Answer:
The question is incomplete, but the step-by-step procedures are given to solve the question.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.99}{2} = 0.005[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.005 = 0.995[/tex], so Z = 2.575.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
[tex]M = 2.575\frac{\sigma}{\sqrt{n}}[/tex]
The lower end of the interval is the sample mean subtracted by M.
The upper end of the interval is the sample mean added to M.
The 99% confidence interval for the population mean amount of beverage in 16-ounce beverage cans is (lower end, upper end).
I always get lost what is 1-1=. Is it 0 or 1.??????
Answer:
1-1=0 haha
Step-by-step explanation:
if you have one ball and then take away one ball, you will have zero balls
Following a major earthquake, the cite engineer must determine whether the stadium is structurally sound for an upcoming athletic event. If the null hypothesis is" the stadium is structurally sound, and the alternative hypothesis is the stadium is not structurally sound," which type of error (Type I or Type II) would the engineer least like to commit?
given that f(x)=x^2+5x-5, find f(2)
Answer:
9
Step-by-step explanation:
for this problem, plug in 2 for every x
2^2 + 5(2) -5
4 + 10 -5= 9
Answer:
9
Step-by-step explanation:
plug 2 in whenever you see the x
Esmeralda's familyfamily went out to dinner paying a 20% tip at the end of the mill their credit card was charged $51 what was the amount when the bill without the tip?
Answer:
i dont know lol
Step-by-step explanation:
why you asking me
I WILL GIVE BRAINIEST ASAP IF ANSWERED ASAP
Answer:
56 degrees :)
Answer:
56 degrees
Step-by-step explanation:
the angle next to 76 degrees is a straight line so it is supplementary, meaning it is 104 degrees.
Because the two lines are parallel, and are cut through a transversal, the angle that we just found is actually equal to 48+x because of alternate interior angles. solving for x we get 104-48 = x
x=56
Mr.Green took a poll of 80 students to find out how they get to school.How many students in total ride the bus to school? 8 students,12 students,24 students,or 32 students?
Answer:
This problem needs more information.
Step-by-step explanation:
Which expression is equivalent to -6(-2/3 +2x)
Step-by-step explanation:
step 1. -6(-2/3 + 2x)
step 2. 12/3 + -12x. distributive property
step 3. 4 - 12x.
20% of 400 is what number
Simplify: (x1/2y3)6
A) x12y18
B) x12y9
C) x3y18
D) x3y9
A sewing project requires 6 1/8 yd of material that sells
for $4 per yard and 3 1/4 yd of material that sells for $3 per
yard. Choose the best estimate for the cost of the project:
a. Between $30 and $40
b. Between $20 and $34
c. Between $36 and $40
d. Between $33 and $40
The best estimate for the cost of the sewing project is between $30 and $40. Hence option 'a' is correct.
Use the concept of fraction defined as:
A fraction is a part of the whole number and a way to split up a number into equal parts. Or, A number which is expressed as a quotient is called a fraction.
It can be written as the form of [tex]p : q[/tex], which is equivalent to p / q.
Given that,
The sewing project also requires 3 1/4 yards of material selling for $3 per yard.
To calculate the cost of the sewing project:
Compute the cost of each type of material separately and then add them together.
For the first type of material:
We need [tex]6\dfrac{1}{8}[/tex] yards, which is equivalent to 6.125 yards.
The cost of this material would be,
6.125 x 4 = $24.50
For the second type of material:
We need [tex]3\dfrac{1}{4}[/tex] yards, which is equivalent to 3.25 yards.
The cost of this material would be,
3.25 x 3 = $9.75.
Now, add the costs of the two types of materials together:
$24.50 + $9.75 = $34.25.
Hence,
The cost of the project would be between $30 and $40,
Which is option a.
To learn more about the fraction visit:
https://brainly.com/question/5454147
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please help , thank youu
Answer:
9.) would be 89 and 10.) would be 1500 ft
Answer:
A. 89 B. 1200 ft
Step-by-step explanation:
A.
5(-4²)+9
5(16)+9
80+9
89
B.
-150+1350=
1200
A rectangular storage container without a lid is to have a volume of 10 m3. The length of its base is twice the width. Material for the base costs $15 per square meter. Material for the sides costs $9 per square meter. Find the cost (in dollars) of materials for the least expensive such container. (Round your answer to the nearest cent.)
