Answer:
0.7396 = 73.96% probability that the subsystem operates longer than 1000 hours.
Step-by-step explanation:
For each component, there are only two possible outcomes. Either they fail in less than 1000 hours, or they do not. The components operate independently. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
\(P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}\)
In which \(C_{n,x}\) is the number of different combinations of x objects from a set of n elements, given by the following formula.
\(C_{n,x} = \frac{n!}{x!(n-x)!}\)
And p is the probability of X happening.
Eight components:
This means that \(n = 8\)
Probability of 0.45 of failing in less than 1,000 hours.
So 1 - 0.45 = 0.55 probability of working for longer than 1000 hours, which means that \(p = 0.55\)
Find the probability that the subsystem operates longer than 1000 hours.
We need at least four of the components operating. So
\(P(X \geq 4) = P(X = 4) + P(X = 5) + P(X = 6) + P(X = 7) + P(X = 8)\)
In which
\(P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}\)
\(P(X = 4) = C_{8,4}.(0.55)^{4}.(0.45)^{4} = 0.2627\)
\(P(X = 5) = C_{8,5}.(0.55)^{5}.(0.45)^{3} = 0.2568\)
\(P(X = 6) = C_{8,6}.(0.55)^{6}.(0.45)^{2} = 0.1569\)
\(P(X = 7) = C_{8,7}.(0.55)^{7}.(0.45)^{1} = 0.0548\)
\(P(X = 8) = C_{8,8}.(0.55)^{8}.(0.45)^{0} = 0.0084\)
\(P(X \geq 4) = P(X = 4) + P(X = 5) + P(X = 6) + P(X = 7) + P(X = 8) = 0.2627 + 0.2568 + 0.1569 + 0.0548 + 0.0084 = 0.7396\)
0.7396 = 73.96% probability that the subsystem operates longer than 1000 hours.
Sketch the space curve represented by the intersection of the surfaces. Surfaces Parameter x2 + y2 + z2 = 4,x+z=2 x=1+sin t Represent the curve by a vector-valued function r(t) using the given parameter. r(t) = (1+sin t)1+Y2cos(t)1+ (1-sin)k (positive y portion) r(t) =| (1 + sin t)i+(-V2cos t)j+ (1-sin)k 、(negative y portion)
As the point moves along the helix, it traces out a three-dimensional surface in space.The space curve would look like a helix in graph.
1. First, we need to find the vector-valued function r(t) using the given parameter.
2. We can use the parameter x+z=2 to solve for the y-coordinate in terms of t:
y = √(4 − (1+sin t)2 − (1 − sin t)2).
3. We can now substitute this expression into the vector-valued function to obtain:
r(t) = (1+sin t)i+ (√(4 − (1+sin t)2 − (1 − sin t)2))j+ (1-sin)k
4. The space curve represented by the intersection of the surfaces is a helix in a graph.
The space curve represented by the intersection of the surfaces is a helix. It is a three-dimensional curve that can be described by a vector-valued function r(t) with parameter t. The vector-valued function r(t) is given by:
r(t) = (1+sin t)i+ (√(4 − (1+sin t)2 − (1 − sin t)2))j+ (1-sin)k.
The helix can be visualized as a spiral that wraps around a cylinder and is generated by a point travelling around the circumference of the cylinder at a constant speed. This can be observed by noting that the x- and z-coordinates of the vector-valued function are constant and only the y-coordinate changes over time. As the point moves along the helix, it traces out a three-dimensional surface in space.
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Regs.
Spinner A and Spinner B below are each to be spun once.
0 18
O 12
6
Spinner A
5
2
4
00
D
3
20 of 21
If the pointer cannot land on a line, how many different outcomes of a number and a color are possible?
v
Spinner B
Yellow
Brown
12 13
Red
Answer:
Step-by-step explanation:
Regs.
Spinner A and Spinner B below are each to be spun once.
0 18
O 12
6
Spinner A
5
2
4
00
yeeeeeeeeeeeeetaco avatar
yeeeeeeeeeeeeetaco
05/08/2021
Mathematics
High School
answered
Alex has some marbles.
Billie has three times as many marbles are Alex.
