Between Kalamazoo to Ann Arbor, the actual driving distance is roughly 62.5 miles.
How to use scale factors to measure lengths?The ratio of one object's scale to that of a new object, which has its representation but is larger, is known as a scale factor (bigger or smaller). By multiplying each side by a certain number, say 2, we can increase the size of a rectangle with sides of 2 cm and 4 cm.
The scale factor and the in-scale distance are combined to create the true distance. The scale factor is 50 miles per centimeter, and the in-scale distance is roughly 1.25 centimeters, as seen in the picture. So, this is how far Kalamazoo is from Ann Arbor really is:
[tex]& d \approx\left(50 \frac{\mathrm{mi}}{\mathrm{cm}}\right) \cdot(1.25 \mathrm{~cm}) \\[/tex]
[tex]& d \approx 62.5 \mathrm{mi}[/tex]
The actual distance in miles between Kalamazoo and Ann Arbor is about 62.5.
The complete question is:
Use the map and the provided ruler to find the actual distance between cities. The actual distance between Kalamazoo and Ann Arbor is ___ miles.
To learn more about scale factors, refer to:
https://brainly.com/question/2826496
#SPJ1
Match each feature of the graph with
the corresponding coordinate point.
If the feature does not exist, choose
"none".
none
(0,7)
Algebra Kantner/Selm-Spring23/Unit 4-Functions
(1.5, 2)
(4,16)
height (feet)
20
16
Choices
Il vertical intercept
II maximum
8
4
horizontal intercept
minimum
3 4 5 6 7
time (seconds)
Each feature of the graph should be matched with the corresponding coordinate point as follows:
Maximum ⇒ (4, 16).Minimum ⇒ (1.5, 2).Vertical intercept ⇒ (0, 7).Horizontal intercept ⇒ none.What is the vertical intercept?In Mathematics, the vertical intercept (y-intercept) of any graph such as a quadratic function or an exponential function, generally occur at the point where the value of "x" is equal to zero (x = 0).
By critically observing the graph which represents the function (see attachment), we can logically deduce that the vertical intercept (y-intercept) is equal to the ordered pair (0, 7).
Additionally, the maximum point of any graph is the point where the graph is at the highest point, which is equal to the ordered pair (4, 16) while the minimum point of any graph is the point where the graph is at the lowest point, which is equal to the ordered pair (1.5, 2).
In conclusion, there is no horizontal intercept (x-intercept) on this graph.
Read more on y-intercept here: brainly.com/question/6240745
#SPJ1
a bin of 50 parts contains 5 that are defective. a sample of 10 parts is selected without replacement. how many samples contain at least 4 defective parts?
A bin of 50 parts contains 5 that are defective and a sample of 10 parts is selected without replacement, then total 40,753,713 samples contain at least 4 defective parts.
A bin of 50 parts contains 5 that are defective.
A sample of 10 parts is selected without replacement.
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = Samples with precisely 4 defectives + samples with precisely 5 defects
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = [tex]^{5}C_{4}\cdot ^{45}C_{6}+ ^{5}C_{5}\cdot^{45}C_{5}[/tex]
Using the formula [tex]^nC_{r} = \frac{n!}{r!(n-r)!}[/tex]
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = [tex]\frac{5!}{4!(5-4)!}\cdot\frac{45!}{6!(45-6)!}+\frac{5!}{5!(5-5)!}\cdot\frac{45!}{5!(45-5)!}[/tex]
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = [tex]\frac{5!}{4!1!}\cdot\frac{45!}{6!39!}+\frac{5!}{5!0!}\cdot\frac{45!}{5!40!}[/tex]
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = [tex]\frac{5\times4!}{4!\times1}\cdot\frac{45\times44\times43\times42\times41\times40\times39!}{6\times5\times4\times3\times2\times1\times39!}+1\cdot\frac{45\times44\times43\times42\times41\times40!}{5\times4\times3\times2\times1\times40!}[/tex]
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = 5 × 15 × 44 × 43 × 7 × 41 + 1 × 9 × 11 × 7 × 41
Number of samples of size 10 from 50 pieces, at least 4 of which are faulty = 40,753,713
To learn more about sample link is here
brainly.com/question/13287171
#SPJ4
9. Triangles ACD and BCD are isosceles. Angle DBC has a measure of 110 degrees and angle BDA has a measure of 22 degrees. Find the measure of angle BAC.
