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Posts by christine

Total # Posts: 556

Math Finite
Experiment: roll a fair die and flip a fair coin. What is the probability is that you roll a 3 and flip a head?

physics
a star has a mass of 2.0 10 30kg and a radius of 3.4*106m. what is its average density in kg/m3

math
using two fair dice, what is the probability of rolling a sum that exceeds 4?

math
Write expression for the other five trigonometric ratios for each acute angle: A) cscƒÆ=a/b B) secƒÀ= x+1/x-1, x‚1

accounting
You notice that your accounts receivable days have doubled in the first six months of this year. Do you give the A/R Director a bonus or put him/her on probation? Why? Explain fully what questions you would ask the Director about the A/R and why it has doubled.

physics
850N/(3r)^2= 850/9r^2=94.4 Newtons

physics
Take the weight and divide it by 9.

Math
8. If all 5 beads are red, only 1 bracelet can be formed. If 4 beads are red and 1 is blue, only 1 bracelet can be made. If 3 beads are red and 2 beads are blue, 2 different bracelets are possible: the blue beads together or separated by the red beads. The symmetry in this ...

Math
5. The only sequences that are both arithmetic and geometric are constant sequences, in which all the terms must be the same. For us to have a sum of 20, each term of the sequence must be 5. We can show this algebraically by solving the system of equations a + d = ar and a + ...

Math
25. The sum of a penny, a dime, and a quarter is 36 cents. The number 36 factors into 2²•3². To get an integral value in dollars, we must multiply by 5² so that the product ends in two zeroes. Any multiple of 25 will work, but 25 is the least of those values.

pysics
A river is one mile wide and the water flows at the rate 3 miles/hour. If you can paddle a canoe 5 miles/hour in still water, then how long will it take you to paddle across the river and back? How long would it take you to travel one mile upstream (measured along the bank) ...

science
What effect will the current governmental initiatives that focus on expanding health care coverage to more Americans have on health care costs and health care services in the United States? What would you add or subtract from the recently approved healthcare bill?

Math
What equation do I use to find out what I need to get on my exam to pass my class. I have a 65.9% and the exam is 20% of my grade....if you need any additional information let me know..... also a passing grade is 59.5

chemistry
At a pressure of 1.7 atm a balloon has a volume of 4.98 L . If the pressure is decreased to 1.0 atm (at constant temperature) what is the new volume of the balloon?

Chemistry
Do I need to first figure out the PH? I believe that a= 3 and b=2.87 therefore it will require more naoh to titrate the acetic acid. I am not sure i figured the ph of acetic acid correctly, or if i am on the correct path here...

Chemistry
Suppose you have two solutions to titrate with NaOH: (a) 10 ml of.1M HCL (b) 10 ml of .1M CH3COOH would you expect either of the solutions to require different volumes of NaOH in order to reach an end point? Explain

MEANING
What is the meaning for vagaries.also give me a sentence for it.

meaning
what does the word vagaries mean.Also put a sentence for it

calculus
An annuity has a differential equation of y'=4500+.035y, and an initial condition of y(0)=1000. Describe what is going on.

chemistry
6.022 x 1023 atoms. Thank you Dr Bob222

chemistry
How many atoms are in 95.96 g of molybdenum (Mo)

Physics!
The following four forces act on 4.00 kg object: F1 = 300 N east F2 = 700 N north F3 = 500 N west F4 = 600 N south What is the acceleration of the object?

Physics
A 1000-kg car is driving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest in a distance of 140 m. What is the constant force applied to the car to bring it to rest?

math
What Is the ture math relationship using the numbers 1,1,1,10,7,8 ,5 to make it 1 or equal to one in fractions?

Pre-Algebra
suppose the projector is moved to a point 9 ft from the screen. what size will the picture be (width, height, and area) please help

Home Insurance
its D

Math/Calculus
After 5 days, a particular radioactive substance decays to 37% of its original amount. Find the half life of this substance. Is this right? Th= ln 2/ln(1/.37) x 5 days

Accounting
I have added Below my balance sheet and income statement now the statement of owners equity is the beginning capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawals 5,000 equals 44,750 which does not equal my assets. I cannot figure out what I am doing ...

