The sample size for the part (a) is 269, and the sample size for part (b) is 191 if a margin of error of 5 percentage points and use a confidence level of 90%
What is the margin of error(MOE)?It is defined as an error that gives an idea about the percentage of errors that exist in the real statistical data.
The formula for finding the MOE:
[tex]\rm MOE = Z{score}\times\frac{s}{\sqrt{n} }[/tex]
Where is the z score at the confidence interval
s is the standard deviation
n is the number of samples.
We have:
MOE = 5% = 0.05 and
[tex]\alpha = 1-0.9 \Rightarrow 0.1[/tex]
Let's assume the value of p = 0.5, and q = 0.5
From the table:
[tex]\rm Z_{\alpha/2}\Rightarrow Z_{0.1/2}\Rightarrow Z_{0.05}\Rightarrow 1.64[/tex]
[tex]\rm n = p\times q \frac{Z^2_{\alpha/2}}{MOE^2}[/tex]
[tex]\rm n = 0.5\times 0.5\frac{1.64^2}{0.05^2}[/tex]
n = 268.96 ≈ 269
For part(b)
The value of p = 0.23, and q = 0.77
From the table:
[tex]\rm Z_{\alpha/2}\Rightarrow Z_{0.1/2}\Rightarrow Z_{0.05}\Rightarrow 1.64[/tex]
[tex]\rm n = p\times q \frac{Z^2_{\alpha/2}}{MOE^2}[/tex]
[tex]\rm n = 0.23\times 0.77\frac{1.64^2}{0.05^2}[/tex]
n = 190.53 ≈ 191
Thus, the sample size for the part (a) is 269, and the sample size for part (b) is 191 if a margin of error of 5 percentage points and use a confidence level of 90%
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PLEASE HELP PLEASE PLEASE
Answer:
4 degrees is the closest thing i could think of while looking at this.
Pls help give brainlest
Answer:
problem 18=E
problem 20= 135
problem 19= 14
problem 21= -2
problem 22= 0.5
Please help me understand the question
Answer:
a and c
Step-by-step explanation:
find the value of angle BAC
Answer:
The value of angle BAC = 75°
Step-by-step explanation:
=> Angle BAC + 105° = 180°
=> Angle BAC = 180° - 105°
=> Angle BAC = 75°
For each of the following expressions, identify the base and the exponent. 2× ,10² , x×
Answer:
2 is the base, 10 is the base, and x is the base. X is the exponent of 2, x is the exponent of 10, and x is the exponent of x.
Step-by-step explanation:
A plane travels at a speed of 205mph in still air. Flying with a tailwind, the plane is clocked over a distance of 550 miles. Flying against a headwind, it takes 1
hour longer to complete the return trip. What was the wind velocity? (Round your answer to the nearest tenth.)
Answer:
55.5 mph
Step-by-step explanation:
Time period of flight
Distance travelled / Speed of plane550 miles / 205 mph2.68 hoursReturn trip flight speed
Distance travelled / Time taken550 miles / 2.68 + 1 hours550 miles / 3.68 hours149.46 mphWind velocity
Original speed - Speed on return trip205 - 149.4655.5455.5 mphX + 10 <14
thank you!
Answer:
x < 4
Step-by-step explanation:
Subtract 10 from both sides.
x + 10 - 10 < 14 - 10
Simplify the arithmetic:
x < 14 - 10
Simplify again..
and then u get x < 4
hope this helps <33
Two binomials that have a product of y^2 - 1
Answer:
(y-1) x (y+1)
Step-by-step explanation:
Write the number in the exponential
form with an exponent of 2
Use a² - b² = (a - b)(a +b) to factor the expression
What is the vertex of angle 1
Answer:
b
Step-by-step explanation:
Answer:
i believe it be
Step-by-step explanation:
correct me if its wrong
100 POINTS
What is the best name of the solid that can be formed by this net?
A. cube
B. cylinder
C. rectangular prism
D. square prism
Answer: rectangular prism
Step-by-step explanation:
Answer:
rectangular prism
Step-by-step explanation:
Allie has a round tablecloth with a radius of 2 meters. What is the tablecloth's circumference?
please help!!!!!!!!!!!!!!!
Answer:
There are 8 oz of soup per can : True
In 8 cans, there are 21 oz of soup : False
There are 2 oz of soup in 16 cans : False
In 1/8 of a can, there is 1 oz of soup : True
Step-by-step explanation:
To start, we know we have 168 oz of soup and 21 cans that are all the same size. To find how much is each can, (We know that they will all have the same amount since it says equally sized cans.) we can simply divide the amount we have of soup in oz by the amount of cans we have.
168 / 21 = 8.
This means that all the cans will be filled with 8 oz of soup. Making the first statement true.
Since there are 8 oz in each can, we can do 8 cans * 8 oz to find how many oz are in 8 cans of soup.
8 * 8 = 64 oz.
There are 64 oz of soup in 8 cans. Making the second statement false.
Now again, since there are 8 oz in each can, we can do 16 cans * 8 oz to find how many oz are in 16 cans of soup.
