Answer:
Step-by-step explanation rise the 7 over the x and multiply 7 and 100 and put that answer as x
find the indicated z score. the graph depicts the standard normal distribution with mean 0 and standard deviation 1. .9850
Therefore, the indicated z-score is 2.45.
To find the indicated z-score, we need to use a standard normal distribution table. From the graph, we can see that the area to the right of the z-score is 0.9850.
Looking at the standard normal distribution table, we find the closest value to 0.9850 in the body of the table is 2.45. This means that the z-score that corresponds to an area of 0.9850 is 2.45.
It's important to note that the standard deviation of the standard normal distribution is always 1. This is because the standard normal distribution is a normalized version of any normal distribution, where we divide the difference between the observed value and the mean by the standard deviation.
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It is not uncommon for childhood centres to charge a late fee – e.g., a flat fee of $20 plus $1 per minute thereafter (e.g. $50 if 30 minutes late). What are the pros and cons (costs and benefits) of charging parents or carers a fee if they are late to pick up their children?
Do you think that monetary incentives are always successful in motivating behaviour? What might be some limitations or disadvantages of providing monetary incentives?
Charging parents or carers a fee for being late to pick up their children at childhood centers has both pros and cons. The benefits include encouraging punctuality, ensuring the smooth operation of the center, and compensating staff for their extra time.
However, the costs include potential strain on parent-provider relationships, additional stress for parents, and the possibility of creating financial burdens for certain families.
Implementing a late fee policy can be beneficial for childhood centers. Firstly, it incentivizes parents and carers to arrive on time, which helps maintain an organized and efficient schedule for the center. Punctuality promotes a smooth transition between activities, minimizes disruptions, and ensures that staff members can fulfill their responsibilities within the scheduled work hours. Secondly, the fees collected from late pickups can compensate staff members for their additional time and effort, reducing any potential resentment or burnout caused by consistently dealing with tardy parents.
On the other hand, there are costs and potential limitations associated with charging late fees. The policy may strain relationships between parents or carers and the childhood center, as some individuals may perceive it as punitive or unfair. This can lead to negative feelings and tensions between the parents and the center's staff, potentially impacting the overall atmosphere of the facility. Moreover, charging fees for late pickups can cause stress for parents or carers who may already be facing difficulties in managing their time and commitments. Additionally, families with financial constraints may find it challenging to afford the extra cost, potentially exacerbating their financial burden and causing further stress.
Monetary incentives are not always successful in motivating behavior. While financial rewards can be effective in certain circumstances, they may not address the underlying reasons for lateness or incentivize long-term behavioral change. Other factors such as time management skills, unforeseen circumstances, or personal challenges may play a more significant role in determining punctuality.
Furthermore, relying solely on monetary incentives may lead to a mindset where individuals are motivated solely by financial gain, potentially neglecting other aspects of personal growth or responsibility.
In conclusion, charging a late fee at childhood centers can have its advantages in promoting punctuality and compensating staff, but it also comes with potential drawbacks such as strained relationships and added stress for parents.
Monetary incentives are not always the sole solution for motivating behavior, and it is important to consider a holistic approach that takes into account individual circumstances, communication, and support mechanisms to address issues related to lateness.
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27. Find the distance between the pair of points. Round to the nearest tenth is necessary. (-13, -8) and (6, 17)
The distance between the given points is 31.4 units.
Given are two points (-13, -8) and (6, 17) we need to find the distance between them,
We know that the distance between two points is given by =
\(D = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\)
Here,
(x₁, y₁) and (x₂, y₂) are (-13, -8) and (6, 17),
So,
\(D = \sqrt{(6+13)^2+(17+8)^2}\\\\D = \sqrt{19^2+25^2}\\\\D = \sqrt{986}\)
D = 31.4
Hence the distance between the given points is 31.4 units.
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At the market, 888 batteries cost \$10$10dollar sign, 10.
How much do 666 batteries cost?
\$
Answer:
$7.5
Step-by-step explanation:
In garden pam plants the seed 1 3/4 in. below the ground. After one month the tomato plant has grown a total of 11 1/2 in. How many inches is the plant above the ground?
