Answer:
(0,-2) (7,0)
Step-by-step explanation:
8.1 do you use a smart watch or fitness tracker? a pew internet poll asked 4272 u.s. adults about their use of smart watches and fitness trackers. a summary of the results reported that 897 adults regularly wear a smart watch or fitness tracker.7 a. identify the sample size and the count. b. calculate the sample proportion. c. explain the relationship between the population proportion and the sample proportion.
a) The Sample size is calculated to be 4,272 U.S. adults and count is 897. (b) Sample proportion is 0.21 or 21%. (c)The sample proportion is an estimate of the population proportion.
The sample size is 4,272 U.S. adults, and the count of those who regularly wear a smart watch or fitness tracker is 897.
To calculate the sample proportion, we divide the count of those who regularly wear a smart watch or fitness tracker by the sample size:
sample proportion = count / sample size
sample proportion = 897 / 4,272
sample proportion = 0.21 or 21%
Therefore, the sample proportion of U.S. adults who regularly wear a smart watch or fitness tracker is 21%.
The population proportion is the proportion of all U.S. adults who regularly wear a smart watch or fitness tracker, while the sample proportion is the proportion of U.S. adults in the sample who regularly wear a smart watch or fitness tracker.
The relationship between the two proportions is that the sample proportion is an estimate of the population proportion. The sample proportion provides a rough idea of the proportion of all U.S. adults who regularly wear a smart watch or fitness tracker, but it may not be exactly the same as the population proportion due to sampling error.
To get a more accurate estimate of the population proportion, we would need to take a larger and more representative sample or survey the entire population.
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a
0) Chelsea invests $4,734 in a savings
account with a fixed annual interest rate of
4.02% compounded 4 times per year.
What will the account balance be after 12
years?
A) $7,962.65 B) $8,625.82
C) $8,287.61 D) $7,650.44
Answer:
$7650.44
Step-by-step explanation:
Annual interest rate = 4.02%
but compound 4 times per year, means quarterly compound
quarterly interest rate = 4.02%/4 = 1.005%
Account balance = 4734 * (1.01005)^48 [compound 4 times a year for 12 years]
= 4734 * 1.616
= 7650.44
Answer:
D) $7,650.44
Step-by-step explanation:
Compound Interest Formula
\(\large \text{$ \sf A=P(1+\frac{r}{n})^{nt} $}\)
where:
A = final amountP = principal amountr = interest rate (in decimal form)n = number of times interest applied per time periodt = number of time periods elapsedGiven:
P = $4,734r = 4.02% = 0.0402n = 4 (quarterly)t = 12 yearsSubstituting the given values into the formula and solving for A:
\(\large \text{$ \sf \implies 4734\left(1+\frac{0.0402}{4}\right)^{4 \times 12} =7650.435473$}\)
give an o(n lg k)-time algorithm to merge k sorted lists into one sorted list, where n is the total number of elements in all the input lists. your solution must include:
The algorithm we will use to merge k sorted lists into one sorted list is called the "k-way merge algorithm."
Here are the detailed steps for the k-way merge algorithm:Create a min heap of size k and insert the first element of each input list into the heap.
Repeat the following steps until the heap is empty Extract the minimum element from the heap and add it to the output list and If the input list from which the minimum element was extracted is not empty, insert the next element from that list into the heap.
The time complexity of this algorithm is O(n log k), where n is the total number of elements in all the input lists, and k is the number of input lists.
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if p and n are positive integers and p > n, what is the remainder when p2 – n2 is divided by 15 ?
If p and n are positive integers and p > n. 0, 1, 5, 6, 9, and 11 are the remainders when p² - n² is divided by 15.
To find the remainder whilst (p² - n²) is split with the aid of 15, we are able to think of the expression p² - n² the usage of the distinction of squares method.
The distinction of squares formula states that a² - b² can be factored as (a + b)(a - b).
Applying this method to p² - n²;
p² - n² = (p + n)(p - n)
Now, we recognize that p and n are positive integers and p > n. This way that p + n and p - n are both advantageous integers.
To locate the remainder whilst (p^2 - n^2) is split through 15, we will take a look at the remainders of (p + n) and (p - n) when divided with the aid of 15.
