Using it's concept, it is found that the marginal relative frequency for students who plan to attend college is of 82%.
What is a relative frequency?A relative frequency is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, there are a total of 82 students, 67 of which plan to attend college, hence the relative frequency is:
f = 67/82 = 0.82 = 82%.
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Answer:
82%
Step-by-step explanation:
The answer above is correct.
A ladder leans against a wall. The foot of the ladder is 8 feet from the wall, and the top of the ladder is pulled 1 foot away from the wall. How far will the top of the ladder slide down the wall? (HINT: Draw the coordinate axes and place the
ladder up against the y-axis.)
Using Pythagoras theorem, the top of the ladder will slide down the wall 1.64 ft
What length will the ladder slide down the wall?The ladder leaning against the wall forms a right-angled triangle of sides 8 ft and 6 ft.
The length of the ladder is y.
Using Pythagoras theorem:
[tex]y = \sqrt{8^{2} + 6^{2}} = 10 \:ft[/tex]
When the ladder is pulled 1 foot away from the wall, the new height, h the ladder rises up the wall is given below:
[tex]h = \sqrt{10^{2} - 9^{2}} = 4.36 \:ft[/tex]
The top of the ladder will slide 6 - 4.36 ft = 1.64 ft
In conclusion, the length the ladder will slide down is obtained using Pythagoras theorem.
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A hacker is trying to guess someone's password. The hacker knows (somehow) that the password is 5 digits long, and that each digit could be a number between 0 and 4. Assume that the hacker makes random guesses.
What is the probability that the hacker guesses the password on his first try? Please report the answer to four decimal places.
The probability that the hacker guesses the password in first go is
[tex]\dfrac{1}{5^5}[/tex]
While statistics examines the frequency of previous events, probability deals with estimating the possibility of future events.
The primary goal of the theoretical branch of mathematics known as the probability is the investigation of the consequences of mathematical concepts. At its core, statistics is a field of mathematics that seeks to explain observations in the actual world.
Both topics are significant, pertinent, and helpful. However, they are distinct, and appreciating this difference is essential to correctly assessing the applicability of mathematical evidence.
Since sample space has 5⁵ possibilities.
The event space has only one possibility which is to successfully hack the password perfectly.
Hence, the probability is
[tex]\dfrac{1}{5^5}[/tex]
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The 3kg object in Figure is released from rest at a height of on a curved frictionless ramp.
At the foot of the ramp is a spring of force constant 400N/m. The object slides down the
ramp and into the spring, compressing it a distance before coming momentarily to rest.
a) Find
b) Describe the motion of the object (if any) after
the block momentarily comes to rest?
The object compresses the spring up to 0.8577m.
What is Potential Energy?Potential Energy is the energy possessed by an object at rest.
The object is falling from the rest and it is assumed that the friction on the ramp is zero and the air resistance is also considered to be zero so only the gravitational force acts and the total potential energy gets converted to Kinetic Energy.
The total amount of potential energy at the top of the ramp is given by
Ep=mgh
Ep=3 * 9.81 *5
Ep=147.15 Joules
This is equal to kinetic energy.
From the formula for elastic potential energy
The distance up to which the spring is compressed is determined
The force constant = 400N/m
147.15 =(1/2)k(x²)
294.3=(400)(x²)
0.73575=x²
x=0.8577 m
So, the object compresses the spring up to 0.8577m.
When the object compresses the spring, the potential energy of the spring is converted into Kinetic Energy so it will push the object back again.To know more about Potential Energy
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If twice a number, added to 3 is divided by the number plus 5, the result is three halves. Find the number.
The number is…..
Answer:2
Step-by-step explanation:
(2x+5)/3 = 3/2
Multiply both sides by 3:
2x + 5 = 9/2
Subtract 5 from both sides:
2x = 9/2 - 5 = 9/2 - 10/2 = 3/2
Divide both sides by :
x = 3/4
Answer:
-1/3
Step-by-step explanation:
A number x is multiplied by 2, then has 3 added to it, then is divided by x+5, and the answer is 3 halves.
Or, as an equation:
[tex] \frac{2x + 3}{x + 5} = \frac{3}{2} [/tex]
Let's cross multiply:
[tex]4(2x + 3) = 2(x + 5)[/tex]
Expand:
[tex]8x + 12 = 2x + 10[/tex]
Now solve:
[tex]6x + 12 = 10[/tex]
[tex]6x = -2[/tex]
[tex]x = \frac{-1}{3} [/tex]
So the answer is -1/3
Find the absolute extreme of the function on the closed interval. y=9e^xsinx , [0,pi]
For convenience sake, I will let [tex]y=f(x)=9e^{x}\sin x[/tex]
First, we evaluate the function at the endpoints of the interval.
