Answer: 60.93 < μ < 69.07
Step-by-step explanation: The true mean of a set of data is between an interval of values with a percentage of precision, e.g., a 99% confidence interval means we are 99% confident the true mean is between the lower and upper limits.
To find the interval, use
x±[tex]z\frac{s}{\sqrt{n}}[/tex]
z is z-score related to the % of confidence level
In this case, a 99% confidence interval is 2.576
x is sample mean
Calculating:
[tex]x=\frac{63+69+62+66}{4}[/tex]
x = 65
65±[tex]2.576\frac{3.16}{\sqrt{4}}[/tex]
65±4.07
Confidence Interval: 60.93 < μ < 69.07
Meaning that we are 99% sure the population means is between 60.93 and 69.07.
2 Dylan is part of a volunteer crew constructing houses for low-income families. Dylan is experienced at installing tile floors. He is training a new volunteer, George, to complete tiling projects. A new job involves placing 100 tiles. Dylan knows from experience that it would take him 2 hours to complete the job if he were working alone. Dylan estimates that it would take George 4 hours to complete the job if George were working alone. If Dylan and George work together, how long will it take to complete the job?
Answer:
For the tiling Job; it takes the following for installing 100 tiles:
Dylan =2 hours
George = 4 hours
if they work together for the job, for 1 hour,
it would be the following no of tiles to be fixed:
Dylan + George = total tiles
100/2 + 100/4 = 50 + 25 = 75 tiles
If it takes George 1hr to fix 50 tiles,
For 30 minutes, Dylan will fix 25 tiles
Therefore Total tiles fixed = Dylan(1hr work) + George(1hr work) + Dylan (30mins work)
= 50 tiles + 25 tiles + 25 tiles = 100 tiles
Therefore, it will take approximately 1 hour for them to install 75 tiles in the low-income house for the families or
1.30 hours (1 hr, 30 minutes) to fix 100 tiles for the same low income families.
Step-by-step explanation:
A popular ride-sharing app charges an
initial booking fee plus $1.30 per mile. If a
14-mile ride costs $21.20, what is the booking
fee?
Answer:
2.20
Step-by-step explanation:
2.20
please help calculus question urgent
Answer:
C
Step-by-step explanation:
We are given that:
[tex]\displaystyle k(x)=\frac{f(x)}{g(x)}[/tex]
And we want to find k'(3).
So, let's find k'(x). Take the derivative of both sides. This will require the Quotient Rule. Hence:
[tex]\displaystyle k^\prime(x)=\frac{f^\prime(x)g(x)-f(x)g^\prime(x)}{(g(x))^2}[/tex]
We want to find k’(3). Substitute:
[tex]\displaystyle k^\prime(3)=\frac{f^\prime(3)g(3)-f(3)g^\prime(3)}{(g(3))^2}[/tex]
Using the table, make the appropriate substitutions:
[tex]\displaystyle k^\prime(3)=\frac{5(2)-(-1)(-2)}{(2)^2}[/tex]
Evaluate:
[tex]\displaystyle k^\prime(3)=\frac{10-2}{4}=\frac{8}{4}=2[/tex]
Therefore, our answer is C.
What did I do wrong??
Help come on plzz will give brainliest
Answer:78.4
Step-by-step explanation:
(74+44+74+100+98+86+72+76+66+94)/10 = 78.4
GIVING OUT BRAINLIEST TO FIRST ✅CORRECT✅ ANSWER
Answer:
1,-5 and -1,-3
Step-by-step explanation:
write an equation of the line that passes through (-1,3) and is parallel to the line y=2x+2
Answer:
y = 2x + 5
Step-by-step explanation:
y - 3 = 2( x + 1 )
y = 2x + 5
the product of the first 3 terms of a G.P is 1000 if we add 6 to its second term and 7 to its third term the three forms an A.P .find the terms of G.P
Answer:the product of the first 3 terms of a G.P is 1000 if we add 6 to its second term and 7 to its third term the three forms an A.P .find the terms of G.P
Step-by-step explanation:
the product of the first 3 terms of a G.P is 1000 if we add 6 to its second term and 7 to its third term the three forms an A.P .find the terms of G.P
Answer:
What grade is this?
