The probability that the mean of a sample of 90 computers would be greater than 117.13 months, if the quality control manager is correct, is approximately 0.9955 or 99.55%.
The sampling distribution of the sample mean follows a normal distribution with a mean of 120 and a standard deviation of 10/sqrt(90) = 1.0541 months (using the formula for the standard deviation of the sample mean).
To find the probability that the mean of a sample of 90 computers would be greater than 117.13 months, we can standardize the sample mean using the formula:
z = (sample mean - population mean) / (standard deviation of sample mean) = (117.13 - 120) / 1.0541 = -2.6089
Using a standard normal distribution table or calculator, we can find that the probability of obtaining a z-score greater than -2.6089 is approximately 0.9955.
Therefore, the probability that the mean of a sample of 90 computers would be greater than 117.13 months, if the quality control manager is correct, is approximately 0.9955 or 99.55%.
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The table describes the quadratic function p(x).
x p(x)
−1 31
0 17
1 7
2 1
3 −1
4 1
5 7
What is the equation of p(x) in vertex form?
p(x) = 2(x − 3)2 − 1
p(x) = 2(x + 3)2 − 1
p(x) = 3(x − 3)2 − 1
p(x) = 3(x + 3)2 − 1
Answer:
[tex]p(x)=2(x-3)^2-1[/tex]
Step-by-step explanation:
The values are symmetric about [tex]x=3[/tex], meaning the equation is of the form [tex]p(x)=a(x-3)^2-1[/tex].
Since [tex]p(4)=1[/tex], it follows that:
[tex]1=a-1 \\ \\ a=2[/tex]
Therefore, [tex]p(x)=2(x-3)^2-1[/tex].
find the length of each arc
The arc length of the each arc are 14π cm, 95π/6 ft, 7π cm, 39π/4 ft.
What is arc length of a circle?
The arc length formula for a circle is given by L = rθ, where L is the arc length, r is the radius, and θ is the central angle measured in radians.
9) Here angle= 315° and radius= 8cm.
First, we need to convert the angle to radians: 315° × (π/180°) = 7π/4.
Then we can use the arc length formula,
L = 8 × 7π/4 = 14π cm.
10) Here angle = 150° and radius= 19 ft.
First, we need to convert the angle to radians: 150° × (π/180°) = 5π/6.
Then we can use the arc length formula,
L = 19 × 5π/6 = 95π/6 ft
11) Here angle = π/2 and radius= 14 cm.
According to the arc length formula,
L = 14 × π/2 = 7π cm .
12) Here angle= 3π/4 and radius= 13 ft.
According to the arc length formula,
L = 13 × 3π/4 = 39π/4 ft.
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NEED HELP ASAP!!!
A student missed 11 problems on a English test and received a grade of 50%. If all the problems were of equal value, how many problems were on the test? Follow the problem-solving process and round your answer to the nearest integer.
Answer:
22 problems
Step-by-step explanation:
50% is half of 100, so if 100 divided by 2 is 50, then 11 x 2 is 22. 22 is the answer
Find the final amount of money in an account if $ 2 ,100 is deposited at 2 % interest compounded annually and the money is left for 5 years.
[tex]~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$2100\\ r=rate\to 2\%\to \frac{2}{100}\dotfill &0.02\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &5 \end{cases} \\\\\\ A = 2100\left(1+\frac{0.02}{1}\right)^{1\cdot 5}\implies A=2100(1.02)^5 \implies A \approx 2318.57[/tex]
About 4.1 x 10^7 people live in California. About 6.3 x 10^5 people live in Vermont. About how many more people live in California than in Vermont?
A) 6.5 x 10^6
B) 6.5 x 10^7
C) 4.037 X 10^7
D) 4.037 x 10^5
Answer:
The answer is option C) 4.037 x 10^7.
Step-by-step explanation:
To find out how many more people live in California than in Vermont, we need to subtract the population of Vermont from the population of California.
The population of California is 4.1 x 10^7.
The population of Vermont is 6.3 x 10^5.
Therefore, the difference in population between California and Vermont is:
4.1 x 10^7 - 6.3 x 10^5
= 4.037 x 10^7
So, about 4.037 x 10^7 more people live in California than in Vermont.
The answer is option C) 4.037 x 10^7.
Use the grid on the whiteboard to solve the following system of inequalities by graphing:
y≥-1/2x-8
y<8x+2
Graph the two inequalities,
The region shaded in black satisfies both inequalities
12 charms representing the 12 months of the year are attached in order on to a chain bracelet find the probability that the clasp is between the charms of June and July include a diagram with your solution
There are 11 possible positions for the clasp, as it can be between any two adjacent charms. If we want the clasp to be between the charms of June and July, we need to count how many of these positions satisfy this condition.
