Answer:
Step-by-step explanation:
9.65-9.56=0.09
0.09/9.56=0.009414
0.009414*100=0.94%
9.56 increased by 0.94% to 9.65
At a community college with five hundred students, 150 are English majors and 350 are math majors. If a simple random sample of fifty students was selected to represent the various majors proportionately and twenty English majors were chosen, how does this compare to how many English majors would have been chosen if the sample was created using stratified proportionate sampling?
A.)There should be fewer English majors in the stratified proportionate sample.
B.)There should be more English majors in the stratified proportionate sample.
C.)There will be the same number of English majors in the stratified proportionate sample.
D.)There is no way to tell how many English majors will be in the stratified proportionate sample.
the answer is "a" because If it was proportional out of 50 there would be 15 english majors.
Using stratified proportionate sampling out of 50 students, 15 English majors should have been chosen, fewer than the 20 selected in the simple random sample.
Explanation:To answer the question, we need to determine how many English majors would have been chosen if the sample was created using stratified proportionate sampling. In stratified proportionate sampling, the number of students selected from each group is proportional to their representation in the overall population.
Since there are 150 English majors out of 500 students, English majors make up 30% of the student body. When creating a sample of 50 students, 30% of this sample size should be English majors, which would be:
30% of 50 students = 0.3 x 50 = 15 English majors.
Since the simple random sample selected 20 English majors, and a stratified proportionate sample would have included only 15, the answer is:
A.) There should be fewer English majors in the stratified proportionate sample.
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1. Rank the following from largest mass to smallest mass.
Gravity on the moon = 1.6 m/s^2 Gravity on Mars = 3.7 m/s^2
a) 1 kg object on earth
b) 2.75 lbm object on the moon
c) 1.25 lbf object on the moon
d) 15 N object on earth
e) 15 N object on Mars
The answer is C.) i think
Answer:
e) 15 N object on Mars
d) 15 N object on earth
b) 2.75 lbm object on the moon
a) 1 kg object on earth
c) 1.25 lbf object on the moon
Step-by-step explanation:
Mass is the amount of mass that a certain object has, it differs from its weight because the weight depends of the gravity or the force that is been applied to the object towards the planet.
To obtain the mass a 15N object on mars you have to divide the 15N by the gravity of mars this would be like this:
Mass:[tex]\frac{15}{3.7}[/tex]= 4.05kg
To obtain the mass of a 15 N objecto on the earth you divide 15N by 9.8 [tex]\frac{m}{s^{2} }[/tex] which is the gravity on earth.
Mass:[tex]\frac{15}{9.8}[/tex]= 1.53 kg
To calculate the mass of a 2.75 lbm object on the moon you just have to convert it to kg.
Mass in kg: 2.75*.453= 1.24 kg
Then the 1 kg mass object on the earth.
And last the 1.25 lbf object on the moon you just convert it to kilograms.
Mass in kg: 1.25*.138=.172kg
Please help... :'( I NEED THIS TO PASS MY GRADE
Which expression is equivalent to -12(3x-3/4)?
A. -36x-8
B. -36x+8
C. -36x-9
D. -36x+9
Answer:
D. -36x+9
Step-by-step explanation:
−12(3x−
3/4)
=(−12)(3x+ −3/
4)
=(−12)(3x)+(−12)(
−3/4)
=−36x+9
Answer:
D. -36x + 9
Step-by-step explanation:
[tex]-12[3x - \frac{3}{4}] \\ -36x + 9[/tex]
I am joyous to assist you anytime.
Which unit is commonly used in both the metric and u.s system of units
Answer:
Step-by-step explanation:
Surely the units of time: minut, hour, second.
Answer:
The unit of time - seconds
Step-by-step explanation:
The metric system uses units such as meter, liter, and gram to measure length, liquid volume, and mass.
Whereas in the US system of units, units like feet, quarts, and ounces to measure these.
But 'seconds' the base unit of time, is the unit that is used in both the system of units.