Answer:
4 1/4
Step-by-step explanation:
Turn the mixed numbers in to improper fractions.
find least common denominator.
Subtract them.
Then turn your answer back into a mixed number and you have how much the plant is above the ground which is 4 1/4
in most situations, would it be reasonable to use a level .01 test in conjunction with a sample size of 40,000? why or why not?
In most situations, it would be reasonable to use a level .01 test with a sample size of 40,000 as it provides a high level of statistical power to detect smaller effects and reduce the likelihood of Type I error.
In most situations, it would be reasonable to use a level .01 test in conjunction with a sample size of 40,000. This is because a larger sample size provides more statistical power, meaning the test is more likely to detect a significant difference if one exists.
Additionally, a level .01 test is more conservative than a level .05 test, which reduces the risk of a type I error (rejecting the null hypothesis when it is actually true).
However, it is important to consider the context and specific research question being addressed, as well as potential confounding variables, to determine the appropriate statistical test and significance level for a given study.
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Prove that there are no integers x, y, z such that x² + y² = 8z + 3
it is proven that there are no integers x, y, z such that x² + y² = 8z + 3.
What is Integers?
A whole number is a number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers, while 9.75, 5+, and √2 are not. The set of integers consists of zero, positive natural numbers, also called integers or counting numbers, and their additive inverses.
To prove that there are no integers x, y, z such that x² + y² = 8z + 3, we can use the concept of modulo arithmetic.
First, let's consider the possible values of x² and y² modulo 8:
For any integer n, n² modulo 8 can only be 0, 1, or 4.
Now, let's examine the possible values of 8z + 3 modulo 8:
8z modulo 8 is always 0.
3 modulo 8 is equal to 3.
Therefore, the possible values of x² + y² modulo 8 can only be 0, 1, or 4, while 8z + 3 modulo 8 is equal to 3. Since 0, 1, and 4 are not equal to 3 modulo 8, there are no integers x, y, z that satisfy the equation x² + y² = 8z + 3.
Hence, it is proven that there are no integers x, y, z such that x² + y² = 8z + 3.
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Graph (3,-5) and sslope -1/2
y = (-1/2)x - 7/2 is the equation of the given point and slope.
To graph the point (3, -5) and a line with a slope of -1/2, we can use the point-slope form of a linear equation.
The point-slope form of a linear equation is given by:
y - y1 = m(x - x1)
where (x1, y1) represents a point on the line, and m represents the slope.
Plugging in the values, we have:
y - (-5) = (-1/2)(x - 3)
Simplifying:
y + 5 = (-1/2)x + 3/2
Subtracting 5 from both sides:
y = (-1/2)x + 3/2 - 5
y = (-1/2)x - 7/2
Now we have the equation y = (-1/2)x - 7/2, which represents a line with a slope of -1/2 passing through the point (3, -5).
To graph the line, plot the point (3, -5) on the coordinate plane and then use the slope to find additional points. For every 2 units you move to the right, move 1 unit down to find other points. Connect the plotted points to draw the line.
The resulting graph will show the point (3, -5) and a line with a slope of -1/2.
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Write 3g as a percentage of 20g
Answer:
15%
Step-by-step explanation:
3÷20=0.15
0.15×100=15
Question 1(Multiple Choice Worth 5 points)
(01.02 MC)
Simplify -6 1/4 - (-2 1/8)
Answer:
8 3/8
Step-by-step explanation:
turn the 1/4 into 2/8 then you can see it
PLEASE HELP! I will give brainliest
A) y intercept is (0,3)
C) Axis of symmetry is x = -1
D) Vertex is (-1, 4)
So basically everything but choice B is true.
========================================
Explanation:
Choice A is true because plugging in x = 0 leads to y = 3. Effectively, anything with an x goes away when x = 0 leaving that 3 behind. So finding the y intercept in this form is fairly fast.