Since there are 12 charms in total, we can arrange them in 12! ways. However, since the order of the charms doesn't matter except for the position of the clasp, we need to divide by 12 to account for the different arrangements of the same set of charms.
Now, we can fix the charms of June and July in their correct positions, which leaves us with 10 remaining charms to arrange. There are 10! ways to do this. However, since we want the clasp to be between the charms of June and July, we need to treat them as a single block and arrange the 10 remaining charms and this block. There are 11 ways to do this.
Therefore, the total number of arrangements where the clasp is between the charms of June and July is 11 × 10!.
The probability of the clasp being between the charms of June and July is:
P = (number of favorable outcomes) / (total number of possible outcomes)
= (11 × 10!) / (12!)
= 11/66
We can represent the possible positions of the clasp using a diagram as follows:
Charm 1 - Charm 2 - Charm 3 - Charm 4 - Charm 5 - Charm 6 - Charm 7 - Charm 8 - Charm 9 - Charm 10 - Charm 11 - Charm 12
|---------------------|
Please provide the answer
Answer:
your answer is the second one.
A grain silo has a cylindrical shape. Its diameter is 19ft, and its height is 49ft . What is the volume of the silo? Use the value 3.14 for pi , and round your answer to the nearest whole number. Be sure to include the correct unit in your answer.
The Volume of Silo is. V= 13886 ft cube
A grain Silo is cylindrical in shape.
Height (h) = 49 ft.
Diameter (d) = 19 ft.
We need to find the Volume of silo.
We will first find the radius.
Radius can be given as half of the diameter.
hence Radius (r) = 9.5
Since Silo is in Cylindrical Shape we will find the volume of a cylinder.
Now We know that the Volume of a cylinder can be calculated by multiplying π with the square of the radius and height.
Volume of Cylinder = πr²h
V= 3.14×9.5×9.5×49
v=13885.865 ft cube
Rounding to the nearest whole number we get;
Hence, the Volume of the Silo is. V= 13886 ft cube
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what is the result of 4:3x
Answer:
Step-by-step explanation:
-5
On a truck, one windshield wiper blade is 80 centimeters long and is connected to a swing arm that is 90 centimeters long from the pivot point to the tip, as shown below. If the swing arm rotates the wiper blade is 120, what is the area of the windshield that is swept by the wiper blade? round your answer to the nearest tenth of a square centimeter
The area of the sector rounding to the nearest tenth is C. 8377.6 [tex]cm^2[/tex].
What is law of cosines?The law of cosines is a formula used to find the length of a side or the measure of an angle in a non-right triangle (a triangle that does not have a 90-degree angle).
According to given information:
To find the area of the windshield swept by the wiper blade, we can consider it as a sector of a circle with radius equal to the length of the segment swept by the wiper blade. The length of this segment can be found using the law of cosines:
[tex]c^2 = a^2 + b^2 - 2ab cos(C)[/tex]
where a and b are the lengths of the sides adjacent to the angle C, and c is the length of the side opposite to the angle C.
In this case, we have:
a = 80 cm (length of the wiper blade)
b = 90 cm (length of the swing arm)
C = 120 degrees (angle swept by the swing arm)
Substituting these values, we get:
[tex]c^2 = 80^2 + 90^2 - 2(80)(90)cos(120)[/tex]
[tex]c^2[/tex] ≈ [tex]20418[/tex]
[tex]c[/tex] ≈ [tex]142.8 cm[/tex]
So the radius of the circle is approximately 142.8 cm. The central angle of the sector is 120 degrees, so its measure in radians is 2π/3. Therefore, the area of the sector is:
A = (1/2) * [tex]r^2[/tex] * θ
A = (1/2) * [tex](142.8)^2[/tex] *[tex](2\pi /3)[/tex]
A ≈ 8377.6 [tex]cm^2[/tex]
Rounding to the nearest tenth, we get the answer as C. 8377.6 [tex]cm^2[/tex].
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Learning Task 2 : Find the area of each shaded region. Assume that all angles that appear to be right triangle (3 points each).
