Answer:
The answer is 9
Step-by-step explanation:
if u 170-125= 45 then u divide 5 into 45 and u get 9
Which statement is true about AC?
Answer:
A.
The electrons move back and forth.
Step-by-step explanation:
i took the test
A study by Consumer Reports showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands. To investigate whether this result applies to its own product, the manufacturer of a national name-brand ketchup asked a sample of shoppers whether they believed that supermarket ketchup was as good as the national brand ketchup.a. Formulate the hypotheses that could be used to determine whether the percentage of supermarket shoppers who believe that the supermarket ketchup was as good as the national brand ketchup differed from 64%.b. If a sample of 100 shoppers showed 52 stating that the supermarket brand was as good as the national brand, what is the p-value?c. At α= .05, what is your conclusion?d. Should the national brand ketchup manufacturer be pleased with this conclusion?Explain.
Answer:
Step-by-step explanation:
Given that:
A study is conducted and the study by Consumer Reports showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands.
a)
Thus; we formulate the null and the alternative hypotheses as follows:
The proportion is ; [tex]\frac{64}{100}[/tex] = 0.64
Null hypothesis: [tex]{H_0}:p = 0.64[/tex]
The Null hypothesis states that there is no evidence that “the percentage of supermarket shoppers believes that the supermarket ketchup is good as the national brand ketchup differ form 64%”.
Alternative hypothesis: [tex]{H_a}:p \ne 0.64H[/tex]
The Alternative hypothesis states that there is evidence that “the percentage of supermarket shoppers believes that the supermarket ketchup is good as the national brand ketchup differ form 64%”.
b)
The proportion of the population = 0.64
The sample size n = 100
The number of shoppers = 52 stating that the supermarket brand was as good as the national brand
The sample proportion [tex]\hat p = \frac{52}{100}[/tex]
[tex]\hat p = 0.52[/tex]
The z - value is calculated by the formula:
[tex]z = \dfrac{\hat p-p}{\frac{\sqrt{ p(1-p)}}{100 }}[/tex]
[tex]z = \dfrac{0.52-0.64}{\frac{\sqrt{ 0.64(1-0.64)}}{100 }}[/tex]
[tex]z = \dfrac{-0.12}{0.048 }}[/tex]
z = -2.50
Since z = -2.50
the p-value = 2P(Z ≤ -2.50)
p-value = 2 × 0.0062
The p-value = 0.0124
c)
At significance level, ∝ = 0.05 ; The p-value = 0.0124
According to the rejection rule, if p-value is less than 0.05 then we will reject null hypothesis at ∝ = 0.05
Hence, the p-value =0.0124 < ∝ (=0.05)
According to the reject rule; reject null hypothesis.
Conclusion: There is no evidence at all that the percentage of supermarket shoppers believes that the supermarket ketchup is good as the national brand ketchup differ form 64%.
d) we know that the significance level of ∝ = 0.05
The value[tex]{z__{0.05}}[/tex] is obtained as:
[tex]P\left( {\left| Z \right| \le z} \right) = 0.05[/tex]
Now; to determine Z ; we locate the probability value of 0.05 form the table of standard normal distribution. Then we proceed to the left until the first column is reached and the value is 1.90. Also , we move upward until we reach the top and the value is 0.06. Now; the intersection of the row and column results the area to the left of z
This implies that :[tex]P(Z \leq -1.96)=0.05[/tex]
The critical value for left tail is -1.96 and the critical value for right tail is 1.96.
Conclusion:
The critical value is -1.96 and the value of test statistic is - 2.50. Here, we can see that the value of test statistic is lesser than the critical value. Hence, we can be concluded that there is evidence that reject the null hypothesis.
Therefore, Yes, the national brand ketchup manufacturer is pleased with the conclusion.