-------------------
To check choices B through D, let's convert the equation into vertex form.
y = -1x^2 - 2x + 3 is in the form y = ax^2 + bx + c where
a = -1
b = -2
c = 3
The vertex is located at (h,k) such that h = -b/(2a)
Plug the values of 'a' and 'b' into the equation below
h = -b/(2a)
h = -(-2)/(2*(-1))
h = 2/(-2)
h = -1
The x coordinate of the vertex is x = -1
Then use this to find the y coordinate of the vertex
y = -1x^2 - 2x + 3
y = -1(-1)^2 - 2(-1) + 3
y = 4
The y coordinate of the vertex is 4, meaning k = 4
The vertex overall is (h,k) = (-1, 4)
This shows choice D is true, meaning choice B has to be false.
Choice C is true because the axis of symmetry is the x coordinate of the vertex. This is the vertical line that cuts the parabola into two mirrored halves. This vertical line always goes through the vertex.
I Need Help With This Question
Answer:
Step-by-step explanation:
Dont do it. Just take the detention
The area of a circle will _____ be larger than the area of a polygon circumscribed about the circle.
always
often
sometimes
never
what is the surface area of the regular pyramid given below 9 8 8
The surface area of a regular pyramid can be calculated using the formula: Surface Area = base area + lateral area. To find the base area, we need to determine the shape of the base.
In the given case, the base shape is not specified, so we cannot determine the surface area without additional information. To calculate the surface area of a regular pyramid, we need to consider the base area and the lateral area.
The base area depends on the shape of the base, which is not provided in the given information. Without knowing the shape of the base, we cannot calculate the base area. The lateral area depends on the slant height and perimeter of the base, which are also not provided.
Therefore, without further information, we cannot determine the surface area of the given regular pyramid.
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I need help with all of them
Answer:
Question 3: (D) All real numbers. Question 4: (B) y > 3.
How many cans of paint are needed to cover an area of 2000?
The number of cans required to paint an area of 2000 square units is equal to 5 cans.
As given in the question,
Total area to be painted is equal to 2000 square units.
Area covered by one can of paint is equal to 400 square units
400 square units = 1 can of paint
⇒ 1 square units = ( 1 / 400 ) cans of paint
⇒ 2000 square units = ( 2000 / 400 ) cans of paint
⇒ 2000 square units = 5 cans of paint
Therefore, the number of cans required to paint an area of 2000 square units using given can is equal to 5 cans.
The above question is incomplete, the complete question is:
How many cans of paint are needed to cover an area of 2000 square units if one can of paint covers in area 400 square units?
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This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was that the regular movie attendant enjoyed the movie with 8.3 points and a standard deviation of 0.5 points. What is the percent of people who gave the movie a rating between 6.8 and 8.8? (Write the number as a percent only without a percent sign.)
Answer:
The percentage that of people who gave the movie a rating between 6.8 and 8.8
P(6.8≤X≤8.8) = 83.9≅ 84 percentage
Step-by-step explanation:
Step(i):-
Mean of the Population = 8.3 points
Standard deviation of the Population = 0.5 points
Let 'X' be the random variable in normal distribution
Let X = 6.8
\(Z = \frac{x-mean}{S.D} = \frac{6.8-8.3}{0.5} = -3\)
Let X = 8.8
\(Z = \frac{x-mean}{S.D} = \frac{8.8-8.3}{0.5} = 1\)
The probability that of people who gave the movie a rating between 6.8 and 8.8
P(6.8≤X≤8.8) = P(-3≤Z≤1)
= P(Z≤1)- P(Z≤-3)
= 0.5 + A(1) - ( 0.5 -A(-3))
= A(1) + A(3) (∵A(-3)=A(3)
= 0.3413 +0.4986 (∵ From Normal table)
= 0.8399
Conclusion:-
The percentage that of people who gave the movie a rating between 6.8 and 8.8
P(6.8≤X≤8.8) = 83.9≅ 84 percentage
A company makes a loss of 2 million dollars in its first year of trading. In the following two years it makes a profit of $625 000 per year. What is the average profit or loss per year made by the company over the three years?
Answer: They lose $250000 per year over the three years!
Step-by-step explanation:
First, find the total profit for the two following years
Take $625000 times 2 = $1250000
Next, find the total they made in 3 years
Take -$2000000 of the first year + $1250000 = - $750000
Now we find their average profit per year
Take -$750000 divided by 3 = -$250000
They lose $250000 per year over the three years
Find the coordinates of the point after a 180∘ rotation about the origin.