[tex]f(0)=9e^{0}\sin(0)=0\\\\f(\pi)=9e^{\pi}\sin(\pi)=0[/tex]
Then, we need to find the critical points.
We can start by taking the derivative using the power rule.
[tex]f'(x)=9e^{x} \frac{d}{dx} \sin x+9\sin x \frac{d}{dx} e^{x}=9e^{x}(\cos x+\sin x)[/tex]
Setting this equal to 0,
[tex]9e^x (\cos x+\sin x)=0[/tex]
Since [tex]9e^x > 0[/tex], we can divide both sides by [tex]9e^x[/tex].
[tex]\cos x+\sin x=0\\\\\sin x=-\cos x\\\\\tan x=-1\\\\x=\frac{3\pi}{4}[/tex]
[tex]f\left(\frac{3\pi}{4} \right)=9e^{3\pi/4}\sin \left(\frac{3\pi}{4} \right)=\frac{9\sqrt{2}e^{3\pi/4}}{2}[/tex]
So, the absolute minimum is [tex]\boxed{\left(\frac{3\pi}{4}, \frac{9\sqrt{2}e^{3\pi/4}}{\sqrt{2}} \right)}[/tex] and the absolute minima are [tex]\boxed{(0,0), (\pi, 0)}[/tex]
HELP FASTqkefjiwgjhjgjtgth
(3x-5)/2 = 8
3x - 5 = 2 × 8
3x - 5 = 16
3x = 16 + 5
3x = 21
x = 21/3
x = 7
Answer:
Step-by-step explanation:
Equation
(3x - 5)/2 = 8 Multiply both sides by 2
2*(3x - 5)/2 = 8 * 2 Combine
3x - 5 = 16 The 2s on the left cancel. Add 5 to each side
3x - 5 + 5 = 16+5 Combine
3x = 21 Divide both sides by 3
3x/3 = 21/3
x = 7
Answer: x = 7
In a 24 marathon, solve the 24 puzzle given by the poster above you, and post a new 24 puzzle of your own!
Answer:
At Less In Number 20
Step-by-step explanation:
1234567891011121314151617181920
A carpenter constructed a rectangular sandbox with a capacity of 10 cubic feet. If the carpenter were to make a similar sandbox twice as long, twice as wide, and twice as high as the first sandbox, what would be the capacity, in cubic feet, of the second sandbox?
Considering the volume of a rectangular prism, the capacity of the second sandbox would be of 80 cubic feet.
What is the volume of a rectangular prism?The volume of a rectangular prism with length l, width w and height h is given by the multiplication of the measures, that is:
V = lwh.
In this problem, the capacity is of 10 cubic feet, that is:
V = lwh = 10.
When each measure is doubled, the volume will be given as follows:
V= 2l x 2w x 2h = (2 x 2 x 2)lwh = 8lwh = 8V = 80 cubic feet.
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Find the principal on a savings account with 1.6% interest rate that has earned $25.65 over 2 years.
Answer:
801.5625
Step-by-step explanation:
25.65×100/1.6×2=801.5625
The principal on a savings account with 1.6% interest rate that has earned $25.65 over 2 years will be 801.56 dollars.
What is simple interest?Simple interest is a method of calculating the interest charge.
Simple interest can be calculated as the product of principal amount, rate and time peroid.
Simple Interest = (Principal × Rate × Time) / 100
The principal on a savings account with 1.6% interest rate that has earned $25.65 over 2 years.
Simple Interest = (Principal × Rate × Time) / 100
25.65 × 100/(1.6 × 2 )
= 801.5625
Therefore, the principal on a savings account with 1.6% interest rate that has earned $25.65 over 2 years will be 801.56 dollars.
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if the endpoints of ST are S (1,4) and T (5,2) then the midpoint is in Quadrant IV?
