Answer:
A sample size greater than 25
Step-by-step explanation:
Margin of error of a confidence interval:
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which z is related to the confidence level(higher confidence level means higher z) [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
The higher the margin of error, the wider the interval is.
To have a narrower interval:
For a narrower interval, the margin of error has to be diminished. This can be achieved reducing the confidence level, or increasing the sample size.
In this question:
There are no options that say reducing the confidence level, so we should increase the sample size, that is, a sample size greater than 25.
Melinda has a block of clay that weighs 28.8 Oz she divides the clay into a equal places to find the weight w in ounces of each piece does solve the equation 8 W equals 28.8
Answer:
3.6
Step-by-step explanation:
each piece weighs 3.6 ounces
Answer:
3.6
Step-by-step explanation:
28.8/w=8
8w=28.8
w=28.8/8
w=3.6
How do you write your answer as a mixed number fraction?
Answer:
to convert an improper fraction to a mixed fraction, follow these steps:
-divide the numerator by the denominator.
-write down the whole number answer.
-then write down any remainder above the denominator.
Step-by-step explanation:
Answer:
Divide the numerator by the denominator. The quotient is the whole number, and the remainder is the other fraction.
Example: 46/17
46/17= 2 r 12
2 is the whole number, and 12/17 is the fraction next to it.
4. An app developer projects that he
will earn
$20.00 for every 8 apps
downloaded. Write
an equation to represent the proportional
relationship between the number of apps
and
the total earnings.
What fraction of an hour is 4 minutes Simplest From
Answer: 1/15
Step-by-step explanation:
An hour is 60 minutes. Thus, simply do 60/4 to get 15, and that the fraction is 1/15.
Hope it helps <3 :)
Answer:
1/15
Step-by-step explanation:
1 hour = 60 minutes
[tex]\frac{4}{60}=\frac{1}{15}[/tex]
Evaluate 8x^2 + 2x + 5, when x =7
Answer:
432
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
8x² + 5x + 5
x = 7
Step 2: Evaluate
Substitute in x: 8(7)² + 5(7) + 5Evaluate exponents: 8(49) + 5(7) + 5Multiply: 392 + 35 + 5Add: 427 + 5Add: 432PLEASE HELP What is the volume?
0.3 ft
0.3 ft
0.3 ft
cubic feet
[tex]0.3\cdot0.3\cdot0.3=0.0027[/tex]
Hope this helps.
What is 4 1/3 as a decimal
Answer:
4.33 i think im not to sure
Step-by-step explanation:
math
Please please help please please
Answer:
hexagon, regular polygon
The tallest mountain in the world is Mt. Everest. It is about
140% as tall as the tallest mountain in the United States. Mt. Mckinley.
Write 140% as a mixed number in simplest form.
Answer:
7/5
Step-by-step explanation:
140 by 100
cutting methord
cut the zeros, then divide by 2.
Tate purchased a pair of slippers on the internet for a retail price of $16. After 6.5% sales tax, how much were the slippers?
Answer:
$15.02
Step-by-step explanation:
Given data
Total cost= $16
tax= 6.5%
let the actual cost of the slippers be x
6.5/100*x+ x= 16
0.065x+x= 16
1.065x= 16
divide both sides by 1.065
x= 16/1.065
x= 15.02
Hence the actual cost of the slippers is $15.02
-8(i - 6) = 32
Solve equation with distributive property
Answer:
i = 2
Step-by-step explanation:
-8(i - 6) = 32
-8i + 48 = 32
-8i = -16
i = 2
Order the steps for constructing a circle that is circumscribed about a triangle
Answer:
1. Construct the perpendicular bisector of one side of triangle.
2. Construct the perpendicular bisector of another side.
3. Where they cross is the center of the Circumscribed circle.
4. Place compass on the center point, adjust its length to reach any corner of the triangle, and draw your Circumscribed circle!
There are four steps for constructing a circle that is circumscribed about a triangle.
What exactly is the triangle?A triangle is a three-sided polygon with three angles. The total of the triangle's angles is 180 degrees.
The steps for constructing a circle that is circumscribed about a triangle are as follows;
1. Draw the perpendicular bisector of one of the triangle's sides.
2. Create another side's perpendicular bisector.
3. The intersection is the circumscribed circle's center.
4. Place the compass on the center point, change the length of the compass to reach any corner of the triangle, and draw your circumscribed circle.
Hence, the above steps help to construct a circle that is circumscribed about a triangle.
