Answers
Answer:
1. C
2. D
3. D
4. E
5. B
6. G
7. unknown
Related Questions
A Realtor claims that no more than half of the homes he sells are sold for less than the asking price. When reviewing a random sample of 14 sales over the past year, he found that actually 10 were sold below the asking price.
Required:
a. The assumption of normality is justified.
b. Calculate a p-value for the observed sample outcome, using the normal distribution.
c. At the 0.05 level of significance in a right-tailed test, is the proportion of homes sold for less than the asking price greater than 50%?
Answers
A rabbit runs 35 miles per hour. A fox can run 21 miles in half an hour. Which animal is faster, and by how much?
Answers
Answer:
The fox can run faster by a factor of 7 miles per hour
Step-by-step explanation:
If the fox runs 21 miles in half of an hour, that means that by multiplying the fraction 21miles/0.5hours by 2/2 you can find that the fox runs 42 miles per hour, 7 miles per hour faster than the rabbit.
Answer:
The Fox, by 7 Miles per hour
Step-by-step explanation:
The rabbit runs 35 Miles per hour
The Fox runs 21 in half an hour
1 hour - 30 minutes = 30 minutes meaning we have to double the foxes miles
21 x 2 = 42
42>32
To find out by how much do 42-32 and we get 7 Miles per hour.
a town's population was 7500 at the beginning of the year 2000 and has been decreasing by 3.2 % each year thereafter.
Answers
Answer:
In 2022, the town's population is 2220.
Step-by-step explanation:
It currently the year 2022. Hence, 22 years have passed since 2000.
2022 − 2000 = 22
To solve for the town's population today, first multiply the years passed since 2000 by the percent decrease each year.
\(22 \, \textrm{years} \times \dfrac{3.2 \, \%}{\textrm{year}} = 70.4 \, \%\)
Then, subtract that percent of the population in 2000 from the population in 2000.
\(7500-(70.4 \,\% \cdot 7500)\)
\(= 7500 - 5280\)
\(=2220\)
Given that A={1,2,3,4,5} list the elements of the following sets. i.{x2:x€A} ii.{ :x€A} iii.{2x :x€A} iv.{4x+1:x€A}
Answers
Answer:no idea
Step-by-step explanation:
Use the t-distribution to find a confidence interval for a mean mu given the relevant sample results. Give the best point estimate for mu, the margin of error, and the confidence interval. Assume the results come from a random sample from a population that is approximately normally distributed. A 95% confidence interval for mu using the sample results x-bar equals 76.4, s = 8.6, and n = 42.
Point estimate = ?
Margin of error = ?
Answers
Answer:
Point estimate = 76.4
Margin of Error = 2.680
Step-by-step explanation:
Given that distribution is approximately normal;
The point estimate = sample mean, xbar = 76.4
The margin of error = Zcritical * s/√n
Tcritical at 95%, df = 42 - 1 = 41
Tcritical(0.05, 41) = 2.0195
Margin of Error = 2.0195 * (8.6/√42)
Margin of Error = 2.0195 * 1.327
Margin of Error = 2.67989
Margin of Error = 2.680
PLZ HELP ASAP!!! IM STUCK!!!!!
Answers
Answer:
78.5% chanceStep-by-step explanation:
the area of the square is 16 in² and the area of the circle is 12.566in² divide the two to get 0.7852 and then multipy by 100 to make a percentage
Which property of addition is illustrated by each of the following examples
Answers
Answer:
inverse property, commutative
Step-by-step explanation:
on edge2020
Answer:
inverse and the next one is commutative
Step-by-step explanation:
what is midpoint if tu =4× and uv =X +9
Answers
Answer:
12Step-by-step explanation:
Given
TU = 4xUV = x + 9Finding the value of x
TU = UV4x = x+93x = 9x = 3Midpoint = 4x = 4*3 = 12
A researcher reports survey results by stating that the standard error of the mean is 25 the population standard deviation is 400. Use z-table.
a. How large was the sample used in this survey?
b. What is the probability that the point estimate was within ±15 of the population mean?
Answers
Answer:
a) A sample of 256 was used in this survey.
b) 45.14% probability that the point estimate was within ±15 of the population mean
Step-by-step explanation:
This question is solved using the normal probability distribution and the central limit theorem.
Normal probability distribution
When the distribution is normal, we use the z-score formula.
In a set with mean \(\mu\) and standard deviation \(\sigma\), the zscore of a measure X is given by:
\(Z = \frac{X - \mu}{\sigma}\)
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \(\mu\) and standard deviation \(\sigma\), the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \(\mu\) and standard deviation \(s = \frac{\sigma}{\sqrt{n}}\).
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
a. How large was the sample used in this survey?
We have that \(s = 25, \sigma = 400\). We want to find n, so:
\(s = \frac{\sigma}{\sqrt{n}}\)
\(25 = \frac{400}{\sqrt{n}}\)
\(25\sqrt{n} = 400\)
\(\sqrt{n} = \frac{400}{25}\)
\(\sqrt{n} = 16\)
\((\sqrt{n})^2 = 16^2\(
\(n = 256\)
A sample of 256 was used in this survey.
b. What is the probability that the point estimate was within ±15 of the population mean?
