The different percentages of the distance is 100%, 25% & 125%.
How to find the table to show different percentage of the distance?The Latin word "per centum," which means "by the hundred," served as the basis for the English word "percentage." Percentages are fractions with the denominator 100. In other words, it is the relationship between a part and a whole in which the value of the whole is always assumed to be 100.
A percentage is a fraction or ratio in which the whole value is always 100. For instance, Sam would have received 30 out of a possible 100 points if he had received 30% on his math test. It is expressed as 30/100 in fractional form and 30:100 in ratio form.
48 = 100% of 48
12 = 25% of 48
60 = 125% of 48
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Given
3x²+x-4, what are the domain and range?
X-1
OD: (XER |x-1),R: {ye Rly + 1}
E
#
OD: {xe R x + 1},R: y = Rly + -1}
E
OD: (x = R X-1},R: {ye Rly + -7}
#
OD: (x ER | X + 1},R: {ye Rly + 7}
The domain and range of the rational function in this problem are given as follows:
Domain: all real values except x = 1.Range: all real values except y = 7.How to obtain the domain and the range of a function?The domain of a function is the set that contains all the input values that can be assumed by the function.
The function in this problem is a fraction, meaning that the denominator must assume values different of zero, hence the value outside the domain is:
x - 1 = 0 -> x = 1.
The range of a function is the set that contains all the output values that can be assumed by the function.
The function in this problem can be simplified by x - 1, hence at x = 1 it would assume a value of y = 7. However, for the range, we suppose that the function cannot be simplified, hence it is given by all real values except y = 7.
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1/8 times y = 4 what is y
Answer: 32
Step-By-Step Explanation: 1/8 times 32 = 4
I multiplied 8 by 4 to get 32 then checked my answer by multiplying 1/8 and 32.
HELP PLS!!! WILL MARK THE MOST BRAINLIEST
there ae 46 legs in a zoo exihibit. every animal has either 2 or 4 legs. the expression 2m+4n is the total number of legs for m 2 legged animals and n 4 legged animals in the exihibit
a. list possible values for m and n so that the total number of legs is 46
b. The number of 2 legged animas is 2 more than the number of 4 legged animals. how many of each are in the exhibit?
c. The number of legs in the exhibit increases by 4. what might account for this increase?
Answer:
Step-by-step explanation:
a. Possible values for m and n to achieve a total number of 46 legs are: m = 23 and n = 11; m = 22 and n = 12; m = 21 and n = 13; m = 20 and n = 14; m = 19 and n = 15; m = 18 and n = 16.
b. If the number of 2 legged animals is 2 more than the number of 4 legged animals, there must be 24 2 legged animals and 22 4 legged animals in the exhibit (24 + 22 = 46).
c. The increase in the number of legs in the exhibit might be due to the addition of a new animal to the exhibit. If the new animal has 4 legs, the total number of legs in the exhibit will increase by 4.
Answer:
a) Possible values of m and n:
m = 23, n = 0m = 21, n = 1m = 19, n = 2m = 17, n = 3m = 15, n = 4m = 13, n = 5m = 11, n = 6m = 9, n = 7m = 7, n = 8m = 5, n = 9m = 3, n = 10m = 1, n = 11b) 9 two-legged animals and 7 four-legged animals.
c) Either 1 four-legged animal or 2 two-legged animals have been added to the exhibit.
Step-by-step explanation:
Given expression:
2m + 4n = 46
where:
m = 2 legged animalsn = 4 legged animalsPart aCalculate the greatest number of four-legged animals by dividing the total number of animals by 4:
[tex]\implies 46 \div 4 = 11.5[/tex]
Therefore, the greatest number of four-legged animals is 11.
When there are no four-legged animals, n = 0.
Substitute n = 0 into the given equation:
[tex]\begin{aligned}\implies 2m+4(0)&=46\\2m&=46\\ m&=23\end{aligned}[/tex]
Therefore, there are 23 two-legged animals when there are no four-legged animals.
Each time the number of four-legged animals increases by 1, the number of two-legged animals decreases by 2.
