Complete question:
You want to estimate the mean number of sentences in a magazineadvertisement. How many magazine advertisements must beincluded in the sample if you want to be 95% confident that thesample mean is within 1 sentence of the population mean ? (sigma =5)
Answer:
96
Step-by-step explanation:
We have level of confidence = 95%
Alpha = 1-0.95
= 0.05
Alpha/2 = 0.025
Z-alpha/2 = 1.96
E = margin of error = 1
For this question the formula to derthe sample size is given as:
n = [(Za/2 x sigma)/E]²
n = (1.96 x 5/1)²
n = 9.8²
= 96.04
So 96 magazines advertisement must be included in the sample to be 95% confident.
Evaluate the expression For x = 2 and y = 4
Answer:
ga is a counting number of times in
Step-by-step explanation:
k I have been working on this project for a year now so it will not care if we can get
expand the following 3x
k bye and sorry I have been thinking about traingle
There are 90 new houses being built in a neighborhood. Last month, 2/5 of them were sold. This month, 2/3 of the remaining houses were sold. How many houses are left to be sold???
Answer:
18
Step-by-step explanation:
2/5*90=36
90-36=54
2/3*54=36
54-36=18
Write an equation for the line passes through (0,0) and is parallel to a line that passes through (-5,3)and (2,1)
Answer:
28.9
Step-by-step explanation:
In ΔVWX, the measure of ∠X=90°, the measure of ∠W=9°, and WX = 8.7 feet. Find the length of XV to the nearest tenth of a foot.
(AUB) nc
[2]
A union b intersection c’
See the attached image.
We start this problem by finding the union of [tex]A[/tex] and [tex]B[/tex]. This is highlighted in green in the attachment.
Next, we find the intersection of that area and [tex]C[/tex] (highlighted in yellow). This means we need to find the area where both [tex]A\cup B[/tex] and [tex]C[/tex] are highlighted. This intersection is highlighted in pink and is the final answer.
(Apologies for the image quality.)
can someone help me with 8
Answer:
red
Step-by-step explanation:
2000 mm is 2m. Have a great day/night!
To be eligible for certain tax programs you can't make $15,000 or less per year nor $45,000 or more per year. Create an inequality to represent the range of this scenario interpret a salary that would be eligible for the tax programs, and then Identify a salary that would not be eligible,
Answer:
there is ia $30,000 range in which you are eligible and $14,000 and $46,000 thousand dollars are not eligible
The range of this scenario interpret a salary that would be eligible for the tax programs,
45000 > n > 15000.
A salary that would not be eligible,
n ≤ 15000 and n ≥ 45000.
What is an inequality?In mathematics, "inequality" refers to a relationship between two expressions or values that are not equal to each other. To solve the inequality, you may multiply or divide each side by the same positive number, add the same amount to each side, take the same amount away from each side, and more. You must flip the inequality sign if you multiply or divide either side by a negative number.
Given:
To be eligible for certain tax programs,
you can't make $15,000 or less per year nor $45,000 or more per year.
That means,
n > 15000
And n < 45000.
The range of this scenario interpret a salary that would be eligible for the tax programs,
45000 > n > 15000.
A salary that would not be eligible,
n ≤ 15000 and n ≥ 45000.
Therefore, the required values are given above.
To learn more about the inequality;
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you can combine -2n + -2 to get -4n
True or False?
Answer:
false
Step-by-step explanation:
Answer:
False
Step-by-step explanation:
I needs help.. Geometry :(
Answer:
9 lines of symmetry Hope it helps
I need help please. .
Answer:
i think c
Step-by-step explanation:
Find the values of x and y.
5x - 1
24
X
бу
x = 0, y = 0
Find the balance in an account at the end of 8 years if $6000 is invested at an interest rate of 4.2% that is compounded continuously.
a. $8396.03
b. $ 8338.60
c. $8262.77
d. $6257.37
Answer:
$8016.00
Step-by-step explanation:
I = 6000 × 0.042 × 8 = 2016
I = $ 2,016.00
$2,016.00 + $6,000.00 = 8,016.00
a rectangular box has 6 flat faces and ? straight edges
A.4
b.6
c.8
d.10
e.12
Answer:
12 straight edges
Answer: 12
Step-by-step explanation:
28
Select the correct answer.
The drama club has records of the length of the annual school plays for the last 10 years.
The length of the annual school play was 80 minutes initially. They then decided to increase the length of the play by 5 minutes every year for
the next 4 years. For the next 3 years, the length of the annual school play was constant. For the last 3 years, the length of the annual school play
was reduced by 10 minutes every year.
Which graph models the piecewise function for the given situation?
-6+ (-20) + (-40) + 3d
Answer: -66 + 3d or 3d - 66
Step-by-step explanation:
-6 + (-20) + (-40) + 3d
-6 - 20 - 40 + 3d
-26 - 40 + 3d
-66 + 3d or 3d - 66
Hope I helped!
8b
The following three shapes are based only on squares,
semicircles, and quarter circles. Find the perimeter and the area of
each shaded part. Give your answer as a completely simplified
exact value in terms of rt (no approximations).
Just the perimeter
Answer:
P = 36 - 9π
Step-by-step explanation:
Similar to solving the area
Answer: look at the pictureeeee
Ur welcome hahah
Jasmine has $26 to spend on binders and pens. The pack of pens cost $4.75. Each binder costs $5. Write an inequality to determine the maximum number of binders she can buy.