Following are the solution to the given points:
For point a:
Calculation of the hypotheses:
Null hypothesis [tex]\ H_0:p=0.64 \\\\[/tex]
Alternative hypothesis [tex]\ H_a : p \neq 0.64[/tex]
For point b:
Checking the value:
[tex]\to np_0=100 \cdot 0.64=64>5\\\\\to n(1-p_0)=100\cdot(1-0.64)=100 \cdot 0.36= 36 > 5[/tex]
Test statistic:
[tex]\to Z= \frac{0.52-0.64}{\sqrt{\frac{0.64 \times 0.36}{100} }}=-2.50[/tex]
Since there are two-sided for the test. so, [tex]z=-2.50[/tex] is negative.
Calculation of the P-value: [tex]\to p=2P(z \leq -2.50)=2 \cdot 0.00621=0.01242<\alpha =0.05[/tex]
For point C:
In this choice, the Null hypothesis value should be rejected.
For point D:
Evidence indicating the percent of supermarket customers who believe supermarket Ketchup is just as good as brand name Ketchup differs from 64%. As a result, the national brand Ketchup maker must be dissatisfied with this conclusion so because results could be applied to its product.Learn more:
brainly.com/question/16015381
There are 140 coins in a piggy bank of which 20% are dimes. What is the least possible amount of money that could be in the piggy bank?
guys, I don't understand this question is this correct??
Answer:
I think you are correct. bc you have 4 different caps, and four different sections of a spinner that are equal same with the cap. So I believe so.
Step-by-step explanation:
I hope this helps! Im in algebra 2 so its been awhile since i have done this. Good Luck!!:)
Answer:
A
Step-by-step explanation:
I agree with your answer. The question is basically just saying the beverage company randomly chooses one of those letters to put under the bottle caps. For example, one bottle cap might have a T on it, and another might have an A on it. If you try to get all 4 letters, then you will have to keep buying those drinks until you manage to collect all 4 letters. Therefore, there are only 4 possible options for which letter you can get.
If you spin a spinner that has 4 equal sections, then this is similar. You have 4 possible options you can get.
Hope this helps! :)
Uma sala tem o formato de um trapézio, determine a área dessa sala.
1 ponto
Imagem sem legenda
(a) 10,4 m²
(b) 25,6 m²
(c) 12,8 m²
(d) 15,2 m²
Answer:
[tex]\large \boxed{\text{12.8 m}^{2}}[/tex]
Step-by-st ep explanation:
Assume the room is like the image below.
The formula for the area of a trapezoid is
A = ½(a + b)h,
where a and b are the lengths of the parallel sides and h is the distance between them.
Data:
a = 3.8 m
b = 2.6 m
h = 4 m
Calculation:
[tex]\begin{array}{rcl}A & = & \dfrac{1}{2}(a + b)h\\\\& = & \dfrac{1}{2}(3.8 + 2.6)\times 4\\\\& = & \dfrac{1}{2}(6.4) \times 4\\\\A & = & \dfrac{1}{2}\times25.6\\\\& = & \textbf{12.8 m}^{\mathbf{2}}\\\end{array}\\\text{The area of the room is $\large \boxed{\textbf{12.8 m}^{\mathbf{2}}}$}[/tex]
Consider random samples of size 40 from a population with proportion 0.15.
(a) Find the standard error of the distribution of sample proportions.
Round your answer for the standard error to three decimal places.
mean=______
standard error=_______
(b) Is the sample size large enough for the Central Limit Theorem to apply?
1. Yes
2. No
Answer:
a) The mean is 0.15 and the standard error is 0.056.
b) 1. Yes
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For proportions p, in samples of size n, the mean is [tex]\mu = p[/tex] and the standard error is [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex]. The Central Limit Theorem applies is np > 5 and np(1-p)>5.
In this question:
[tex]n = 40, p = 0.15[/tex]
So
(a) Find the mean and the standard error of the distribution of sample proportions.
[tex]\mu = 0.15, s = \sqrt{\frac{0.15*0.85}{40}} = 0.056[/tex]
So the mean is 0.15 and the standard error is 0.056.