It is false that the midpoint is in quadrant IV
How to determine the midpoint location?The endpoints are given as:
S (1,4) and T (5,2
The midpoint is
(x, y) = 0.5 *(x1 + x2, y1 + y2)
So, we have:
(x, y) = 0.5 *(1 + 5, 4 + 2)
Evaluate the expression
(x, y) = (3, 3)
The point (3, 3) is located in the first quadrant
Hence, it is false that the midpoint is in quadrant IV
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find the work done by a person pushing a 40 pound box up an incline that is 30 degrees above the horizontal and 100 feet long (ignore friction forces etc.- also remember Work is the inner product of Force and direction vectors. Furthermore remember gravity is a force acting in the downward direction)
The work done in pushing the box is 64000 lb-ft²/s²
How to calculate the work done by the person?Since person pushing a 40 pound box up an incline that is 30 degrees above the horizontal and 100 feet long, the work done, W is
W = mgh where
m = mass of box = 40 lb, g = acceleration due to gravity = 32 ft/s² and h = height of incline = LsinФ where L = length of incline = 100 ft and Ф = angle of incline = 30°So, W = mgh
W = mgLsinФ
So, substituting the values of the variables into the equation, we have
W = mgLsinФ
W = 40 lb × 32 ft/s² × 100 ftsin30°
W = 1280 lb-ft/s² × 100 ft × 0.5
W = 1280 lb-ft/s² × 50 ft
W = 64000 lb-ft²/s²
So, the work done in pushing the box is 64000 lb-ft²/s²
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Adam's favorite online retail store is having a sale: jeans are $17 each and sweaters are $9 each, sales tax included. If Adam purchases at least $75 worth of jeans and sweaters, he will receive free shipping and handling. Let x represent the number of jeans purchased and let y represent the number of sweaters purchased. Which of the following inequalities represents the number of jeans and sweaters Adam must purchase in order to receive free shipping and handling?
The inequality which represents the number of jeans and sweater which he must purchase is; $17x + $9y >= $75.
Which inequality represents his purchase to receive free shipping?It follows from the task content that, to receive free shipping, $75 or more must be spent on the pieces of clothing to receive free shipping.
On this note, it follows that the required inequality is; $17x + $9y >= $75.
This follows from the fact that jeans are $17 each and sweaters are $9 each.
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PLEASE HELP!
Which linear inequality is represented by the graph?
Oy< 2/3x + 3
Oy> 3/2x+3
Oy> 2/3x + 3
Oy< 3/2x+3
Answer:
y > 2/3x + 3
Step-by-step explanation:
It is first option because > because shaded above the line and 2/3x is rise/run so 2/3.
+3 is because y-intercept is 3
The system of linear inequalities represented by the graph is the option;
y ≥ (1/3)·x + 3 and 3·x - y > 2
What is inequality?An inequality is a relation which makes a non-equal comparison between two numbers or mathematical expressions.
here, we have,
The system of linear inequalities are given by the in the question, that
describes the inequalities.
The points on the given graph are;
(3, 4), and (-3, 2)
The slope is; (2 - 4)÷((-3) - 3) = 1/3
The equation is;
y - 4 = (1/3)·(x - 3)
y = (1/3)·x - 1 + 4 = (1/3)·x + 3
Therefore;
The graph is y ≥ (1/3)·x + 3
Point on the second graph are;
(0, -2) and (2, 4)
The slope is; (4 - (-2)) ÷ (2 - 0) = 3
The equation is; y - (-2) = 3·(x - 0)
y = 3·x - 2
The inequality is; y < 3·x -2
Which gives;
2 < 3·x - y
Therefore;
3·x - y > 2
The correct option is the first option;
y ≥ (1/3)·x + 3 and 3·x - y > 2
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D=a/a+12*M. The adult weighs 75 kg. Calculate the adults weight in kilograms to pounds. Round final answer 2 decimal places
An adult with a weight of 75 kilograms have an equivalent weight of 165.60 pounds.
How to convert kilograms to pounds
Herein we have an application of unit conversions between weight units, from kilograms to pounds. Unit conversions follow this direct proportional formula:
y = k · x
Where:
x - Weight in kilograms
y - Weight in pounds
k - Conversion ratio
If we know that x = 75 kg and k = 2.208 lb/kg, then the weight of the adult in pounds is:
y = (2.208 lb/kg) · (75 kg)
y = 165.6 lb
An adult with a weight of 75 kilograms have an equivalent weight of 165.60 pounds.
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How many times can 0.1 fit into 100?
Answer:
1000 times
Step-by-step explanation:
To find out how many times 0.1 can fit into 100, we can just divide 100 by 0.1.
But, we first find out how many times can 1 fit into 100.
No. of times 1 fit into 100 = 100 / 1 = 100 times
Now we know 1 is 10 times of 0.1, so we multiply the above by 10,
so 100 * 10 = 1000 times.
Therefore 0.1 can fit into 100 a 1000 times.
Answer:
1000
Step-by-step explanation:
100 divide by 0.1 the answer is 1000
Select which form to use when you know the slope of the line and one of the points on the line. a. horizontal line c. slope-intercept form b. vertical line d. point-slope form Please select the best answer from the choices provided
The form which should be used when you know the slope of a line and one of the points on the line is: d. point-slope form.