ANSWER PLEASE
Karen takes classes at both Westside Community College and Pinewood Community College. At Westside, class fees are $98 per credit hour, and at Pinewood, class fees are $115 per credit hour. Karen is taking a combined total of 16 credit hours at the two schools. Suppose that she is taking w credit hours at Westside. Write an expression for the combined total dollar amount she paid for her class fees.
Answer:
y = 98w + 115(16 - w)
Step-by-step explanation:
Let y = total amount paid
Let w = credit hours in Westside
Let 98w = Westside Fee
Let 115(16-w) = Pinewood
Then we get:
y = 98w + 115(16-w)
Now how did get 16 - w?
We got that by analyzing the problem. We have a total of 16 credit hours and w represents the number of hours at Westside. So we take the total of 16 hours and deduct it to the number of hours that Karen took in Westside.
Measured in meters, the wavelength of red light is about 8*10^-7, and the wavelength of violet light is 4*10^-7. The wavelength of red light is how many times longer than the wavelength of violet light?
Answer: The wavelength of red light is 2 times longer than the wavelength of violet light.
Step-by-step explanation:
Let be "x" the number of times the wavelength of red ligth is longer than the wavelength of violet light.
Knowing that the wavelength (measured in meters) of red light is about [tex]8*10^{-7}[/tex] and the wavelength (measured in meters) of violet light is [tex]4*10^{-7}[/tex], you have to:
Divide the wavelength of red light (measured in meters) by the wavelength of violet light (measured in meters).
Then:
[tex]x=\frac{wavelength\ of\ red\ light}{wavelength\ of\ violet\ light}\\\\x=\frac{8*10^{-7}}{4*10^{-7}}[/tex]
Remember the Quotiend of powers property:
[tex]\frac{b^m}{b^n}=b^{(m-n)}[/tex]
Then:
[tex]x=2[/tex]
The wavelength of red light is 2 times longer than the wavelength of violet light.
Answer:
2 times as long
Step-by-step explanation:
i did this on i-ready and i got it wright ur welcome plis give me brainlyest
*spelled that wrong*
The length of the rectangle is 4ft greater than the width. If each dimesion is increased by 3,the new area will be 33 square feet long. Find the dimensions of the original rectangle
Answer:
Width is 2 feet and the length is 6 feet.
Step-by-step explanation:
The area of a rectangle is A = l*w. Here the length is 4 feet more than the width or 4 + w and the width is w. So the area is A = w(4+w) = 4w + w²
If the dimensions are changed then the expressions will change. The width is increased by 3 feet. This means the width w becomes w + 3. The length is increased by 3 feet. This means the length becomes 4 + w + 3 = 7 + w. So the area of the new triangle is A = (w+3)(7+w) = w² + 10w + 21.
The new area is 33 feet longer. We can add 33 to the original area then set them equal to each other and solve for w.
w² + 10w + 21 = 33+4w + w² Subtract w² from both sides.
10w + 21 = 33+4w Subtract 4w from both sides.
6w + 21 = 33 Subtract 21 from both sides.
6w = 12 Divide by 6.
w = 2 feet
The original width w is 2 feet. This means the original length which was 4 + w = 4 + 2 = 6 feet.
To solve the problem, set up two equations based on the given information, substituting the first equation into the second to solve for 'w' (width) and 'l' (length) - the original dimensions of the rectangle.
Explanation:To solve this problem, we'll first set up two equations based on the information provided in the question. Let's use 'w' to represent the width of the original rectangle and 'l' to represent its length. According to the problem, we know that:
The length of the rectangle is 4ft greater than its width. So, l = w + 4. If each dimension is increased by 3, the new area (length times width) is 33 square feet. So, (w+3) * (l+3) = 33.
Substitute the first equation (l = w + 4) into the second to find w and then l. This is the system of equations needed to find the original dimensions of the rectangle.