(b) Is the sample size large enough for the Central Limit Theorem to apply?
np = 40*0.15 = 6 > 5
np(1-p) = 40*0.15*0.85 = 5.1>5
So yes
The standard error of the distribution of sample proportions is 0.056 and mean is 0.15.
Yes, the sample size is enough for the Central Limit Theorem to apply.
(a). Given that, size of sample, [tex]n=40[/tex]
Proportion, [tex]p=0.15[/tex]
In the distribution of sample proportions, mean [tex]\mu=p[/tex]
and, standard error = [tex]\sqrt{\frac{p(1-p)}{n} }[/tex]
So, mean [tex]\mu=0.15[/tex]
Standard error =[tex]\sqrt{\frac{0.15(1-0.15)}{40} }=0.056[/tex]
(b). The Central Limit Theorem applies if np > 5 .
[tex]np=40*0.15=6>5[/tex]
Thus, the Central Limit Theorem is applied.
Learn more:
https://brainly.com/question/22233199
Consider the equation
3 (4x – 2) + 6 = 5 (2x – 8) + 2
>
(Solve for x first!!)
Below are two truths and one lie:
>
1. x is a negative number
2. 3x>2x
3. x+5>x
Answer:
-19
Step-by-step explanation:
12x - 6 + 6 = 10x - 40 + 2
12x - 10x = -40 + 2 + 6 -6
2x = -38
x = -38/2 = -19
The two truths are:
x is a negative number (x = -19)
x+5>x (if x is positive, is true; if x is negative, is also true)
The one lie is:
3x > 2x (if x is negative, the expression will be 3x < 2x)
A figure is translated <3, -3>. Which translation will move the image back to the
preimage original position?
The original translation < 3, -3 > moves the figure 3 units to the right and 3 units down.
We undo this by moving 3 units left and 3 units up, which is what < -3, 3 > describes.
The translation <-3, 3> will move the image back to the preimage original position.
What is translation of image ?
The displacement of a image from one place to another is called translation of image.
What is the original position of the image ?
If a figure is on the origin, i.e. (0, 0), then if turns 3 cells right.
We can see that, It translated as (3,0)
Again if it go down 3 cells, then the translated one is (3, -3)
So, moving it back, we should translate it 3 cells left & 3 cells up.
So after translation, it should be (-3, 3).
Learn more about Translation here :
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#SPJ2
write in the simplest form 15:45
Answer:
1:3
Step-by-step explanation:
:))
1:3
15 / 15 = 1
45 / 15 = 3
So its 1:3
Will records the wins and losses for his high school basketball team each year. He notices that the ratio of wins to losses has
been consistent each year,
VX
Wins
Losses
18
2
45
5
36
4
27
X
Using the information in the table, how many losses should he predict for next year if the number of games won is 272
1
ОО
3
6
9
Save and Exit
Next
Submit
Mark this and return
Answer:
3
Step-by-step explanation:
you have to multiply by 9.
2times9=18,5times 9=45,4times 9=36,
3times9=27.
Express 72 as a product of its prime factors
Answer:
okay
Step-by-step explanation:
2^3 times 3^2
Answer:
2^3*9
Step-by-step explanation:
72-9
8-2
4-2
2-2
1
Please choose the correct answer.
Answer:
976
Step-by-step explanation:
would you stop it already
Answer: 976m^2
Step-by-step explanation:
An easy way to find the surface area of a prism is to find the area of each side and add them all together.
Area of rectangle:
14mx10m=140m^2
Area of rectangle:
25mx10=250m^2
Since there are 2 of the long rectangles, you multiply by 2:
250m^2x2=500m^2
Area of triangle:
(24mx14m)/2=168m^2
Since there are 2 triangles, you multiply by 2:
168m^2x2=336m^2
Surface Area:
140+500+336=976m^2
ANYONE PLZZZ THSI IS DUE IN AN HOUR!!!!! Will mark the brainliest
Answer:
A is correct.
Step-by-step explanation:
Left figure's area = base x height = L x h x 6 = 6Lh
Right figure's area = L x h + L x h + L x h + L x h + L x h + L x h = 6Lh
Hope this helps!