16 * 8 = 128 oz.
There are 128 oz of soup in 16 cans. Making the third statement false.
For the last question, to find 1/8 of a can of soup, we can take 8 oz (8 oz in one can) and divide it by 8.
8/8 = 1
Meaning 1/8 of a can of soup is 1 oz of soup. Making the fourth statement true.
You are training your dog to catch a frisbee. You are playing in a large field, and you are standing next to your dog when you throw the frisbee. If the path of the frisbee is y = –x2 + 8x + 7 and the path of the dog is modeled by y = 2x + 7, will the dog catch the frisbee? If so, what are the coordinates of the point or points where they meet?
Yes, they intersect at the coordinates (0, 7) and (3, 13)
Yes, they intersect at the coordinates (0, 7) and (6, 19)
Yes, they intersect at the coordinates (0, 7) and (7, 21)
No, the paths do not cross
Answer:
Yes, they intersect at the coordinates (0, 7) and (6, 19)
Step-by-step explanation:
[tex]y = -x^2 + 8x + 7\\y = 2x + 7\\y = y\\-x^2 + 8x + 7 = 2x + 7\\-x^2+ 6x = 0\\x^2 - 6x = 0\\x(x - 6) = 0\\x = 0\ \ \text{or}\ \ x = 6\\[/tex]
[tex]\text{if}\ x = 0\\y = 2x + 7\\y = 2(0) + 7 = 7\\\text{coordinate is:}\ (0, 7)[/tex]
[tex]\text{if}\ x = 6\\y = 2x + 7\\y = 2(6) + 7 = 12 + 7 = 19\\\text{coordinate is:}\ (6, 19)[/tex]
Answer:
B. Yes, they intersect at the coordinates (0, 7) and (6, 19)
Step-by-step explanation:
I took the Algebra exam
What is the approximate volume of the sphere shown?
r= 13 inches
o 527 cubic inches
o 7327 cubic inches
o 2,9297 cubic inches
0 2,1977 cubic inches
< Previous
Answer:
2,197 is D
Explanation:
4/3 * 3.14 * 13^3 =
2,197
find the volume please thanks
answer:
volume= lwh
= 20*12*8
= 1920 cm³
This exercise uses Newton's Law of Cooling.
Newton's Law of Cooling is used in homicide investigations to determine the time of death. The normal body temperature is 98.6°F. Immediately following death, the body begins to
cool. It has been determined experimentally that the constant in Newton's Law of Cooling is approximately k - 0.1947, assuming time is measured in hours. Suppose that the
temperature of the surroundings is 60°F.
(a) Find a function TCC) that models the temperature t hours after death.
TL)
х
(6) If the temperature of the body is now 78°F, how long ago was the time of death? (Round your answer to the nearest whole number.)
Xhr
By applying the Newton's law of cooling and performing the neccessary calculations, the time of death of the body is about 4 hours ago.
Newton's law of coolingAccording to the Newton's law of cooling;
T(t) = T(s) + (To - Ts)e^-kt
T(t) = temperature at time t
T(s) = temperature of the surroundings
To = Initial temperature
k = cooling constant
t = time taken
Substituting the values;
T(t) = 60 + (98.6 - 60)e^- 0.1947t
To find the time taken to attian a temperature of 78°F;
78 = 60 + (98.6 - 60)e^- 0.1947t
78= 60 + 38.6e^- 0.1947t
78 - 60 = 38.6e^- 0.1947t
18/38.6 = e^- 0.1947t
0.466 = e^- 0.1947t
ln0.466 = lne^- 0.1947t
ln0.466 =- 0.1947t
t = ln0.466 /- 0.1947
t = 4 hours
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HELPPPPPPPPPPPPPPPPP AGIANNNNNNNNNNNNNNN
Help help help help math
Answer:
x = 6
Step-by-step explanation:
(4x - 3) × 2 = 3(x + 8)
8x - 6 = 3x + 24
8x - 3x = 24 + 6
5x = 30
x = 6
Willie runs 4 miles in 44 minutes. If Willie runs at the same rate, how many miles can he run in 66 minutes?
Answer:
6 miles in 66 mins
Step-by-step explanation:
4 miles = 44 mins
simplify to the lowest point
1 mile = 11 mins
? = 66 mins
? = 1 x 6
you can run 6 miles in 66 mins
Answer:
Step-by-step explanation:
4/44= 0.0909090909...*66=6
find the propotunate value by dividing each initial value and multiply it by the listed secondary value
Which is the BEST description of the data in the scatterplot?
Answer:
2. linear with a negative correlation
1. [15 points] An electric company makes motors for a variety of applications. Its two plants ship their production to three dealers. The production hours available in the plants for the second quarter vary because of downtime for scheduled maintenance on equipment: Plant April May June A 400 360 360 B 425 350 375 Plant A requires 20 hours to produce a motor. Plant B requires 25. Because B is older and less efficient, production costs are $100 more per motor in B than in A. Shipping costs from the plants to the dealers and orders for the quarter are show below Monthly Shipping orders costs from Dealer April May June A B 1 12 9 11 45 60 2 10 12 8 50 70 3 8 11 12 75 40 Building ahead and stockpiling of motors is possible with a cost of $55 per month. Orders that are not shipped in the month requested are subject to a contractual penalty of $80 per month. At the end of June all orders need to be satisfied. Formulate an LP problem that can determine a production schedule to meet the demands for the motors with the minimum total of shipping, storage, penalty and production differential costs.