Step by step answer
PLS
Answer:
Step-by-step explanation:
1●area of shaded region = area of big rectangle -area of small rectangle
=(12×7)-(8×3)
=84-24
=60ft²
2● Area of shaded region =sum of area of all three rectangle
=9×3.5+9×3.5+16×7
=63+112
=175ft²
Answer:
Step-by-step explanation:
Formula of a square Area=[tex]x^{2}[/tex]
1)Area of a Rectangle =l*w
area=(12)(7)
=84 ft
solution for the area non shaded=(8)(3)
= 24 ft
solution for area shaded=84-64
=60 ft
Question 3 In a science class everyone study Physics, Chemistry, Biology or combination of any of the three courses. 22 students study Physics and Biology, 21 students study Chemistry and Biology, 18 students study Chemistry and Physics. If only 6 students study pure Chemistry (15 marl 10 students study pure Physics and 8 students study pure Biology, then; a) Find the total number of students in the class.
Answer:
Step-by-step explanation:
Let's use a Venn diagram to help us visualize the information given in the problem. We can start with three overlapping circles representing Physics (P), Chemistry (C), and Biology (B), and then fill in the numbers given:
P
/ \
/ \
/ \
CP BP
\ /
\ /
\ /
B
We know that 6 students study pure Chemistry, so we can write this number in the circle for Chemistry (C). We also know that 10 students study pure Physics and 8 students study pure Biology, so we can write these numbers in the circles for Physics (P) and Biology (B), respectively:
P (10)
/ \
/ \
/ \
CP (18) BP (21)
\ /
\ /
\ /
B (8)
C (6)
Now we can use the information given in the problem to fill in the remaining numbers:
22 students study Physics and Biology, so this number goes in the overlap between P and B: PB = 22
21 students study Chemistry and Biology, so this number goes in the overlap between C and B: CB = 21
We don't know the number of students who study Physics and Chemistry only, but we can use the fact that 6 students study pure Chemistry to figure it out. Since 18 students study Chemistry and Physics in total, and 6 of them study pure Chemistry, the remaining 18 - 6 = 12 students must study both Chemistry and Physics but not Biology. We can write this number in the overlap between C and P: CP = 12.
P (10)
/ \
/ \
/ \
CP (12) BP (21)
\ /
\ /
\ /
B (8)
C (6)
Now we can find the total number of students by adding up all the numbers in the Venn diagram:
Total = P + C + B - (CP + CB + PB) + (CPB)
Total = 10 + 6 + 8 - (12 + 21 + 22) + 0
Total = 19
Therefore, the total number of students in the class is 19.
What is the solution to 38.4 = 2x
Answer:
19.2
Step-by-step explanation:
You want the solution to 38.4 = 2x.
One-step linear equationWhen you divide both sides of the equation by 2, you will have your answer.
38.4/2 = (2x)/2
19.2 = x
The solution to the equation is x = 19.2.
__
Additional comment
When you learned multiplication and division, you learned that each multiplication fact corresponds to two division facts:
A = B×C . . . . . . . 6 = 2×3
A/B = C . . . . . . . . 6/2 = 3
A/C = B . . . . . . . . 6/3 = 2
We use that relationship here to find the value of one of the factors in the product:
38.4 = 2·x
38.4/2 = x
The other division fact is still true, but isn't useful here for finding the value of x.
38.4/x = 2
Laura correctly determines four arithmetic means between −17 and 32.
What values does Laura determine?
A - Laura determines the four arithmetic means to be −7.2, 2.8, 12.4, and 22.4.
B - Laura determines the four arithmetic means to be −7.2, 2.6, 12.6, and 22.4.
C - Laura determines the four arithmetic means to be −7.2, 2.8, 12.6, and 22.2.
D - Laura determines the four arithmetic means to be −7.2, 2.6, 12.4, and 22.2.
The correct answer is option C: Laura determines the four arithmetic means to be −7.2, 2.8, 12.6, and 22.2.
What is arithmetic sequence?
An arithmetic sequence is a sequence of numbers in which each term after the first is found by adding a fixed constant number, called the common difference, to the preceding term.
To determine the arithmetic means between two numbers, we need to find the common difference between each pair of consecutive means. The common difference is given by:
Common difference = (larger number - smaller number) / (number of means + 1)
In this case, the larger number is 32 and the smaller number is -17. Laura wants to find four means, so the number of means is 4. Therefore, the common difference is:
Common difference = (32 - (-17)) / (4 + 1) = 49 / 5 = 9.8
To find the four arithmetic means, we start with the smaller number and add the common difference successively. Therefore, the four arithmetic means are:
-17 + 9.8 = -7.2
-7.2 + 9.8 = 2.6
2.6 + 9.8 = 12.4
12.4 + 9.8 = 22.2
Therefore, the correct answer is option C: Laura determines the four arithmetic means to be −7.2, 2.8, 12.6, and 22.2.