Therefore, the possible values for m and n so that the total number of legs is 46 are:
m = 23, n = 0m = 21, n = 1m = 19, n = 2m = 17, n = 3m = 15, n = 4m = 13, n = 5m = 11, n = 6m = 9, n = 7m = 7, n = 8m = 5, n = 9m = 3, n = 10m = 1, n = 11Part bIf the number of two-legged animals is 2 more than the number of four-legged animals then:
m = 9, n = 7Therefore, there are 9 two-legged animals and 7 four-legged animals.
Part cIf the number of legs in the exhibit increases by 4, then either:
1 four-legged animal has been added to the exhibit, or2 two-legged animals have been added to the exhibit.4 if the mixing ratio of a sample of air is 2 grams/kilogram, and the temperature of the sample is 25 degrees celsius, yielding a saturation mixing ratio of 20 grams/kilogram, what is the relative humidity of the sample?
Because the temperature is greater, the relative humidity of the atmosphere is higher.
Relative humidity: What is it?Water vapor is also measured by relative humidity (RH), which is stated as a percentage but RELATIVE to the air's temperature. In plenty of other terms, it is a comparison between the quantity of water vapor that is really present in the air and the maximum amount water vapor that is possible for the air at the current temperature.
How can relative humidity be determined from temperature?By deducting the temperature just on wet-bulb thermometer from of the temperature just on dry-bulb thermometers and utilizing a relative humidity chart, one may determine the relative humidity.
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Each week, Alfonso earns $85 for every shift he works at the theater and $15 for every dog-walking job. He uses the expression 85x 15y to keep track of his earnings. Part A: Identify the coefficients and variables in the expression. (3 points) Part B: How many terms are in the expression, what are they, and how do you know
Part A:Coefficients in are 85 and 15.
X represents theatrical shifts, Y represents dog-walking gigs.
Part B: Two phrases, the first of which indicates the amount of money he makes from his work in the theater and the second, from dog-walking. A sum or a deduct sign is used to demarcate each phrase.
Part A: The information we don't know is contained in an expression's variable. In this instance, we don't know how many dog-walking jobs he has in addition to his theater duties. We have 2 variables—x and y—because of this. The variable is multiplied by the coefficient, which is a number. Since there are two variables in this situation, there are two coefficients: 85 and 15.
Part B: A sum or a subtract sign is used to denote the separation of each term in an equation. The terms are the numbers and variables that occur before and after the sum sign because there is only one sum in this situation. 85x and 15y are involved. He initially discloses how much money he makes for each shift at his total annual salary at the theater is determined by multiplying his hourly wage by the number of shifts he works. The second one is the sum of the money he makes from each dog-walking work multiplied by the number of jobs he completes; this is the total amount he makes from the dog-walking jobs.
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I need help with this equation:
A line passes through the points (2,-1) and (4,-1).
I already know the slope is 0, what is the equation of the line? (In slope-intercept form)
The line which passes through the points (2,-1) and (4,-1) has the slope-intercept equation as y = -1.
What is the slope-intercept form?
The line with m as the slope, m and c as the y-intercept is the graph of the linear equation y = mx + c. The values of m and c are real integers in the slope-intercept form of the linear equation.
The line passes through point (x1,y1) = (2,-1) and (x2,y2) = (4,-1)
The formula to find slope is -
m = (y2-y1)/(x2-x1)
m = (-1+1)/(4-2)
m = 0/2
m = 0
Now use the slope and point (2,-1) to find the y-intercept.
y = mx + b
-1 = 0(2) + b
-1 = 0 + b
b = -1
Write the equation in slope-intercept form as -
y = mx + b
y = 0x + (-1)
y = -1
Therefore, the equation is obtained as y = -1.
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What is the equation of the line that passes through the point (1,-3) and has a slope of -3
Answer:
Step-by-step explanation:
The equation of line passing from point (x1,y1) and having slope m is
y- y1 =m(x- x1)
m=-3, x1=1, y1=-3
y-(-3) = -3(x-1)
y+3=-3(x-1)
y+3=-3x+3
y=-3x
3x+y=0
Answer:
y + 3x = 0
Step-by-step explanation:
The formula for equation of the line is :
y - y1 = m ( x - x1 )
NB: The m is the slope, then use substitution, solve and equate everything to 0
rebecca puts her backpack on a fan cart and turns the fan on. she then measures the speed each second afterward. at 10 seconds the cart has a speed of 20 cm per second. how fast will the cart be moving at 12 seconds?