Accounting
Sorry about that I have added Below are my balance sheet and income statement now the statment of owners equity is the beginig capital 28,2800 plus the net income 21,550 which is 49,750 less withdrawls 5,000 equals 44,750 which does not equal my assets. I cannot figure out ...

Accounting
Statement of Owner's Equity I've tried to get it to balnce with the amount of on my balance sheet of $54,500.00 but can not can you help Cash… …… ……… … … … ………$21,500 Accounts Receivable………17,...

help please :-)
Could be both a and B

help please :-)
its the supporting details

math
solve. (3k+4.2)+8.6 and (3s)x8

physics
Vi = 5m/s a = 1.666

Science economic
Cesium 138 has a half life equal to 32.2 minutes. how long will it take for 2/4 of this sample to decay

vocab
i need hel because i don't know how to use indignation in a sentence and it make sense!

math
2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all of your work. x...

math
Solve. Please show all of your work. Find the length and width of a rectangular lot with a perimeter of 108 meters if the length is 8 meters more than the width.

math
Solve 4x- 3(5x-8)=23-9(x+2) . Please show all of your work

math
Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c)

math
Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3|

math
Simplify. Please show all of your work. 12* 1/4 +2/-2^3

math
Write the slope-intercept equation for the line with the given slope that contains the given point m = 3/4 ; (0, 5)

math
Write a slope-intercept equation of the line whose graph is described Parallel to the graph of 3x + 2y = 5; y-intercept (0, −1)

math
Four-year -college tuition. The average tuition at a public four-year college was $3983 in 2001 and $5948 in 2005. Find the rate at which tuition was increasing.

math
Determine if(3/8-1 is a solution to 8x-7y=10. Please show all of your work

math
4. Translate to an equation: p $25 potted plants and s $20 shrubs total $300 Graph the equation and use the graph to determine three different combinations of potted plants and shrubs that total $300. Submit your graph through the dropbox.

Math
Find the x- and y-intercepts and graph the equation plotting the intercepts. Please show all of your work. Submit your graph to the Dropbox 2x-3y=9

math
(8/3-1) is a solution to 8x-7y=10 . Please show all of your work

algebra
Can you sketch the y=x+9 equation?

INFORMAL LOGIC phi:103
inadequate authority

maths
Starting from one oasis, a camel walks 25km in a direction 30 degrees south of west and then walks 30km toward the north to a second oasis. What distance separates the two oases?

english
What correction should be made to this sentence? Today's hikers prefer a shoe that is six inches high, is made of leather, and thick sturdy composition soles.

algebra 1
determine whether the graphs will be parallel,perpendicular, or neither...... y=2/3x-6 2x-4=3y

Science
What are the theoretical molar ratio values for Ag:Cu and Ag:AgNO3? Compare these values to the values you got in your experiment and compute a percent error for your work.

Math
If two number cubes are rolled, what is the probability of getting at least one even number?

MATH
In the equation 4*ABCDE= EDCBA each letter represents a different nonzero digit. Determines the sum A+B+C+D+E i don't know how to do this

Math
Given a+b+c+d=45 and a+2=b-2=2c=d/2 compute a+b+c-d

healthcare
What effect will the current governmental initiatives that focus on expanding health care coverage to more Americans have on health care costs and health care services in the United States? What would you add or subtract from the recently approved healthcare bill?

government
Younger Citizens

precalc
dont know how to find the derivitive

precalc
find an equation of the tangent line to the parabola at the given point..show work y=(-2)x^2 (-1,-2)

physics
Why does a gas become hotter when compressed by a piston in a cylinder?

calculus
can you please help me solve this problem if dy/dx=ycosx and y=3 when x=0, then y=

calculus
if dy/dt=-3y and if y=1 when t=0, what is the value of t for which y=1/3?

calculus
is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^2-1

physics
1.) A small sphere of charge 2.4 μC experience a force of 0.36 N when a second sphere of unknown charge is placed 5.5 cm from it. What is the charge of the second sphere? 2.) Two identically charged sphere placed 12 cm apart have an electric force of0.28 N between them. ...

precalc
Find the vector v with the given magnitude and the same direction as u. ||v||=7, u=3i+4j

reading
In 1984 by George Orwell, what do the 3 slogans (war is peace, ignorance is strength, freedom is slavery) mean? I would like to know what EACH suggests about the society. And how is the society able to get people to accept them as logical. I was thinking that they chose ...