Let's don't forget the viable remainders when dividing an integer by means of 15:
zero, 1, 2, 3, 4, five, 6, 7, eight, 9, 10, 11, 12, 13, 14
Since p + n and p - n are both high-quality integers, the feasible remainders when dividing them by way of 15 could be:
zero, 1, 2, three, 4, 5, 6, 7, eight, 9, 10, eleven, 12, thirteen, 14
Now, permits take into account the viable products of (p + n) and (p - n) while the remainder is multiplied:
0 * 0 = 0
1 * 14 = 14
2 * 13 = 26 (that's equal to eleven modulo 15)
3 * 12 = 36 (that's equal to six modulo 15)
4 * eleven = 44 (that's equivalent to fourteen modulo 15)
5 * 10 = 50 (which is equivalent to five modulo 15)
6 * 9 = 54 (that is equivalent to nine modulo 15)
7 * eight = 56 (that's equal to 11 modulo 15)
8 * 7 = 56 (that is equivalent to eleven modulo 15)
9 * 6 = 54 (that's equal to nine modulo 15)
10 * 5 = 50 (which is equivalent to 5 modulo 15)
11 * 4 = 44 (that's equivalent to fourteen modulo 15)
12 * 3 = 36 (that is equal to 6 modulo 15)
13 * 2 = 26 (that's equivalent to 11 modulo 15)
14 * 1 = 14
From the above merchandise, we will see that (p + n)(p - n) will have remainders of zero, 1, five, 6, 9, and eleven when divided via 15.
Therefore, the feasible remainders whilst () is split through 15 are 0, 1, 5, 6, nine, and 11.
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suppose that 36% of people own dogs. if you pick two people at random, what is the probability that they both own a dog? give your answer as a decimal (to at least 3 places) or fraction
Thus, the probability that two people picked at random both own a dog is 0.1296 or 1296/10000.
To solve this problem, we need to use the formula for calculating the probability of independent events: P(A and B) = P(A) x P(B).
In this case, let A be the event that the first person owns a dog and B be the event that the second person owns a dog.
We know that P(A) = 0.36, or 36% chance that the first person owns a dog. Since the events are independent, P(B) is also 0.36.
So, the probability of both events occurring (both people owning dogs) is:
P(A and B) = P(A) x P(B)
= 0.36 x 0.36
= 0.1296
This can also be expressed as a fraction:
P(A and B) = 36/100 x 36/100
= 1296/10000
Therefore, the probability that two people picked at random both own a dog is 0.1296 or 1296/10000.
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A ladybug starts at the center of a 12.0 in .-diameter turntable and crawls in a straight radial line to the edge. While this is happening, the turntable turns through a 45.0 ∘ angle.
Part A
Find the magnitude of the ladybug's displacement vector.
Part B
Find the direction of the ladybug's displacement vector.
The turntable turns through a 45.0 degree angle, the radial line also rotates by 45.0 degrees. Therefore, the direction of the ladybug's displacement vector is 45.0 degrees counterclockwise from the positive x-axis.
Part A:
The radius of the turntable is half of the diameter, which is 6.0 in. The ladybug crawls in a straight radial line to the edge, which means its displacement vector is equal to the radius of the turntable. Therefore, the magnitude of the ladybug's displacement vector is 6.0 in.
Part B:
The direction of the ladybug's displacement vector is the same as the direction of the radial line from the center of the turntable to the edge. This direction can be described by the angle between the positive x-axis and the radial line.
Since the turntable turns through a 45.0 degree angle, the radial line also rotates by 45.0 degrees. Therefore, the direction of the ladybug's displacement vector is 45.0 degrees counterclockwise from the positive x-axis.
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prime factorization of 90
a triangle's base and height are changing. (a) if the base is growing at a rate of 1 cm per second and the height is growing at a rate of 2 cm per second at what rate is the area changing the moment that the base is 4 cm and the height is 7 cm?
The rate of change of the area of the triangle is 7cm/sec when the base is 4cm and height is 7cm.
What is the rate of change?The rate at which a variable alters over a predetermined amount of time. It is frequently used when discussing momentum and is typically expressed as a ratio of one variable's change to another's corresponding change. This ratio is graphically represented by a line's slope.We know that,
The Base is growing at the rate of 1 cm per sec.
Height is growing at the rate of 2 cm per sec.
