2 students to get a grade C and 0 students to get a grade A.
What is the mean?In mathematics , in addition to the mode and median, the mean is one of the measures of central tendency. the mean is the average of the values in the given set. It indicates that values in a particular data set are distributed equally.The total values provided in a datasheet must be added, and the sum must be divided by the total number of values in order to determine the mean.
What is the z-score?The relation between a value and a set of values of mean is described by the statistical measurement is known as the Z-score. Standard deviations from the mean are used to measure Z-score. A Z-score of zero means the data point of score is the same as the mean score.
We require the distribution of scores in order to estimate the number of students who should earn a given grade. We may determine the z-score for each grade using the mean and standard deviation, presuming that the scores have a normal distribution.
(a) We must locate the z-score equivalent to a C grade in order to establish the number of pupils who should receive a C. Assuming that a C equals a score between 70 and 79, the following formula can be used to determine the z-scores for these values:
(70 - 60) / 5 = 2 is the z-score for 70.
79's z-score is (79 - 60) / 5 = 3.8
We can calculate the percentage of the distribution that falls between these two z-scores using a z-table or a calculator:
P(2 ≤ z ≤ 3.8)
This implies that roughly 4.55% of the students to get a C grade. We can multiply this percentage by the total number of students Than we get
0.0455 x 35 ≈ 2
therefore,approximately 2 students to get a grade C.
b) the z-score to calculate the number of pupils who should receive an grade A. Considering that a grade A of 90 or above 90,Now we can calculate the z-score for 90
than we get .
the z-score for 90 = (90 - 60) / 5 = 6 .
We calculate the percentage of the distribution that lies to the right of this z-score using a z-table or a calculator:
P(z ≥ 6) ≈ 0
therefore,0 students to get a grade A.
Learn more about Standard Deviation Here:
https://brainly.com/question/475676
#SPJ1
nangle
In order to justify your general statement above (to give a reason why it is true), construct the angles A, B
and C of triangle 1 around point M as in the diagram below.
H
Are [MN] and [ML] on the same straight line?
Answer:
MN and ML are on the same straight line.
i start with y, add 5 and then, double the result
Answer:
2y + 10Step-by-step explanation:
i start with y, add 5 and then, double the result
y add 5
y + 5 double the result
(y + 5) × 2 solve
2y + 10
or
(y + 5) × 2 =
2y + 10
Help me please, I need help! Thanks
Answer:
5w² + 4
Step-by-step explanation:
there's no like terms, so just write the expression again
URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
Answer:
The correct frequency table is table c.
victoria has another account at the bank that pays 2 1/2% simple interest. how much inter will she earn in 8 years on an initial deposit of 250$ assuming she neither adds to nor withdraws from the account
rest, Using the simple interest formula, P x R x T, the total interest that Victoria will earn in 8 years on an initial deposit of $250 at 2¹/₂% simple interest is $50.
What is simple interest?Simple interest is a system of interest that charges interest only on the principal at the end of each period.
Unlike compound interest, the simple interest system does not accumulated interest in order to charge interest on accumulated interest.
The initial deposit = $250
Simple interest rate = 2¹/₂%
Investment period = 8 years.
Simple interest = $50 ($250 x 2¹/₂% x 8)
Learn more about the simple interest system at https://brainly.com/question/25793394.
#SPJ1
A sample contains 25 cells. The number of cells quadruples every hour. Does this represent an exponential function? Why or why not?
Yes, this represents an exponential function.
What is exponential function ?
The exponential growth or decay of a given collection of data is done using an exponential function, which is a mathematical function.
Because the growth rate is inversely correlated with the function's present value, this function is exponential. Regardless of how many cells were present the previous hour the number of cells is multiplied by the same factor of 4 every hour.
Therefore, One can estimate the number of cells for every hour x by evaluating the function at a specific value of x. The function f(x) = 4x implies exponential growth.
Learn more about exponential function here : brainly.com/question/30127596
#SPJ1
Determine the perimeter of the right triangle shown.
right triangle with vertices at negative 5 comma 3, negative 5 comma negative 2, and 7 comma negative 2
The perimeter of the right triangle is 30 units.
What is perimeter?
In geometry, perimeter refers to the total length of the boundary of a two-dimensional shape, such as a polygon or a circle. It is the sum of the lengths of all the sides of the shape.
To find the perimeter of the right triangle, we need to determine the lengths of its sides first.