At 12 seconds, the cart will be moving at 24 cm per second.Rebecca is using a fan cart and measuring the rate of the cart at different times.
Rebecca is using a fan cart and measuring the rate of the cart at different times. At 10 seconds, the cart has a speed of 20 cm per second. To calculate the speed at 12 seconds, you can use the formula rate x time = distance. The rate is the speed of the cart at 10 seconds, which is 20 cm per second. The time is the difference between 10 seconds and 12 seconds, which is 2 seconds. Thus, the equation becomes 20 cm/s x 2s = 40 cm. Therefore, the speed at 12 seconds is 24 cm per second.
At 12 seconds, the cart will be moving at 24 cm per second.
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veach half of this figure is composed of 3 red triangles, 5 blue triangles and 8 white triangles. when the upper half is folded down over the centerline, 2 pairs of red triangles coincide, as do 3 pairs of blue triangles. there are 2 red-white pairs. how many white pairs coincide
The correct answer is 5 white triangles coincide.
3 red, 5 blue, and 8 white triangles are present on each side. The 2 pairs of red triangles are also utilized, leaving 1 red triangle, 5 blue triangles, and 8 white triangles on each half.
Additionally, there are 3 pairs of blue triangles that are used up, leaving 1 red triangle, 2 blue triangles, and 8 white triangles on each half. Additionally, we offer 2 red-white pairs. Since there is only 1 on each side, it is evident that we cannot utilize 2 red triangles on one side.
As a result, we must use 1 red and 1 white triangle per side, leaving 2 blue and 7 white triangles on each. The remaining blue triangles must be coupled with white triangles in order to create 4 blue-white pairings, one for each of the remaining blue triangles.
Blue triangles cannot be matched with other blue triangles because it would result in more than 3 worth of blue pairs. This leaves 5 white triangles per side, which must be coupled with each other to create $5 white-white pairings.
Therefore, The correct answer is 5 white triangles coincide.
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Which best describes the range of the function fx 2 3 x?
On solving the provided question, we can say that the range of the function f(x) = 2(3)x is best described by y > 0.
What is range?The variable's range is obtained by finding its largest observed value (maximum) and subtracting its smallest observed value (minimum). Variational bounds or possible range: various steel prices; various styles; The extent or magnitude of a procedure or action: insight. the maximum or expected range of a weapon's projectile. The range of a list or set is the number between the minimum and maximum. Prior to identifying the region, align all the numbers. Remove (remove) the lowest number from the highest number next. The list's range is provided in the solution.
The range of the function f(x) = 2(3)x is best described by y > 0.
Especially when the constant is e, a function whose value is a constant increased to the power of the argument.
An exponential function is a function with the form, where b is referred to as the base and x can be any real number, if b is any number such that and.
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Which number line represents the solution set for the inequality 2x 6 ≥ 6 x 2 8?
On solving the provided question, we can say that the variable x while retaining the inequality [tex]- 2 \geq 4x = > -1/2 \geq x[/tex]
What is inequality?An inequality in mathematics is a relationship between two expressions or values that is not equal. Thus, imbalance leads to inequality. An inequality creates the link between two values that are not equal in mathematics. Egality is distinct from inequality. When two values are not equal, most commonly use the not equal sign (). Different inequalities are used to contrast values, no matter how little or large. Many simple inequalities may be resolved by modifying the two sides until the variables are all that remain. But a number of things contribute to inequality: Negative values on both sides are divided or added. Trade off the left and right.
Inequality is 2x - 6 ≥ 6(x - 2) + 8
the variable x while retaining the inequality
[tex]2x - 6 \geq 6x - 12 + 8\\-6 + 12 - 8 \geq 6x - 2x\\- 2 \geq 4x\\-1/2 ≥ x[/tex]
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give your answer to the nearest interger
please help me
Answer:
33 mm
Step-by-step explanation:
Given a triangle with sides 48 mm and 55 mm, and angles x and w such that cos(x) = 4/5 and cos(w) = 1/2, you want the length of the third side (r) opposite angle x.
