Answer:
no not me I have a size 7 .how about you
A long history of testing water samples in a certain lake has shown that the level of a certain pollutant is approximately normally
distributed with standard deviation 4.5 mg/L. What is the minimum number of samples required to estimate today's level to within 0.4
mg/L with 95% confidence? (Don't forget to round Zc to two decimal places!)
Answer:
The minimum number of samples required is 487.
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 - 0.95}{2} = 0.025[/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 - 0.025 = 0.975[/tex], so Z = 1.96.
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.
Standard deviation 4.5 mg/L.
This means that [tex]\sigma = 4.5[/tex]
What is the minimum number of samples required to estimate today's level to within 0.4 mg/L with 95% confidence?
This is n for which M = 0.4. So
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
[tex]0.4 = 1.96\frac{4.5}{\sqrt{n}}[/tex]
[tex]0.4\sqrt{n} = 1.96*4.5[/tex]
[tex]\sqrt{n} = \frac{1.96*4.5}{0.4}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.96*4.5}{0.4})^2[/tex]
[tex]n = 486.2[/tex]
Rounding up
The minimum number of samples required is 487.
How to write -x^2+12-8x=-3 in standard form
Answer:
-x^2-8x+15=0
Please mark as brainliest
Answer:
give me a min if you can
Step-by-step explanation:
A plane is flying at an altitude of 300 meters on a heading
towards both a maintenance hangar and the main runway.
The pilot sights the end of the main runway at
an angle of depression of 15°. She then sights the
maintenance hangar at an angle of depression
of 32°. What is the distance between the end of
the main runway and the maintenance hangar?
Lines that appear to be tangent are tangent. O is the center of the circle. What is the value of x?
Answer:
hammood habbi knows
Step-by-step explanation:
32 or 16
Match each term with its notation.
___________ The number of treatment conditions
___________ The number of scores in each treatment.
___________ The total number of scores in the entire study.
___________ The sum of the scores for each treatment condition.
___________ The sum of all of the scores in the research study.
___________ The F-ratio
1. n
2. F
3. G
4. N
5. k
6. T
Answer:
_k_ The number of treatment conditions
_n_ The number of scores in each treatment.
_N_ The total number of scores in the entire study.
_T_ The sum of the scores for each treatment condition.
_G_ The sum of all of the scores in the research study.
_F_ The F-ratio
Step-by-step explanation:
These notations are ANOVA (Analysis of variance) notations, where
k is the number of treatment conditions
n is the number of scores in the treatment
N is the total number of scores in the entire study
T is the sum of scores for a specific treatment
G is the sum of all scores in the study
and F is the F-ratio.
Now, for the question, we will match each term with its notation
_k_ The number of treatment conditions
_n_ The number of scores in each treatment.
_N_ The total number of scores in the entire study.
_T_ The sum of the scores for each treatment condition.
_G_ The sum of all of the scores in the research study.
_F_ The F-ratio
40 pts please help! picture below!
Answer:
B. 135
Step-by-step explanation:
CB is 45
AB= half of circle or 180*
So, 180-45=135
Therefore, the answer is 135* or b
hope this helps
Answer:
135 degrees
Step-by-step explanation:
Since the angle is measured from the center, the arc is the same as the angle measurement.
ACB = 180
AC + CB = 180
AC + 45 = 180
AC = 180-45 = 135
Which shape is the base of the pyramid shown below?
A triangle
B square
Answer:
B. it's a square pyramid so the base is a square.
Step-by-step explanation:
An in-ground pond has the shape of a rectangular prism. The pond has a depth of 24 inches and a volume of 72,000 cubic inches. The length
the pond is two times its width.
Find the length and width of the pond to the nearest tenth.
Answer:
Should be
Width: 38.7
Length: 77.5
Please give me Brainliest and like
Twenty percent of 56 is 11.2
TRUE OR FALSE
FIRST TO ANSWER GET THE POINTS AND IM GONNA GIVE HIM A BRAINLIEST ANSWER. ORRRAYT
Which number is a multiple of 7? A 27 B 48 C 56 ET D 74
Answer:
C. 56
Step-by-step explanation:
7*8=56
PLS HELP DUE SOON SHOW YOUR WORK!
9514 1404 393
Answer:
615.8 square feet9 truckloadsStep-by-step explanation:
The area of the circular ring is given by the formula ...
A = πr²
where r is the radius, or half the diameter.
A = π(14 ft)² = 196π ft² ≈ 615.752 ft²
The area of the training area is about 615.8 square feet.
__
The number of truckloads of dirt required for coverage will be ...
(615.8 ft²)/(75 ft²/truckload) ≈ 8.21 truckloads
Since the dirt comes only in whole truckloads, Hilary needs 9 truckloads.
PLEASE HELP, 80 POINTS!!!!
1. Write as a function of an acute angle. sec(11 pi/4)
A): sec45
B): -sec45
C): -sec(-45)
D): sec(-45)
2. If cot0=5.671, find a point on the terminal side of 0.
A): (5.671, 1)
B): (1, 5.671)
C): (5.671, -1)
D): (-1, 5.671)
3. Convert to degrees. 2^R
A): 360
B): 180
C): 114.592
D): 1.570
Answer:
I think it's
1. C
2. B
3. A
Step-by-step explanation:
How does the graph of g(x) = 10x – 8 compare to the graph of f(x) = 10x?