Using the distance formula, we can find the lengths of the three sides of the triangle:
Side 1: From (-5, 3) to (-5, -2)
[tex]Length = \sqrt{[(3 - (-2))^2 + (-5 - (-5))^2]} = \sqrt{[5^2]} = 5[/tex]
Side 2: From (-5, -2) to (7, -2)
[tex]Length = \sqrt{[(7 - (-5))^2 + (-2 - (-2))^2]} = \sqrt{[12^2]} = 12[/tex]
Side 3: From (7, -2) to (-5, 3)
[tex]Length = \sqrt{[(-5 - 7)^2 + (3 - (-2))^2]} = \sqrt{[144 + 25]} = \sqrt{[169]} = 13[/tex]
We know that the triangle is a right triangle because two of its sides (Side 2 and Side 3) form a straight line along the x-axis, and the third side (Side 1) is perpendicular to this line.
Therefore, Side 1 is the hypotenuse, and Sides 2 and 3 are the legs of the right triangle.
To find the perimeter, we add up the lengths of all three sides:
Perimeter = Side 1 + Side 2 + Side 3 = 5 + 12 + 13 = 30
Therefore, the perimeter of the right triangle is 30 units.
To learn more about perimeter visit:
https://brainly.com/question/397857
#SPJ1
Can someone please help me
The height of point A is 0 feet. However, this is not the actual height of point A, as it is at the highest point on the Ferris Wheel, which is 185 feet as calculated previously.
How to solveThe height of point A on the Ferris Wheel can be calculated using the sine function, as it is the vertical component of the point's position. The center of the Ferris Wheel is 100 feet off the ground, and its radius is 85 feet.
Let's denote the height of point A as h_A, which is the vertical distance from the center of the Ferris Wheel to point A.
Since point A is at the 0 radian position, it is at the highest point on the Ferris Wheel. At this point, the height of point A is equal to the sum of the radius and the center's height:
h_A = radius + center's height
h_A = 85 + 100
h_A = 185 feet
So, the height of point A off the ground is 185 feet.
To estimate the value of h_A using the sine function, we can use the fact that at any given angle θ on the unit circle, the height of the point on the circle is given by the sine of that angle multiplied by the radius. In this case, since point A is at the highest point on the Ferris Wheel, we can use the sine of 0 radians (which is 0) to estimate the height of point A:
h_A = radius * sin(0)
h_A = 85 * 0
h_A = 0
So, using the sine function, we estimate that the height of point A is 0 feet. However, this is not the actual height of point A, as it is at the highest point on the Ferris Wheel, which is 185 feet as calculated previously.
Read more about sine function here:
https://brainly.com/question/21902442
#SPJ1
Myron's family is putting a pool in their backyard. He is so excited that he wants to figure out how
long it will take to fill the pool! He found the blueprints for the pool and recreated the sketches at
right, but he is not quite sure how to use them to find the volume of the pool.
What three-dimensional figures does Myron need to be able to find the volume of before he can
determine the volume of the pool?
To find the volume of an irregular 3D shape like Myron's pool, he needs to determine:
1. The length
2. The width
3. The depth
With those three measurements, he can plug them into the formula for volume of a rectangular prism:
Volume = Length x Width x Depth
So if the pool is:
Length = 20 ft
Width = 10 ft
Depth = 5 ft
Then the volume would be:
20 ft x 10 ft x 5 ft = 1000 cubic feet
Does this make sense? Let me know if Myron has any other questions!
Scores on the GRE (graduate record examination) are normally distributed with a mean of 553 and a standard deviation of 112. Use the 68-95-99.7 rule to find
the percentage of people taking the test who score between 421 and 645
The percentages of people taking the test who scores between 421 and 645 is__%
The percentages of people taking the test who scores between 421 and 645 is: 68 %
How to use the empirical rule of statistics?The empirical rule, also referred to as the three-sigma rule or the 68-95-99.7 rule, is defined as a statistical rule which states that almost all observed data for a normal distribution will fall within three standard deviations (denoted by σ) of the mean or average (denoted by µ).
We are given:
Sample mean: x' = 553
standard deviation; s = 112
Thus:
x' - ns = 421
x' + ns = 645
Where n is the number of standard deviations from the mean. Thus:
553 - 112s = 421
112s = 553 - 421
112s = 132
s = 132/112
s ≈ 1
So 1 standard deviation from the means indicates a percentage of 68%
Read more about empirical rule of statistics at: https://brainly.com/question/10093236
#SPJ1
Caris has a carton of 12 eggs, two of which have brown shells while the rest have white shells. Caris randomly chooses a brown egg from the carton.