Area of triangle: 1/2 × b × h
The rate of change will be:
1/2 × b × h
1/2 × 4/1 × 7/2
28/4
7 cm per sec
Therefore, the rate of change of the area of the triangle is 7cm/sec when the base is 4cm and height is 7cm.
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The frequency table shows the results of a survey about favorite exhibits.
The relative frequency of randomly selected students whose favorite exhibit was either butterflies or trains is 36% (third option)
What is the relative frequency?Relative frequency is the ratio of the frequency of a class to the total frequency.
Relative frequency of randomly selected students whose favorite exhibit was either butterflies or trains = (number of students that chose butterflies / total frequency) + (number of students that chose trains / total frequency)
Total frequency = 12 + 25 + 17 + 6 = 50
= (12/50) + (6/50) = 18/50
(18/50) x 100 = 36%
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find the total of the areas under the standard normal curve to the left of z1=−1.645 and to the right of z2=1.645. round your answer to four decimal places, if necessary.
the total area under the standard normal curve to the left of z1 = -1.645 and to the right of z2 = 1.645 is approximately 0.
To find the total area under the standard normal curve to the left of z1 = -1.645 and to the right of z2 = 1.645, we can use the properties of the standard normal distribution.
The area to the left of z1 represents the cumulative probability from negative infinity up to z1, and the area to the right of z2 represents the cumulative probability from z2 up to positive infinity.
Using a standard normal distribution table or a calculator, we can find the cumulative probabilities associated with these z-values.
The cumulative probability to the left of z1 = -1.645 is approximately 0.0500 (rounded to four decimal places).
The cumulative probability to the right of z2 = 1.645 is also approximately 0.0500 (rounded to four decimal places).
To find the total area between z1 and z2, we subtract the cumulative probability to the right of z2 from the cumulative probability to the left of z1:
Total area = 0.0500 - 0.0500 = 0
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A tennis racket with a price of $180 is subject to a sales tax of 7%. What is the total
price of the racket?
$192.60
$187
The total price of the racket is $192.60 (first option).
What is the total price?A tax is a compulsory amount of money that is levied by the government or an agency of the government on goods and services. A sales tax is levied on the sales of goods and services.
The total price of the racket would include the amount of tax that would be paid.
Total price = (1 + tax/100) x initial price
Total price = (1 + 7%/100) x $180
Total price = (1 + 0.07) x $180
Total price = (1,07 x $180)
Total price = $192.60
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Angel is making dumplings. If he uses cup of dough for each dumpling, how many cups of dough does Angel need to make 7 dumplings?
Answer:
7
Step-by-step explanation:
If the mpc increases in value, what will happen to the slope of the consumption function?
If the mpc increases in value, the consumption function will become steeper.
What is MPC ?
MPC is an advanced method of process control that is used to control a process while satisfying a set of constraints. In economics, the marginal propensity to consume is a metric that quantifies induced consumption, the concept that the increase in personal consumer spending occurs with an increase in disposable income. The proportion of disposable income which individuals spend on consumption is known as propensity to consume. MPC is the proportion of additional income that an individual consumes.
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consider the figure above. which of the following correctly identifies each curve?
The figure illustrates four different growth patterns: exponential growth (Curve A), logarithmic decay (Curve B), linear growth (Curve C), and sigmoidal growth (Curve D).
Curve A represents an exponential growth pattern. It starts with a relatively slow increase but gradually accelerates over time. This type of growth is commonly observed in natural phenomena like population growth or the spread of infectious diseases.
Curve B depicts a logarithmic decay pattern. It begins with a steep decline but levels off over time. Logarithmic decay is often seen when a process initially experiences rapid changes but eventually approaches a stable state or limiting factor.
Curve C displays a linear growth trend. It shows a constant and consistent increase over time. Linear growth is characterized by a steady rate of change and is commonly observed in situations where there is a constant input or output.
Curve D represents a sigmoidal growth pattern. It starts with a slow initial growth, then experiences rapid expansion, and finally levels off. Sigmoidal growth is prevalent in various fields, such as biology, economics, and technology, where a system initially has limited resources, undergoes rapid development, and eventually reaches a saturation point.
The figure illustrates four different growth patterns: exponential growth (Curve A), logarithmic decay (Curve B), linear growth (Curve C), and sigmoidal growth (Curve D).
