Sunday
November 23, 2014

Posts by Karen


Total # Posts: 866

algebra
use the distributive property.... multiply the -x by 6x and get -6x^2 minus the -x times the 7 to get -7x. then multiply everything by a -1 to get rid of the negative signs.
June 6, 2014

probability
got it thank you very much
June 6, 2014

probability
Two questions: 1. Assume a building has two independent security alarm systems. The first system works for 80% of the time and the second works 70% of the time. What percentage of time is the building protected by at least one security alarm system? Please explain. 2. There ...
June 6, 2014

Math
no problem! hope this helps for a better understanding
June 6, 2014

Math
when you are multiplying, and the bases (the 8 and 2.6) are the same, you can just add the exponents. so...8^19 and 2.6^24
June 6, 2014

Math
red=20/50 or .4 blue=10/50 or .2 green= 9/50 or .18 yellow=11/50.22 the results for each color over the total number of spins is the probability. to change it to a decimal divide the top number by the bottom number ex: 20 divided by 50.
June 6, 2014

algebra
You are using the distributive property here. the -3m is being multiplied by the m and then multiplied by the 8.
June 6, 2014

math question
the probability of selecting a yellow is 4/20 because there were four yellow out of 20 draws. However, to get the probability of NOT selecting a yellow, it is all the other draws that total 16 out of 20. so 16/20 which reduces to 4/5 which is .8 probability of selecting a ...
June 6, 2014

Math
all the terms that are x^2 need to be added together "combined". all the x's need to be combined and all the constants (just the number by itself) need to be added. This is called combining like terms. x^2 can only be added to other x^2. and x's can only be ...
June 6, 2014

maths
I wouldn't include 0 because you said from 1-100 not 0-100.
June 6, 2014

algebra
multiply only the numbers together and then having two x's is represented as x^2.
June 6, 2014

math
factorize :x2-2X+xy-2y
May 27, 2014

ACCOUNTING HELP
At the end of the current year, $19,900 of fees have been earned but not billed to clients. a. What is the adjustment to record the accrued fees? Indicate each account affected, whether the account is increased or decreased, and the amount of the increase or decrease. b. If ...
May 25, 2014

English 4
1. Which of the following displays a correct use of pronouns? A. Soung spent more money than me B. Jamal was as interested as her C. Claudia has always been better at math than I. 2. Read the following sentence and determine which sentence in each set of three is punctuated ...
May 23, 2014

English 4 help
1. Which of the following statements is the best example of a limited subject for a research project? A. animal behavior B. animal welfare C. how to improve animal welfare D. improving welfare of farm animals 2. When evaluating the credibility of a source it is most important ...
May 23, 2014

English 4 help
1. both George Orwell and Stevie Smith employed irony in their writing. True or False 2. Alfred, Lord Tennyson's poem "Crossing the Bar" and Dylan Thomas's poem "Do Not Go Gently into That Good Night" convey a similar view point about death. True or...
May 23, 2014

Economics
People are more likely to clean up waste in their homes than at a community park because.. A. people expect the community park to be dirty. B. hiring a person to clean the home is expensive. C. they own and therefore feel responsible for their home. D. there is no penalty for ...
May 21, 2014

Chemistry
What are the three essential parts to make a battery? Cell reducing agent acid fuse porous barrier or salt bridge voltage regulator oxidizing agent
May 14, 2014

chemistry
Write the balanced equation for the neutralization reaction between H3PO4 and NaOH in aqueous solution. Phases are optional.
May 14, 2014

Chemistry
How many milliliters of 4.25 M H2SO4(aq) are needed to react completely with 45.9 g of BaO2(s)?
May 14, 2014

CHEM 101
Draw a reaction profile for reaction 2N2+O2+heat→2N2O, must include proper labels for each axis, reactants, products, indication for activation Energy and transition state
May 2, 2014

Chemistry
To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 10.9 g, and its initial temperature is -12.0 °C. The water resulting from the melted ice reaches the temperature of your skin, 29.6 °C. How much heat is ...
April 12, 2014

math
IF I RAN 3/8 OF A MILE HOW MUCH FURTHER WOULD I HAVE TO RUN TO MAKE A MILE
April 11, 2014

accounting
At the end of the current year, $19,900 of fees have been earned but not billed to clients. a. What is the adjustment to record the accrued fees? Indicate each account affected, whether the account is increased or decreased, and the amount of the increase or decrease. b. If ...
April 7, 2014

math
Kathy scored 9 points. that was 18% of her teams score. How many points did the team score?
February 25, 2014

physics
a 2250 kg car is traveling at 20 m/s to the west. the force required to stop the car at 7890 N to the east. How long will it take the car to stop? How far would the car move before stopping?
February 25, 2014