The graph shows the vertical position of a ball attached to a spring oscillating between a low point and a high point as a function of time.
Select all statements that describe the graph.
The amplitude is 24 cm.
The ball travels 24 cm in 1 s.
It takes the ball 2 s to complete a cycle.
The midline is at f(x)=0.
Step-by-step explanation:
The statements that describe the graph are,
The ball travels 24 cm in 1s.
It takes the ball 2s to complete a cycle
The midline is at f(x)=0
I hope it helped you
For the pair of functions, find the quotient (f/g)
What is the sum of the
greatest common factor and the least common
multiple of 4 and 10?
A 18
B 20
C 22
D 24
Answer:
C
Hope This Helps! :) Please Give Brainliest if this does!
Select the correct answer from each drop-down menu.
The general form of the equation of a circle is 7x2 + 7y2 − 28x + 42y − 35 = 0.
The equation of this circle in standard form is
. The center of the circle is at the point
, and its radius is
units.
Step-by-step explanation:
[tex](x - 2) {?}^{2} + (y + 3) { = 18} [/tex]
Luke and Ella have money in their bank account in the ratio 7:8
Luke gives £2 to Ella, and the ratio becomes 4:5.
Work out the original amount of money that Ella had.
Answer:
$48
Step-by-step explanation:
Ratios can be written as fractions.
1) Initially, Luke had 7x money, Ella had 8x money. Luke gives $2 to Ella. So, Luke now has 7x - 2 money and Ella has 8x + 2. The total amount of money is 4:5. These could be shown as fractions.
7x - 2/8x + 2 = 4/5
4(8x + 2) = 5(7x - 2)
32x + 8 = 35x - 10
8 + 10 = 35x - 32x
18 = 3x
18/3 = x
x = 6
2) Substitute the result (x = 6) into 7x:8x.
= 7(6)
= 42
= 8(6)
= 48
could someone help me super fast? no fake answers please
optionally could someone help me too with any of the other questions on my profile they are worth 50 points each too
Answer:
(a) graph iii)
(b) graph v)
(c) graph ii)
(d) graph iv)
Step-by-step explanation:
All given equations are in vertex form: y = (x - h)² + k
where (h, k) is the vertex of the parabola
The vertex is the turning point of the parabola, so the minimum point for parabolas that open upward, and the maximum point for parabolas that open downward.
Vertices of the given graphs:
i) (-3, 2)
ii) (-3, -2)
iii) (2, 3)
iv) (3, 2)
v) (-2, -3)
vi) (2, -3)
Part (a)
Given equation: y = (x - 2)² + 3
Therefore, the vertex is (2, 3) → graph iii)
Part (b)
Given equation: y = (x + 2)² - 3
Therefore, the vertex is (-2, -3) → graph v)
Part (c)
Given equation: y = (x + 3)² - 2
Therefore, the vertex is (-3, -2) → graph ii)
Part (d)
Given equation: y = (x - 3)² + 2
Therefore, the vertex is (3, 2) → graph iv)
Vertex form of parabola having vertex (h,k)
y=a(x-h)²+k#1
y=a(x-2)²+3Vertex (2,3)
Graph III#2
y=(x+2)²-3Vertex (-2,-3)
Graph V#3
y=(x+3)²-2Vertex (-3,-2)
Graph II#4
y=(x-3)²+2Vertex (3,2)
Graph IVWork out the this sheet
Answer:
A -- She saves 200₤.
B -- She will have 28₤ after buying presents.
Step-by-step explanation:
If two boxes = 20 then one box will be 10. Now we count all boxes. There are 20 boxes... 20 x 10 = 200, so she saves 200₤. If she spends 172₤ on Christmas presents she will have 28₤. (200 - 172 = 28).
What is the quotient?
-3/8 ÷ -1/4
-1 1/2
-3/32
3/32
1 1/2
Answer:
1 1/2
Step-by-step explanation:
Reduce the expression, if possible, by cancelling the common factors.
Louise measured the perimeter of her rectangular scrapbook to be 154 cm. If the scrapbook is 37 cm wide, how long is the scrapbook?
Answer: 40 cm.
Step-by-step explanation: Perimeter involves adding all the sides of a shape to get the perimeter. So far, two sides of the scrapbook have been given, which are both 37 cm. 37 x 2 = 74, so that leaves us with two sides left, which are the lengths of the scrapbook. The total perimeter is 154, so if we subtract 74 from 154, we get 80. However, we have to split the 80 in half because we have two sides left. Therefore, the scrapbook's length is 40 cm for one side. I hope this isn't too confusing.
Have a great day! :)