Answer:
The probability of choosing a brown egg from the carton is 2/12 or 1/6. This is because there are two brown eggs in the carton and a total of twelve eggs, so the probability of choosing a brown egg is 2/12 or 1/6.
Two friends board an airliner just before departure time. There are only 9 seats left, 2 of which are aisle seats. How many ways:
sits on the aisle?
The 2 people can arrange themselves in
ways.
The 2 people from the 9 people can sit on the aisle in 72 ways
How many ways can the 2 people sit on the aisle?from the question, we have the following parameters that can be used in our computation:
Number of peiple = 9
Number of seats = 2
Using the above as a guide, we have the following:
n = 9 and r = 2
The can arrange themselves in nPr ways.
Where
nPr = n!/(n - r)!
Substitute the known values in the above equation, so, we have the following representation
9P2 = 9!/(9 - 2)!
Evaluate the expression
9P2 = 72
Hence, the number of ways they can arrange themselves is 72
Read more about permutation at
https://brainly.com/question/11732255
#SPJ1
The distance between Eilat and Jerusalem is 292 kilometers. Give this distance in miles. Round the answer to the nearest tenth.
The distance between Eilat and Jerusalem is 181.4 miles.
To convert kilometers to miles, we need to multiply the number of kilometers by 0.621371, which is the conversion factor from kilometers to miles. Therefore, to convert the distance between Eilat and Jerusalem from kilometers to miles, we can use the following formula:
distance in miles = distance in kilometers × 0.621371
Substituting the given distance of 292 kilometers into the formula, we get:
distance in miles = 292 km × 0.621371 = 181.417852 miles
Rounding this answer to the nearest tenth, we get:
distance in miles ≈ 181.4 miles
Therefore, the distance between Eilat and Jerusalem is approximately 181.4 miles.
To learn more about miles here:
brainly.com/question/23245414
#SPJ1
Is 8.005 kilometers or 8.7 kilometers the longest?
8.7 kilometers is longer than 8.005 kilometers.
Answer:
8.7 is longer than 8.005
Step-by-step explanation:
Let f(x) = x² - 3. Let g(x) = (x + 2)² - 5. Select all statements below that describe the transformation of f(x) to g(x).
The vertex of g(x) is translated left by 2 units and down by 5 units compared to the vertex of f(x).
The shape of the parabola for g(x) is the same as the shape of the parabola for f(x).
The axis of symmetry for g(x) is the same as the axis of symmetry for f(x).
The minimum point of g(x) is lower than the minimum point of f(x).
URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS
The probabilities for this problem are given as follows:
Purchase price less than $20,000, repair cost less than $10,000: 45.74% -> about 46%.Repair costs less than $10,000, purchase cost more than $40,000: 20.3 -> about 20%.How to calculate a probability?A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.
The number of cars with purchase prices less than $20,000 is given as follows:
86 + 67 + 35 = 188.
Of those 188 cars, 86 had repair costs less than $10,000, hence the probability is given as follows:
p = 86/188
p = 0.4574.
The number of cars with repair costs less than $10,000 is given as follows:
86 + 71 + 40 = 197.
Of those, 40 had a purchase price of more than $40,000, hence the probability is given as follows:
p = 40/197
p = 0.203.
More can be learned about probability at https://brainly.com/question/24756209
#SPJ1
Danielle likes to purchase items at estate sales, clean them up, then resale them online for a profit. She recently purchased an antique dresser with a mirror at an estate sale, cleaned it up, and advertised it for 250% of her purchase price. Danielle sold the dresser for $255, which was 15% less than the advertised price.
To the nearest whole dollar, how much did Danielle purchase the antique dresser for and what was her initial advertised price?
A. purchase price: $120, advertised price: $300
B. purchase price: $108, advertised price: $270
C. purchase price: $130, advertised price: $325
D. purchase price: $117, advertised price: $293
The purchase price of the anitque dresser purchased by Danielle is $120 and the advertised price is $ 300 after which it was sold on profit of $255. Correct answer:optionA
What is profit?
The extra money is left after paying your business expenses is your profit. Gross profit, operating profit, and net profit are the three primary types of profit. The cost foundation for determining profit or loss when selling a product is the price the buyer pays at the time of purchase, known as the purchase price. The price of a product as advertised for marketing purposes is known as the marketed price.