In an isosceles triangle, if Angle DBC has a measure of 110 degrees and angle BDA has a measure of 22 degrees, then the measure of angle BAC is 48 degrees.
What is an isosceles triangle?A triangle with two equivalent sides and angles with equal measures on opposing sides is said to be isosceles.
Triangle BAC's angles should be labelled as follows:
Angle BAC = x
Angle ABC = y
Angle BCA = z
Because a triangle's angles sum up to 180 degrees,
x + y + z = 180
As ACD and BCD are isosceles triangles,
angle DBC = angle DCB = 110 degrees
Because BDA and DBC are a pair of linear angles,
angle BDA + angle DBC = 180 degrees
Using values for angles DBC and BDA and substituting them,
22 + 110 = 180
By finding y,
y = 180 - 22 - 110
When the value of y is substituted in the equation x + y + z = 180,
x + (180 - 22 - 110) + z = 180
Solving for x,
x = 180 - (180 - 22 - 110) - z
Substituting the value of z = 180 - (22 + 110),
x = 180 - (180 - 22 - 110) - (180 - 22 - 110)
To know more about isosceles triangle, visit
brainly.com/question/2456591
#SPJ1
1 .Find the Product of Prime factors 1352.
2. Find the L.C.M of 10 and 12.
The Prime Factors of 1352 are: 2, 2, 2, 13, 13.
What is Prime factors?The breakdown of a composite number into a sum of smaller integers is known as integer factorization in number theory. By repeatedly dividing a number by prime factors until the remainder equals one, the simplest method for determining a number's prime factors is to keep going till we have the answer. For instance, when we factor a number by its prime factors, we obtain 30/2 = 15, 15/3 = 5, and 5/5 = 1. It cannot be further factored because we received the leftover money.The Prime Factor Tree's Prime Factor Tree only uses prime numbers that are prime factors of 1352. The math is illustrated below:352 ÷ 2 = 676
676 ÷ 2 = 338
338 ÷ 2 = 169
169 ÷ 13 = 13
13 ÷ 13 = 1
Again, all the prime numbers you used to divide above are the Prime Factors of 1352. Thus, the Prime Factors of 1352 are: 2, 2, 2, 13, 13.
To learn more about Prime factors refer to:
https://brainly.com/question/18187355
#SPJ1
-1/4 + 1/12 - 1/8b + 13/24
The simplified expression is equal to 13/24 - 3/8b.
What do you mean by algebraic expression?It represents a value that can change, depending on the values of the variables.
For example, "2x + 3" is an algebraic expression. The variable x can take on any value, and the expression represents a value that is the result of adding 2 times x to 3. When x is equal to 5, the expression equals 2 * 5 + 3 = 13.
Algebraic expressions can be combined using the operations of addition, subtraction, multiplication, and division to form more complex expressions. They can also be simplified by combining like terms or using the distributive property.
Algebraic expressions are an important tool in mathematics, and are used in many areas including science, engineering, and economics. They can be used to model and understand complex systems, and to make predictions and analyze data.
The expression -1/4 + 1/12 - 1/8b + 13/24 can be simplified by finding the common denominators and adding the numerators:
-1/4 + 1/12 - 1/8b + 13/24 = (3 * -1/12) + (3 * 1/12) - (3 * 1/8b) + (3 * 13/72) = 3 * (-1/12 + 1/12 - 1/8b + 13/72) = 3 * (13/72 - 1/8b) = 13/24 - 3/8b.
So, the simplified expression is equal to 13/24 - 3/8b.
To know more about expression visit:
https://brainly.com/question/24242989
#SPJ1
Which ratios have a unit rate greater than 17 Choose ALL that apply.
1
4 miles: 3 hours
miles: hour
6
915
miles: 3 hours
miles: 3 hours
3
7 miles:-hour
4
S
mile: 2 hours
8
Answer:
4 miles: 3 hours has a unit rate of 4/3 = 1.33 miles/hour which is greater than 17
7 miles: 1 hour has a unit rate of 7 miles/hour which is greater than 17.
which is the graph of y=^x-5-1?