Law of cosinesFor sides a, b, c and angle C opposite side c, the Law of Cosines gives the relation ...
c² = a² +b² -2ab·cos(C)
ApplicationFilling in the given values, we have ...
r² = 48² +55² -2·48·55·(4/5) = 1105
r = √1105 ≈ 33 . . . . millimeters
The length r is about 33 mm.
__
Additional comment
Side r is irrational, so the triangle cannot have exactly the measures shown. Using other measures as true, the value of cos(w) is about 0.4994, not 1/2.
Taking cos(w) as true, side r is found using the law of cosines as 33.43717. Taking cos(x) as true, side r is found using the law of cosines as 32.24154. Taking the angle measures and 48 mm to be true, side r is found using the law of sines as 33.25538. All round to 33 mm.
The attachment shows the solution using cos(w)=1/2, or w=60°.
Let $a,$ $b,$ $c$ be positive real numbers. Find the minimum value of \[\frac{(a b)(a c)(b c)}{abc}.\]
The minimum value of the expression is [tex]$\sqrt{\frac{abc(a+b+c)^2}{6}}$[/tex], with a, b, and c be positive real numbers.
What is the positive real number?
In mathematics, the set of positive real numbers is the subset of those real numbers that are greater than zero. The non-negative real numbers, also include zero.
We can simplify the expression as follows:
a^2 b^2 c = (ab)^2 c.
Now, we can use the AM-GM inequality to find the minimum value of the expression:
[tex][(ab)^2 c \ge \left(\frac{(ab)^2 + c}{2}\right)^2 = \left(\frac{(ab + c)^2 - 2abc}{4}\right)^2.][/tex]
As the minimum value is achieved when equality holds, we can set the equation to the original expression and simplify it.
[tex][(ab)^2 c \ge \left(\frac{(ab)^2 + c}{2}\right)^2 = \left(\frac{(ab + c)^2 - 2abc}{4}\right)^2.][/tex]
[tex]$a^2b^2c = \frac{(a^2b^2+ 2ab^2c+c^2b^2) - 2abc}{4}$[/tex]
[tex]$4a^2b^2c = (a^2b^2+ 2ab^2c+c^2b^2) - 2abc$[/tex]
4abc = (ab + c)(ab + c) - 2abc
4abc = (ab + c)^2 - 2abc
6abc = (ab + c)^2
so the minimum value is: [tex]$(\frac {(ab+c)^2}{6})^{\frac{1}{2}}$[/tex]
[tex]$\sqrt{\frac{abc(a+b+c)^2}{6}}$[/tex]
Hence, the minimum value of the expression is [tex]$\sqrt{\frac{abc(a+b+c)^2}{6}}$[/tex], with a, b, and c be positive real numbers.
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Find the least distance between AB and CD
Hope it helps.
If you have any query, feel free to ask.
Question 8 Question 8 of 10 v AREA The area of the rectangle in the figure is 32xy³ square units. Find the width of the rectangle. Write any variables in alphabetical order
The width of the rectangle is given as Area/length = 32xy³/l units.
What is a rectangle ?A quadrilateral with four right angles is a rectangle. It may alternatively be described as a parallelogram with a right angle or an equiangular quadrilateral, where equiangular denotes that all of its angles are equal. A square is a rectangle with four equally long sides.
Rectangles have the following basic characteristics:
They are quadrilaterals.The opposing sides are level and parallel to one another.90 degrees is the angle of each interior.360 degrees is the total of all interior angles.The diagonals cut each other in half.The length of both diagonals is the same.The area of the rectangle is 32xy³
The length of the rectangle is l units
So, the width of the rectangle is given as Area/length = 32xy³/l units.
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In the question, diagram is not given, so that a rough diagram is given for reference.
a bag contains:5 red marbles 6 blue marbles 3 green marbles 4 black marbles2 yellow marble a marble will be drawn from the bag and replaced 180 times. what is a reasonable prediction for the number of times a red or yellow marble will be drawn?