(2,-3)
Answer: (-2,3)
Step-by-step explanation:
The formula for 180 degrees rotation is (-x,-y).
(2,-3). Plug the formula in, when plugging a positive and a negative, it's negative. When plugging a negative and a negative, it makes a positive.
So (-2, 3)
Super easy question
Answer: The correct answer is A. Addition
Step-by-step explanation:
Let's solve for x in 2x+4y=10
Step 1: Add -4y to both sides.
2x+4y+−4y=10+−4y
2x=−4y+10
Step 2: Divide both sides by 2.
2x/2 = −4y+10/2
x = −2y +5
Now let's solve for x in 5x+4y = -12
Step 1: Add -4y to both sides.
5x+4y+−4y=−12+−4y
5x=−4y−12
Step 2: Divide both sides by 5.
5x/5 = −4y−12/5
x = −4/5y + −12/5
Here is what solving for Y looks like
Let's solve for y in 2x+4y=10
Step 1: Add -2x to both sides.
2x+4y+−2x=10+−2x
4y=−2x+10
Step 2: Divide both sides by 4.
4y/4 = −2x+10/4
y = −1/2x + 5/2
Now let's solve for y in 5x+4y = -12
Step 1: Add -5x to both sides.
5x+4y+−5x=−12+−5x
4y=−5x−12
Step 2: Divide both sides by 4.
4y/4 = −5x−12/4
y = −5/4 x−3
addition. thanks for the points. /j
Given f(x), which function is the inverse?
f(x) = 3x - 5
A) g(y) = 3y + 5
B) g(y) = // +5
C) g(y) = 3+5 3
D) g(y) = 5y 3
Answer:
g(y) = 1/3y + 5/3
Step-by-step Explanation:
We know that f(x) is synonymous with y so we can rewrite f(x) as y = 3x -5
To find the inverse of the function, we can switch y with x and x with y:
x = 3y - 5
Now we can isolate y to find the inverse of f(x):
(x = 3y - 5) + 5
(x + 5 = 3y) / 3
x/3 + 5/3 = y
1/3x + 5/3 = y
Thus, the inverse of f(x) is f^-1(x) = 1/3x + 5/3. Since we want to write the inverse in terms of y, we get g(y) = 1/3y + 5/3.
If this answer doesn't match your answer choices (some of the answer choices you provided are unclear), please attach a pic and I can help you figure out which answer choice is correct)
Two concentric circles are of radii 5 cm and 3 cm. Determine the length of the chord of the larger circle which touches the smaller circle.
Answer: 4
Step-by-step explanation:
In triangle OCB,
OB2 = OC2 + BC2
52 = 32 + BC2
BC2 = 25 - 9
BC2 = 16
BC = 4
let x be a number selected at random (uniformly) from the set 1, 2, 3, 4, 5. let y be a number selected then at random (uniformly) form the set 1, 2, . . . , x. (a) (3 points) find the joint probability mass function of the pair (x, y ). (b) (3 points) are x and y independent? explain your answer.
The joint probability mass function of (x, y) is given by P(Xi, Yj) = (1/i) * (1/5) for 1 ≤ j ≤ i ≤ 5 and 0 otherwise. x and y are not independent because their joint PMF does not factorize into the product of their individual PMFs.
(a) The joint probability mass function (PMF) of the pair (x, y) can be calculated by considering the probabilities of each possible outcome.
Let's denote the event "x = i" as Xi and the event "y = j" as Yj. We can calculate the joint PMF P(Xi, Yj) by considering the conditions for each pair (i, j).
P(Xi, Yj) = P(Yj | Xi) * P(Xi)
Since x is uniformly selected from the set {1, 2, 3, 4, 5}, the probability P(Xi) for each value of i is 1/5.
Now let's consider the conditional probability P(Yj | Xi). For a given value of x = i, the possible values of y are {1, 2, ..., i}, each with equal probability of 1/i. Therefore, P(Yj | Xi) = 1/i for j ≤ i and 0 for j > i.
Putting it all together, the joint PMF for (x, y) is:
P(Xi, Yj) = (1/i) * (1/5) for 1 ≤ j ≤ i ≤ 5
P(Xi, Yj) = 0 otherwise
(b) x and y are not independent. To determine independence, we need to check if the joint PMF factorizes into the product of the individual PMFs for x and y.