Answer
(5 x B) + 4.75 ≤ 26
B is the amount of binders.
A company provides bus trips to various events. The company charges $15 for each adult, a, and $8 for each child, c, for a trip. For an upcoming event, the company will provide transportation for 40 people and will earn $390. Which system of equations represents this situation?
Answer:
The answer is:
390= 15a+8c
40=a+c
Element X is a radioactive isotope such that every 81 years, its mass decreases by half. Given that the initial mass of a sample of Element X is 1800 grams, how much of the element would remain after 28 years, to the nearest whole number?
Answer:
15?
Step-by-step explanation:
Answer:
Step-by-step explanation:
Explain why the square root of a number is defined to be
equal to that number to the 1/2 power
9514 1404 393
Answer:
(x^(1/2))^2 = x^(2/2) = x
Step-by-step explanation:
The square root of a number, when multiplied by itself, gives the original number.
(√x)(√x) = x
The rule for exponents is that powers of the same base, when multiplied, will be the base to the sum of those powers.
(a^b)(a^c) = a^(b+c)
Also, the first power of a number is that number itself.
__
[tex]x^{\frac{1}{2}}\times x^{\frac{1}{2}}=x^{\frac{1}{2}+\frac{1}{2}}=x^1=x\\\\ \text{Compare to ...}\\\\ \sqrt{x}\times\sqrt{x}=x[/tex]
Answer:
Squaring and square root are inverses, so one should "undo" the other. That is, squaring the square root of a number results in the number. Using the power of a power rule, you multiply the exponents. Since a number to the first power is itself, the product of the exponents must equal 1. This means that the power of the square root must be the reciprocal of 2, or one half.
Step-by-step explanation:
EDGE 2020-2021
which statement is true about the pattern above
Answer:
there is no pattern above
Terry buys beads by the bag to make jewelry. There are 25 beads in each bag. Which
equation can he use to find the number of beads in any number of bags if:
n equals any number of bags, and t equals the total number of beads?
Answer:
The one in yellow is answer
Step-by-step explanation:
hoped this helped!
1q - 2x = 7
What is x
please im so stuck on this i will give brainliest
Answer: x
=
4
Step-by-step explanation:
Look at the triangle below.
Which of the following statements is not true?
a+b=y
180−(a+b)=y
x+y=180
180−x=a+
x+y=180 a+b=y
180−(a+b)=y
Help asap, will do brainliest!!! 5 more minutes!
John's family visited his grandmother over the weekend. The drive to her house took 2 hours at their usual speed. The trip home took 15 minutes longer because traffic was bad and they had to drive 5 mph slower. How many miles away is John's grandmother's house?
Answer:
135 miles
Step-by-step explanation:If you go 70 miles in ones hour, then you’ll go 140 miles in 2 hours. Then it took 6 minutes longer because of traffic, and in traffic he drove 1 mile excluding 5 because he was 5 mph slower.
ABCD is a parallelogram. Determine the measure of ∠B.
Question 19 options:
A) 52°
B) 96°
C) 39°
D) 78°
Answer:
D
Step-by-step explanation:
In parallelogram, opposite angles are congruent.
m∠B = m∠D
3x = x + 52 {Subtract x from both sides}
3x - x = 52 {Combine like terms}
2x = 52 {Divide both sides by 2}
x = 52/2
x = 26
m∠B = 3x = 3*26 = 78
I think the answer should be D)
because both sides should be equal to each other, and if you take 78/3, it equals 28, and 28+52=78, so both sides equal 78, which makes it D
Question 7 of 12
64 =
O A. 9
OB. 7
C. 8
O D. 16
Pleaseee
Answer:7
Step-by-step explanation:
Answer:
OB and it is 7 because
Step-by-step explanation:
i did this before XD si i could had gave you answer to everyone
jim had 20 to spend at the video rental he has a late fee of 4.00 and it will cost him 2.99 to rent each movie not including tax, which inequality can jim write to solve for the most number of movies, m, he can rent
Answer:
2.99m-4 (less than or equal to symbol after) 20
Step-by-step explanation:
This would come out too 5 movies because 20-4= 16 16-2.99=5.3 but it is impossible to buy 5.3 movies so you would round it down to 5
Someone please help me with this question
Answer:
Jinsoul from Loona
Step-by-step explanation:
In order to solve this problem, you must do the famous math operation: Jinsoul from Loona
Have a nice day!
PLEASE HELP FIND THE MEDIAN OF THESE NUMBERS:
55, 42, 78, 99, 69, 83, 74, 83, 97
A weight lifter lifts a setof 1250kg weights a vertical distance of 2m in a weight lifting contest what potential energy do the weights now possess
Answer:
U = mgh = (1250 kg)(9.8 m/s2)(2m) = ? J
HOPE THIS HELPS
The potential energy of the weights is 24500 J.
What is potential energy?Potential energy is the energy an object possesses due to its position.
It depends on its mass, height, and the force of gravity.
Potential energy = mgh
Where g is the acceleration due to gravity and g is 9.8 m/s².
We have,
Potential energy = mgh
where:
m = mass of the weights
g = acceleration due to gravity
h = vertical distance of the weights
Now,
Substituting the values.
Potential energy.
= 1250 x 9.8 x 2
= 24500 J
Thus,
The potential energy of the weights is 24500 J.
Learn more about potential energy here:
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