What is the point-slope form?The point-slope form can be defined as an equation which is used when the slope of a line and one of the points on this line is known.
Mathematically, the point-slope form of a line is given by:
y - y₁ = m(x - x₁)
Where:
m is the slope.x and y are the points.In conclusion, you should use the point-slope form when you know the slope of a line and one of the points on the line is given.
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Answer:
b
Step-by-step explanation:
Which expression is equivalent to 7sqrtx^2/5sqrty^3? Assume y does not equal 0
Answer:
Option A) [tex]\bf{ x^{\frac{2}{7}}*y^{-\frac{3}{5}}}[/tex]
Step-by-step explanation:
we have
[tex]\sf{\dfrac{\sqrt[7]{x^{2}}}{\sqrt[5]{y^{3}}}}[/tex]
we know that
[tex]\sf{\sqrt[7]{x^{2}}=x^{\frac{2}{7}}}[/tex]
[tex]\sf{\sqrt[5]{y^{3}}=y^{\frac{3}{5}}}[/tex]
substitute in the expression
[tex]\sf{\dfrac{x^{\frac{2}{7}}}{y^{\frac{3}{5}}}=x^{\frac{2}{7}}*y^{-\frac{3}{5}}}[/tex]
The sum of three numbers is 14. The sum of twice the first number, 4 times the second number, and 5 times the third number is 56. The difference between 4 times the first number and the second number is 14. Find the three numbers.
Answer: 4, 2, 8
Step-by-step explanation:
4 + 2 + 8 = 14
14 = 14
2(4) + 4(2) + 5(8) = 56
8 + 8 + 40 = 56
56 =56
| 4(4) - 2 | = 14
|16-2| = 14
14 = 14
Clear my choice
Wind Song is paid $14.70 per hour, with overtime pay of time-and-a-half for Saturday work and double time for Sunday. Calculate her
gross pay if she worked 33 hours during the week (Monday through Friday) and 10 hours Sunday. (Round your answer to the nearest
cent)
a. $879.10
b. $532.21
c. $632.21
d. $779.10
Using proportions, her gross pay is given as follows:
d. $779.10.
What is a proportion?A proportion is a fraction of a total amount, and the measures are related using a rule of three.
Her gross pay is divided as follows:
$14.70 for 33 hours.2 x $14.70 for 10 hours.Hence the total pay is:
33 x 14.70 + 2 x 10 x 14.70 = $779.10.
Which means that option d is correct.
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What is the perimeter of A ABC?
Round each step to the nearest tenth.
Enter your answer in the box.
Answer: 11.4
Step-by-step explanation:
Using the distance formula,
[tex]AC=\sqrt{(-3-1)^2 + (-1-2)^2}}=5\\\\AB=\sqrt{(-3-0)^2 +(-1-3)^2}=5\\\\BC=\sqrt{(1-0)^2 + (2-3)^2}=\sqrt{2} \approx 1.4\\\\\implies P \approx 5+5+1.4=\boxed{11.4}[/tex]
A TV studio has brought in 6 boy kittens and 8 girl kittens for a cat food commercial.
The director is going to choose 7 of these kittens at random to be in the commercial.
What is the probability that the director chooses 4 boy kittens and 3 girl kittens? Round your answer to three decimal places.
The required probability is given by 0.012 for the director chooses 4 boy kittens and 3 girl kittens
A TV studio has brought in 6 boy kittens and 8 girl kittens for a cat food commercial.
Probability, can be define as the ratio of favorable events to the n number of total events
The director is going to choose 7 of these kittens at random to be in the commercial. the director chooses 4 boy kittens and 3 girl kittens.
Here, probability of to choose 7 of these kittens at random
= c(14,7)
probability to chooses 4 boy kittens and 3 girl kittens
= c(6,4) x c(8,3)
Required probability = [tex]\frac{c(6, 4) * c(8, 3)}{c(14, 7)}[/tex] = 0.012
Thus, The required required probability is given by 0.012 for the director chooses 4 boy kittens and 3 girl kittens.
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Is full biology in 9th grade?
Answer:
I think so, but maybe if the schools are different they change.
Elizabeth company has 10,000 units of their new product in warehouse. They sold 10,000 in pre-order that will need to be shipped immediately. They are producing 1,000 units per week and they are receiving 700 order per week. How long will it take to fill the warehouse to maximum capacity at the current production rate?