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At the swim club, what is the ratio of men to all members? 400 men, 300 women, 100 children
Answer: 400 men:800 members
Step-by-step explanation:
There is 400 mean so you would put 400 men first then you add 400+300+100=800 and that is all the members so it would be 400 men:800 member
Answer:400 to 800 or 1 to 2
Step-by-step explanation: There are 400 men in total so you know that is the number of men for the ration and then you count everyone for the people in this ratio. Remember... men count as part of everyone. After adding the men women and children you get 800 so it comes to 400:800 or simplified 1:2
1. Preliminaries Remember the setup: We (the RAF in World War II) want to know the number of warplanes fielded by the Germans. That number is N. The warplanes have serial numbers from 1 to N, so N is also equal to the largest serial number on any of the warplanes. We only see a small number of serial numbers (assumed to be a random sample with replacement from among all the serial numbers), so we have to use estimation. Question 1.1 Is N a population parameter or a statistic? If we compute a number using our random sample that's an estimate of N, is that a population parameter or a statistic?
Answer:
N is a population parameter; the computation using an estimate of N is a statistic.
Step-by-step explanation:
A parameter is a measure of a population. The number of warplanes fielded total is N; this makes it the population. Thus N is a parameter.
A statistics is a measure of a sample. The number computed using an estimate of N would be based on a sample, since it is an estimate of N; this makes it a statistic.
A team is excavating an archeological site. The original plan was to excavate a rectangular area 35 ft long
by 20 ft wide. Instead, the team decided to excavate a similar rectangle that is 50 ft wide. Find the length
and the area of the new rectangle.
CAN SOMEONE HELP??
Answer:
Part 1) The length of the new rectangle is [tex]87.5\ ft[/tex]
Part 2) The area of the new rectangle is [tex]4,375\ ft^{2}[/tex]
Step-by-step explanation:
we know that
If two rectangles are similar, then the ratio of its corresponding sides is proportional
step 1
Find the length of the new rectangle
Let
L-----> the length of the new rectangle
[tex]\frac{50}{20}=\frac{L}{35}\\ \\ L=50*35/20\\ \\L=87.5\ ft[/tex]
step 2
Find the area of the new rectangle
we know that
The area of the rectangle is
[tex]A=LW[/tex]
we have
[tex]L=87.5\ ft[/tex]
[tex]W=50\ ft[/tex]
substitute
[tex]A=(87.5)(50)=4,375\ ft^{2}[/tex]
Explain how to determine if the number is a solution to the equation. 56 = 8 + 4n for n = 6
To determine if the number is a solution to the equation, we have to substitute n with the number given.
56= 8 + 4(6)
56= 8 + 24
56= 32
So no, the number is not a solution to the equation.
The number is a solution of a linear equation if both sides of the equation namely RHS and LHS are equivalent.
What is the solution to a linear equation?The solution of a linear equation is defined as the points, in which the lines represent the intersection of two linear equations. In other words, the solution set of the system of linear equations is the set of all possible values to the variables that satisfies the given linear equation.
Given here, the equation as 56 = 8 + 4n and to verify for n=6
Here, LHS =56 and RHS when n=6 is 8+4×6=32
Thus LHS≠RHS
Hence n=6 is not a solution to the equation.
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SAMANATHA HAS 3 MORE THAN 4 TIMES MANY BOOKS AS DEENNA DEANA HAS D BOOKS HOW MANY BOOKS DOES SAMANTHA HAVE
the correct answer would be 12 look in the sentence you've created that says times so 4 * 3 with equal to 12
Someone help please!!???
Answer:
c = 19,683, e = 3, d = 4Step-by-step explanation:
[tex](rs)^{-1}(3s)^5(3r)^4\qquad\text{use}\ (ab)^n=a^nb^n\\\\r^{-1}s^{-1}(3^5)s^5(3^4)r^4=(3^5)(3^4)(r^{-1}r^4)(s^{-1}s^5)\qquad\text{use}\ a^na^m=a^{n+m}\\\\=3^{5+4}r^{-1+4}s^{-1+5}=3^9r^3s^4=19,683r^3s^4[/tex]
Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative. Remember to use absolute values where appropriate.) f(x) = 3 5 − 9 x , x > 0
Answer:
[tex]35x - \frac{9x^2}{2} + C[/tex]
Step-by-step explanation:
The antiderivative of the function is the same as the integral. To find the integral or antiderivative, reverse the process of differentiation method. Currently the function has degree 1. Through integration we increase the degree of each term by 1 and divide by the degree.