-by-step explanation:
When looking at a graph of a system of equations,
where can I find the solution(s) to the system?
Answer:
to solve a system of linear equations graphically we graph both equations in the same coordinate system, the solution to the system will be in the point where the 2 lines intersect.
19g - 4h + 4 - 20(g - 1)
Can you plss help me
Answer:
I think its A
Step-by-step explanation:
correct me if im wrong
A six-digit password is picked from the numerals 0 - 9. How many different passwords are possible if no number is repeated?
Answer:The answer is 600.
Step-by-step explanation:
If you cant tell I hate percents :)
A group of friends went to lunch. Click on all the correct answers below according to the Letters A, B, and C.
A Their original bill cost $50.00, but they had a coupon for 20% off their meal. Find the discounted price (before tax and tip).
B A sales tax of 7% was added. What was the total amount including sales tax?
C The group chose to tip 20%. What is the total amount that their bill cost including tax and tip?
What is common monomial factor of 10x2+10?
Answer:
10
Step-by-step explanation:
10x2+10
=10（2x+1)
A group of scientists studied the amount of erosion at a beach. The scientist determined that the equation y=-0.5x+26 models the amount of shoreline,y,in feet,x decades after 1950.What state is true based on the model?
Answer:
Try A
Step-by-step explanation:
The shoreline is reduced by 0.5 feet every 10 years. Then the correct option is A.
What is a linear equation?A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
The linear equation is given as,
y = mx + c
Where m is the slope of the line and c is the y-intercept of the line.
A group of scientists studied the amount of erosion at a beach. The scientist determined that the equation is given below.
y = -0.5 x + 26
The shoreline is reduced by 0.5 feet every 10 years. Then the correct option is A.
More about the linear equation link is given below.
https://brainly.com/question/11897796
#SPJ2
4x/5-5/2x^8 এর বিস্তৃতিতে শেষের তৃতীয় পদ নির্ণয়
Answer:
Fr dude-
Step-by-step explanation:
What does that even say Imaaoo
Welp if you wanted me to write that in standard form then here ya go:
please solve in detail
Answer:
x = 4
Step-by-step explanation:
the explanation is in the images
is 3 x 5/6:
A: 15/6
B:15/18
????
Answer:
3 x 5/6 is 2.5, so 15/6
Step-by-step explanation:
3/1 x 5/6
Answer:
A, 15/6
Step-by-step explanation:
there are 3 rows of pictures on a wall. each row has 6 pictures. how many pictures are on the wall
Answer:
There are 18 pictures on the wall
Step-by-step explanation:
6 x 3 = 18
there is no way that simple multiplication is college level.
May I have brainliest please? :)
Need HELP RUNNING OUT OF TIMe :)
Find the number.
the sum of the reversed number and the original number is 154. Find the original number, if the ones digit in it is 2 less than the tens digit.
Answer:
86
Step-by-step explanation:
Let the number be 10x + y. So, the reversed number is 10y + x.
The sum is 154.
So, (10x + y) + (10y + x) = 154
⇒ 11x + 11y = 154
⇒ x + y = 14 ..... (1)
Again, given that ones digit in the original number is 2 less than the tens digit.
So, y = x - 2 ...... (2)
Now, solving (1) and (2) we get,
x + x -2 = 14
⇒ 2x = 16
⇒ x = 8
So, from equation (2), y = x - 2 = 8 - 2 = 6
Therefore, the original number is 10x + y = 10 × 8 + 6 = 86 (Answer)
Help again gonna mark soemone brainliest
Answer: The answer is C
Step-by-step explanation:
Because i did that question before.
Answer:
i think the answer is c or a
(y + 2)(y^2 - 2y + 3)
Answer:
y^3 - y + 6
Step-by-step explanation:
I believe this is right
Solve for u.
-24 = u ÷ 6
(20 POINTS!!!!) Terry realized that 25% of his money was $12.50. He made a double number line to represent this. What number would go in the first missing box?