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Por enviar un paquete e de 5kg de peso a una ciudad que está a 60km de distancia una empresa de transporte me ha cobrado 9€ cuanto me costará enviar un paquete de 50 kg a 200km de distancia
Responder:
300 €
Explicación paso a paso:
Dado que:
El peso del paquete de 5 kg enviado a una distancia de 60 km es de 9 €
Tomando el producto:
5 * 60 = 9 €
300 kgkm = 9 €
1 kg · km = 9/300 €
= 0,03 €
Para un paquete de 50 kg, enviado a una distancia de 200 km:
50 * 200 = 10000 kgkm
Costo de envío de paquete:
Precio por kgkm = 0,03 €
10000 * 0,03 € = 300 €
II. Compare. Use >, < or =
6. + 8_____- 9
7. +25_____+26
8.0_____18
9. - 10_____+10
10. -7 ______.18
pls I need it fast
Answer:
6. >
7. <
8. <
9. <
10. <
all the positive integers are valued greater than the negative integers and 0 is not a integer so the positive one will be greater in all the cases
Solve for a.
√7a-10 - √2a+5=0
What is the root? If there is no root, choose none.
-1
1
3
none
Answer:
3
Step-by-step explanation:
√7a-10 - √2a+5=0
√7a-10 = √2a+5
7a-10 = 2a+5
5a = 15
a = 3
Which answer choice contains only equations?
Answer:
A
Step-by-step explanation:
because an equation has to have a = in it and A is the only one with two answers with =
3.3.4 Practice: Angle Relationships in Triangles
Practice
Math 8 Sem 2
Points Possible:5
Date:
Tips for Success
Read the assignment carefully and make sure you answer each part of the question or questions.
Check your work when you're done.
Your Assignment
Answer the questions to find the measures of ∠2 and ∠3.
1. What is the measure of ∠4? Explain how you know.
Write your answer in the space below.
2. What is the sum of the measures of the angles in a triangle?
Write your answer in the space below.
3. ∠1 is in a triangle with ∠4 and a 53° angle. What is the sum of the measures of those two angles?
Write your answer in the space below.
4. What is the measure of ∠1? Explain.
Write your answer in the space below.
5. Find the measure of ∠2. Explain how you found its measure.
Write your answer in the space below.
6. What is the measure of ∠3? Explain.
Write your answer in the space below.
For question 1 and 2, you should keep in mind that the sum of all angles in a triangle is 180°. 1. If the measure of one angle of a triangle is 90 degrees, you can assume that the sum of the other two triangles should be 90 degrees. Because
180 - 90 = 90
The sum of the three angles of any triangle is equal to 180 degrees.
Angle 2=127 because 180-53=127.
Angle 3=23 because 180-30-127=53
Angle 1=37 because 90-53=37
Angle 4=90
Angle 1+4=127
The measure of ∠1 is 125° .
Next x+64=110. The reason why you can do this is because ∠R is going to be an opposite interior angle. Subtract 64 from the left and right sides. x=46
Answer:
AP EX
Step-by-step explanation:
A number is 4 times the sum of its digits. The units digit is two more than the tens digit. Find the number.
Answer:
24
Step-by-step explanation:
Let x = the 10's digit
Let y = the units
then
10x+y = "a number"
:
A number is 4 times the sum of its digits.
10x + y = 4(x + y)
10x + y = 4x + 4y
10x - 4x = 4y - y
6x = 3y
Simply, divide by 3
2x = y
;
The units digit is two more than the tens digit.
y = x + 2
Replace y with 2x
2x = x + 2
2x - x = 2
x = 2
then
y = 4
:
24 is the number
The two digit number is equivalent to 24.
What is expression?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that a number is 4 times the sum of its digits. The units digit is two more than the tens digit.
Let the number be {A}. Then, we can write -
A = 10x + y ......... (1)
also
A = 4(x + y) ........... (2)
The units digit is two more than the tens digit, so we can write -
y = x + 2 .............. (3)
So, we can write -
10x + y = 4(x + y)
10x + (x + 2) = 4(x + x + 2)
11x + 2 = 8x + 8
3x = 6
x = 2
So, we can write {y} as -
y = 4
Number will be -
10 x 2 + 4
n = 24
Therefore, the number will be equivalent to 24.
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I need help worth 25 points please help
the answer is on the pictures
sorry if their wrong
x=1/2 (or 1)
y=3/4
Keep getting this wrong , please help
The solution for the system of equations is (1, 4).
The graph is given below.
What are coordinates in a graph?The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.
The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.
We have,
Two equations:
y = 3x + 1
y = -x + 5
The point of intersection.
3x + 1 = -x + 5
3x + x = 5 - 1
4x = 4
x = 1
And,
y = 3x + 1 = 3 + 1 = 4
or
y = -x + 5 = -1 + 5 = 4
Now,
The graph is given below.
Thus,
The solution is (1, 4).
The graph is given below.
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find the length of segment LT PLEASE HELP
a. 5
b. 7
c. 14
d. 21
Use the drop-down menu to identify what each label shows.
Answer:
please put a picture so i can awnser
Step-by-step explanation:
Answer:
where is the picture ?
Step-by-step explanation:
Given the polynomials p(x) and g(x), which of these are guaranteed to be polynomials, too?