15 is the bounds with want, 25 is the standard error. So
Z = 15/25 = 0.6 has a pvalue of 0.7257
Z = -15/25 = -0.6 has a pvalue of 0.2743
0.7257 - 0.2743 = 0.4514
45.14% probability that the point estimate was within ±15 of the population mean
Select the correct answer. Joel and Kevin are each putting money in a savings account to buy a new bicycle. The amount, in dollars, in Joel's savings account, x weeks after the start of the year, is modeled by function j. The amount of money in Kevin's account, at the same time, is modeled by function k. j(x) = 25 + 3x k(x) = 15 + 2x Which function correctly represents how much more money, in dollars, is in Joel's account than in Kevin's account x weeks after the start of the year? O A. (j − k)(x) = 40 + 5x (j − k)(x) = 40 + x (j-k)(x) = 10 + 5x (j-k)(x) = 10 + x O B. C. O D. Reset dtry Next
Answers
The correct answer is (j - k)(x) = 10 + x.
To find the difference in the amount of money between Joel's and Kevin's accounts, we subtract the value of Kevin's account (k(x)) from Joel's account (j(x)).
(j - k)(x) = (25 + 3x) - (15 + 2x)
= 25 - 15 + 3x - 2x
= 10 + x
This expression represents how much more money is in Joel's account compared to Kevin's account after x weeks.
Therefore, the correct function is (j - k)(x) = 10 + x.
for such more question on Kevin's account
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PLS HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
it will be choice 3
Step-by-step explanation:
as if you bend each shape of each of them the only choice that will give you a pyramide with a omitted side
Find non-invertible matrices
A,B
such that
A+B
is invertible. Choose
A,B
so that (1) neither is a diagonal matrix and (2)
A,B
are not scalar multiples of each other.
Answers
\(A =\left[\begin{array}{ccc}3&0\\-2&1\\\end{array}\right]\) , \(B =\left[\begin{array}{ccc}-2&0\\2&0\\\end{array}\right]\) so that A,B are non-invertible matrices and A+B is invertible.
An invertible matrix is a matrix in given square matrix A of order n × n is called invertible if there exists another n × n square matrix B such that, AB = BA = Iₙ, where Iₙ is an identity matrix of order n × n.
A non-invertible matrix is a matrix that does not have an inverse, i.e. non-invertible matrices do not satisfy the requisite condition to be invertible.
We have to find non-invertible matrices A,B such that A+B is invertible
so, A =\(\left[\begin{array}{ccc}3&0\\-2&1\\\end{array}\right]\)
and B =\(\left[\begin{array}{ccc}-2&0\\2&0\\\end{array}\right]\)
AB = \(\left[\begin{array}{ccc}-6&0\\6&0\\\end{array}\right]\)
Therefore A and B matrix are non- invertible
A + B = \(\left[\begin{array}{ccc}1&0\\0&1\\\end{array}\right]\)
A square matrix in which every element except the principal diagonal elements is zero is called a Diagonal Matrix.
so, A,B neither is a diagonal matrix and A,B are not scalar multiples of each other.
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Which graph has the same end behavior as f (x) = StartFraction negative 6 x Superscript 5 Baseline minus x cubed + 7 x Over 2 x squared + 1 EndFraction
Answers
The graph with the same end behavior is the one in option C.
Which graph has the same end behavior?The given function has a numerator with a negative leading coefficient and an odd degree, while the denominator is a quadratic polynomial.
It will mean that as x tends to negative infinity, the function tends to infinity, and as x tends to positive infinity, the function tends to negative infinty, that is the end behavior of the given function.
The graph with that end behavior is the same one than in option C.
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A bag of sugar contains 420g. A
special offer packet contains an extra
15%. Work out how much extra sugar
is in the special offer packet.
Answers
Answer:
63g extra
Step-by-step explanation:
420 x 0.15 =63 g
the perimeter of a regular octagon is 18 cm find the length of each side
Answers
Answer:
Each side will measure 2.25 cm
Step-by-step explanation:
Perimeter is the sum of all the sides of a shape.
Since an octagon has 8 sides and the perimeter is 18,we simply divide 18 by 8.
18 ÷ 8 = 2.25
Have a wonderful day.
What is the distance between-21 and 6 on a number line in units
Answers
Answer: 27
Step-by-step explanation:
-21 to 6= 27
The difference between the numbers -21 and 6 is 27.
What is a number line?A number line in elementary mathematics is a representation of a graduated straight line that serves as an abstraction for real numbers, represented by the symbol R." It is assumed that every point on a number line corresponds to a real number and that every real number corresponds to a point.
Given that the two numbers are -21 and 6. The distance between the two numbers will be calculated as,
Distance = 6 - ( -21 )
Distance = 6 + 21
Distance = 27
Hence, the difference is 27.
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James has already saved $68 for the $200 video game system.
If he earns $5.50 per hour in his job, how many hours does he need to work to earn the
remainder of the money he needs to buy the video game system?