Answer: its D
Step-by-step explanation: js trust mee :)
3.1b | Checking for Understanding
1. State the domain and the range for the following relation
{(a, g), (t, c), (s, g), (k, w), (j, k), (p, p)}
The domain and the range for the relation is {a, t, s, k, j, p} and {g, c, g, w, k, p} respectively.
What is domain and range?The range of values that we are permitted to enter into our function is known as the domain of a function.
The x values for a function like f make up this set (x).
A function's range is the collection of values it may take as input. The values in this set
Hence, once we input an x value, the function returns. The y values are those.
The domain is the input values or the x-coordinates. Hence the domain for the given relation is:
{a, t, s, k, j, p}
The range is the output value or the y-coordinate. Hence, the range of for the given relation is:
{g, c, g, w, k, p}
Hence, the domain and the range for the relation is {a, t, s, k, j, p} and {g, c, g, w, k, p} respectively.
Learn more about domain here:
https://brainly.com/question/28135761
#SPJ1
Read Wild: From Lost to Found on the Pacific Crest Trail.
Questions below.
THINK QUESTIONS
1. What can you infer about how Strayed prepared
to hike the Pacific Crest Trail? What resources
did she bring with her, and how did she plan to
sustain herself? Consider the time and thought
that might have gone into her planning. Use
textual evidence to support your response
4.
Step-by-step explanation:
From "Wild: From Lost to Found on the Pacific Crest Trail," it can be inferred that Strayed prepared extensively for her hike on the Pacific Crest Trail. She researched the trail and gathered information from books, maps, and other hikers who had completed the trail. She also purchased and outfitted herself with necessary gear, such as a backpack, hiking boots, and camping equipment. She planned to sustain herself by carrying food and supplies and re-supplying at towns along the trail. Strayed also took steps to physically prepare herself, such as training by hiking in the local mountains. She also mentions the time and thought she put into the planning and preparation, stating "I'd spent months getting ready" (chapter 2).
Please help:
I think of a number. If I subtract 10 from my number, then square the result, I get the same answer as if I square my number, then subtract 10 from the result.
What is my number?
You must show an algebraic method ( use letter x in your working).
The number you think is 5.5
How to find the number?
An algebraic expression is an expression that is made up of variables and constants, along with algebraic operations like addition, subtraction, square root, etc.
Let x represent the number you think. Thus, we can write:
(x - 10)² = x²-10
x² - 20x + 100 = x²-10
-20x + 100 = -10
20x = 100 + 10
20x = 110
x = 110/20
x = 5.5
Learn more about algebraic expressions on:
brainly.com/question/4344214
#SPJ1
Juan claims the function y =3+2 exponent 3 square root x-1
Need answer to question down below :)
y = 3 + 2[tex](3\sqrt{x} -1)[/tex] is a quadratic function.This function represents a real-valued function that maps a real number x to the real number y.
What is a quadratic function?The graph of a quadratic function is called a parabola and has a curved shape. One of the main points of a parabola is its vertex. It is the highest or the lowest point on its graph
A quadratic function is one of the form f(x) = ax² + bx + c, where a, b, and c are numbers with a not equal to zero. The graph of a quadratic function is a curve called a parabola. Parabolas may open upward or downward and vary in "width" or "steepness", but they all have the same basic "U" shape.
The function y = 3 + 2[tex](3\sqrt{x} -1)[/tex] can be explained as follows:
The first part of the function, "3" is a constant that is added to the result of the next part of the function.The next part of the function, "2[tex](3\sqrt{x} -1)[/tex]," represents an exponential expression. Here, the base is "2" and the exponent is "3√x - 1."The exponent, "3√x - 1," represents the square root of x, multiplied by 3 and then subtracted by 1. This means that the value of x is first evaluated under the square root, then multiplied by 3, and finally subtracted by 1.So, the entire function "y = 3 + 2[tex](3\sqrt{x} -1)[/tex]" can be read as: "y is equal to 3, plus 2 raised to the power of 3 times the square root of x, minus 1."To learn more about quadratic function refers to:
brainly.com/question/1214333
#SPJ1
Kim has health insurance with a deductible of $500 and an 80/20 coinsurance. How much will she pay if she incurs a loss of $1,500?
a.$200
b.$500
c.$700
d.$1,300
If Kim has health insurance with a deductible of $500 and 80/20 coinsurance then amount she pay if she incurs a loss of $1500 is (c)$700 .