Select all that apply.
p(x) + g(x)
p(x) = g(x)
p(x) 9(%)
p(x) - g(x)
Tanisha bought 2 skirts and 3 pairs of pants for $220. A week later she bought 1 skirt and 3 pairs of pants, at the same prices, for $185. How much is each skirt?
Answer:
220.00
-185.00
= 35.00 the difference of what was paid at the same prices.
I’ll mark u as brainliest
Answer:
8,20,32
Step-by-step explanation:
8
20
32
You would do 2 x 4 and so on
Answer:
8,20,32
Step-by-step explanation:
multiply 4 times each number in the x section
8th grade math solution problem. Please help
Simplify the ratio 16.8 to 11.2. is
Answer:
5.7
Step-by-step explanation:
Im not so sure if this is the correct answer but i hope if helps! <3
A Ferris wheel has a 44-foot radius and the center of the Ferris wheel is 50 feet above the ground. The Ferris wheel rotates in the CCW direction at a constant angular speed of 3 radians per minute. Josh boards the Ferris wheel at the 3-o'clock position and rides the Ferris wheel for many rotations. Let tt represent the number of minutes since the ride started.
Write an expression (in terms of t) to represent the number of radians Josh has swept out from the 3-o'clock position since the ride started.
How long does it take for Josh to complete one full revolution (rotation)?
________ minutes
Write an expression (in terms of t) to represent Josh's height above the center of the Ferris wheel (in feet).
Write a function f that determine's Josh's height above the ground (in feet) in terms of t.
f(t)=
Answer:
Part A
The expression in terms of 't' representing the number of radians Josh has swept since the ride started is 3·t rad
Part B
The time to complete one revolution is (2·π/3) minutes
Part C.
The function 'f' that determines Josh's height above the ground (in feet) in terms of 't' is, f(t) = 44·sin(3·t + π/2) + 50
Step-by-step explanation:
The radius of the Ferris wheel = 44 foot
The height of the Ferris wheel above the ground = 50 feet
The direction of rotation of the Ferris wheel = CCW
The angular speed of the Ferris wheel, ω = 3 radians per minute
The position from which Josh boards the Ferris wheel = 3-O'Clock
The number of minutes since the ride started started = t
Part A
The expression in terms of 't' to represent the number of radians Josh has swept since the ride started = ω × t = 3 × t rad = 3·t rad
Part B
One complete revolution = 2·π radians
The time to complete one revolution = 2·π/ω = 2·π/(3 rad/minute) = (2·π/3) minutes = [tex]0.\overline{6}[/tex]·π minutes ≈ 2.0943951 minutes
Part C.
The height, 'h', of the Ferris wheel is given by the following sinusoidal relation
f(t) = A·sin(B·t + C) + D
Where;
A = The amplitude = The radius of the Ferris wheel = 44 ft.
The period, T = (2·π/3) minute
B = 2·π/T = 3
t = The time in minutes
D = The Ferris wheel's height above ground = 50 ft.
C = The horizontal shift = π/2 (Josh boards the Ferris wheel at t = 3-O'Clock which is the midline, a rotation of π/2 from the lowermost end of the Ferris wheel)
Therefore the function that determines Josh's height above the ground (in feet) in terms of 't' is presented as follows;
f(t) = 44·sin(3·t + π/2) + 50
What is the surface area of the cylinder with height 8 ft and radius 5 ft? Round your answer to the nearest thousandth.
There are 12 students running for three student coun-
cil positions: president, vice president, and secretary.
Which of the following expressions represents the
number of ways in which these three positions can be
filled by the 12 candidates?
(a) 12.12.12
(c) 12.11.10
3.2.1
(b) 12 · 11 · 10
(d) 12!
The solution is Option C.
The number of ways 3 positions can be filled by the 12 students is given by combinations where ¹²C₃ = ( 12 x 11 x 10 ) / 3 x 2 x 1
What are Combinations?
The number of ways of selecting r objects from n unlike objects is:
ⁿCₓ = n! / ( ( n - x )! x! )
where
n = total number of objects
x = number of choosing objects from the set
Given data ,
Let the equation be represented as A
Now , the value of A is
The total number of students n = 12 students
The number of positions in the council x = 3 positions
So , the number of ways the 3 positions can be filled by 12 students is calculated by combinations
where n = 12 and x = 3
ⁿCₓ = n! / ( ( n - x )! x! )
Substituting the values in the equation , we get
¹²C₃ = ( 12! / ( 12 - 3 )! 3! )
On simplifying the equation , we get
¹²C₃ = ( 12! / 9! 3! )
And ,
¹²C₃ = ( 12 x 11 x 10 x 9! / 9! 3! )
¹²C₃ = ( 12 x 11 x 10 ) / 3!
¹²C₃ = ( 12 x 11 x 10 / 3 x 2 x 1 )
¹²C₃ = 220 ways
Hence , the number of ways the 3 positions can be filled by the 12 students is 220 ways
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