The graphs are the same.
The graphs are translated upward 8 units.
The graphs are translated downward 8 units.
The graphs shift to the left 8 units.
Answer:
Translated down 8 units or C
Step-by-step explanation:
22, 17. 12, 7... O Arithmetic
O Geometric
O Neither
3|2z-4|-6>12
Solve for z
Answer:
312z-41-6>12
subtract -41-6
312z-47>12
add it on both sides
312z-47>12
+47 +47
312z>59
divide 312 to both sides
z<0.189
Answer:
can someone help me pls i dont know 2x=4=
Step-by-step explanation:
Wanda drove 392 miles in 14 hours. What is her unit rate of miles per hour?
Which is a function?
O {(-3,5), (1,4), (3,7), (1,7), (4,9)}
O {(7.9), (13,-2), (8,4), (7,0), (4,12)}
O {(2,1), (-1,7), (6,-2), (10,3), (-6,0)}
O {(-2,4), (7,4), (-6,8), (-2,8), (1,1)
50000000000000000000000000000000000000000000
Answer:
{(7.9), (13,-2), (8,4), (7,0), (4,12)} is a function
Step-by-step explanation:
2. (MCC 6.5) Find the value of x. 77° (6x17)°
Answer:
x = 17
Step-by-step explanation:
77° + (6x + 1)° = 180° (angels on a straight line)
Solve for x
77 + 6x + 1 = 180
Add like terms
6x + 78 = 180
6x + 78 - 78 = 180 - 78
6x = 102
6x/6 = 102/6
x = 17
PLEASE HELP I WILL MARK
BRIANLIST Caitlin has $24 to spend. She spent $8.50, including tax, to buy a book. She needs to save $6.25, but she wants to buy some candy. If each piece of candy costs $0.25 including tax, what inequality would show the maximum number of pieces Caitlin can buy? Let x represent the cost of one piece of candy.
Solve your inequality by showing your work and steps.
Answer: 37 pieces of candy
Step-by-step explanation:
24-8.50 is 15.50 she wants to save 6.25, so, 15.50-6.25 is 9.25. 9.25 divided by the cost of each candy (0.25) is 37
Eli gave out a survey to some students in his school about their favorite color. 880 of those surveyed said their favorite color was red. If 88% of the students surveyed said their favorite color was red, how many students were surveyed in total?
Answer:
The answer is 1000.
Step-by-step explanation:
Ayoooo somebody please help me! 20pointss
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!
Answer:
Your answer would be B
Step-by-step explanation:
a way to remember it is:
a food web= think of a spiders web and how it goes multiple waysa food chain= think of a metal chain, they only link on one another and go only on direction or pathWhat is the median of the data represented by the box plot?
enter your answer in the box
Answer:
[tex]Median= 20[/tex]
Step-by-step explanation:
Given
The attached box plot
Required
The median
The median is represented by the vertical line inside the rectangle on the box plot.
Using the description above to read the median from the given box plot.
[tex]Median = 20[/tex]
It is also the same as the second quartile
If you wanted to put a fence around your garden, would you find the perimeter or the area of the garden??
Answer:
U would find the perimeter.
Step-by-step explanation:
Which statement is true
Answer:
D
Step-by-step explanation:
hey man. trust me. quack
Answer:
i think that the answer might be d
ILS.
Carnival visitors
50
70
90
110
130
150
What fraction of the days did the carnival have 70 or fewer visitors?
Submit
Answer:
its 1/4 :)
Step-by-step explanation:
After observing the number of visitors, the fraction of the days that the carnival has 70 or fewer visitors is 1/3.
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 fraction.
It can be written in the form of p:q, which is equivalent to p / q.
Given that,
There are 2 days with 70 or fewer visitors.
To find the required fraction,
Determine how many days out of the given total had 70 or fewer visitors.
Since there are 2 days with 70 or fewer visitors,
To calculate the fraction,
Divide the number of days with 70 or fewer visitors (2) by the total number of days (6).
So, the fraction is 2/6.
Simplifying this fraction yields 1/3.
Hence, the required fraction is 1/3.
To learn more about the fraction visit:
https://brainly.com/question/5454147
#SPJ4
peggy drives for 3 hours at an average speed of 61 miles per hour. Then when she crosses over into the next state she is able to drive the next 2.5 hours at an average speed of 72 miles per hour.
what was her average speed for the entire trip?
Answer:
65 miles per hour
Solve the system of equations and choose the correct answer from the list of options. d + e = 15 −d + e = −5 Label the ordered pair as (d, e). (4 points) Question 3 options: 1) (0, 0) 2) (10, −5) 3) (5, 10) 4) (10, 5)
Answer:
3) (5, 10)
Step-by-step explanation:
d + e = 15
-d + e = -5
e = -5 + d
substitude e for -5 + d
d + -5 + d = 15
2d = 10
d = 5
figure out e
5 + e = 15
e = 10
If x=2 and y=5 Evaluate this expression: 6x +5 y
Answer:
12 + 25 = 37
Step-by-step explanation:
If we have the value for each of the variables, we can plug them in, and be done with it.
when we plug them in, we get
6(2) + 5(5)
12 + 25
37
Could use help on this please. No wrong answers! I NEED to get an A on this otherwise I'll have to literally repeat the year.
Answer:
blank 1: 0.75b
black 2: 2/5p