In an 80/20 coinsurance, the insurance company pays 80% of covered expenses after the deductible has been met, and the policyholder is responsible for paying the remaining 20%.
So , if Kim incurs a loss of $1500, she first needs to pay the $500 deductible before her insurance kicks in. After that, she will pay for 20% of the remaining $1000 in covered expenses:
⇒ 20% of $1,000 = $200
So, in total, Kim will pay $500 for the deductible plus $200 in coinsurance, for a total of:
⇒ $500 + $200 = $700
Therefore, If Kim will pay (c) $700.
Learn more about Coinsurance here
https://brainly.com/question/28463232
#SPJ4
A car traveled a distance of 600.15 km in 7.5 hours. How many kilometers did the car travel per hour on the average?
Answer:
Step-by-step explanation:
600.15/ 7.5 = 80.02
BRAINLIEST!!! CORRECT ANSWERS ONLY
-x+y=14
2x+y=-7
Solve both.
Answer:
see below
Step-by-step explanation:
-x+y=14 --> so x=y-14
2x+y=-7 put x in here
2(y-14)+y =-7
2y-28+y = -7
3y =21
y=7
x= y - 14 = -7
Please help me figure out what the last one is and how to get the answer
Tysm!
A triangle can be formed.
Value that goes in the box is [tex]31\frac{3}{4}[/tex]
It's the same as the first angle mentioned. The value doesn't change.
=====================================================
Explanation:
3/4 = 0.75
1/2 = 0.50
The three given angles in decimal form are:
31.7553.5094.75If these angles add to 180 degrees, then a triangle can be formed.
31.75+53.50+94.75
85.25+94.75
180
So, 31.75+53.50+94.75 = 180 is definitely the case.
Therefore, a triangle can be formed.
You'll type the mixed number [tex]31\frac{3}{4}[/tex] into the box which was that first angle mentioned.
the proportion of women in the sample who do not smoke while pregnant is about .85. does this help reconcile your finding from part (iii)?
Yes, it does reconcile my finding from part iii.
The finding that the number of cigarettes smoked being -10 to predict a birth weight of 125 ounces is unrealistic could be due to the fact that the model doesn't take into account other factors that could impact the weight of the child. The high proportion (85%) of women in the sample who don't smoke during pregnancy supports this conclusion, as it suggests that there may be other factors contributing to the weight of the child.
Key points:
Birth weight prediction: Birth weight is a crucial factor in determining the health and well-being of a newborn baby. It is important to accurately predict birth weight so that medical professionals can prepare for potential complications.Factors influencing birth weight: There are several factors that can impact birth weight, including maternal health, genetics, maternal age, and lifestyle factors such as smoking, alcohol consumption, and diet.The role of smoking: Smoking during pregnancy has been linked to a reduction in birth weight. This is because chemicals from tobacco smoke can cross the placenta and harm the developing fetus.Model limitations: The model used to predict birth weight may not take into account all the factors that could impact birth weight, such as the presence of other health conditions or genetics. In addition, the sample size used to train the model may not be representative of the general population, leading to biases in the predictions.Importance of considering other factors: To obtain accurate predictions of birth weight, it is important to consider not just smoking but all the factors that could impact birth weight. This includes maternal health, genetics, and lifestyle factors, among others.Learn more about Birth weight prediction here:
https://brainly.com/question/29009821
The complete question is:
(iii) According to the model, in order to predict a birth weight of 125 ounces, the number of cigarettes smoked would have to be -10. This is not realistic as the model describes that the average birth weight of the child when the mother is not a smoker is only 119.77 ounces. This could be because the model doesn't take into account the influence of other factors in predicting the weight of the child.
The proportion of women in the sample who do not smoke while pregnant is about 85%. Does this reconcile your finding from part iii?
#SPJ4
a particle is oscillating in one dimension, with a position given by =cos(2) . how many seconds elapse between turning points? give your answer to the nearest hundredth.
After finding the time period of particle, time elapsed between turning points is 1.57 seconds.
A particle is oscillating in one dimension, with a position by x=cos(2t).
The general equation of simple harmonic equation is
x = Acos(ωt)
At t = 0 the particle is at x =1.