Physics
A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Ini- tially a car is 29 m behind the train, traveling in the same direction as the train at 38 m/s and accelerating at 2 m/s2. What is the speed of the car just as it passes the train? Answer...
February 20, 2014

Physics
A student performs a ballistic pendulum experiment using an apparatus similar to that shown in the figure. Initially the bullet is fired at the block while the block is at rest (at its lowest swing point). After the bullet hits the block, the block rises to its highest ...
February 20, 2014

Statistics
There are 100 questions from a SAT test, and they are all multiple choice with possible answers of a,b,c,d,e for each question only one answer is correct. Find the mean number of correct answers for those who make random guesses for all 100 questions?
February 13, 2014

math
A.5/6 B.5/8 C.?
February 6, 2014

Emmert
An astronaut mass has a mass of 100kg She recedes from her spacecraft using spurts of gas from a small unit on her back. If the force generated by the gas spurt is 50N calculate her acceleration
February 6, 2014

accounting
At the end of the current year, $19,900 of fees have been earned but not billed to clients. a. What is the adjustment to record the accrued fees? Indicate each account affected, whether the account is increased or decreased, and the amount of the increase or decrease. b. If ...
February 4, 2014

physics
3. A man leaves his home by car and travels 5 km on a road running due East. The driver then turns left and travels 2 km due north to a junction where he joins a road that goes North West and drives a further 2 km. Find his displacement from home by then.
February 2, 2014

physics
A 0.5 kg soccer ball is kicked with a force of 50 Newtons for 0.2 sec. The ball was at rest before the kick. What is the speed of the soccer ball after the kick?
January 23, 2014

physics
A 3kg ball is accelerated from rest to a speed of 10 m/s. What is the ball's change in momentum?
January 23, 2014

physics
A net force of 100 newtons is applied to a 20 kg cart that is already moving at 3 meters per second. The final speed of the cart was 8 m/s. For how long was the force applied?
January 23, 2014

science... PLEASE HELP!
Solids have a fixed shape and volume. Their molecules are locked in place. The molecules constantly vibrate, but they cannot move or switch places with other molecules. As a result, a solid retains its shape and size.
January 23, 2014

physics
A 1,400kg car is traveling in a straight line. Its momentum is equal to 2,000 kg. What is the velocity of the car?
January 23, 2014

physics
A beach ball rolling in a straight line toward you at a speed of 0.5 m/sec. Its momentum is 0.25kg m/sec. What is the mass of the beach ball?
January 23, 2014

science
An 8kg bowling ball is rolling in a straight line toward you. If its momentum is 16kg m/sec, how fast is it traveling?
January 23, 2014

Geometry
Stephanie casts a shadow of 1.2m and she is 1.8m tall. A wind turbine casts a shadow of 10m at the same time that Stephanie measured her shadow. Draw a diagram of this situation and then calculate how tall the wind turbine is.
January 11, 2014

world geography
In Iceland and the British Isles, the ocean creates a __________________ . a. mild temperatures c. hot and humid temperatures b. cold and wet temperatures d. hot and dry temperatures
December 13, 2013

Algebra 1
Thanks
December 5, 2013

Algebra 1
6y^-3 Can you show steps on how to do this
December 5, 2013

Algebra 1 HELP
I am not sure how to do these 2 problems can someone show me. Simplify the expression Write answers using exponents. 8^6/8^4*8^2 4^5*1/4^2 <---is by the 4 only
December 5, 2013

Statistics
$145 million for FY04 and $ 0 million for FY05
December 3, 2013

QNT/351
Describe a business situation, other than what has already been selected by fellow students or selected from the team assignment, where mean and standard deviation can be used in decision making. Describe how calculation of mean and standard deviation can help in making a ...
November 26, 2013

