A manufacturer of bolts has a quality-control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. The quality-control engineer knows that the bolts coming off the assembly line have mean length of 7 cm with a standard deviation of 0.10 cm. For what lengths will a bolt be destroyed?
The bolt of length more than 7.2 cm will be destroyed.
Mean refers to the central tendency of a data set. It is calculated by taking average of the data.
It is given that
any bolts that are more than 2 standard deviations from the mean will be destroyed
Mean = 7 cm
Standard Deviation is = 0.10 cm
The length of the bolt which is not acceptable is = Mean + 2 Standard Deviation.
Length = 7 + 2 * 0.10
Length = 7.2 cm
Therefore if the bolt of length more than 7.2 cm will be destroyed.
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need the answerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
Answer: the one on the right on the top
Step-by-step explanation:
as x increases by 1, y decreases by 2. this makes a linear function
Answer: the answer is the first option
Step-by-step explanation:
Both ABC and 3D8 are three digit numbers such that ABC - 3D8 = 269.
If 3D8 is divisible by 9, then what number does ABC represent?
Answer:
647
Step-by-step explanation:
The divisibility rule for 9 can be used to find the unknown number.
Divisibility ruleA number is divisible by 9 if the sum of its digits is divisible by 9.
The number 3D8 will be divisible by 9 when 3 + D + 8 = <multiple of 9>. Since D is a single digit, we must have ...
11 +D = 18
D = 7 . . . . . . . subtract 11
The number 3D8 is 378.
DifferenceNow we know that the difference is ...
ABC -3D8 = ABC -378 = 269
ABC = 269 +378 = 647
ABC represents the number 647.
This is from Khan academy I have to attach a PNG if you can help me solve it! Thank you!
The expression [tex]10^{t^2+2t-3}[/tex] is equivalent to the expression [tex](10^{t+3})^{t-1[/tex]
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
Given the expression:
[tex]10^{t^2+2t-3}\\\\=10^{t^2+3t-t-3}\\\\=10^{[t(t+3)-1(t+3)]}\\\\=10^{(t-1)(t+3)}[/tex]
The expression [tex]10^{t^2+2t-3}[/tex] is equivalent to the expression [tex](10^{t+3})^{t-1[/tex]
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someone please help omg
The equation for ΔFON is sin F = 9/18.
Hence, option B) sin F = 9/18 is the correct answer.
This question is incomplete, the complete question is;
Which equation is correct for ∆FON?
Answers:
A.) cos F= 9/18
B.) sin F 9/18
C.) sin F=18/9
D.) cos F=18/9
Which equation is correct for ΔFON?From the diagram, we have a right angle triangle.
Hypotenuse = 18Perpendicular height or opposite to ∠F = 9Equation of angle F = ?Note that; sinθ = Opposite / Hypotenuse
Therefore, for angle F
sin F = Opposite / Hypotenuse
sin F = 9/18
The equation for ΔFON is sin F = 9/18.
Hence, option B) sin F = 9/18 is the correct answer.
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0.How many elements doesA contain if it has:
a.64 subsets?
b.31 proper subsets?
c.No proper subset?
d.255 proper subsets?
the perimeter of a quadrant is 52cm, find the radius of the quadrant
The radius of the quadrant whose perimeter is 52cm is 14.56cm.
A quadrant is 1/4th of a circle, consisting of two radii, perpendicular to each other.
So, the perimeter of a quadrant consists of two radii and an arc, which is 1/4th the perimeter of a circle.
Therefore, the perimeter of the quadrant = 2r + (1/4)*(2πr) = 2r + (πr/2).
Now, we are given the perimeter of the quadrant = 52cm and are asked to find its radius.
We suppose the radius to be r cm.
Therefore, we can say that:
52 = 2r + (πr/2).
or, 52 = (4r + πr)/2
or, 52*2 = r(4 + π)
or, r = 104/(4 + π) = 14.56.
Therefore, the radius of the quadrant whose perimeter is 52cm is 14.56cm.
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A telemarketer earns a base salary of $3,000 per month, plus an annual bonus of 2.5% of total sales above $250,000. which function represents the annual salary for total sales of x dollars, where x is greater than $250,000?
The function which represents the annual salary for total sales of x dollars, where x is greater than $250000 is 0.025x+29750.
Given basic salary=3000 p.m. , bonus 2.5% of total sales above $250000.
We have to make a function which shows the annual salary for total sales of x dollars where x is greater than $250000.
Function is a relationship between two or more variables which have each y values corresponding to x values.
According to question
Total basic salary of whole year=3000*12=$36000
We have been given total sales be x.