On comparing ω = 2
Time period of the particle = 2π/ω
Now putting the value
Time period of the particle = 2π/2
Time period of the particle = π seconds
Thus, the particle takes half the time to get from one extreme to another, which is a turning point.
So, Time elapsed = π/2 seconds
Time elapsed = 3.14/2 seconds
Time elapsed = 1.57 seconds
To learn more about simple harmonic motion link is here
brainly.com/question/2195012
#SPJ4
The complete question is:
A particle is oscillating in one dimension, with a position given by x=cos(2t). How many seconds elapse between turning points?
What is the surface area of a cylinder with base radius 4 and height 5 either enter an exact answer in terms of T or use 3.14 for T and enter your answer as a decimal?
Answer:
see below
Step-by-step explanation:
area of a cylinder = top circle + bottom circle + lateral
r=4 h=5
lateral = perimeter of the circle * height = 2π*4 * 5 =40π
area of a circle = πr² = 16π
top & bottom =32π
total = 40π+32π =72π = 226.08
The surface area of a cylinder exists 72π square units.
How to find the surface area of a cylinder?A cylinder's surface area is equal to two times the sum of its side and base areas.
Let the equation be
Surface area = 2(base area) + (side area)
The Base area of the equation be
Base area = πr²
When r = 4,
substitute the values in the above equation, we get
Base area = π(4)²
simplifying the equation, we get
Base area = 16 π
side area = 2πrh
side area = 2π × 4 × 5
side area = 40π
The Surface area of the equation be
Surface area = 2(base area) + (side area)
substitute the values in the above equation, we get
surface area = 2 × (16 π) + 40π
simplifying the equation, we get
surface area = 32π + 40π
surface area = 72π
Therefore, the surface area exists 72π square units.
To learn more about surface area of cylinder refer to:
https://brainly.com/question/10332927
#SPJ4
If $0.25 per pound is the current price for aluminum at the recycling center, how many pounds of empty cans will the class have to collect?
Please ASAP
Using mathematical operations, we can determine that the class will need to gather 200 pounds of empty cans if the recycling center's pricing for aluminum is $0.25 per pound.
What are mathematical operations?Calculating a value using operands and a math operator is referred to as performing a mathematical "operation."
The math operator's symbol has predetermined rules that must be applied to the supplied operands or numbers.
PEMDAS stands for Parentheses, Exponents, Multiplication, Division, and Addition and Subtraction (from left to right).
So, the book will cost us $50.
CP of aluminum is $0.25 per pound.
Then,
Number of pounds that will make is $50:
Number of pounds: 50/0.25
Number of pounds: 200
Therefore, using mathematical operations, we can determine that the class will need to gather 200 pounds of empty cans if the recycling center's pricing for aluminum is $0.25 per pound.
Know more about mathematical operations here:
https://brainly.com/question/20628271
#SPJ1
Complete question:
Ken's seventh grade class plans to collect empty aluminum pop cans as a fund raiser to buy two new books for the school library. The books will cost a total of $50.
If $0.25 per pound is the current price for aluminum at the recycling center, how many pounds of empty cans will the class have to collect? (3 points)
PLease guys I need help and I need to get my grade up!
This one shouldn't be too hard! :)
A diameter of a circle is just the total distance across the circle.
The two dots that stretch ALLLLL the way across the circle are dots R to S
Your answer is The third one RS
Hope this helps!
A cubic function of the form y = ax³ + bx² + cx+d yields the following table:
xy
0,0
1,-4
2,-26
3,-48
The coefficient a =
and d=
b=
c=
Answer: a = -3.25, b = -4, c = 0.5 and d = -4
Step-by-step explanation:
To find the coefficient of a cubic function, we can use the values in the given table to set up a system of equations and then solve for the unknowns.
Here is the system of equations we can set up using the values in the table:
y = ax^3 + bx^2 + c*x + d
0 = 0a + 0b + 0c + d
-4 = 1a - 4b + 1c + d
-26 = 8a - 4b + 2c + d
-48 = 27a - 4b + 3c + d
We can then solve this system of equations using matrix operations or Cramer's rule.
a = -26/8 = -3.25
b = -4
c = -26-8a = -26+26.5 = 0.5
d = -48-27a-4b-3c = -48+91.75-44-30.5 = -4
Therefore, the coefficient a = -3.25, b = -4, c = 0.5 and d = -4 for the cubic function y = ax³ + bx² + cx+d
It's important to note that this method of solving a system of equations is the most common way but not the only way to get the coefficients in this case.
if mbdc = 3 (x – 5) and m arc bc = x 25, what is ma?