Answers
Answer: 24 hours
Step-by-step explanation:
First, we will find what he needs to make still.
$200 - $68 = $132
Next, we will divide by $5.50 to find the hours needed since he makes $5.50 per hour.
$132 / $5.50 = 24 hours
Factor the expression.
Need help
Answers
(the first number is 13x to the second power)
9 mi
12 mi
What is the length of the hypotenuse?
miles
Answers
The formula A = P(1 + r) can be used to relate the future value A of a deposit of P dollarsin an account that earns an annual interest rate r (expressed as a decimal) after t years.a. Solve the formula for P.b. How much would you have to deposit today in order to have $5000 in 4 years in abank account that pays 5% annual interest?
Answers
From the question we were given the formular:
A = P(1 + r)^t
Where:
A is the future value of P in dollars
r is the annual interest rate
t is the period in years.
(a) We are asked to solve the formula for P
A = P(1 + r)^t
A = (1 + r)^t * P
P = A
(1 + r)^t
(b) How much would you have to deposit today in order to have $5000 in 4 years in abank account that pays 5% annual interest?
Given:
A = $5000
r = 5%
t = 4 years
P = A
(1 + r)^t
P = 5000
(1 + 5/100)^4
P = 5000
(1 + 0.05)^4
P = 5000
(1.05)^4
P = 5000
1.2155
P = $4113.53
If a² = 7/36, then a is a) Rational b) irrational c) whole number d) integer
Answers
Answer:
a = + or - sqrt(7)/6, which are irrational ( Answer Choice (b) ) for either case.
Step-by-step explanation:
a^2 = 7/36 implies that
a^2 - 7/36 = 0, by subtracting 7/36 from both sides of the equation, which implies that
(a - sqrt(7)/6)(a + sqrt(7)/6) = 0, by factoring, which implies that
a - sqrt(7)/6 = 0 or a + sqrt(7)/6 = 0, by the zero product property of the real number system, which implies that
a = sqrt(7)/6 or a = - sqrt(7)/6, which are both irrational, since sqrt(7) is irrational and an irrational number divided by an integer (other than 0) is irrational.
Please help!!!!!!!!!!!!
Answers
The answer: m∠AFB = 78°
Ok done. Thank to me :>
pasagot nmn po thanks
Answers
Answer:
wag Po lagi umasa sa brainl.
determine if true(2+x)^4=6+x^4
Answers
The expression on the left hand side is,
\(\begin{gathered} (2+x)^4=((2+x)^2)^2 \\ =(4+x^2+4x)^2 \\ =(16+x^4+16x^2+8x^2+8x^3+32x) \end{gathered}\)The expression on the right hand side is ,
\(16+x^4\)Thus,
\(\text{LHS}\ne RHS\)Thus, it it not true.
Please Help.... 50 points.
Answers
Answer:
94
Step-by-step explanation:
Answer:
94 is the answer
Step-by-step explanation:
CAN SOMEONE PLEASE ANSWER THIS QUICKLY I DONT GOT TIME
Answers
Answer:
1: 3/32. 2: 3/8. 3: 1/20
my dear
Plz help me well mark brainliest if correct........?.??..?.?.?
Answers
Answer:
the answer is a
Step-by-step explanation:
William’s car used 2 gallons to travel 68 miles. How far can he travel on 9 gallons?
Answers
Answer:
306 miles
Step-by-step explanation:
68 / 2 = 34 miles on one tank of gas
34 x 9 = 306 miles
Write equation of the graph Below. (EASY! 10 Points)
Answers
Explanation
We know a parabola the opens “down” if ax^2 is < 0 (negative).
So we eliminate options B and C that are +
A.
- x^2 + 5 = 0
add x^2 to both sides to isolate variable
-x^2 + x^2 + 5 = 0 + x^2
Simplify
5 = x^2
Take square root of both sides
√5 = √x^2
+ - 2.236 = x
The given graph shows the line crossing the x axis at just over +2 and -2 so
A) -x^2 + 5 is the correct solution
I graphed it to prove my solution
According to this diagram, what is tan 62 degrees ?
Answers
Answer:
According to this diagram, the tan 62 degrees, is the ratio of the opposite side and the adjacent side of the triangle which is equal to 1.875 units.
What is the right angle triangle property?
In a right-angle triangle ratio of the opposite side to the adjacent side is equal to the tangent angle between the adjacent side and the hypotenuse side.
Here, (b) is the opposite side, (a) is the adjacent side, and is the angle made between the adjacent side and the hypotenuse side.
The sides of the triangle are 8, 15, and 17 units long and the measure of the angles of the right angle triangle is 62, 90, and 28 degrees.
Re-draw, the Here in the given triangle, the base is the side which is 15 units long. Re-draw the triangle as shown below.
In the attached triangle below, the opposite side of the triangle is 15 units and the adjacent side of the triangle is 8 units long.
The angle between the opposite side and the adjacent side is 62 degrees. Thus using the right angle triangle property as,
Thus, according to this diagram, the tan 62 degrees, is the ratio of the opposite side and the adjacent side of the triangle which is equal to 1.875 units.
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