Thus 35 - 9x becomes [tex]35x - \frac{9x^2}{2} + C[/tex]. We add a constant C for any possible constant that was eliminated during differentiation.
The local electronic store sells items for 75% of what they pay them for. Tyrone is stocking television for $450 each. What is the markup amount?
Final answer:
To find the markup amount for the television, we can calculate 25% of the cost price. The markup amount is $112.50.
Explanation:
To find the markup amount, we need to determine the difference between the selling price and the cost price. The store sells items for 75% of the cost price, which means they have a markup of 25%.
To find the markup amount for the television, we can calculate 25% of the cost price.
Markup amount = 25% x $450 = $112.50
8 inches of snow was predicted. 12 inches of snow fell. calculate the percent error
Answer:
33.333333333333%
Step-by-step explanation:
Percent error = V observed - V true
=8-12/12
=-33.333333333333%
=33.333333333333% error
Please help me out!.
Since PQRS is isosceles, the horizontal distance between PQ and RS is the same, i.e. it's [tex]a[tex].
Moreover, point C is horizontally aligned with point Q, which implies that they share the y coordinate.
So, point R has coordinates [tex](c-a,b)[/tex]
Graph for [tex]f(x) = \frac{(2x+3)(x-6)}{(x+2)(x-1)}[/tex]
Answer:
The graph is attached below
Step-by-step explanation:
The function has three asymptotes. Before we can graph the function, we can find them.
Vertical asymptotes in the values that make the denominator zero.
The denominator becomes zero in:
[tex]x = -2\\x = 1\\[/tex]
Then the vertical asymptotes are the lines
[tex]x = -2\\x = 1\\[/tex]
The horizontal asymptote is found using limits
[tex]\lim_{x\to \infty}\frac{(2x+3)(x-6)}{(x+2)(x-1)}[/tex]
Then:
[tex]\lim_{x\to \infty}\frac{(2x^2-12x +3x -18)}{x^2-x+2x-2}[/tex]
We divide the numerator and the denominator between the term of greatest exponent, which in this case is [tex]x ^ 2[/tex]
The terms of least exponent tend to 0
[tex]\lim_{x\to \infty}\frac{(2\frac{x^2}{x^2}-0 +0 -0)}{\frac{x^2}{x^2}-0+0-0}\\\\\lim_{x\to \infty}\frac{2}{1} = 2\\\\[/tex]
The function has a horizontal asymptote on y = 2 and has no oblique asymptote
The graph is attached below
The polynomial f(x) has zeros at x=6−3i, 6+3i, and −1.
Which graph could be the graph of f(x)?
Answer:
It is the second graph.
Step-by-step explanation:
One zero is x = -1 so the graph will be curved (as it has degree 3) and will pass through the x axis at x = -1 and only at -1 because the other 2 zeroes are complex numbers.
Select the domain and range of F. F = {(x, y ) | x + y = 10}. Domain: {10} Range: {10} Set F is not a function and does not contain a domain or range Domain: All Real Numbers Range: All Real Numbers
Answer:
Domain: All Real Numbers Range: All Real Numbers
Step-by-step explanation:
The function x + y = 10 is a linear function. Its graph is a line on the coordinate plane. As such the line extends both left and right and up and down without any restrictions. This means there are no limits on its domain or range. Both are all real numbers.