Ma = 3x - 15, since mbdc = 3(x - 5) and m arc bc = x 25. Therefore, ma = 3x - 15, which is the product of 3 times (x-5).
To solve for ma, we need to start with the given information. We are given that mdbc = 3(x - 5) and m arc bc = x 25. We can start by expanding mbdc. We know that mbdc = 3(x - 5). This can be expanded by multiplying each term in the parenthesis by 3. We get mbdc = 3x - 15. We can then use this information to solve for ma. We know that ma = mbdc - m arc bc. Plugging in the values we found for mdbc and m arc bc, we get ma = 3x - 15. This is the product of 3 times (x - 5). Therefore, ma = 3x - 15.
Learn more about arc here
https://brainly.com/question/20294211
#SPJ4
the oppertunity cost of earning an advanced college degree is that
The opportunity cost is that the person will earn less money during the years that you are in college.
What is opportunity cost?Opportunity cost is the potential-forgone profit from a missed opportunity as the result of choosing one alternative and forgoing another.
The advantages of opportunity cost :-
Opportunity cost has to do with one forgoes when one makes a different choice. For example, if there's a choice between going to school and playing football, and the person goes to school, the opportunity cost is the fun that one will have enjoyed while playing football.The opportunity cost of earning the advanced college degree will be that the person will earn less money during the years that you are in college. When the person is in college, the person won't be able to take up certain jobs that'll provide money to him or her.Hence, the correct option is the opportunity cost is that the person will earn less money during the years that you are in college.
Learn more on about opportunity cost, click:
https://brainly.com/question/13036997
#SPJ1
equation for parabola if the point is (3,0)
Answer:
[tex]y=(x-3)^{2}[/tex]
Step-by-step explanation:
First, it should be noted that the parabola shown is just the parent parabola translated over 3 units to the right. To shift the parent parabola over to the right 3 units, we need to square x-3. So, the equation for the parabola shown is [tex]y=(x-3)^{2}[/tex].
If this answer helped you, please leave a thanks or a Brainliest!!!
Have a GREAT day!!!
2) Find a then the measures of angle K and J: (3 marks)
H
G
(20a +30)
5aº
(17a+ 48)
K
From the given triangle JKL, measure angle K is 65 degrees.
What are the four different types of triangles?The length of the sides distinguishes triangles of the scalene, isosceles, and equilateral kinds. If the lengths of the three sides are all different, the triangle is a scalene triangle. A triangle that has equal lengths on each of its three sides is said to be isosceles.
The measure of angle j in the triangle JKL is 30 degrees less than the measure of angle K, while the measure of angle L is 80 degrees. measure the angle K.
Suppose angle K = x, at which point angle J = x-30 degrees, and angle L = 80 degrees.
The total of a triangle's three angles is 180 degrees, or K+L+J = 180.
The angles of the triangle are
since x+80+x-30
= 180 + 2x
= 180-80+30
= 130 and
x= 130/2 = 65 degrees.
K = 65 degrees,
L = 80 degrees, and
J = 35 degrees
To learn more about triangles from given link
https://brainly.com/question/28144202
#SPJ1
Complete question -
In triangle JKL,the measure of angle j is 30 degrees less than the measure of angle K and measure angle L=80. find measure angle K.
*please answer fast*
2. [tex]\angle 1 \cong \angle 2[/tex]
3. [tex]\overline{AC} \cong \overline{AC}[/tex]
4. [tex]\triangle ABC \cong \triangle CDA[/tex]
Are attitudes toward digital books changing? Sample surveys show that more people are open to reading books digitally now than in the past. A recent survey asked a random sample of 2500 U.S. adults if they agreed or disagreed with the statement, “I prefer digital books to paper books.” In this survey, 1350 agreed. A local bookstore owner claims that only 50% of all U.S. adults would say “Agree” if asked the same question.