Answer:
The least expensive cost = $245.32
Step-by-step explanation:
From the information:
Volume of the rectangular container = 10 m²
Assume the width of the container is = w
The base = 2 × width
= 2(w)
Volume = height × base × width
10 = h × 2w × w
[tex]h = \dfrac{10}{2w^2}[/tex]
[tex]h = \dfrac{5}{w^2}[/tex]
Now, to calculate the area of the base; we have:
[tex]Area = length \times width[/tex]
[tex]Area = 2w \times w[/tex]
[tex]Area = (2w^2) \ m^2[/tex]
[tex]Cost \ of \ base = 15 * 2w^2[/tex]
Cost of base = [tex]30w^2[/tex] --- (1)
[tex]Area \ of \ side = 2 ( height \times length ) + 2( height \times width) \\ \\ = 2 (h \times 2w) + 2(h\times w) \\ \\ = 4hw + 2hw \\ \\ = 6 hw \\ \\ = 6 \times \dfrac{5}{w^2} \times w \\ \\ Area = \dfrac{30 }{w} \ m^2[/tex]
Let's not forget that the cost of the sides = $9 per m²
Thus; the cost of the sides will be [tex]= \$ 9 \times \dfrac{30}{w}[/tex]
the cost of the sides [tex]= \dfrac{\$270}{w}[/tex]
Thus the total cost = cost of base = cost of sides
[tex]C(w) = 30w^2 + \dfrac{270}{w}[/tex]
By differentiation;
[tex]C'(w) = \dfrac{dC}{dw} \\ \\ = 30 \times 2w + 270 ( \dfrac{-1}{w^2}) \\ \\ C'(w) = 60 w - \dfrac{270 }{w^2} \\ \\[/tex]
[tex]\text{To determine the minimum cost:} \\ \\ C'(w) = 0 \\ \\ So, 60 w - \dfrac{270}{w^2}= 0 \\ \\ \text{By integrating w.r.t w} \\ \\ w ( 60 - \dfrac{270}{w^3}) =0 \\ \\ \implies 60 - \dfrac{270}{w^3} \\ \\ w^3 = \dfrac{270}{60} \\ \\ w^3 = \dfrac{9}{2} \\ \\ w = (\dfrac{9}{2})^{1/3} \\ \\ w = 1.6509 \ m[/tex]
From; [tex]C(w) = 30w^2 + \dfrac{270}{w}[/tex]
[tex]Cos t = \dfrac{30 w^3+ 270}{w} \\ \\ =\dfrac{30 (\dfrac{9}{2})+ 270}{1.6509} \\ \\ = \dfrac{135+270}{1.6509} \\ \\ = \dfrac{405}{1.6509} \\ \\ \mathbf{Cost = \$245.32}[/tex]
3x -3 = 2x
If you do this PLEASE could I have a THOROUGH explanation on how to do it!
Answer:
3x-3=2x, x=3
Step-by-step explanation:
so you want to move all the numbers with x to the left side of the equation
subtract 2x from both sides of the problem
3x-3-2x=0
subtract 2x from 3x
then add 3 to both sides of the equation
x=3
Solve each equation by taking square roots NEED THIS ASAP WILL GIVE BRAINLIEST
Answer:
#3. n = 1#5. x = 2Step-by-step explanation:
#3.
n x n - 5 = -4
n x n = 5 + -4
n x n = 1
n = 1
#5.
7x^2 + 1 = 29
7x^2 = 29 - 1
7x^2 = 28
x^2 = 28 / 7
x^2 = 4
x = 2
Hope that helps!
Surface area of a rectangular prism if W = 6in L = 9in and H = 2in
Answer:
Step-by-step explanation:
Two faces are 6” by 9”. Two faces are 6” by 2”. Two faces are 9” by 2”.
Surface are = 2*6*9 + 2*6*2 + 2*9*2 = 108 + 24 + 36 = 168 square inches
the trip took 1 hour and 40 minutes 30% of the time the car traveled on rough roads how much time did the car travel on rough roads?
A. 70 min B. 45 min C. 40 min D. 30 min
40.39 is what percent of 65?
A.60% B. 0.6% C. 39% D. 65%
Please help I need it now this is due ate 6:00 am please
Answer:
D
NOTE: 1 HOUR IS 60 MINUTES
do 60+40 gives u the minute which is 100
then 100 x30% = 30
NOTE: for the second round up the digit and multiply it by 65
so 40.4 x 65 gives 62. something
the nearest number is 60 % so 60% is the answer
Please mark as brainliest
Have a great day, be safe and healthy
Thank u
XD
Answer:
D
NOTE: 1 HOUR IS 60 MINUTES
do 60+40 gives u the minute which is 100
then 100 x30% = 30
Please mark as brainliest
Have a great day, be safe and healthy
Thank u
XD
Charlie wants to buy a new bike. The bike costs $125 and he has a coupon for a 20% discount. How much money will he get to save with the discount?
Answer:
He will get to save 25 dollars.
Step-by-step explanation:
percentage formula:
($125×20) ÷ 100
(2500) ÷ 100
= 25
Answer:25
Step-by-step explanation: because you divide 11by20 hthen you add in th ermaneder
Casey paod $32 for a book that was on sale at 20% off. WHat was the original prize for that book
Answer:
$38.4
Step-by-step explanation:
20%=0.20
32*0.20=6.4
32+6.4=38.4
Find the value of x.