Chris has 9 fewer marbles than Billie.
In total they have 68 marbles.
How many marbles does Alex have?
can you say me from which cource is this
If a school has 841 students and 52% of them are girls, how many boys are there at the school? *
PLEASSEEEE HELPPPPPPP
James invests a total of $33,000 in two accounts paying 12% and 13% simple interest, respectively. How much
was invested in each account if, after one year, the total interest was $4,120.00.
A) Enter an equation that uses the information as it is given that can be used to solve this problem. Use x as
your variable to represent the amount of money invested in the account paying 12% simple interest.
Equation:
The answers are:
$ __ was invested at 12% and
$__ was invested at 13%
Answer:d3dasdadqdasdw
Step-by-step explanation:
Three spinners numbered 1 through 12 are spun. What is the probability of spinning a five on the first spinner, an even number on the second spinner, and a multiple of 4 on the third spinner?
1/96
1/72
7/12
5/6
Answer:
\(\frac{1}{96}\)
Step-by-step explanation:
Spinning a 5 is \(\frac{1}{12}\)
Spinning even is \(\frac{1}{2}\)
Spinning multiple of 4 is \(\frac{1}{4}\)
\(\frac{1}{12} *\frac{1}{2} *\frac{1}{4}\)\(=\frac{1}{96}\)
If m<1 + m<3 = 151 what is m<2?
PLEASE ASAP GIVING BRANLIEST I NEED THIS
Answer:
simple. m<2 is 29 degrees
Step-by-step explanation:
one triangle= 180 degrees
180-151=29
Help Quickly! Which survey would you expect to have fair results regarding attitudes about carnivals?
A. Do you like going to carnivals?
B. Do you like going to exciting carnivals?
C. Do you like traveling across town to go to carnivals?
D. Do you like going to noisy, overpriced carnivals?
Question A is the survey that you expect to have fair results regarding attitudes about carnivals
How to get the best survey questionThis survey question is the most neutral and fair among the options provided. It doesn't include any leading or biased language that may influence the respondent's answer.
Option B uses the adjective "exciting," which could lead people to think positively about carnivals.
Option C brings in the unrelated factor of "traveling across town," which could negatively influence the response based on travel preference rather than attitude towards carnivals. Option D uses negative descriptors "noisy" and "overpriced," which could lead people to think negatively about carnivals.
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\( \frac{2}{6 } + \frac{1}{4} = \)
how do we solve?
Answer:
7/12
Step-by-step explanation:
We cannot add fractions without the same denominator. 4 does not equal 6
ok
2/6 is the same as 4/12 because we multiply proportionately
we multiply the numerator and denominator by the same factor
2/6 x 2/2 = 4/12
now 1/4 is the same as 3/12 because we multiply by 3x3
(realize something we are not changing the value of the fraction. 2/2 is the same as 1 and 3/3 is also the same as 1)
now they have the same denominator
4/12 + 3/12+ = 7/12
A regular polygon inscribed in a circle can be used to derive the formula for the area of a circle. The polygon area can be expressed in terms of the area of a triangle. Let s be the side length of the polygon, let r be the hypotenuse of the right triangle, let h be the height of the triangle, and let n be the number of sides of the regular polygon. Polygon area = n(12sh).
Here, we let n be the number of sides of the regular polygon. Polygon area = n(12sh). As n increases, h approaches r so that rh approaches r² and hence, this statement is true. So, option 4 is the correct option.
When ns equals circumference or 2r, the polygon will turn into a circle.
A polygon must be converted into a circle.
Let s represent the polygon's side length, r represent the hypotenuse of the right triangle,
Let n be the regular polygon's number of sides and h be the height of the triangle.
The polygon's area is now specified as polygon area = n(1/2sh).
Now, we must suppose that the polygon's sides are infinite in order to obtain a circle. In order to do this, we must assume that the polygon's perimeter is the same as the circle's perimeter.
That's why when the number of sides of the polygon will increase its perimeter will become closer to 2πr and its area will become close to a circle.