:)
Lynn is making custom bricks. She combines 39 pounds of water and 48 pounds of brick dust
in a mixing bucket. She spills 13 pounds of the mixture while stirring the contents. The
mixture is then poured into small dirt holes to make bricks. Each brick requires 7 pounds of
mixture, and the leftover mixture is washed out of the mixing bucket
What is the greatest number of bricks Lynn can make?
bricks
How many pounds of mixture will be washed out of the bucket if Lynn makes the greatest
number of bricks?
pounds
Greatest number of bricks Lynn can make is 10 and 4 pounds of the mixture will be washed out of the bucket
Pounds of water = 39
Pounds of brick dust = 48
Total mixture = 87 pounds
Mixture spilled = 13 pounds
Mixture remaining = 87 pounds - 13 pounds
= 74 pounds
Mixture in each brick holes = 7 pounds of mixture
Greatest number of bricks Lynn can make = Mixture remaining ÷ Mixture in each brick holes
= 74 pounds ÷ 7 pounds
= 10 remaining 4 pounds
Therefore,
Greatest number of bricks Lynn can make is 10 and 4 pounds of the mixture will be washed out of the bucket
https://brainly.com/question/16718414
Answer: Greatest number lynn can make is 10 Bricks.
4 pounds will be washed out the bucket.
Step-by-step explanation:
Help Please???? Question is above, it has to do with repeating decimal converting to a fraction
About how many inches wide is the toolbox?
[tex]7.2 in. \: gum \: wrappers[/tex]
[tex]12.49in. \: shoelaces [/tex]
[tex]4.579in. \: paperclips[/tex]
Answer FAST PLS!!!!!
Answer: 24
Step-by-step explanation:
7+12+5=24
Answer:
24
Step-by-step explanation:
What is the diameter of a sphere with a volume of 6329\text{ ft}^3,6329 ft
3
, to the nearest tenth of a foot?
Answer:
Diameter = 22.9 ft
Step-by-step explanation:
We are told that volume of the sphere is 6329 ft³
Now formula for volume of sphere is given as;
V = (4/3)πr³
Thus,
(4/3)πr³ = 6329
Multiply both sides by 3/4 to get;
πr³ = (6329) * 3/4
πr³ = 4746.75
Divide both sides by π to obtain;
r³ = 4746.75/π
r = ∛(4746.75/π)
r = 11.4749 ft
Now, diameter = 2 x radius
Diameter = 2 × 11.4749
Diameter = 22.9498 ft
Approximating to a tenth of a feet gives;
Diameter = 22.9 ft
What fraction is equal to 35%
Answer:
7/20
Step-by-step explanation:
35/100 is simplified to 7/20. Here is another example with a different percentage. Change 25% to a fraction. 25/100 is simplified to 1/4
Find g(x) if it is known that g(2t)=8t−1.
Answer:
g(x) = 4x - 1
Step-by-step explanation:
Linear function in the format: g(x) = ax + b
g(2t) is a*(2t)+b
g(2t) = 8t - 1 means that:
when x = 2t, g = 8t - 1.
So
Equaling both sides
8t - 1 = a*2t + b
So
b = -1,
and
2a = 8, a = 8/2, a = 4
So
g(x) = 4x - 1
If you could help me, please answer the attachment below.
A bag of fertilizer covers 3000 square feet of lawn. Find how many bags of fertilizer should be purchased to cover a rectangular lawn 230 feet by 180 feet
Answer:
14 bags
Step-by-step explanation:
Dimension of lawn : 230 feet by 180 feet
area of rectangle is given by length * width
Since lawn is rectangular area of lawn = 230 feet * 180 feet = 41,400 sq. feet
Given that one bag of fertilizer covers 3000 square feet of lawn.
Thus , to find no. of bags required to cover whole lawn will be
total area of lawn/area which one bag of fertilizer covers
no. of bags required to cover whole lawn = 41,400 sq. feet/3000 sq. feet
= 13.8 bags.