Answer:
m = 300w OR w = m/300
Step-by-step explanation:
They start with 10k, but that's immediately sold, so they're back at a flat 0. Every week they gain 1000 but lose 700 for a net profit of positive 300.
Therefore, the maximum capacity would be 300 multiplied by the number of weeks. If we know the maximum, then the answer would be m (maximum) divided by 300.
what is the domain of f(x)-(1/4)^x?
A. y>0
B. x<0
C. x>0
D. All real numbers
Given sin a=−2/5 and cos b=1/3 with a and b both in the interval (3π/2,2π), find sin(a+b)
Answer:
[tex]-\frac{8\sqrt{2}+2}{15}.[/tex]
Step-by-step explanation:
1) sin(a+b)=sin(a)cos(b)+sin(b)cos(a);
2) if sin(a)=-0.4, then cos(a)=0.8; if cos(b)=1/3, then sin(b)=-√8/3;
3) finally, sin(a+b)=-0.4*1/3-√8/3*0.8=
[tex]=-\frac{8\sqrt{2}+2}{15}.[/tex]
What is the range of the function in the graph?
y
70
60
50
40
30
20
10
012
1 2 3 4 5 6 7 X
Answer:
[tex]1234567x = [/tex]
Which formula do i use for this? it seems i used the wrong one.
The total amount of money which the Stewart family would have to pay into the annuity each quarter is $242.12.
How to calculate the payment?Mathematically, annuity can be calculated by using this formula:
[tex]A = P[\frac{(1+\frac{r}{n} )^{nt} - 1)}{\frac{r}{n} }][/tex]
Given the following data:
Time, t = 11 years.Number of times compounded (quarterly), n = 4.Present value, A = $13,000.Interest rate, r = 3.6% = 0.036.Substituting the given parameters into the formula, we have;
[tex]13000 = P[\frac{(1+\frac{0.036}{4} )^{4 \times 11} - 1)}{\frac{0.036}{4} }]\\\\13000 = P[\frac{(1+0.009 )^{44} - 1)}{0.009 }]\\\\13000 = P[\frac{(1.009 )^{44} - 1)}{0.009 }]\\\\13000 = P[\frac{1.48323960867 - 1}{0.009 }]\\\\13000 = P[\frac{0.48323960867 }{0.009 }]\\\\13000 = 53.6932898522P[/tex]
P = 13000/53.6932898522
P = $242.12.
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Complete Question:
The Stewart family wants to save money to travel the world. They plan to invest in an ordinary annuity that earns 3.6% interest, compounded quarterly. Payments will be made at the end of each quarter. How much money do they need to pay into the annuity each quarter for the annuity to have a total value of $13,000 after 11 years?
what is a turning point on a quadratic graph?
Answer:
A turning point is the highest or lowest point on a quadratic graph.
Step-by-step explanation:
A quadratic graph looks something like the graph below.
The equation of a quadratic graph would normally look like
+/- ax^2 + bx + c
An example might be -16x^2 + 5x + 4
Note the negative symbol in front of the 16. The negative means that the graph will be facing downwards, or that the turning point is the highest point. A positive graph will mean that the graph is facing upwards, or that the turning point is the lowest point.
Essentially, it is the location where a graph has its lowest or highest point and where the y-values (can include x-values in horizontal quadratics) "turn" to the direction they originated.
m% of n write a expression
The percentage of a given number in another implies the fraction of the given number to that other number with respect to 100%. Thus the required expression is: [tex]\frac{m}{100}[/tex] x n
When a given number is written in percentage, it implies that the fraction of the number to the total number in relation to 100%. For example, to determine the percentage of a number r in s, -we have:
[tex]\frac{r}{s}[/tex] x 100%
Therefore in the given question, the required expression is;
m% = [tex]\frac{m}{100}[/tex]
So that;
m% of n can be expressed as;
[tex]\frac{m}{100}[/tex] x n
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A local school is considering requiring students to pass a state administered math reasoning and reading comprehension test in order to graduate high school. The local school board believes that passing the state math and reading tests will be a predictor of a student’s success in college.
I do not agree that passing the state math and reading tests will be a predictor of a student's success in college.
What are the factors that determine a student's success in college?The factors that determine a student's success in college include the following:
Students' attitudes to learningTeachers' attitudes to sharing knowledgeTeaching methods for imparting knowledgeClassroom learning environmentStudent's belief in gender stereotypesParental factors.Question Completion:Do you agree with the board? Mention the factors that determine a student's success in college.
Thus, it is not necessarily true that passing the state math and reading tests will be a predictor of a student's success in college.
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