The complete question that you might be looking for is-
A regular polygon inscribed in a circle can be used to derive the formula for the area of a circle. The polygon area can be expressed in terms of the area of a triangle. Let s be the side length of the polygon, let r be the hypotenuse of the right triangle, let h be the height of the triangle, and let n be the number of sides of the regular polygon. polygon area = n(12sh) Which statement is true?
As h increases, s approaches r so that rh approaches r². As r increases, h approaches r so that rh approaches r². As s increases, h approaches r so that rh approaches r². As n increases, h approaches r so that rh approaches r².Learn more about polygons on
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8r-6+2+4r Show all work
Answer
-4+12r
8r-6+2+4r
-6+2=-4
8r+4r=12r
Ann borrowed $6000 from the bank for 5 years at 12% rate. How much does she owe the bank? I need your help PLEASE!!!
Answer:
Anna owes $3600 to the bank
Step-by-step explanation:
12/100 * 6000 = 720 * 5 years
= $3600
Hence Anna owes $3600 to the bank
50 Points! Multiple choice algebra question. Photo attached. Thank you!
Answer:
B. 3188.5 cubic inches.
Step-by-step explanation:
The volume of a cone is calculated using the following formula:
Volume = (1/3) * π * r² * h
Where:
π is the mathematical constant pi, approximately equal to 3.14.r is the radius of the base of the cone.h is the height of the cone.In this problem, we are given that r = 17 inches and S.h = 20 inches.
First we need to find height h.
py using Pythagorous theorem,we get
c²=a²+b²
here c= slight height and a is radius
20²=17²+b²
20²-17²=b²
111=b²
b=√(111)
Plugging these values into the formula, we get:
Volume = ⅓*π* 17² *√(111) = 3188.5 cubic inches
Therefore, the volume of the cone is 3188.5 cubic inches.
You buy a costume for $250 and fifty pieces of candy
that each cost the same amount. You spend a total of
$270. What is the price of each piece of candy?
Answer:
¢40 or $0.40
Step-by-step explanation:
270 - 250 = 20
20 ÷ 50 = 0.4
What three consecutive integers have a sum of 12?; What is the sum of 3 consecutive integers?; What is the formula for 3 consecutive integers?; What are the consecutive numbers of 12?
The three consecutive numbers that have a sum of 12 is 3, 4 and 5. The formula for calculation is x + x + 1 + x + 2 = 12.
Let the first number in three consecutive numbers be x. So, the next two numbers will be (x+1) and (x+2). Now, their sum wil be represented as mathematical equation -
x + x + 1 + x + 2 = 12
Performing addition on Left Hand Side of the equation
3x + 3 = 12
Rewriting the equation
3x = 12 - 3
Performing subtraction on Right Hand Side of the equation
3x = 9
x = 9/3
Performing division on Right Hand Side of the equation
x = 3
So, next number = x+1
Second number = 3+1
Second number = 4
Third number = x+2
Third number = 3+2
Third number = 5
Hence, the three consecutive numbers are 3, 4 and 5.
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-2(-5y + 10) simplify the expression
Answer:
10y - 20
Step-by-step explanation:
PLEASE HELP !!
Consider the sequence
1, 3, 5, 7, 9.
Which statement is true?
A) The range is {1, 3, 5, 7, 9}
B) The domain is the set of real numbers from 1 to 5
C) The domain is the set of natural numbers from 0 to 4
D) The range is the set of natural numbers from 1 to 5
Answer:
A)
Step-by-step explanation:
The range is {1, 3, 5, 7, 9}
The required solution the sequence 1, 3, 5, 7, 9 has the range is {1, 3, 5, 7, 9}.
What is a range ?The range is the difference between the largest and smallest numbers. The midrange is the average of the largest and smallest number. The range only takes into account these two values and ignore the data points between the two extremities of the distribution.
Given:
The sequence is
1, 3, 5, 7, 9.
According to given question we have
The range is the difference between the highest and lowest values within a set of numbers and also set of all real number between them.
So, the sequence 1, 3, 5, 7, 9 has the range is {1, 3, 5, 7, 9}.
Therefore, the required solution the sequence 1, 3, 5, 7, 9 has the range is {1, 3, 5, 7, 9}.