Sales above $250000 is x-250000
Bonus on sales=2.5%(x-250000)
Function f(x)=36000+2.5%(x-250000)
=36000+0.025x-0.025*250000
=36000+0.025x-6250
=0.025x+29750
Hence the function which shows the annual salary for total sales of x dollars is f(x)=0.025x+29750.
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Directions: Name the coefficient (s) in the following expressions: 1. 12s + 4t 2. 46rs + 10x 3. 12q + 14x 4. 10x + 10y 5. 17rs + 32x 6. 5x + 7y - 12z 7. 36ab + 70m 8. 3r + 19a + 10m 9. 7k + 16m 10. 8r + 5s 11. 9h + 120m 12. 12k + m 13. 7g + 15h + w 14. 4c - 8d + 12f 15. 6t + 17r - 35j
The coefficient are as follows:
What is Algebra?Algebra is the part of mathematics that helps represent problems or situations in the form of mathematical expressions.
1. 12s + 4t
Variables: s, t
Coefficient: 12, 4
2. 46rs + 10x
Variables: r, s, x
Coefficient: 46, 10
3. 12q + 14x
Variables: q, x
Coefficient: 12, 14
4. 10x + 10y
Variables: x, y
Coefficient: 10, 10
5. 17rs + 32x
Variables: r, s, x
Coefficient: 17, 32
6. 5x + 7y - 12z
Variables: x, y, z
Coefficient: 5, 7, -12
7. 36ab + 70m
Variables: a, b, m
Coefficient: 36, 70
8. 3r + 19a + 10m
Variables: r, a, m
Coefficient: 3, 19, 10
9. 7k + 16m
Variables: k, m
Coefficient: 7, 16
10. 8r + 5s
Variables: r, s
Coefficient: 8, 5
11. 9h + 120m
Variables: h, m
Coefficient: 9, 120
12. 12k + m
Variables: k, m
Coefficient: 12, 1
13. 7g + 15h + w
Variables: g, h, w
Coefficient: 7, 15 , 1
14. 4c - 8d + 12f
Variables: c, d, f
Coefficient: 4, -8, 12
15. 6t + 17r - 35j
Variables: t, r, j
Coefficient: 6, 17, -35
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a car tire with radius 12 in. does 80 revolutions in a minute. how far does the car travel ?
Answer:
Travel distance in one minute is 6028.8 inches or 502.4 feet or 167.5 yards=======================
GivenTire has radius of 12 in;Tire does 80 revolutions per minute.To findTravel distance in one minuteSolutionUse circumference formula to find the tire circumference:
C = 2πrC = 2*3.14*12 = 75.36 inFind the distance by multiplying the number of revolutions by circumference:
d = 80*75.36 in = 6028.8 inConvert the inches to feet, or yards, considering 12 in = 1 foot and 3 feet = 1 yard:
6028.8/12 = 502.4 feet502.4 /3 = 167.5 yardsA company is manufacturing two kinds of juice boxes. One is in the shape of a rectangular prism
with dimensions 10 cm by 6 cm by 4 cm. The other is a cylinder with radius 2.8 cm and height 10 cm.
Compare the volumes and surface areas of these two juice boxes.
The volume of volume of the rectangular prism is=240cm³ while the surface area of cylinder =225.04cm²
Calculation of volume of prismThe volume of rectangular prism
= l×w×h
= 10× 6× 4
= 240cm³
The surface area of cylinder,
= 2πrh+2πr²
= 2× 3.14× 2.8 × 10 + 2×3.14×2.8²
= 175.84 + 49.2
= 225.04cm²
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A = {0, 3, 1, 1.3, 2, 3, 4, 5, 2}
B = the set of all Natural numbers
C= the set of all Rational numbers
A ∩ C =
A ∩ B=
Answer:
A ∩ C = {0, 3, 1, 1.3, 2, 3, 4, 5, 2}
A ∩ B = {3, 1, 2, 4, 5}
Step-by-step explanation:
Given that A = {0, 3, 1, 1.3, 2, 3, 4, 5, 2}
B = the set of all Natural numbers
C= the set of all Rational numbers
So set C contains numbers that can be expressed as the ratio of two integers. Since numbers in A can be expressed as follows:
0 = 0/1, 3 = 3/1, 1 = 1/1, 1.3 = 13/10, 2 = 2/1, 4 = 4/1, 5 = 5/1
Then, A ∩ C = {0, 3, 1, 1.3, 2, 3, 4, 5, 2}.
A ∩ B = {3, 1, 2, 4, 5}, since B contains only Natural numbers = {1, 2, 3, ...}.