A reasonable prediction for the number of times a Red or Yellow Marble Draws = (7/20) x 180 = 126.
The total number of marbles in the bag is 20 (5 red, 6 blue, 3 green, 4 black, and 2 yellow). Therefore, the probability of drawing a red or yellow marble is 7/20. Applying this probability to the 180 times a marble is drawn and replaced, we can calculate that the number of times a red or yellow marble is likely to be drawn is 126 (7/20 x 180). This can be expressed as a formula as follows: Red or Yellow Marble Draws = (Number of Red and Yellow Marbles / Total Number of Marbles) x Number of Draws. In this case, Red or Yellow Marble Draws = (7/20) x 180 = 126.
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Martina rents a room in her home to guests. She charges a $25 flat fee per night for one person. Additional guests are welcome to stay, but she charges $10 per person. She expects guests to check out by 10 a.m. and charges an extra $5 per hour for late checkouts. Select the linear equation that correctly represents how much Martina collects for one night of stay in her home.
The linear equation that correctly represents how much Martina collects for one night of stay in her homey is 25 + 10x - 5z
The linear equation to represent how much Martina collects for one night of stay in her home is:
y = 25 + 10x - 5z
where:
y is the total amount collected in dollars
x is the number of additional guests (besides the first one)
z is the number of hours the guests check out late
This equation represents the flat fee of $25 per night for the first guest, the additional fee of $10 per person per night for additional guests, and the extra fee of $5 per hour for late checkouts.
Therefore, The linear equation that correctly represents how much Martina collects for one night of stay in her homey is 25 + 10x - 5z
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Please help asap!! I need help, how do you solve this??
Answer:
FIRST ONE IS 7
Step-by-step explanation:
SECOUND ONE IS 12THIRD ONME IS 2
in response to the increasing weight of airline passengers, the federal aviation administration (faa) told airlines to assume that passengers average 190 pounds in the summer, including clothes and carry-on baggage. but passengers vary, and the faa did not specify a standard deviation. a reasonable standard deviation is 35 pounds. a commuter plane carries 30 passengers. find the probability that the total weight of 30 randomly selected passengers exceeds 6000 pounds. (hint: to calculate this probability, restate the problem in terms of the mean weight.)
The probability of 30 random people having weight more than 6000 pounds is 0.3134 or 31.34%.
To find the probability that the total weight of 30 randomly selected passengers exceeds 6000 pounds, we can use the Central Limit Theorem (CLT) which states that the sum of a large number of independent and identically distributed random variables will tend to be normally distributed, regardless of the underlying distribution of the individual variables.
Since we know the average weight of a passenger (190 pounds) and a reasonable standard deviation (35 pounds), we can use this information to calculate the mean and standard deviation of the total weight of 30 passengers.
The mean weight of 30 passengers is:
30*190 = 5700 pounds
The standard deviation of the weight of 30 passengers is:
sqrt(30)*35 = 59.8076211353316
Now we can use the standard normal distribution table, or z-score formula to find the probability that the total weight of 30 randomly selected passengers exceeds 6000 pounds.
z = (6000-5700)/59.8076211353316
z = 0.50251572
The probability of a z-score being greater than 0.50251572 is 0.3134, this means that there is a 31.34% chance that the total weight of 30 randomly selected passengers will exceed 6000 pounds.
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a group of 24 people equally shared 14 pounds of ground beef. how many pounds of ground beef did each person get?
On solving the provide question, we can say that by unitary method each person get = 24/14 = 1.7142857143 pounds of beef
What is unitary method ?The unit technique is an approach to problem-solving that involves first determining the value of a single unit, then multiplying that value to determine the required value. The unit method, to put it simply, is used to extract a single unit value from a supplied multiple. For instance, 40 pens would cost 400 rupees, or the price of one pen. The process for doing this may be standardized. a single country. anything that has an identity element. (mathematics, algebra) (Linear algebra, mathematical analysis, mathematics of matrices or operators) Its adjoint and reciprocal are equivalent.
here,
a group of = 24 people
equally shared = 14 pounds of ground beef.
each person get = 24/14 = 1.7142857143 pounds of beef
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A 6-sided die is rolled. Find P(3 or 5).