Solve the system of equations using the substitution method. Y = 7x – 16, y = 2(2x – 5) What is the solution? ( , )
Answer is ( 2, -2 ) so x=2 and y=-2
Answer:
(2,-2)
Step-by-step explanation:
This pair of linear equations may be solved simultaneously by using the elimination method. This will involve ensuring that the coefficient of one of the unknown variables is the same in both equations. It may be solved by substitution in that one of the variable is made the subject of the equation and the result is substituted into the second equation.
Given that Y = 7x – 16, y = 2(2x – 5)
Equating both equations
7x - 16 = 4x - 10
7x -4x = 16 - 10
3x = 6
x = 2
Substituting the value of x into Y = 7x – 16
y = 7(2) - 16
y = 14 - 16
y = -2
hence
(x,y) = (2,-2)
1. In the figure below, ABC ~ PQR.
in given figure, ABC is 4 cm and PQR is 6 cm
If the area of ABC is 40 cm2, what is the area of PQR? Show your work.
2. A science museum has a spherical model of the earth with a diameter of 8.5 m. What is the volume of the model? Use 3.14 for and round your answer to the nearest whole number. Show your work.
(4 points: 1-Work shown, 1-Calculations, 1-Area, 1-Units)
Answer:
1. The area of the triangle PQR is 40 cm^2.
2. 321.4 cubic cm
Step-by-step explanation:
1. We are given two triangles, ABC and PQR, which are similar to each other.
Given that area of the triangle ABC is [tex]40cm^2[/tex], we are to find the area of the triangle PQR.
For that, we can use the ratio method:
[tex] \frac { P Q R } { 4 0 } = \frac { 6 } { 4 } [/tex]
Area of triangle PQR = [tex] \frac { 6 \times 40 } { 4 } = 60cm^2 [/tex]
2. We are given the diameter of a spherical model to be 8.5 cm so its radius will be 4.25 cm.
Finding the volume of the spherical model as we know that the volume of a sphere is given by:
[tex]\frac{4}{3} \pi r^3[/tex]
Substituting the given value of radius in the formula to get:
Volume of spherical model = [tex]\frac{4}{3} \times 3.14 \times (4.25)^3[/tex] = 321.4 cubic cm
William bought a 0.5 -liter bottle of liquid plant food. He uses 40 milliliters each week? How much plant food does William need for 12 weeks? Is one bottle enough for 12 weeks ?
Answer:
He needs 0.48 liters of plant food.
Yes, one bottle is enough for 12 weeks.
Step-by-step explanation:
William uses 40 mililiters each week.
Let be [tex]x[/tex] the total amount of liquid plant food he needs for 12 weeks. It can be calculated by multiplying 12 by 0.40 mililiters. Then:
[tex]x=(12)(40mL)\\x=480mL[/tex]
Make the conversion from mililters to liters (Remember that 1 liter has 1,000 mililiters):
[tex](480mL)(\frac{1L}{1,000mL})=0.48L[/tex]
Then, he needs for 12 weeks:
[tex]x=0.48L[/tex]
As he bought a 0.5 -liter bottle of liquid plant food and he needs 0.48 liters for 12 weeks, you can conclude that one bottle is enough for 12 weeks.
William needs 480 mL of plant food for 12 weeks. One 0.5-liter bottle (500 mL) is enough for this duration.
William bought a 0.5-liter bottle of liquid plant food. He uses 40 milliliters (mL) each week. To find out how much plant food William will use in 12 weeks, we multiply the weekly usage by the number of weeks:
40 mL/week x 12 weeks = 480 mLSince 0.5 liters is equivalent to 500 milliliters, we determine that one bottle of 0.5 liters will be enough for 12 weeks because he needs 480 mL and the bottle contains 500 mL.
suppose A and B are dependent events.if P(A)=0.5 and P(B)=0.6
p(a∩b)?
A.0.5
B.0.6
C.0.3
D.0.1
Answer:
Step-by-step explanation:
the anwser is D hope this helps =D
Answer:
Option C.
Step-by-step explanation:
If A and B are independent events then theorem says
P(A∩B) = P(A) × P(B)
Since value of P(A) = 0.5 and P(B)= 0.6 has been given in the question.