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|x+8|=x+8 what is x?
ANSWER PLEASE
Answer:
x=8
Step-by-step explanation:
|x+8|=x+8
x+8=x+8
x^2+8=8
x^2=16
√x^2=√16
x=8
David has a 32 ounce energy drink he drinks 10 ounces Enter the percentage of Ounces he has left of his energy drink.
Answer:
He has 68.8% of his drink left
Step-by-step explanation:
do 32 oz - 10 oz = 22 oz to get how much of his drink is left
To get the percentage, just do what left divided by original amount
so 22/32 = 0.6875 and in percent, that is about 68.8%
What was the cost for 100 shares at the 52-Week Low?
A. $5228
B. $6433
C. $6523
D. $6720
The cost for 100 shares at the 52-Week Low is $5228. Therefore the correct option is option A.
We need to look at the table or chart that shows the data on stock prices at the 52-week low in order to respond to this question. The question alone does not provide the response.
After gaining access to the table, we may calculate the price for 100 shares by multiplying the price for 1 share at the 52-week low by 100.
Let's use $52.28 as an example of the price per share at the 52-week low. The price for 100 shares would be as follows:
$52.28 x 100 = $5,228
Thus, $5228 is the correct response (A).
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Solve: x2 + 5x − 9 = 0
The area of the base of a rectangular prism is 18 cm2
. The height of the prism is 912
cm. What is the volume of the prism?
Answer: 171
Step-by-step explanation:
Bertrand invites 21 people to his party and wants to give each guess 3 party favors. If n is the total number of party favors he will need to order, the equation that represents this situation n/21=3
The number οf favοurs that Bertrand needs tο buy is 63
Algebraic equatiοn:An algebraic equatiοn is a mathematical statement that uses οne οr mοre variables and mathematical οperatiοns tο describe a relatiοnship between thοse variables.
Algebraic equatiοns are cοmmοnly used in mathematics, science, engineering, and οther fields tο mοdel real-wοrld phenοmena, sοlve prοblems, and make predictiοns.
Here we have
Bertrand invites 21 peοple tο his party and wants tο give each guest 3 party favοrs.
If n is the tοtal number οf party favοrs he will need tο οrder,
The equatiοn that represents this situatiοn is: n/21 = 3
Where n is the tοtal number οf party favοrs Bertrand will need tο οrder, and 3 represents the number οf party favοrs each guest will receive.
On sοlving the equatiοn will get
=> n/21 = 3
Multiply with 21 οn bοth sides
=> 21(n/21) = 21 × 3
=> n = 63
Therefοre, The number οf favοrs that Bertrand needs tο buy is 63
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what is the volume of 1 1/2 and 1 and 3 3/4
Answer: 5.625 Cubed
Step-by-step explanation: First you will times 3.75 and 1.5. Which should get you 5.625 squared. Next you will just times 5.625 squared by 1. Which will get you 5.625 cubed.
cant answer this question
The value of k, considering the numeric value of the derivative at x = 0, is given as follows:
b) k = -2 or k = 2.
How to obtain the value of k?The function in the context of this problem is defined as follows:
y = (x + k)³.
Applying the power of x rule followed by the chain rule, the derivative of the function is given as follows:
y' = 3(x + k)².
When x = 0, the numeric value of the derivative is of 12, hence the value of k is obtained as follows:
3k² = 12
k² = 4
k = -2 or k = 2.
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5 A teacher needs to buy batteries for 32 calculators. ● There are 20 basic calculators that each require 3 batteries. There are 12 advanced calculators that each require 4 batteries. The batteries are sold in packages of 24. The teacher thinks that 6 packages of batteries will be needed and that there will be 12 batteries left over after the calculators are filled. Provide a solution path that shows whether the teacher is correct or incorrect. Explain what each step in the solution path represents in terms of the situation. Enter your answer and your work or explanation in the space provided.
Answer: The teacher is incorrect
Step-by-step explanation: 20x3=60 4x12=48 60+48=108 108/24=4.5
4.5 does not equal 6. 5 packs of battery's will be needed and there will be 12 battery's left over.
please help asap. the question/problem is in the question
To draw a scatter plot we will determine the plot's x and y axis. We can specify the scale for each axes and finally plot the points.
A scatter plot is what?Data can be graphically represented using a scatter plot. The Coordinate axes are used in a straightforward scatter plot to plot the points according to their values.
To create a scatter plot, follow these three easy steps.
Determine the scatter plot's x- and y-axes in step one.