A.1 / 36
B.1 / 3
C.2
D.1 / 6
When a 6-sided die is rolled, P(3 or 5) is equal to B. 1/3.
A 6-sided die has six possible outcomes: 1, 2, 3, 4, 5, and 6. To find P(3 or 5) or the probability of rolling a 3 or a 5, we need to add the probabilities of rolling each of those numbers separately and then subtract the probability of rolling both numbers (3 and 5) at the same time to avoid overcounting.
The probability of rolling a specific number on a fair die is 1/6, since there are 6 possible outcomes.
So, P(rolling a 3) = 1/6 and P(rolling a 5) = 1/6
P(3 or 5) = P(rolling a 3) + P(rolling a 5) - P(rolling 3 and 5) = 1/6 + 1/6 - 0 (since rolling 3 and 5 is not possible)
= 2/6 = 1/3
Therefore, the probability of rolling 3 or 5 on a fair 6 sided die is 1/3.
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What is the value of x?
x = ____
Enter the number only!
The value of 'x' for the given co exterior angles for the parallel lines PQ ans SR is found as: x = 30.
Explain the term co exterior angles?Co-exterior angles are external angles that are on the same transverse side. Co-exterior angles add up to 180 degrees.The two angles which it are on the same side of such transversal are known as co-interior angles as well as consecutive interior angles. The inside angles total 180 degrees and are known as co-interior angles. It indicates that two internal angles that reside on the identical side of the transversal have a sum that is additional.For the stated question:
(x + 12) + (3x + 48) = 180 (co exterior angles are supplementary)
4x + 60 = 180
4x = 180 - 60
4x = 120
x = 30
Thus, the value of 'x' for the given co exterior angles for the parallel lines PQ ans SR is found as: x = 30.
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What is the value of |−13| − |21|
Answer:
- 8
Step-by-step explanation:
the absolute value function always gives a positive value, that is
| - a | = | a | = a
then
| - 13 | - | 21 |
= | 13 | - | 21 |
= 13 - 21
= - 8
mr. earl e. bird leaves his house for work at exactly 8:00 a.m. every morning. when he averages 40 miles per hour, he arrives at his workplace three minutes late. when he averages 60 miles per hour, he arrives three minutes early. at what average speed, in miles per hour, should mr. bird drive to arrive at his workplace precisely on time?
if 40 makes him 30 mins late and 60 makes him 30 mins early then it only would make since that in between both 40 and 60 is 50 and that would make him go on time
mr. earl e. bird leaves his house for work at exactly 8:00 a.m. every morning
when he averages 40 miles per hour, he arrives at his workplace thirty minutes late.
when he averages 60 miles per hour, he arrives thirty minutes early.
at what average speed, in miles per hour, should mr. bird drive to arrive at his workplace precisely on time?
if 40 makes him 30 mins late and 60 makes him 30 mins early then it only would make since that in between both 40 and 60 is 50 and that would make him go on time
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is there an association between the state and the amount of median debt for graduates?
There is no association between the state and the amount of median debt for graduates.
How to find the association between the state and median debt ?To find the association between states and the median debt, you need to find the percentage of the graduates in the state that either have a median debt of less than $ 9, 000 or at least $ 9, 000.
The percentage of California University graduates with median debt less than $ 9, 000 is:
= 130 / 575
= 23 %
The percentage of New York University graduates with median debt less than $ 9, 000 is:
= 72 / 343
= 21 %
The percentage of California University graduates with median debt at least $ 9, 000 is:
= 445 / 575
= 77 %
The percentage of New York University graduates with median debt at least $ 9, 000 is:
= 271 / 343
= 79 %
The percentages are similar to each other which shows that being from either state does not mean that there will be an association between the state and the median debt.
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What defines a 1 to 1 function?
A function is considered a one-to-one function, also called an injective function, if it assigns a unique output value to each input value. In other words, a function is one-to-one if no two different input values have the same output value.
A function f(x) is one-to-one if and only if for any two distinct inputs x1 and x2, it holds that f(x1) ≠ f(x2).