I forgot how to solve this equation for both answers already :( I will be very much appreciated if I could get a step by step clear solution for both answers!
The equations for the lines tangent to and normal to the curve at the point (2, 4) are y = 4 · x - 4 and y = (-1/4) · x + 9/2, respectively.
How to derive the equation of lines tangent and normal to a point of a curve
In this question we must use the definitions of linear function, tangent and normal lines and differential calculus to determine the equations needed. The slope of the tangent line (m) is found by implicit differentiation:
2 · x + 2 · y · y' - 3 · (y + x · y') = 0
2 · x + (2 · y - 3 · x) · y' - 3 · y = 0
(2 · y - 3 · x) · y' = 3 · y - 2 · x
y' = (3 · y - 2 · x)/(2 · y - 3 · x)
By (x, y) = (2, 4)
m = (3 · 4 - 2 · 2)/(2 · 4 - 3 · 2)
m = 4
And the slope of the normal line is:
m' = -1/m = -1/4
Lastly, we obtain the intercept for each line:
Tangent line
b = 4 - 4 · 2
b = 4 - 8
b = - 4
The equation of the line tangent to the curve at the point (2, 4) is y = 4 · x - 4.
Normal line
b = 4 - (-1/4) · 2
b = 4 + 1/2
b = 9/2
The equation of the line normal to the curve at the point (2, 4) is y = (-1/4) · x + 9/2.
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Please Answer, Quickly
Answer:
Answers are below.
Step-by-step explanation:
1) 60 centimeters
2) Perimeter = 48, Area = 144
3) Circumference = 20π, Area = 100π
4) 180 feet
5) 75 meters
6) 15 yards
Hope this helps!
A count of the number of even numbers obtained from a random number
generator would best be modelled by what distribution?
A. geometric
B. Poisson
C. binomial
D. normal
Considering that there are only two possible outcomes for each number, and a fixed number of numbers, the distribution is:
C. binomial.
What distribution models the situation?We have that:
For each number on the sequence, there are only two possible outcomes, either it is even or it is odd.A number being even is independent of any other number.The sequence has a constant cardinality.Hence the binomial distribution should be used and option B is correct.
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Pls help
Geometry
What is the volume?
Answer:
199.5 ft^3
Step-by-step explanation:
to find your answer you simply multiply all the measurements together
19 * 1.5 * 7 is your equation
19 * 1.5 * 7 = 199.5
it is 199.5 ft^3
Four less than the product of three and a number
four less than three times that number is:3x-4
is:=
three more than two times the number: 2x+3
Problem to solve:
3x-4=2x+3
3x-2x-4=2x-2x+3
x-4=3
x-4+4=3+4
x=7
Calculated:
3(7)-4=2(7)+3
21-4=14+3
17=17
Rafael found an icicle 20 inches long. How long is it in feet? Write your answer as a whole number or a mixed number in simplest form. Include the correct unit in your answer.
Answer:
1 2/3
Step-by-step explanation:
12 inches = 1 foot
So, 20/12 is equal to 1 8/12 foot
remeber to simplify though, so 8/12 simplified is 2/3, so the solution to the problem is 1 2/3 foot
What is the value of the sum?
Drag and drop the answer into the box to match the sum with its value.
-7/9+2/3
Which of the following graphs represent a one-to-one function?
Answer:
Graph Number 2
Step-by-step explanation:
Use the horizontal line test: If you can draw a horizontal line at any point and it only intersects the line once, then it's a one-to-one function.
the number of users on a new social media website can be modeled by the function f(t) = 12(1.2)^t , where t is the time, in weeks, since the site was launched. Find and interpret the average rate of change on the interval (3,6) round to the nearest whole number
The number of users on new social media site increase as 21, 25, 30, 36,
The average rate of change is given by 5.
The function f (t) = 12 (1.2) ^t show how the rate of users increases in weeks.
Average of the values is the ratio of total sum of values to the number of values.
Here, f (t) = 12 (1.2) ^t is defined in the range of (3, 6)
So the value of the function in its range is given by
1) f (3) = 12 (1.2) ^3
= 21
2) f (4) = 12 (1.2) ^4
= 25
3) f (5) = 12 (1.2) ^5
= 30
4) f (6) = 12 (1.2) ^6
= 36
Now the average rate of change = sum of all difference in values at every week / max. Difference in interval of range(3,6)
= f(6)-f(3)/6-3
= 15/3
= 5
Thus required average change of rate is 5.
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Two circles with different radii have chords AB and CD, such that AB is congruent to CD. Are the arcs intersected by these chords also congruent? Explain.