(a) What is the sample proportion of U.S. adults who agreed with the statement?
(b) If the Kindle employee’s claim is true, what is the probability that the proportion in a random sample of 2500 U.S. adults is at least as far above 0.50 as the results of this survey?
(c) Based on your answer in part (b), do you have reason to doubt the bookstore owner’s claim?
The probability that the proportion in a random sample is 0.99997.
What is Standard deviation?The term "standard deviation" (or "σ") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed.
Given:
For this case we have a random sample of 2500 people, this value represent n.
We know that in the sample selected the number of people who say that prefer shop online rather than in a store are 1575.
For this case we can calculate the sample proportion with this formula:
h(p) = x/n
= 1350/ 2500
= 0.54
Now, [tex]\mu_p =[/tex] 0.54
and, [tex]\sigma_p[/tex] = √0.54 (1- 0.54)/2500
= 0.00996
and, we want to calculate the following probability:
P(p>0.50)
= 1- P(p< 0.50)
= 1 - P(z < (0.5 - 0.54)/ 0.00996)
= 1 - P(z< -4.016)
= 1- 0.00003
= 0.99997
c) For this case since the probability is very high we can conclude that the manager is correct since is very improbable that the true proportion would be lower than 0.5.
Learn more about Standard deviation here:
https://brainly.com/question/23907081
#SPJ1
consider the following differential equation y'' - 8y αy = 0 for which value(s) of α does the characteristic equation have 2 distinct real solutions? 2 complex solutions? 1 repeated real solution?
The characteristic equation has 2 distinct real solutions if α > 16, 2 complex solutions if α < 16, and 1 repeated real solution if α = 16.
The characteristic equation of the differential equation y'' - 8y + αy = 0 is given by:
r^2 - 8r + α = 0
For 2 distinct real solutions, the discriminant of the characteristic equation must be positive, which leads to the condition:
(8)^2 - 4α > 0
64 - 4α > 0
-4α < -64
α > 16
For 2 complex solutions, the discriminant must be negative, which leads to the condition:
(8)^2 - 4α < 0
64 - 4α < 0
-4α > -64
α < 16
For 1 repeated real solution, the discriminant must be zero, which leads to the condition:
(8)^2 - 4α = 0
64 - 4α = 0
α = 16
For 2 distinct real solutions α > 16, For 2 complex solutions α < 16 and For 1 repeated real solution α = 16.
To learn more about equation here:
https://brainly.com/question/29657983
#SPJ4
an object hangs from a light string and moves in a horizontal circle of radius r. the string makes an angle θ with the vertical. the angular speed of the object is ω. what is tan θ?
The tangent's equation is tan = (r*) / (g), where g is the acceleration brought on by gravity.
Tan = (r*) / (g), where r is the circle's radius, is the object's angular speed, and g is the acceleration brought on by gravity, is the formula for the tangent to. The radius is the distance from the object's attachment point to the circle's center, whereas the angular speed refers to how quickly the object is spinning around the circle. The acceleration due to gravity, which represents the effect of gravity on the item, has a constant value of 9.8 m/s2. As a result, to determine the tangent of, one must determine the ratio of the acceleration due to gravity to the radius multiplied by the angular speed.
Learn more about equation here
https://brainly.com/question/29657992
#SPJ4
Can someone help with 17-20 please
When the figure is rotated around the line, a cylinder is created.
Find the volume of the solid?The perimeter of the 2-D figure is 20 units.The volume of the solid is 40π units.Two dimensional shapes created by the cross sections of the solid are circles and rectangles.When this figure is rotated around the line, a solid called a right circular cylinder is created.A right circular cylinder is a three-dimensional object that has two parallel circular bases connected by a curved surface.The perimeter of the 2-D figure is the sum of the lengths of the sides, which is 20 + 8 + 20 + 8 = 56.The volume of the solid is the area of the base times the height, which is π(5)² x 10 = 250π.Two two-dimensional shapes created by cross sections of the solid are circles and rectangles.A circle is created when the cross section is perpendicular to the axis of rotation.A rectangle is created when the cross section is parallel to the axis of rotation.The circles will have a radius of 5 and the rectangles will have length and width of 10 and 8, respectively.To learn more about right circular cone refer to:
https://brainly.com/question/21926193
#SPJ1