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Question Jo Agri-Small Business limited expenses on petrol for their fleet is R 4850,00 at the end of September and they have a balance of R106 360,00 remaining in their account. The company has used 25% of its September income on Salanes, 11% on electricity, rates and taxes, and 42% of the remaining on Insurance and investments. The total income and expenditure in September are g. income is R193.236,00 and expenditure is R. 4.850,00 b. income is R 106360,00 and expenditure is 2299 596, 00 c. income is R106 360,00 and expenditure is R 4850,00 d Income is R299596,00 and expenditure is R193 236,00
The total income and expenditure of Agri-small business limited in September is R 299596 and expenditure is R 193236.
How to find the Expense?We have to find the total income and expenditure in September.
The equation for insurance is mathematically given as :
Insurance = 42% of the balance
Insurance=0.42*0.64A
Insurance=0.2688A.
Total expenditure after all other expenditures = 0.64A-0.2688A
Total expenditures after all other expenditures = 0.3712A.
Total expenditures after all other expenditures is as 111210 (106360 +4850)
Equating both the equation and value:
111210 = 3712 A
A = 299596
Thus The total income is 299596.
Therefore the calculation of expense is given as:
Expense=0.25A+0.11A+0.2688A+4850
Expense=0.6288A+4850
=0.6288*299596+4850
=193236
The expense is 193236.
Hence, the total income and expenditure in September are "Income is R 299596 and expenditure is R 193236.
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Find the volume of a pyramid with a square base, where the side length of the base is
10.6
in
10.6 in and the height of the pyramid is
12.3
in
12.3 in. Round your answer to the nearest tenth of a cubic inch.
Answer:
V = 460.68
Step-by-step explanation:
V=(lwh)/3
h(0)=
evaluate the function please!!
Use the given conditions to write an equation for the line in the indicated form.
Passing through (2, 2) and perpendicular to the line whose equation is y = 4x + 7;
point-slope form
A)y=-4x-10
B)y-2=-1/4(x-2)
C)y-2=1/4(x+2)
D)y-2=1/4(x-2)
Answer:
B) y - 2 = (-1/4)(x - 2)
Step-by-step explanation:
Start with the equation of the given line: y = 4x + 7.
Determine the slope of the given line, which is 4.
Since the perpendicular line has a negative reciprocal slope, the perpendicular line's slope is -1/4.
Use the point-slope form of a linear equation: y - y₁ = m(x - x₁), where (x₁, y₁) is the given point and m is the slope.
Substitute the values x₁ = 2 and y₁ = 2 into the point-slope equation: y - 2 = (-1/4)(x - 2).
Simplify by distributing -1/4 to (x - 2): y - 2 = (-1/4)x + 1/2.
Add 2 to both sides to isolate y: y = (-1/4)x + 1/2 + 2.
Simplify further: y = (-1/4)x + 5/2.
The equation in point-slope form for the line passing through (2, 2) and perpendicular to y = 4x + 7 is y - 2 = (-1/4)(x - 2), which matches option B.
HURRY!!!!!!!!!!!!!!!
The table shows the proportional relationship between the number of tickets required per game at a carnival. Games 4 7 10 Tickets 20 35 50 Determine the constant of proportionality.
Correct answer will get brainiest
Answer:
Therefore, the constant of proportionality for the given proportional relationship is 5.
Step-by-step explanation:
To determine the constant of proportionality in the given proportional relationship, we can use the formula:
Constant of Proportionality = Tickets / Games
Let's plug in the values from the table:
For the first set of values (4 games and 20 tickets):
Constant of Proportionality = 20 / 4 = 5
For the second set of values (7 games and 35 tickets):
Constant of Proportionality = 35 / 7 = 5
For the third set of values (10 games and 50 tickets):
Constant of Proportionality = 50 / 10 = 5
In all three cases, the constant of proportionality is equal to 5.
Therefore, the constant of proportionality for the given proportional relationship is 5.
Three questions Please HELP!
At which point do the equations y=−2x+10 and y=x+4 intersect?(1 point)
(1,6)
(2,6)
(2,5)
(1,5)
2.If the two lines y1=−12x+5 and y2=2x+5 were to be graphed, what would their intersection point represent?
(1 point)
Their intersection point is the only point where different inputs into both functions yield different outputs.