Hint:
It would be helpful to draw two circles and label them according to the given information, then evaluate possible arc measures.
Consider the type of triangle that may be drawn by connecting the endpoints of a chord to the center of a circle. Compare the triangles made by two circles with different radii.
The arcs intersected by these chords are not congruent.
Given that two circles with different radii have chords AB and CD, such that AB is congruent to CD.
Let r₁ and r₂ be the radii of two different circles with centers O and O' respectively.
Assuming that the each of the ∠АОВ and ∠CO'D is less than or equal to π.
Then, we have isosceles triangle AOB and CO'D such that,
AO = OB = r₁,
CO' = O'D = r₂,
Let us assume that r₁< r₂;
We can see that arc(AB) intersected by AB is greater than arc(CD), intersected by the chord CD;
arc(AB) > arc(CD) .......(1)
Indeed,
arc(AB) = r₁ angle (AOB)
arc(CD) = r₂ angle (CO'D)
So, we have to prove that ;
∠AOB >∠CO'D ......(2)
Since each angle is less than or equal to π, and so
∠AOB/2 and ∠CO'D/2 is less than or equal to π
it suffices to show that :
tan(AOB/2) >tan(CO'D/2) ......(3)
From triangle AOB :
tan(AOB/2) = AB/(2*r₁)
tan(CO'D/2) = CD/(2*r₂)
Since AB = CD and r₁ < r₂ (As obtained from the result of (3) ), therefore, arc(AB) > arc(CD).
Hence, for two circles with different radii have chords AB and CD, such that AB is congruent to CD but the arcs intersected by these chords are not congruent.
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Factor by Grouping.
The ac product of 35x² + 41x + 12 is
The factors of the ac product that add to 41 are
35x² + 41x + 12 =
Submit Question
Answer:
AC Factor: 420
Factors that add up to 41: 20 and 21
Rewritten equation: [tex](35x^2+21x)+(20x+12)[/tex]
Step-by-step explanation:
so a quadratic equation is generally expressed as [tex]ax^2+bx+c[/tex]. So in this polynomial 35=a and c=12. The ac product would thus be (35)(12) which is 420
The factors of the AC product include: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20 , 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210 and 420. Since we're looking for a bigger number which is 41 you would generally want to look near the middle. and you can disregard any factors equal to or above 42. since they wouldn't add to 41. So I'll start at 30. 420/30 = 14 and 30 + 14 = 44 which is pretty close. Alright I'll try 28 instead. 420/28 = 15 and 15+28 = 43 which is also pretty close so I'll try the next factor 420/21 = 20 and 20+21 = 41! so the two factors are 20 and 21
Now using these two factors you can rewrite the equation as
[tex](35x^2+21x)+(20x+12)[/tex] which simplifies to the same quadratic equation
y=35x²+41x+12
Here
a=35 and c=12So
AC=35(12)=420Now
Factors that add up to 41 are 21 and 20
Now solve
35x²+41x+12=035x²+21x+20x+127x(5x+3)+4(5x+3)(7x+4)(5x+3) There are 130 passengers in the plane they both want headphones and blanket we have 106 headphones and 156 blanket how many passengers can have both headphones and blankets? Explain
A. 106
B. 130
C. 138
D. 156
Answer:
262 passengers can have both headphones and blankets .
Step-by-step explanation:
I hope it will help you
On a coordinate plane, 2 lines intersect around (0.4, 2.8).
The graph on the left represents a system of equations.
How can the solution be located?
Which integers is the x-coordinate between?
Which integers is the y-coordinate between?
What is the solution approximated to the tenths place
The solution of the graph can be located at the point of intersection of the two lines. The solution, approximated to the tenths place will be (0.4, 2.8)
What is the solution of a system?The solution of a system of two linear equations can be calculated by determining the point of intersection.
Therefore, the solution = the coordinates of the point of intersection (x-coordinate, y-coordinate).
Given graph shows the system of equations in two lines:
The solution of the graph can be located at the point of intersection of the two lines, the x-coordinate against the y-coordinate.
The integers that the x-coordinate of the point of intersection is in between are 0 and 1.
The y-coordinates of the point of intersection lie between the integers 2 and 3.