Let us consider the purchase price of antique dresser with mirror= p
Given that the advertised price= 250% of her purchase price
=[tex]\frac{250}{100}[/tex] of p
=[tex]\frac{250}{100}[/tex] p
=[tex]\frac{250 p}{100}[/tex]
Also given that the selling price which was 15% less than advertised price= $255
advertised price - 15% of advertised price =$255
[tex]\frac{250 p}{100}[/tex] - 15% of [tex]\frac{250 p}{100}[/tex] =$255
[tex]\frac{250p}{100} - \frac{15}{100} of \frac{250p}{100}[/tex] =$255
[tex]\frac{250p}{100} - \frac{3750p}{10000}[/tex] =$255
[tex]\frac{250p}{100} - \frac{375p}{1000}[/tex] =$255
[tex]\frac{2500p - 375p}{1000}[/tex] =$255
[tex]\frac{2125p}{1000}[/tex] =$255
p = [tex]\frac{255 (1000)}{2125}[/tex]
p = $120
The purchasing price is $120
Advertised price =[tex]\frac{250 p}{100}[/tex]
= [tex]\frac{250(120)}{100}[/tex]
= 25 x 12
= $ 300
The Advertised price is $ 300
To know more about profit, visit:
https://brainly.com/question/26483369
#SPJ1
The figure on the right is a scaled copy of the
figure on the left.
V
U
W
T
H
I
G
J
The side GJ in the big one corresponds to the side WT in the small one.
It's not possible to find the scale factor between the two drawings, because there's no numerical information given to show us the relationship between any pair of corresponding sides. (This information is probably there in the book or on the homework sheet you copied the problem from, but for some strange reason, you didn't include it in what you decided to show us.)
New center 13 has just released tomorrow’s weather forecast high temperature is 74° and the low temperature is have that of the high temperature. What is the low temperature
If the high temperature is 74° and the low temperature is have that of the high temperature then low temperature is 37°
Given that New center 13 has just released tomorrow’s weather forecast high temperature is 74°
High temperature = 74°
The low temperature is have that of the high temperature
Low temperature =1/2× High temperature
=1/2×74
=37
Hence, If the high temperature is 74° and the low temperature is have that of the high temperature then low temperature is 37°
To learn more on Equation:
https://brainly.com/question/10413253
#SPJ1
Find the value of x, y, and z in the rhombus below.
(-y-5)
(-27+8)
(-10x-8)
989
A student claims that all squares are congruent to each other. is this true or false?
Answer: False.
Step-by-step explanation:
Squares have to have the same shape and size to be congruent. Therefore, not all squares are congruent, since not all of them are the same size. ... This means that they have the same shape, although not necessarily the same size.
Solve for x.
A) 6
B) 9
9)
D)
15
4
3
5
The value of x in the given chords is determined as 9.
What is the measure of x?
The measure of length x is calculated by applying the following formula.
Based on the angle of intersecting chord theorem, we will have the following equation.
3 (3 + x ) = 4 ( 4 + 5 )
9 + 3x = 36
collect similar terms ang solve for x;
3x = 36 - 9
3x = 27
divide both sides of the equation by 3;
3x/3 = 27/3
x = 9
Thus, the value of x in the given chords is determined by applying chord theorem.
Learn more about chord lengths here: brainly.com/question/23732231
#SPJ1
Please answer this question, I’ll give brainliest and no chatgpt please!!
Q5. If you heat a 0.45 kg sample of an unknown substance to a temperature of 80 °C then quickly transfer it into a beaker that contains 0.70 kg of water at 15 °C (the specific heat capacity of the water is 4200 J/kg: C), the highest temperature that the sample and water will attain is 21 °C. What is the heat capacity of the sample? [4 marks]
URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
The final counts are:
58 students interested in athletics but not academic clubs, 118 students interested in academic clubs but not athletics, 96 students not interested in academic clubs, 156 students not interested in athletics.How to solveGiven a survey of 240 students, 35% of students were interested in athletics, which is equal to 84 students.
3/5 of students were interested in academic clubs, which is equal to 144 students.
26 students were interested in both athletics and academic clubs.
Using this information, we can fill in the remaining cells of a table to show the number of students in each category.
The final counts are:
58 students interested in athletics but not academic clubs, 118 students interested in academic clubs but not athletics, 96 students not interested in academic clubs, 156 students not interested in athletics.Read more about samples here:
https://brainly.com/question/27829028
#SPJ1
Simplify the expression.
2e + tr + 4y + e - y + tr
Answer:
3e + 3y + 2tr
Step-by-step explanation:
2e + tr + 4y + e - y + tr
=> (2e + e) + (tr + tr) + (4y - y)
=> 3e + 2tr + 3y
=> 3e + 3y + 2tr
Answer: The answer is 3e + 3y - 2tr
Step-by-step explanation:
2e + tr + 4y + e - y + tr
=(2e + e) + (tr + tr) + (4y- y)
=3e + 2tr + 3y
=3e + 3y +2tr
Help now please math will briain list
According to the given information, the one angle on the straight line inside a circle is 135 then the value of the x = 4 as both angles are supplementary angles.