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-3(5x-10)= distributive property
Answer:
Step-by-step explanation:
-150
Answer: -15x + 30
Step-by-step explanation:
-3(5x) = -15x (positive x negative = negative)
-3(-10) = 30 (negative x (negative = positive)
(same symbols = positive)
(Different symbols = negative)
geomotry multiple choice
Answer:
b
Step-by-step explanation:
find the HCF of the following numbers by prime factorization method 324 & 432
Answer:
108
Step-by-step explanation:
324 = 2 * 2 * 3 * 3 * 3 * 3
432 = 2 * 2 * 2 * 2 * 3 * 3 * 3
The HCF is 2 * 2 * 3 * 3 * 3 = 108
Which value for x makes the sentence true?
1/40 + X = 1/8.
А. 3/20
B. 1/10
C. 1/24
D. 1/32
Answer:
B
Step-by-step explanation:
\( \frac{1}{40} + x = \frac{1}{8} \)
\(40( \frac{1}{40}) + (40)x = 40( \frac{1}{8} )\)
\(1 + 40x = 5 \times 1\)
\(1 + 40x = 5\)
\(40x = 5 - 1\)
\(40x = 4\)
\( \frac{40x}{40} = \frac{4}{40} \)
\(x = \frac{1}{10} \)
Answer:
1/10
Step-by-step explanation:
Trees and Triangles It's a beautiful spring day and you are relaxing by a large tree. The sun rose at 5:40 this morning, and it's not expected to set again until 6:20 tonight. Although there are a few clouds in the sky, it's a bright and sunny day, and you begin to notice your shadow. While you are only 5 feet and six inches tall, your shadow is 8 feet long. You look over at the tree's shadow, and it's even longer!! After walking the length of the tree's shadow, you estimate it to be about 48 feet long. 1. You fall asleep under the shade of the tree. When you wake up, you notice that your shadow is now half as long as it was before, but is in the opposite direction! How long were you sleeping?
You fall asleep under the shade of the tree. When you wake up, you notice that your shadow is now half as long as it was before, but is in the opposite direction. So you have slept around 6 hours and 20 minutes
Since the length of the shadow is proportional to the height of the object producing the shadow, we can solve this problem with comparable triangles.
Let S be the length of your shadow before sleeping, and T be the length of the tree's shadow. Also, make H your height.
Then there are two triangles that are similar:
your shadow / distance = H / S
The shadow of a tree /distance = H/ T
Using the facts provided, we have:
H = 5'6"
S = 8
T = 48
H /S = 5'6"/8
= 5.5 feet / 8
= 0.6875
H /T = 5'6"/48
= 5.5 feet / 48
= 0.1146
When you wake up, your shadow is half the length it was before, resulting in:
0.6875/2 = 0.34375
Since the two triangles are still similar, we can use this knowledge to calculate S:
H / (S/2) = 5.5/ (S/2)
5.5S = 2H
S = 2H/5.5
S = 2(0.6875)/5.5
S = 0.25
So, your shadow is 0.25 feet long, or 3 inches after sleeping. Because your shadow was half as long as it had been before, you must have slept for half the time the sun was up:
(18:20 - 5:40)/2 = 6 hours and 20 minutes
You slept for 6 hours and 20 minutes as a result.
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Find the volume of a right circular cone that has a height of 14.3 ft and a base with a diameter of 17.2 ft. Round your answer to the nearest tenth of a cubic foot.
Answer:
V = 3322.6 ft³
Step-by-step explanation:
V(rt cone) = \(\frac{\pi r^2h}{3}\)
V = [π(17.2/2)²(14.3)] ÷ 3
V = π(8.6)²(14.3)
V = 73.96(14.3)π
V = 3322.6
Tim bought $200 TV Sets and $50 portable speakers to give to his students for Christmas. She bought 30 devices in all and spent $3000. How many TV's and Speakers did she buy? Show all work.
Answer:
12
200+50=250
3,000/250=12
which ordered pair represents a point on the line y=2x+1
Answer:
(0,1) , (1,3) , (2,5) , (3,7) , (4,9) , (5,11) are examples of points on the line
y = 2x + 1.
TRUE/FALSE. as one does more and more separate hypothesis tests, the risk of a type i error accumulates and is called the experiment-wise alpha level.
