 38 What can you tell about the numbers in the intersection?
PLEASE HELP I NEED ANSWER PLSS I OFFER 45 POINTS
Answer:
put 244 add 7e8ue
Step-by-step explanation:
i53838 divede 73838
the hawaii visitors bureau collects data on visitors to hawaii. the following questions were among 16 asked in a questionnaire handed out to passengers during incoming airline flights.
Using sampling concepts, the population being studied is all visitors that are flying to the state of Hawaii.
What is the missing information?The problem is incomplete, but researching it on a search engine, it asks for us to identify who is the population of this study.
What is population and sample?Population: Collection or set of individuals or objects or events whose properties will be studied.Sample: The sample is a subset of the population, and a well chosen sample, that is, a representative sample will contain most of the information about the population parameter. A representative sample means that all groups of the population are inserted into the sample.In this problem, a set of visitors traveling to Hawaii were sampled, hence the population being studied is all visitors that are flying to the state of Hawaii.
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[tex]\sqrt{x} 255\\[/tex]
The square root of 255 is approximately 15.969.
Given,
Root 255, [tex]\sqrt{255}[/tex]
We have to find the square root of the number:
Square root of a number:
A number multiplied by itself is the square root of that number. Or we may say that after adding a number to itself, we must calculate its square root in order to go back to the original number. The square root of p, if it is a positive integer, is represented by p, so that p = q.
Now,
√255 = 15.9687194227
Which is approximately equals to 15.969
That is,
The square root of 255 is approximately 15.969
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find the ordered pairs marked on the graph
The ordered pairs of the given graph are;
(-2, 3), (4, 2), (0, -3), (2, -5), (-5, -4)
What are the Ordered Pairs?An ordered pair is defined as a composition of the x coordinate and the y coordinate, having two values written in a fixed order within parentheses.
Ordered Pair = (x, y)
Where;
x = abscissa, the distance measure of a point from the primary axis “x”
y = ordinate, the distance measure of a point from the secondary axis “y”
Thus the ordered pairs of the given graph are;
(-2, 3), (4, 2), (0, -3), (2, -5), (-5, -4)
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7 Complete each statement about multiplying positive
and negative integers using the word positive or
negative. For each statement, provide an example.
positive positive = positive
positive negative =
negative negative =
PLS HELP
A delivery person is carrying two packages. One package contains a 4-pound textbook and 5 identical workbooks. The other package contains a 6-pound textbook. The two packages weigh the same amount. What is the weight, in ounces, of each workbook? pls answer quick
On the double number line, 3 minutes corresponds to 180 beats.
0 ? 120 180 240 300
Beats:
Minutes:
0 1
2
3
4
5
How many beats are there in 3 minutes? Type your answer as a number.
0.000000006450 in scientific notation
Answer:
[tex]6.45*10^{-9}[/tex]
Step-by-step explanation:
Joshua moved 5 lawns in 4 hours fill out a table if equivalent ratios
Answer:
(25,20) , (45,36)
Step-by-step explanation:
I THINK??