One way to determine if a function is one-to-one is to use the horizontal line test:
if any horizontal line intersects the graph of the function at most once, then the function is one-to-one.
A one-to-one function has an inverse function. The inverse function, f^-1(x), is also a function, it assigns to each output value of f(x), an input value such that f^-1(f(x)) = x.
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the number of tornadoes in a given year follows a poisson distribution with mean 3. calculate the variance of the number of tornadoes in a year given that at least one tornado occurs.
So, the variance of the number of tornadoes in a year given that at least one tornado occurs is 3.
The Poisson distribution is a discrete probability distribution that describes the number of events that occur in a fixed interval of time or space, given the average number of events per interval.
For a Poisson distribution with mean λ, the variance is equal to λ.
Given that at least one tornado occurs in a year, the mean number of tornadoes is 3. Therefore, the variance is also equal to 3.
So, the variance of the number of tornadoes in a year given that at least one tornado occurs is 3.
It's worth noting that this result is based on the assumption that the number of tornadoes follows a Poisson distribution with mean 3, which may not always be the case in real-world scenarios. The actual number of tornadoes in a given year can be influenced by various factors such as climate, weather patterns, and geography.
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What is the equation of this graphed line?
y=2x+2
y=-2x-2
y=6x+6
y=-6x-6
By calculating the given equations with points none of the equation represents equation of this graphed line.
What is the equation of the line?
The equation of a straight line is y=mx+c y = m x + c m is the gradient and c is the height at which the line crosses the y -axis, also known as the y-intercept.
We have given the,
y = 2x+2
y=-2x-2
y=6x+6
y=-6x-6
And, the graph.
From the line in the graph we can take the cordinate points which represents the equation of line.
point (1, 2)
By putting this point we can decide the given equation of line:
y=2(1)+2 = 4
y=-2(1)-2 = 0
y=6(1)+6 =12
y=-6(1) - 6 =-12
Hence, by calculating the given equations with points none of the equation represents equation of this graphed line.
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the distribution of the heights of five-year-old children has a mean of 42.5 inches. a pediatrician believes the five-year-old children in a city are taller on average. the pediatrician selects a random sample of 40 five-year-old children and measures their heights. the mean height of the sample is 44.1 inches with a standard deviation of 3.5 inches. do the data provide convincing evidence at the level that the mean height of five-year-old children in this city is greater than 42.5 inches?
The requried, if the p-value is greater than the chosen significance level, we fail to reject the null hypothesis, meaning we don't have enough evidence to conclude that the mean height is greater than 42.5 inches.
Null Hypothesis (H0): The mean height of five-year-old children in the city is not greater than 42.5 inches.
Alternative Hypothesis (Ha): The mean height of five-year-old children in the city is greater than 42.5 inches.
We will conduct a one-sample t-test since we have the sample mean and standard deviation.
Let's calculate the t-statistic and find the corresponding p-value.
The formula for the t-statistic is:
[tex]t=\dfrac{x-\mu}{s/\sqrt n}[/tex]
Where:
x is the sample mean (44.1 inches),
μ is the population mean under the null hypothesis (42.5 inches),
s is the sample standard deviation (3.5 inches),
n is the sample size (40).
Let's calculate the t-statistic:
[tex]t=\dfrac{44.1-42.5}{3.5/\sqrt n}\\t=2.89[/tex]
Now, we need to locate the p-value associated with this t-statistic. The p-value is the probability of observing a t-statistic as extreme as the one calculated (or even more extreme) under the assumption that the null hypothesis is true.
The p-value can be looked up using a t-distribution table or calculated with statistical software. In this matter, since the t-statistic is quite large, the p-value will be very small.
Suppose the p-value is less than the significance level (α) chosen for the test (commonly 0.05). In that case, we reject the null hypothesis in favor of the alternative hypothesis. This means there is convincing evidence that the mean height of five-year-old children in this city is greater than 42.5 inches.
Conversely, if the p-value is greater than the chosen significance level, we fail to reject the null hypothesis, meaning we don't have enough evidence to conclude that the mean height is greater than 42.5 inches.
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