TRUE. As one performs multiple separate hypothesis tests, the risk of committing a Type I error (rejecting a true null hypothesis) accumulates.
This overall risk is referred to as the experiment-wise alpha level or family-wise error rate (FWER). It represents the probability of making at least one Type I error among all the conducted tests.
When multiple hypothesis tests are performed simultaneously or sequentially, the individual alpha levels (typically set at 0.05) for each test may no longer be appropriate. This is because if we conduct, for example, 20 separate tests with an alpha level of 0.05 for each test, the cumulative chance of committing at least one Type I error can be much higher than the desired 5%.
To control the experiment-wise error rate, various multiple comparison procedures and adjustments can be employed, such as the Bonferroni correction or the Holm-Bonferroni method. These methods aim to maintain a desired level of significance for the entire set of tests, reducing the risk of accumulating Type I errors.
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If M ={1,2,3,6} and N={1,2,4,8}, find: MUN compliment and M intersection N
Step-by-step explanation:
MUN={1,2,3,4,6,8}
M intersection N={1,2}
hope it helps.
Step-by-step explanation:
M intersection N = { 1 , 2 }
hope it is helpful to you
l = [?] ft
9 ft
4ft
PLEASE HELP MEMEMEMEME
A recipe requieres 1/2 cup of flour for every batch of cookies. How many full batches of cookies can be made with 5 1/2 cups of flour?
(Hint: How many 1/2's are in 5 1/2?)
Ivan is taking a 179 mile trip by car.If he drives for two hours with an average speed of 65 miles per hour, how many miles will he still need to drive to complete his trip?
Answer:
you should take notes
Step-by-step explanation:
why you should know this your teacher probally already taught you this already you should go back and take notes = )
a farmer plans to enclose a rectangular pasture adjacent to a river (see figure). the pasture must contain 5,000 square meters in order to provide enough grass for the herd. no fencing is needed along the river. what dimensions will require the least amount of fencing?
50 m is dimensions will require the least amount of fencing .
What is rectangle?
A rectangle is a sort of quadrilateral with parallel sides that are equal to one another and four vertices that are all 90 degrees apart. It is also known as an equiangular quadrilateral for this reason.
Because the opposite sides of a rectangle are equal and parallel, it can also be referred to as a parallelogram.
Let x = length of the side parallel to the river
y = length of each of the other two sides
Then xy = 5,000, so y = 5,000/x
Minimize: L = length of the fence
L = x + 2y
= x + 10,000/x, where x > 0
L' = 1 - 10,000/x2 = (x2 - 10,000)/x2
L' = 0 when x = 100 or -100
Since x can't be negative, x must be 100.
When 0 < x < 100, L' < 0. So, L is decreasing.
When x > 100, L' > 0. So L is increasing.
Therefore, L has a relative and absolute minimum when x = 100 m
y = 5,000/x = 50 m
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a rotating sprinkler can reach up to 14 feet through a 300 degree angle. find the total area covered by the sprinkler in one sweep. round to the nearest tenth. What is the area of the lawn, to the nearest square foot, that receives water from this sprinkler?
In one sweep, the area covered by the sprinkler is 77.19 sq ft (approx). The area of the lawn, to the nearest square foot, that receives water from this sprinkler is 616 sq ft (approx).
We know that a rotating sprinkler can reach up to 14 feet through a 300-degree angle. Area covered by the sprinkler in one sweep = area of the sector whose radius = 14 feet and angle = 300°Area of sector = (θ / 360) × πr²Where θ = 300°, r = 14 ftArea of sector = (300/360)× π(14)²= 77.19 sq ft (approx) Therefore, the area covered by the sprinkler in one sweep is 77.19 sq ft (approx).
We need to find the total area of the lawn that receives water from this sprinkler. The sprinkler rotates 360 degrees, so it will cover a full circle whose radius is 14 feet. Area of a circle = πr²= π(14)²= 615.752 sq ft (approx) Therefore, the area of the lawn, to the nearest square foot, that receives water from this sprinkler is 616 sq ft (approx).
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Five sisters bought a present for their grandfather that cost each sister $10.80. They received a 10% discount. How much was the original price of the gift?
Answer:
$540
Step-by-step explanation:
Multiply 10.80 by the 5 sisters then divide your answer by 10%