In this case, the joint PMF does not factorize because P(Xi, Yj) ≠ P(Xi) * P(Yj) for all values of (i, j). Therefore, x and y are not independent.
The value of y depends on the value of x since the range of y is determined by x. If we know the value of x, it restricts the possibilities for y. Thus, the outcome of y is not independent of the outcome of x.
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Miguel created the ratio table below to show how he uses the money he earns at work. Miguel’s Money Money Earned Money Saved $10.00 $7.50 $50.00 $37.50 $120.00 ? $150.00 $112.50 How much money will he save if he earns $120.00? $30.00 $45.00 $90.00 $75.00
Answer:
$90.00
Step-by-step explanation:
Answer:
im pretty sure is $90.00
Step-by-step explanation:
i got it right
Find the percent of change
3/8 to 5/8
Answer:
66.7%
Step-by-step explanation:
From 3/5 to 5/8 it's the same percent change as from 3 to 5.
percent change = (new number - old number)/(old number) * 100%
percent change = (5 - 3)/3 * 100%
percent change = 2/3 * 100%
percent change = 66.666...%
Answer: 66.7%
Plz help me out it would be a help
Answer:
question 2 answer. option. a. 55
Step-by-step explanation:
diameter of semi circular window is 35 inches
the radius is 17.5
perimeter of semicircular window =pie x radius
= 22 /7 ×17.5
=55 inches
Find m2).
K
2
J
Write your answer as an integer or as a decimal rounded to the nearest tenth.
m2] =
Submit
The measure of angle J is 51.3 degrees (rounded to the nearest tenth).
We can use the Pythagorean theorem to find the length of the hypotenuse KJ of the right triangle KIJ. The Pythagorean theorem states that for a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. Therefore, we have:
KJ² = KI² + IJ²
Substituting the given values, we get:
KJ² = 4² + 2²
KJ²= 20
Taking the square root of both sides, we get:
KJ = √20 = 2√5
Now, we can use the definition of cosine to find the measure of angle J
cos(J) = 2 / (2√5)
Simplifying the expression, we get:
cos(J) = √5 / 5
Taking the inverse cosine of both sides, we get:
J = cos⁽⁻¹⁾(√5 / 5)
We find that the inverse cosine of √5 / 5 is approximately 51.3 degrees. Therefore, the measure of angle J is 51.3 degrees (rounded to the nearest tenth).
What is Cosine of a right angled triangle?The cosine of an angle in a right triangle equals the adjacent side divided by the hypotenuse.
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a textbook company ships its books in boxes that can hold 30 pounds. one particular order calls for a shipment of 800 books. if each book weighs 1.4 kilograms, how many boxes will be required to fulfill this order
83 boxes are required to carry 800 books.
According to the question:
One Box can hold weight = 30 pounds
We know that , 1 pound= 0.45 kg
hence, 30 pounds = 30 x 0.45 = 13.5kg
hence, one box can carry 13.5 kg of weight.
Now,
Weight of 1 book = 1.4 kg
So, Total Weight of 800 books= 1.4 x 800 kg
And , No. of boxes required to carry 800 books = (1.4 x 800)/13.5 = 82.96
or approximately 83 boxes
Hence, 83 boxes are required to carry 800 books.
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graph the line perpendicular to Y=4 that passes through -6,3
Solution
graph the line perpendicular to Y=4 that passes through -6,3
Since we have a horizontal line we can find the solution just with this:
X= -6
Find the area of triangle XYZ if length XY equals 7 and length XZ equals 4.3. You also
know that angle Y equals 79°.
Answer:
A ≈ 14.8 units²
Step-by-step explanation:
the area (A) of the triangle is calculated as
A = \(\frac{1}{2}\) yz sin Y ( that is 2 sides and the angle between them )
where x is the side opposite ∠ X and z the side opposite ∠ Z
here y = XZ = 4.3 and z = XY = 7 , then
A = \(\frac{1}{2}\) × 4.3 × 7 × sin79°
= 15.05 × sin79°
≈ 14.8 units² ( to 1 decimal place )