Physics
A 5 kg block is hanging from the top of an elevator if the elevator is accelerating upward at a rate of 3m/s/s, what is the tension in the rope that the block is hanging from?
November 24, 2013

math
How do you get 105?
October 9, 2013

math
At the ruins of Caesarea, archaeologists discovered a huge hydraulic concrete block with a volume of 945 cubic meters. The block's dimensions are x meters high by 12x - 15 meters long by 12x - 21 meters wide. What is the height of the block? I have no idea how to do this. ...
October 9, 2013

chemistry
Im stuck on these few questions that seems to be getting me no where : -Determine the number of mmoles of HCl that did not react with the anatacid. c HCl = 0.1812 c NaOH = 0.1511 volume of HCl added : 75 volume of NaOH added: 29.23,19.58,33.3 - mmoles of HCl neutralized by the...
October 8, 2013

algebra 2
What is the absolute value if 10-7i?
September 17, 2013

PSY202
in order ti increase self-esteem, experts say you should a:praise any behavior without reservation b:acknowledge completed tasks, especially those that are difficult c:avoid tasks that are easily completed d:set high standards, especially in areas that are not relevant to your...
September 17, 2013

physics
A Boeing 787 is initially moving down the runway at 3.0 m/s preparing for takeoff. The pilot pulls on the throttle so that the engines give the plane a constant acceleration of 1.7 m/s2. The plane then travels a distance of 1900 m down the runway before lifting off. How long ...
September 8, 2013

physics
The Graph above shows the speed of a car traveling in a straight line as a function of time. The car accelerates uniformly and reaches a speed Vb of 4.00 m/s in 8.00 seconds. Calculate the distance traveled by the car from a time of 1.20 to 4.40 seconds.
September 8, 2013

Early childhood
I need to see an written example of a summary report on a child for preschool that covers the seven domain. 1.Personal and social development 2. Language and Literacy 3. Mathematical Thinking. 4. Scientific Thinking. 5. Social Studies. 6. the Arts. 7.Physical development, ...
August 24, 2013

Math
If Ginny took out a loan for 21,000 in 8/2011 at 6.5% and wants to pay off in 9/2013, and has been making monthly payments of $239.00 how much will she be charged to pay it all? Please help. Thanks
August 22, 2013

English
how can i rephrase this so that both parts are parallel Lots of my friends think that Prince's music is old, but I think it's not only excellent but also an innovation.
August 17, 2013

Business and Finance
Jeff Jones earns $1,200 per week. He is married and claims four withholding allowances. The FICA rate is as follows: Social Security rate is 6.2% on $97,500; Medicare rate is 1.45%. To date his cumulative wages are $6,000. Each paycheck, his employer also deducts $42.50 for ...
August 13, 2013

Math
When a not-for-profit facility receives a contribution from a member of the community, the cost of the capital is inconsequential when deciding how to use the contribution, because it is, in effect, free money.”
August 6, 2013

Psychology
Nelda is fearful of public places and has managed to stay "at home" for the last three years. She and her therapist have developed a strategy. During the first week, she will go to the front door and open it and look outside. If she can remain calm, the goal for the ...
July 26, 2013

Psychology
ok thank you
July 26, 2013

Psychology
It had been a confusing afternoon which Martin was embarrassed to share with anyone. About one o'clock, he suddenly realized that he was in a strange place with strange people who called him by name. Martin found himself in a town he had never heard of and wondered where ...
July 26, 2013

Psychology
Marvin collects things, not cars, or baseball cards, or even beer bottles. Marvin collects everything. He cannot seem to stop picking up "stuff" from the street or dumpsters. If he attempts to pass by a target for collection, he is overwhelmed with tension and must ...
July 26, 2013

trig
use a half-angle identity to find the exact value of tan 105 degrees.
July 22, 2013

Media/Social Science
What is the theory of Habermas? How would you explain the theory of communicative rationality? How do you think the thoughts of Habermas apply to the real world?
July 19, 2013

public speaking
for communication to take place there has to be?
June 26, 2013

Math
How do you weight probabilities to add up to 1? Example: Chance of rain .25 Chance of person wearing purple hat .1 Chance of person wearing red hat .05 Chance of person wearing black hat .2 Chance of person wearing yellow hat .1 Chance of person wearing white hat .3 So, You ...
June 17, 2013

Healthcare
choose a product or service category that is at each stage of the product lifecycle--one each for introduction, growth, maturity, and decline. Explain your selection Propose strategies for effectively marketing each product or service you selected.
June 10, 2013

Math
Mr foster places 11 garden lights along an 80 meter path. Each light is placed an equal distance apart. How far away is the sixth garden light from the second?
June 5, 2013

math
John has a loan of $15,000. How much will his monthly payment be at 6.8% over a 10-year term
May 23, 2013

Algebra II Part 2
Use a graphing calculator to solve the equation -3 cos t=1 in the interval from 0 to 2p.Round to the nearest hundredth
May 19, 2013

algebra II Part 2
The equation h=7 cos{pi/3 t} models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched an then released. (C).Find the times at which the weight is at a height of 1 cm,of 3 cm,and of 5 cm below the rest position for ...
May 19, 2013