143
2x° 152
116°
to
1259
140°
139°
Answer:85 degrees
Step-by-step explanation:
Formula for sum of interior angles is (n-2)180. Since there are 7 sides, n-2 is 5.
5 x 180 = 900
Add all the angles given and subtract sum from 900 and you are left with 85 for the missing angle.
Please help ASAP I have no idea
Answer:
73.4
Step-by-step explanation:
I’m 96% sure this is the answer
A researcher plans to conduct a test of hypotheses at the 1% significance level. She designs her study to have a power of 0.90 at a particular alternative value of the parameter of interest. What is the probability that the researcher will commit a Type II error for the particular alternative value of the parameter at which she computed the power
Answer:
P(Type II error) = 0.1
Step-by-step explanation:
In statistics, the formula for power of a hypothesis is given by;
Power = 1 - P(Type II error)
Where P(Type II error) is the probability of making a Type II error.
We are told that the power is 0.9.
Thus;
0.9 = 1 - P(Type II error)
Making P(Type II error) the subject gives;
P(Type II error) = 1 - 0.9
P(Type II error) = 0.1
Choose the correct simplification of (4x − 3)(3x² − 4x − 3).
Answer: 12x^3−25x^2+9
^ are the exponents
Step-by-step explanation:
i think the answer is 3x^2-x
CHECK IMAGE Help me out pretty please
If we are missing the percent, then what
will go over 100 in the percent proportion?
Answer:
the percentage that you are trying to find
for ex if you were trying to figure out how to find 4.5 % thank you would put the over 100% and then divide it.
Step-by-step explanation:
What type of study is described? (NOT A MULTIPLE CHOICE)
a. Managers of a forest preserve want to know what percent of the visitors with dogs keep their dogs on a leash. The park assigns an employee to count the numbers of visitors that do and do not use a leash.
b. A local newspaper polls citizens of a city about whether they support a local tax levy?
Answers:
a) Observational Studyb) Survey===========================================================
Explanation:
Part (a)
We have an observational study because the park ranger is observing the people coming and going, as to whether they leash their dog or not. The people being counted are not asked to fill out a form or survey, so that's why we aren't conducting a survey here.
Ideally, the park ranger should somehow make a visual note of each person so they do not count that person more than once. For example, let's say we had 500 people go through the park. Of that 500, the true number of people who leash their dogs is 20. I don't know what the true percentage is, but let's just go with this hypothetical situation. If those 20 people pass back and forth where this manager is taking note, then he might overcount some individuals and inflate that 20 to say 40 or 60, or perhaps even 100. This is if the ranger doesn't look at the individuals closely and simply marks a tally for "leash" vs "no leash". So that's why there needs to be some quick method to distinguish between any unique guest of the park.
--------------------------------
Part (b)
In contrast to part (a), we have a survey here this time. Each person is asked directly about a specific narrow well defined question. The newspaper reporter isn't going out into the field to simply watch or listen to people discuss about taxes, so that's why we don't have an observational study going on. The reporter should try to keep the question as bias-free as possible. Also, they need to ensure that the sample is representative of the population.
In neither part (a) nor part (b) is an experiment being done. An experiment requires two groups: a treatment group and control group. Also, the researcher would directly affect the treatment group to somehow change one specific aspect, while keeping the control group the same (though possibly giving a placebo of some kind). For each of these, the researcher is simply trying to stay out of the picture as much as possible while gathering the external data.
Hii, Ok so basically I really need help with these questions they are really difficult and don't worry rewards are plenty a come. On the last question whoever give the right answer and is the quickest will get brainliest. But do not worry whoever answers this question will get a
1. Thank you *heart*
2. 5 star rating
3. Comment
So you may be wondering what the question is well take a look oh and by the way please do not give a random answer and its a maths question
Given that angle A = 284 degrees, work out x
A triangle can have sides of length 7, 9, and 18.
true
false
Answer:
That is false.
The sum of any two sides in a triangle must be greater than the length of the third side.
We can see that: 7+9 = 16, and 16 is not greater than 18.
So, this is not a triangle.
Let me know if this helps!
You start driving north for 16 miles, turn right, and drive east for another 30 miles. At
the end of driving, what is your straight line distance from your starting point?
Answer: The distance between starting and ending point is 34 miles.
Can someone help me with number 3 please
1. 5, 10, 15, 20.....
a. Rule:
b. Next three:
2. 1.3, 1.5, 1.7, 1.9....
a. Rule
b. Next Three
Answer:
1. a) rule is that it adds 5 every time
1.b) 25, 30, 35
2.a) rule is that it adds 0.2 every time
2.b) 2.1, 2.3, 2.5