Their intersection point is the only point where the same input into both functions yields different outputs.
Their intersection point is the only point where different inputs into both functions yield the same output.
Their intersection point is the only point where the same input into both functions yields the same output.
3.Given an equation y=−13x+5, explain the steps for using slope-intercept form to graph this equation.(1 point)
Use the y-intercept to plot the point (5,0). Then, using the y-intercept as a reference point, move right 3 units and up 1 unit, and plot a second point.
Use the y-intercept to plot the point (0,5). Then, using the y-intercept as a reference point, move left 1 unit and up 3 units, and plot a second point.
Use the y-intercept to plot the point (0,5). Then, using the y-intercept as a reference point, move left 3 units and up 1 unit, and plot a second point.
Use the y-intercept to plot the point (5,0). Then, using the y-intercept as a reference point, move left 3 units and up 1 unit, and plot a second point.
Answer:
2,6
Step-by-step explanation:
Answer:
1. (2,6)
2. C
3. B
Step-by-step explanation:
y = - 2x + 10
y = x + 4
SInce the two equation both equal y, we can said they are equal.
- 2x + 10 = x + 4
- 10 - 10
- 2x = x - 6
- x - x
- 3x = - 6
/-3 /-3
x = 2
Then we plug the x value into the equations and we will get the point that intersects y=-2x+10 and y=x+4.
- 2(2) + 10 = 2 + 4
- 4 + 10 = 6
6 = 6
This is true since both sides are equal.
The point that intersects y=-2x+10 and y=x+4 is (2,6).
2. If the two lines y1=−12x+5 and y2=2x+5 were to be graphed, what would their intersection point represent?
C) Their intersection point is the only point where different inputs into both functions yield the same output.
Ex: y=-2x+10 and y=x+4 both have the same solution which is (2,6).
3. Given an equation y=−13x+5, explain the steps for using slope-intercept form to graph this equation.
y = - 1/3x + 5
y = - 1/3(0) + 5
y = 5
Point: (0,5)
Slope: - 1/3
Rise over run (y/x) so up 3 and left 1.
B) Use the y-intercept to plot the point (0,5). Then, using the y-intercept as a reference point, move left 1 unit and up 3 units, and plot a second point.
Which set of values are equivalent.
3/10, 30%, 0.3 50%. 1/2, 0.05 0.625, 5/8, 6.25% 1.14, 2/5, 4%
Answer:
3/10, 30% and 0.3 are equivalent
50% and 1/2
0.625 and 5/8
2/5 and 4%.
Hope that helps. x
(9-3) -6+(-102
Help me
Answer: -102
Step-by-step explanation: First we do 9-3 = 6, then add -6 which cancels each other out, so all we have left is -102.
Hope this helps! :)
Answer:
-102
Step-by-step explanation:
(+9) - (+3) = +6
(-6) = -6
+ (-102) = -102
so, +6 -6 -102 = -102
Brandon gets paid $7.55 per hour. How much does he make if he worked 35 hours?
A. $302.00
B. $2,642.50
C. $264.25
D.$30,200.00
Answer:
C
Step-by-step explanation:
7.55 x 35 =
264.25
Hope this helped
Factor the expression -8x 2+ 22x - 15
What is the ratio of -1,6,-36,216
Answer:
-6
Step-by-step explanation:
hope this helped <3
Deb is searching online for airline tickets. Two weeks ago, the cost to fly from Boston to Hartford was $300. Now the cost is $375. What is the percent increase? What would be the percent increase if the airline charges an additional $50 baggage fee with the new ticket price?
The percent increase in the cost to Deb, to fly from Boston to Hartford is 25%
If the airline charges an additional $50 baggage fee then the percent increase would be 41.67%
How to find the percent increase?The percent increase to Deb to fly from Boston to Hartford can be found by the formula:
= ( Cost to fly now - Cost to fly two weeks ago ) / Cost to fly two weeks ago
= ( 375 - 300 ) / 300
= 0. 25
= 25%
If an additional $50 baggage fee is added to the new price, the percent increase is:
= ( (375 + 50 ) - 300 ) / 300
= 41.67%
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