Algebra II Part 2
Verify the identity cot{0-pi/2=-tan 0
May 18, 2013

Algebra II Part 2
Use an angle sum identity to verify the identity cos 2 0=2 cos 0-1
May 18, 2013

Algebra II Part 2
Use a graphing calculator to solve the equation -3 cos t=1 in the interval from 0 to 2 p.Round your answer to the nearest hundredth
May 18, 2013

Algebra II Part 2
The equation h=7 cos{pi/3 t} models the height h in centimetres after t seconds of a weight attached to the end of a spring that has been stretched and then released. Find the times at which the weight is at a height of 1 cm,of 3 cm,and of 5 cm below the rest position for the ...
May 18, 2013

science-physics
A worker sits at one end of a 183-N uniform rod that is 2.80 m long. A weight of 107 N is placed at the other end of the rod. The rod is balanced when the pivot is 0.670 m from the worker. Calculate the weight of the worker
May 15, 2013

Chemistry pH
What is the pH of a solution that is .60 M H2SO4 (Sulfuric acid) and 1.7 M HCOOH (formic acid).
May 10, 2013

Calculus 1
Find the antiderivative of f(x)=5e^x-2secxtanx showing steps please
May 2, 2013

Calculus
The current circulation of a particular magazine is 3,000 copies per week. The editor projects a growth rate of g(t) = 4 + 5t^2/3 copies per week after t weeks. a. Find the circulation function based on this projection. b. Find the circulation in 2 years.
April 26, 2013

Chemistry
What is the amount of work produced when 1.0 g of H2O (l) is boiled at atmospheric pressure? Assume the liquid has no volume.
April 24, 2013

Social Studies
who was the american commander responsible for catching the philippines
April 16, 2013

Geometry Part 2
At a track meet,50 people ran the 100- meter dash.2 people finished in 11 seconds,5 people finished in 12 seconds,8 people finished in 13 seconds,10 people finished in 14 seconds,21 people finished in 15 seconds,2 people finished in 16 seconds,and 2 people finished in 17 ...
April 16, 2013

Geometry Part 2
Janine made a cylindrical vase in which the sum of the lateral area and area of one base was about 3000 square centimetres.The vase had a height of 50 centimetres .Find the radius of the vase.Explain your method you would use to find the radius .
April 15, 2013

Geometry Part 2
State whether the transformation of a Preimage and Image circles appears to be a rigid motion?Explain
April 15, 2013

Geometry Part 2
A forest ranger spots a fire from a 28- foot tower.The angle of depression from the tower to the fire is 11.To the nearest foot,how far is the fire from the base of the tower?Show the steps you use to find the solution.
April 15, 2013

Geometry Part 2
A highway makes an angle of 6 with the horizontal.This angle is maintained for a horizontal distance of 5 miles.To the nearest hundredth of a mile, how high does the highway rise in this 5- mile section?Show the steps you use to find the distance.
April 15, 2013

Geometry Part 2
A triangle has side lengths 10,15,and 7.Is the triangle acute,obtuse,or right?Explain.
April 15, 2013

science
you run 100m in 25's. if you later run the same distance in less time , does your average speed increase or decrease? explain.
April 14, 2013

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
April 9, 2013

Chemistry
Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??
April 9, 2013

Chemistry
Calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2.
March 30, 2013

Chemistry
Calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2.
March 30, 2013

Math
Haha thanks and cause i forgot to multiply -3x+2 by 5
March 17, 2013

Math
Thanks for the help and reiny no thats not the denominator its 2x/5 - 3x+2 greater than or equal to x-1
March 17, 2013

Math
2x/5 - 3x +2 >= ( greater than or equal) x-1 My answer was x is less than or equal to 7.5 but im not sure
March 17, 2013

computer science
You are required to use the Account class to simulate an ATM machine. Create ten accounts in an array with id 0, 1, 2 ...9, and initial balance $50. The system prompts the user to enter an id. If the id is entered incorrectly, ask the user to enter a correct id. Once an id is ...
March 13, 2013

calculus
The rate of change of an investment account earning continuous compound interest is given by dA/dt=kA where k is a positive constant. The initial account value was $2500. At the end of the third year, the account value was $4200. Find the particular solution to the ...
March 13, 2013

Spanish
Que te gusta hacer? My choices are (A).A mi tambien (B).No,no me gusta. (C).No,me gusta Tampico. (D).Me gusta montar en monopatin
March 12, 2013

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