Step-by-step explanation:
try 12.50x25% i think
Answer:
25.00 and 50
Step-by-step explanation:
if a person is randomly selected from the US population, the odds the person lives in California are 1 to 8.
What is the probability of two decimal places of a randomly chosen person being from California?
What are the odds of a randomly chosen person not being from California?
Answer:
The probability of a randomly chosen person being from California is 0.111.
The probability of a randomly chosen person not being from California is 0.889.
Step-by-step explanation:
The odds of a person, selected from the US population, living in California is 1 to 8.
That is:
[tex]\text{Odds}(\frac{\text{Lives in California}}{\text{Does not Lives in California}})=\frac{1}{8}[/tex]
Compute the probability of a randomly chosen person being from California as follows:
[tex]P(\text{Lives in California})=\frac{\text{Odds}(\text{Lives in California})}{\text{Odds}(\text{Lives in California})+\text{Odds}(\text{Does not Lives in California})}[/tex]
[tex]=\frac{1}{1+8}\\\\=\frac{1}{9}\\\\=0.111[/tex]
The probability of a randomly chosen person being from California is 0.111.
Compute the probability of a randomly chosen person not being from California as follows:
[tex]P(\text{Love in California})=1-P(\text{Does not Love in California})[/tex]
[tex]=1-0.111\\\\=0.889[/tex]
Thus, the probability of a randomly chosen person not being from California is 0.889.
Question on square roots!!! Please help
Answer:
D
i took a test that had a question that was the same
How many exact tenths are in 21.34. Why is it not 3?
Answer:
213.4 tenths
Step-by-step explanation:
It's not 3 probably because the question is asking how many tenths are in the whole number, and not just one section. So, there would be 213.4 tenths.
(Im giving brainliest and extra points on this one :D)
Solve six and two sixths times one and one half.
A) six and two twelfths
B) eight and six twelfths
C) nine and six twelfths
D) ten and two twelfths
Answer:
C
Step-by-step explanation:
Convert to improper fraction and multiply them, then convert back to mixed fraction :)
Answer:
C . The answer can be simplified but its not on here for some reason.
Step-by-step explanation:
6 2/6 x 1 1/2
(6 x 6) + 2 = 38/6
(1 x 2) + 1 = 3/2
38/6 x 3/2 = 114/12
114 ÷ 12 = 9 6/12.
9 6/12 = 9 3/6 = 9 1/2.
C
Again it can be simplified buts it not on here for some reason.
Which car has the best gas miles Car A 150 miles on 12 gallons or Car B 80 miles on 6.5 gallons
Answer:
kdtgufkgcvkmj
Step-by-step explanation:
Answer:
Car A
Step-by-step explanation:
We need to find the miles per gallon for both cars
So we divide the miles by the gallon
Car A: 150 ÷ 12 = 12.5 mpg
Car B: 80 ÷ 6.5 = ~12.3 mpg
The answer is Car A
Suki split five dog treats equally among her six dogs. Which fraction represents this division?
Answer Quick!!!
Answer:
5/6
Step-by-step explanation:
There are 5 dog treats among 6 dogs, so we divide 5 by 6 to get 5/6 of a treat.
cloud is a vegetable grower, has 8 4/15 plots of pechay, 5 1/3 plots of eggplants and 5 2/5 of okra . how many plots of vetable do cloud has?
Answer:
The total plots of vegetable cloud will have: 19
Step-by-step explanation:
As the cloud has:
[tex]8\frac{4}{15}[/tex] plots of pechay[tex]5\frac{1}{3}[/tex] plots of eggplants[tex]5\frac{2}{5}[/tex] plots of okaraSo, the total plots of vegetable cloud will have:
[tex]8\frac{4}{15}+5\frac{1}{3}+5\frac{2}{5}[/tex]
[tex]=\frac{124}{15}+\frac{16}{3}+\frac{27}{5}[/tex]
[tex]=\frac{124}{15}+\frac{80}{15}+\frac{81}{15}[/tex]
[tex]=\frac{124+80+81}{15}[/tex]
[tex]=19[/tex]
Therefore, the total plots of vegetable cloud will have: 19