Specify the scale for each of the axes in STEP II.
Plot the points based on their values in Step 3.
Now here in the question,
We will draw a scatter plot using the data given in the table.
The graph is attached to the answer.
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What is the best way to display data on the average temperature each month?
A.) Histogram
B.) Circle graph
C.) Line graph
D.) frequency tabel
Answer:
A line graph would best show the average temperatures each month
A wheel of radius 21 ft. is rotating 13 RPM counterclockwise. Considering a point on the rim of the rotating wheel, what is the angular speed in rad/sec and the linear speed v in ft/sec?
Angular speed is approximately 1.36 rad/sec and the linear speed of a point on the rim of the rotating wheel is approximately 28.56 ft/sec.
How to calculate the angular speed and linear speed of a point on the rim of the rotating wheel?
The angular speed of the rotating wheel in rad/sec is given by:
angular speed = 2π × RPM / 60
where RPM is the revolutions per minute. we get:
angular speed = 2π × 13 / 60
≈ 1.36 rad/sec
The linear speed of a point on the rim of the rotating wheel in ft/sec is given by:
linear speed = radius × angular speed
where radius is the radius of the wheel. we get:
linear speed = 21 ft × 1.36 rad/sec
≈ 28.56 ft/sec
Therefore, the angular speed of the rotating wheel is approximately 1.36 rad/sec and the linear speed of a point on the rim of the rotating wheel is approximately 28.56 ft/sec.
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Which statement best describes the mean of the data listed below? 10, 7, 9, 5, 8, 6, 7, 3, 10, 5, 7 Responses The middle value of the ordered data set is 7. The middle value of the ordered data set is 7. The value that occurs most often in the set is 7. The value that occurs most often in the set is 7. The difference between the smallest value and the largest value is 7. The difference between the smallest value and the largest value is 7. The sum of all the data values divided by the number of data values is 7. The sum of all the data values divided by the number of data values is 7.
Answer: The sum of all the data values divided by the number of data values is 7.
Find the LCD of the given rational equation:
2x
x²-25 6x+30
+
-3 8
-
6x
OA. (x+5)(x-5)
OB. (x2-25)(6x+30)(6x)
OC. 6x(x+5)(x - 5)
OD. -48x
The LCD of the given rational function is option B (x²-25)(6x + 30)(6x).
What is rational equation?An equation containing one or more rational expressions is referred to as a rational equation. A fraction with polynomials as the numerator and denominator is known as a rational expression. A rational expression is, in other words, the ratio of two polynomials. Finding the LCD (Least Common Denominator) of the fractions, removing the denominators, and then simplifying the resultant equation can be used to solve rational equations. By resolving the resultant equation, which may require factoring, simplification, or the use of other algebraic strategies, the solutions of rational equations can be discovered. In order to simulate complicated systems and events, rational equations are frequently employed in physics, engineering, and other disciplines.
For the given rational equation the LCD will be the multiplication of all the denominators in the given rational equation.
Thus,
(x²-25)(6x + 30)(6x)
Hence, the LCD of the given rational function is option B (x²-25)(6x + 30)(6x).
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Which of the following are polyhedra?
A. Pyramid
OB. Sphere
OC. Pentagonal prism
D. Cube
DE. Cylinder
OF. Cone
Answer:
Answer: A, C, D, and F are polyhedra.
Chain of thought reasoning:
A. Pyramid: A pyramid is a polyhedron because its base is a polygon with four or more sides and its associated faces are triangles. Therefore, Pyramid (A) is a polyhedron.
B. Sphere: A sphere is not a polyhedron because it is not composed of flat faces connected at straight edges, thus it does not form a shape with flat faces and straight edges. Therefore, Sphere (B) is not a polyhedron.
C. Pentagonal prism: A pentagonal prism is a polyhedron because its base is a polygon with five sides and its associated faces are also polygons, resulting in a shape with flat faces and straight edges. Therefore, Pentagonal Prism (C) is a polyhedron.
D. Cube: A cube is a polyhedron because both its bases and its associated faces are polygons with four sides, resulting in a shape with flat faces and straight edges. Therefore, Cube (D) is a polyhedron.
E. Cylinder: A cylinder is not a polyhedron because it is not composed of flat faces connected at straight edges, thus it does not form a shape with flat faces and straight edges. Therefore, Cylinder (E) is not a polyhedron.
F. Cone: A cone is a polyhedron because its base is a polygon with three or more sides and its associated faces are circles or triangle, resulting in a shape with flat faces and straight edges. Therefore, Cone (F) is a polyhedron.