As no. of bags cannot be fractional , hence rounding bag to nearest unit place is 14 bags.
a bakery receives 100 loaves of bread each day of the week. The table below displays how much is spent each day last week. The bakery uses FIFO. It had 125 loaves of bread left on Friday afternoon, what is the current value of its stock
Answer:
$275
Step-by-step explanation:
Day Price Unit price
Monday $245 $2.45
Tuesday $315 $3.15
Wednesday $275 $2.75
Thursday $200 $2.00
Friday $225 $2.25
the first in, first out (FIFO) method uses the price of the oldest units to determine the cost of goods sold:
the ending inventory should = 100 units purchased Friday + 25 units purchased Thursday = (100 x $2.25) + ($25 x $2) = $225 + $50 = $275
Answer: $375
Step-by-step explanation:
If sin theta = -(sqrt(3))/2 and pi < =theta <= (3pi)/2, determine the value of cos(20)
Answer:
Sin theta = -1/2
Step-by-step explanation:
pi < =theta <= (3pi)/2.
The above expression shows we are dealing with angle on the 3rd quadrant.
I.e greater than 180 but less than 270.
So sin tita = (√3)/2
But sin and cos are all negative in the third quadrant.
So tita = sin^-1(√3)/2
tita = 60°
Cos tita = cos 60
Cos tita = cos 60
Cos60 = 0.5
Cos 60 = 1/2
If
sin theta = -(sqrt(3))/2
Sin theta = -1/2
PLEASE HELP!!!
Given the function f(x)=(x+1)(x-3)
a) What are the x-intercepts?
b)What is the axis of symmetry?
c)What is the vertex?
Answer:
a) (-1,0) and (3,0)
b) x=1
c) (1, -4)
Step-by-step explanation:
As you can see in the graph below, the x intercepts of this graph are at (-1,0) and (3,0), the axis of symmetry is x=1, and the vertex is at (1,-4). Hope this helps!
The line that passes through the point (2, −8) and has a slope of −1 is given by the equation y + = (x − ).
Answer:
8 = -1 (x - 2)
:)
Answer:
8 = -1 (x - 2)
Step-by-step explanation:
Look on my last post giving 70 points for one math problem if u answer I will rate u brainiest on this question and on that one
Answer:
did it
Step-by-step explanation:
A newspaper article is summarized: According to a new study, teachers may be more inclined to give higher grades to students, hoping to gain favor with the university administrators who grant tenure. The study examined the average grade and teaching evaluation in a large number of courses given in 1997 in order to investigate the effects of grade inflation on evaluations. " I am concerned with student evaluations because instruction has become a popularity contest for some teachers, " said Professor Smith, who recently completed the study. Results showed higher grades directly corresponded to a more positive evaluation. The last statement above means the study found that:_________.
a) Higher course grades are positively associated with teaching evaluation
b) Teaching evaluation is negatively associated with course grade
c) There was a perfect positive correlation between course grade and teaching evaluation
d) Each letter grade increase is associated with a 10% increase in positive evaluations for the professor.
Is the relationship shown by the data linear? If so, model the data with an equation x: -7,-5,-3,-1 y: 5,9,13,17
Answer:
Y = 2X + 19
Step-by-step explanation:
the relationship is linear
gradient equals 2
I need help with this??
Simplify ⁴√5x times ⁴√2x
Answer:
[tex]\sqrt[4]{10x2}[/tex]
Answer:
⁴√10√x
Step-by-step explanation:
⁴√5x*⁴√2x
⁴√5x = ⁴√5⁴√x
=⁴√5 ⁴√x⁴√2x
⁴√2x = ⁴√2⁴√x
=⁴√5⁴√2⁴√x⁴√x
⁴√x⁴√x = x1/4x1/4 = x1/4+1/4
=⁴√5⁴√2⁴x1/4+1/4
1/4+1/4 = 1/2
=⁴√5⁴√2⁴√x
⁴√5⁴√2⁴ = ⁴√5*2
=⁴√5*2√x
5*2 = 10
= ⁴√10√x