The solution, approximated to the tenths place will be (0.4, 2.8)
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Solve Tx" + (4t - 2)X' + (13t - 4)X = 0, If X(0) = 0
The solution of Tx" + (4t - 2)X' + (13t - 4)X = 0, If X(0) = 0 is mathematically given as
[tex]&n \times(S)=\frac{c}{\left((s+2)^{2}+9\right)^{2}}[/tex]
What is the solution of Tx" + (4t - 2)X' + (13t - 4)X = 0, If X(0) = 0?Generally, the equation for is mathematically given as
[tex]&t x^{\prime \prime}+(4 t-2) x^{\prime}+(13 t-4) x=0, \quad x(0)=0\\\\&\Rightarrow \quad t x^{\prime \prime}+4 t x^{\prime}-2 x^{i}+13 t x-4 x=5\\[/tex]
By taking Laplace to transform,
[tex]&L\left\{t x^{13}\right\}+L\left\{4 t x^{\prime}\right\}-L\left\{2 x^{\prime}\right\}+L\{13 t x\}-L\{4 x\}=0\\\\\\&-25 x(s)-s^{2} x^{1}(5)-4 x(s)-45 x^{\prime}(s)-25 x(s)-13 x^{\prime}(5)-4 x(s)=0\\[/tex]
[tex]&\Rightarrow \quad-\left(5^{2}+45+13\right) x^{4}(5)-4(5+2) x(5)=0\\\\\\&\Rightarrow \quad\left(s^{2}+45+13\right) x^{1}(5)+4(5+2) x(5)=0\\\\\\&\Rightarrow\left(s^{2}+4 s+13\right) x^{\prime}(s)=-4(s+2)^{x}(s)\\\\\\&\Rightarrow \frac{x^{\prime}(s)}{x(s)}=-\frac{4(s+2)}{s^{2}+4 s+13}\\\\\[/tex]
In conclusion, By integrating both sides
The solution is
[tex]&x(s)=\frac{c}{\left(s^{2}+4 s+13\right)^{2}}\\[/tex]
[tex]&n \times(S)=\frac{c}{\left((s+2)^{2}+9\right)^{2}}[/tex]
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Please answer this question for me
PLEASEEE HELP!!!! 20 POINTS
The correct statement regarding the limit, using asymptotes, is:
The function [tex]f(x) = \frac{28x - 10x^2}{4x^2 - 1}[/tex] has a horizontal asymptote at [tex]y = -\frac{5}{2}[/tex].
What are the asymptotes of a function f(x)?The vertical asymptotes are the values of x which are outside the domain, which in a fraction are the zeroes of the denominator.The horizontal asymptote is the limit of f(x) as x goes to infinity, as long as this value is different of infinity.In this problem, we have a limit, which is associated with a horizontal asymptote. The limit is:
[tex]\lim_{x \rightarrow \infty} \frac{28x - 10x^2}{4x^2 - 1}[/tex]
x goes to infinity, hence we consider only the highest exponents.
[tex]\lim_{x \rightarrow \infty} \frac{28x - 10x^2}{4x^2 - 1} = \lim_{x \rightarrow \infty} -\frac{10x^2}{4x^2} = -\frac{10}[4} = -\frac{5}{2}[/tex]
Hence the correct statement is:
The function [tex]f(x) = \frac{28x - 10x^2}{4x^2 - 1}[/tex] has a horizontal asymptote at [tex]y = -\frac{5}{2}[/tex].
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Find the first three iterates of the function f(z) = 2z + (3 - 2i) with an initial value of
z0 = -1 - 2i.
a.
1 - 6i, 5 - 14i, 13 - 30i
c.
5 - 2i, 13 - 2i, 29 - 2i
b.
2 - 5i, 9 - 17i, 21 - 37i
d.
3 - 2i, 17 - 2i, 23 - 2i
Answer: a
Step-by-step explanation:
[tex]z_0=-1-2i\\\\z_1=2(-1-2i)+(3-2i)=-2-4i+3-2i=1-6i[/tex]
This eliminates all the options except for a.
Next, create a line through point C that is perpendicular to . Label the intersection between the perpendicular line and as point E. Take a screenshot of the triangle with CE, save it, and insert the image in the space below.
Question : Draw a triangle ABC. Next, create a line through point C that is perpendicular to . Label the intersection between the perpendicular line and as point E. Take a screenshot of the triangle with CE, save it, and insert the image in the space below.
We know that having three sides, three angles, and three vertices, a triangle is a closed, two-dimensional shape. A polygon also includes a triangle.
A line is a straight, one-dimensional figure in geometry that is infinitely long in both directions and has no thickness.
The definition of a perpendicular line in geometry is a pair of lines that meet or intersect at right angles (90°). The Latin word "perpendicularis," which denotes a plumb line, is where the word "perpendicular" first appeared. Two lines, AB and CD, can be written as AB⊥CD if they are perpendicular to one another. The perpendicular nature of the lines is denoted by the symbol.
Here, we have to draw a triangle. Then we have to draw a line CE which intersects AB at point E.
Image is attached below.
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