Then P(A∩B) = 0.5×0.6
= 0.3
Therefore, option C. is the answer.
Use substitution to solve. 2x? = 5 + y 4y = -20 + 8x? Solve the first equation for y and substitute it into the second equation. The resulting equation is
Answer:
Infinite Solutions
Step-by-step explanation:
2x = 5 + y and 4y = -20 + 8x can be solved by substituting one equation into another to find the variables.
2x = 5 + y becomes y = 2x - 5. Substitute this expression into 4y = -20 + 8x.
4(2x - 5) = -20 + 8x
8x - 20 = -20 + 8x
8x - 8x - 20 = -20 + 8x - 8x
-20 = -20
This has infinite solutions since x eliminates and a true statement is left.
Answer:
infinite solutions.
Step-by-step explanation:
got it right on the assignment
Nancy's breakfast costed 2.99 and she hands a 5 dollar bill.How much change should she receive back
Answer:
$2.01
Step-by-step explanation:
Subtract 2.99 from 5.00
5.00-2.99 = 2.01
The change Nancy should receive back is $2.01
How to find out how much change should she receive back?To find the amount of money that Nancy will receive, we will have to subtract the breakfast cost from the amount of money that she handed .According to the problem,
Nancy's breakfast costed $2.99she hands a 5 dollar bill.Amount of money left = $(5 - 2.99) = $ 2.01
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70 POINTS!!!! HURRY PLEASEE!
A lab assistant tracked an object’s travel time in hours. However, the lab director wants the time tracked in minutes. customary system Help the lab assistant complete the table. How many minutes did the object travel after 2.5 hours? 100 120 150 180
Answer:
150 minutes
Step-by-step explanation:
Since your solving for minutes you need to change the 2.5 hours into minutes. There is 60 minutes in 1 hour. you take 60 and multiply it by 2.5 because you need to find the total minutes. When you multiply those teo you get 150 minutes. Please give me the brainliest answer.
:D Hoped this helped!!! Have a good day!! <3
Answer:
150 minutes
Step-by-step explanation:
1 hours = 60 minutes
We need to use the conversion factor with minutes on top
2.5 hours * 60 minutes
-------------
1 hour
Canceling hours
2.5 *60 minutes
150 minutes
help 23 points 2 questions
A)
The lawyer in 20 years earns 3,620,000
The mathematician in 40 years earns 3,160,000
Subtract to find the difference:
3,620,000 - 3,160,000 = 460,000
The answer is the first one.
B)
Interest would be a credit of 27.23, balance = 700 + 27.23 = 723.23
Transfer would be a debit of 176.02 balance = 723.23 - 176.02 = 547.21
Deposit would be a credit of 157.00 balance = 547.21 + 157.00 = 704.21
A check would be a debit of 47.13 balance = 704.21 - 47.13 = 657.08
Which of the following is equal to the expression below?
(8.320)(1)/(3)
A. 30
B. 8\root(3)(5)
C. 10\root(3)(5)
D. 40
The expression (8.320)(1)/(3) simplifies to approximately 2.7733.
The expression (8.320)(1)/(3) can be simplified as:
Multiply 8.320 by 1 to get 8.320.Divide the result by 3 to get approximately 2.7733.Therefore, the answer is 2.7733, which is not among the provided options.
What is the length of the missing side of the triangle in simplest radical form? the figure is not drawn to scale.
Answer:
option (c)
4√34
Step-by-step explanation:
Given in the question is a right angle triangle
height of triangle = 20 cm
base of triangle = 12 cm
To find the length of missing side of the triangle we will use pythagorus theorem
hypotenuse² = height² + base²hypotenuse² = 20² + 12²
hypotenuse² = 400 + 144
hypotenuse² = 544
take square root on both sides
√hypotenuse² = √544
hypotenuse = 4√34 cm
Hence, the length of missing side of the triangle is4√34 cm