What are supplementary angles?Supplementary angles are two angles whose sum is 180 degrees. In other words, if we add the measures of two supplementary angles, the result is always 180 degrees.
When two lines intersect, they form four angles at the intersection point. If two of these angles are supplementary, they are called adjacent supplementary angles. In this case, they share a common side and a common vertex, and their non-shared sides form a straight line.
For example, if angle A and angle B are adjacent angles, and angle A measures 120 degrees, then angle B must measure 60 degrees, since 120 + 60 = 180.
According to the given informationIf the two angles are on a straight line, then they are supplementary, meaning their sum is 180 degrees. Therefore, we can set up the equation:
135 + (11x + 1) = 180
Simplifying the left side, we get:
136 + 11x = 180
Subtracting 136 from both sides, we get:
11x = 44
Dividing both sides by 11, we get:
x = 4
Therefore, the value of x is 4.
To know more about the supplementary angles visit:
brainly.com/question/18164299
#SPJ1
A plane moving at 450 miles per hour is flying in your direction. At one moment the angle formed between the ground and your line of sight to the plane is 45 degrees. One minute later the angle is 60 degrees. Find the altitude of the plane. Make sure to draw a complete diagram, show all calculations and explain your process.
The altitude of the plane is approximately 21.65 miles.
What is altitude means ?An altitude of a triangle is a line segment through a vertex and perpendicular to (i.e., forming a right angle with) a line containing the base (the side opposite the vertex).
We have an observer on the ground (you) and a plane flying towards you. Let's call the distance between the observer and the point directly below the plane "x", and let's call the altitude of the plane "h".
At the first moment, the angle between the ground and your line of sight to the plane is 45 degrees. This means that the angle between the plane's altitude and the ground is also 45 degrees (since the plane is flying horizontally towards you). We can use trigonometry to find the value of "x" in terms of "h".
In the right triangle formed by the observer, the point directly below the plane, and the plane's altitude, we have:
tan(45) = h/x
Since tan(45) = 1, we can simplify this to:
h/x = 1
h = x
So the distance between the observer and the point directly below the plane is equal to the altitude of the plane.
One minute later, the angle between the ground and your line of sight to the plane is 60 degrees. We can use the same approach to find the new value of "x" in terms of "h".
In the right triangle formed by the observer, the point directly below the plane, and the plane's altitude, we have:
tan(60) = h/(x + 450/60)
Simplifying this, we get:
h = (x + 7.5h) * sqrt(3)
Solving for "x", we get:
x = (h / sqrt(3)) - 7.5h
Now we can substitute the value of "x" from the first moment (which is equal to the altitude of the plane) into this equation to find the altitude of the plane:
h = (h / sqrt(3)) - 7.5h
h = h(1 / sqrt(3) - 7.5)
h = 21.65 miles (rounded to two decimal places)
Therefore, the altitude of the plane is approximately 21.65 miles.
Learn more about Right angle here
https://brainly.com/question/7116550
#SPJ1
6th grade math help ty
The surface area of this cylinder is about 45,413.59 square yards.
How to calculate surface area of a cylinder?In Mathematics and Geometry, the surface area (SA) of a cylinder can be calculated by using this mathematical equation (formula):
SA = 2πrh + 2πr²
Where:
h represents the height.r represents the radius.From the circumference of the outside of the cylinder, the radius can be calculated as follows;
Circumference = 2πr
512.49 = 2(3.14)r
Radius, r = 512.49/6.28 = 81.61 yards.
By substituting the given parameters into the surface area of a cylinder formula, we have;
Surface area (SA) of cylinder = (2 × 3.14 × 81.61 × 7) + 2 × 3.14 × 81.61²
Surface area (SA) of cylinder = 3,587.58 + 41,826.01
Surface area (SA) of cylinder = 45,413.59 square yards.
Read more on surface area here: brainly.com/question/26396269
#SPJ1
which ones is a function and not a function
Answer:
No,No,No,Yes,No,Yes
Step-by-step explanation:
Help please -A special safe lets you choose from 5 symbols for a 3-symbol-long pass code. You may enter a symbol any number of times. How many potential pass codes are there?
Answer:
125
Step-by-step explanation:
the statement " 5 symbols for a 3-symbols- long pass code" in mathematics simply means 5 has a power of 3 or 5^3 = 5×5×5= 125