PHYSICS
A 70 kg student traveling in a car with a constant velocity has a kinetic energy of 1.4 104 J. What is the speedometer reading of the car in km/h?

Maths - Calculus
Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0<t< pie)

Maths - Calculus
Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0<t< pie)

Physics
Hey, I thought about it a little more and I have your answer here. B = mu(naught) * I / (2pi * r) You can solve for I in that equation. I hope it looks familiar. mu(naught) = vacuum permeability I = current r = radius of wire

Physics
I won't be able to answer exactly, but we know that the net force on the wire would be zero. So it means that Force(gravity) = Force(magnetic)

English
What is a characteristic to describe a person who always follows a schedule? What is a characteristic to describe someone who always follows the law?

English
What is a characteristic to describe a person who always follows a schedule?What is a characteristic to describe someone who always follows the law?

geometry
I have a perimeter of 15. I am not a square . Each of my sides is 3 units long. What shape am i?

chemistry
how long will it take to decompose 38% of A at 25 degrees celsius?

Physics
The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and P?

Physics
Two objects of equal mass m are separated by a distance r. Which expression gives the gravitational potential at the point P mid way between the two objects? The answer shows as -4Gm/r, but I can't see where this comes from.

Physics
A block weighing 6.8 N requires a force of 2.5 N to push it along at constant velocity. What is the coefficient of friction for the surface? A weight W is now placed on the block and 4.6 N is needed to push them both at constant velocity. What is the weight W of

chem
When an electric discharge is passed through boron trichloride a new compound is formed. what is its simplest formula if on analysis it is shown to contain .0878 g of chlorine and .0131 g of boron?

chem
a 6.54 g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. this mixture then reacts with barium chloride to for 3.50 g of silver chloride. calculate the percent by mass of silver nitrate in the first mixture

physics
9 m/s2

physics
please, help I don't know how to go about it

chemistry
What would happen if 50 grams of carbon fully reacted to oxygen?

Chemistry
how do you do this problem?!

1st grade
Will you drive past my house and pick me up?

Stats
A car insurance company has determined that 7% of all drivers were involved in a car accident last year. The company randomly selects 200 drivers. Compute the mean and standard devistion of the random variable, x, the number of drivers involved in accidents last year.

physics
S=u^2/2µs(g) S=(20.1168m/s)^2/2*.602*9.8 S=34.298m

physics
45 mi/h = 20.1168 m/s ma= .100n a = .100(g) solving for time v=vo + at 20.1168m/s=0+.98(t) t=20.527s solving for distance d=do+vot+at^2/2 d= 0+0+.98(20.527s)^2/2 d= 206.469m

chemistry
Cu + 2AgNO3-->Cu(NO3)2+ 2Ag 3.50/2 <--3.50

English---meaning??
"Submit a myth, or story, whose origins stem from your specific culture." what does specific culture mean??? For that requirement, what do I have to do???

Math 8th grade algerbra
How is the ratio of the volumes related to the ratio of corresponding dimensions?

trig
Find the values of the trigonmeric functions of t from the given information cos t = -4/5 terminal point of t is in quadrant III

chem--please help me check my answer!!
write an ionic and net ionic equation for the following reaction between Fe3+ and NH4OH. Please check my answer!! Thank you. My answer is: ionic: Fe3+(aq) + NH4OH--> Fe(OH)3 + NH4+ net ionic: Fe3+ +OH- -->Fe(OH)3

chemistry
Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C. i keep coming up withthe wrong ...

Chemistry
How do you work this one problem? Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C.

CHEMISTRY
really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A ...

chemistry
I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A ...

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