# Posts by Angela

Total # Posts: 1,685

**college**

100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop?

**college physics**

Would you need to know the mass to solve this problem?

**3rd grade**

3860

**pre algebra 7th grade**

Please explain this problem (r.r) (r.r)

**STATISTICS**

Use the random-number table to simulate the outcomes of tossing a quarter 25 times. Assume that the quarter is balanced (i.e., fair). (Start at row 1, and let 0, 1, 2, 3, 4 indicate heads and 5, 6, 7, 8, 9 indicate tails. Enter H for heads and T for tails, and enter your ...

**spanish**

Identifica las contribuciones politicas de los Mexicoamericanos en los Estados Unidos. (2 ejemplos)

**APA Citations**

Can someone show me an example of and APA Format citation from an internet source when no author name is given.

**poetry**

Is this a good Poem for a senior in creative writing? The topic is "The Power of Words" Words are one of the most powerful things in our lives. They can bring out many different feelings. Excited, sad, happy, or mad. Words put together can create a story. true or ...

**chemistry**

A stock solution's hypochlorite activity was determined as follows: . - 2.00g of liquid sodium hypochlorite (NaOCl) was weighed into a flask and diluted with 50mL deionized water.10mL of 10% sulfuric acid and 10mL of 10% potasssium iodide were added, followed by titration ...

**Chemistry-iodometric titration**

In an iodometric titration, excess potassium iodide solution (KI) is added to the sample.Analyte such as chlorine liberates iodine from KI under acidic condition. Liberated iodine is titrated against standard sodium thiosulphate. The concentration of analyte in the sample is ...

**Repost-Chemistry -please help**

Hi, sorry I missed out something. The titrant used was 0.100M Sodium thoiosulphate.Do I have to consider its concentration in the calculations? Thanks a lot. Posted by angela on Tuesday, August 3, 2010 at 6:58pm. Please help to determine the (%w/w) benzoyl peroxide (C14H20O4) ...

**Chemistry - please help**

Please help to determine the (%w/w) benzoyl peroxide (C14H20O4) in a sample. Procedure: 2.500g of sample was dissolved in 75ml dimethylformamide and diluted to 100.0ml with the same solvent. (Solution T). To 5.0ml of Solution T, 20ml of acetone and 3ml of a 500g/l solution of ...

**Elementary Stats**

A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 10 adults over 50, what is the probability that exactly eight wear glasses?

**Sin 4x**

a.)Find sin 4x if tan=0.6 b.) Solve: sinxsinx/2=1-cosx(0<x<2*pie

**ellipse**

Find the coordinates of the vertex and focus of the ellipse 9x Square+ 4y square=0.09

**math**

find the equation of line y=x+1 under each of the following transformations (a) (x,Y)-(x+3,Y+5) (b) reflections across the x-axis (c) reflection across the y-axis (d) half turn about origin

**Math**

Describe objects that have each of the following type of symmetry (a) line (b) point (c)plane (d) 90% rotational

**Stress Management Techniques**

U ALL ARE ALL WRONG. AND HATE LIERS . DON'T POST AND MAKE IT SEEM LIKE ITS ALL THE TRUTH CAUSE NO OF THEM WAS RIGHT

**Stress Management Techniques**

I am taking the same course and I just made a 30 using these answers thanks

**Statistics**

The population standard deviation is estimated to be $300. If a 98% confidence interval is used and an interval of +/-$75 is desired, how many cardholders should be sampled?

**Math**

P/3 - 3P/8 =

**Statistics**

What does it mean when a researcher chooses the cutoff in a comparison distribution to be .01? a. It means that to reject the null hypothesis, the result must be higher than a z score of .01 b. It means that to reject the null hypothesis there must be less than a 1% chance ...

**math**

what is the measure, in radians, of a central angle formed by cutting a circular pizza into 12 equal wedge shaped pieces?

**Psychology 210**

children tend to organize their words into male and female categories. This best illustrates their use of? a-the pruning process b- behavior genetics c-gender schemas d-the male answer syndrome

**Chemistry**

What is the H3O+ in a solution that contains 1.48 g HNO3 in 0.560 L of solution?

**Chemistry**

Calculate the OH- of each aqueous solution aspirin, 5.9×10−4 M milk of magnesia, 1.5×10−9 M

**algebra2**

what is percent notation

**algebra2**

find percent notation 15/25

**adult education**

it delayed until the following year $10 million of maintenance on city highways. how would you require that it be accounted for and reported.

**Operational Management**

I just want to make sure I am on the right track with my numbers. I can do the writing part of the assignment with no problem. Math is just not my strong suit.

**Operational Management**

I think alternative B is the best because the total cost is $1,266,900 compared to Alternative A at $1,394,620. B has more people but less money spent

**Operational Management**

I need help with the cost benefit matrix. This is what I have so far.... Alternative 1 Number of employees 6 Hourly salary $43 Number of claims per year 0.3 Capital Invested $1,300,000 $61,920 labor cost per month/ 30 days $32,700 claims per year based on $109,000 per claim ...

**Operational Management**

Taylor Inc. manufactures widgets. There is a particular assembly line for Widget X. This assembly line includes the assembly of various raw materials, subassemblies, and packing of the finished widget. Currently, approximately 27% of the total labor time is utilized in walking...

**Anatomy & Physiology 1**

Ummm.... There are a few that are wrong 14. A 72-year-old man is diagnosed with a 7cm primary tumor in his colon, which has spread to the liver. Which of the following features indicates that the tumor is malignant? A- the patient's advanced age B- the location of the ...

**1st grade/english**

wich word is correct fill the pot or fill the pop

**math**

a 7 digit phone number has a 3 digit prefix followed by 4 digits.how many different phone numbers are possible??

**SCIENCE**

how to make electrohemical cell with iron and aluminium foil? I should make that at home and at school teacher will give me acid or something to put metals in that. And i should know how to conect that with wires and make the bulb light - so i should conect that and make ...

**Science ( chemistry )**

PLEASE I NEED HELP IT IS URGENT !!!!!!!

**Science ( chemistry )**

how to make electrohemical cell with iron and aluminium foil? I should make that at home and at school teacher will give me acid or something to put metals in that. And i should know how to conect that with wires and make the bulb light - so i should conect that and make ...

**biology**

How has the origination of macromolecules contributed to organismal development?

**French**

In the first sentence, you left out the "r" in horloge

**Biology**

Elaborate on the role that isomers and functional groups could have lead to the creation of life. Cite one example using a functional group of your choosing

**math**

How do I say .7542?

**social studies**

How do teams determine when a paper or paragraph is good enough to turn in to be graded compared to individuals?

**social studies**

How do teams determine when a paper or paragraph is good enough to turn in to be graded compared to individuals?

**social studies**

How should difficult issues like plagiarism be addressed-and why would these techniques be appropriate?

**social studies**

How do teams determine when a paper is good enough?

**social studies**

No, it is part of my homework to complete a persuasive essay to convince my company the value of providing tuition reimbursement and make extra time for adults learning.

**social studies**

No, it is part of my homework to complete a persuasive essay to convince my company

**social studies**

Thank you very much.

**social studies**

I need help in starting a persuasive essay where the strategy is to convince my company of the value of providing tuition reimbursement and making extra time for adult learning

**chemistry**

If you calculate the density of a gallon of CO2 gas at 27degrees celcius and 0.50 atomic pressure what the atomic pressure be?

**6th grade - English**

i need help with nt

**Biomedical Science**

Rapid addition of the nitric acid:sulfuric acid mixture increases the chance of side products forming.

**Algebra**

theres been less inflation

**math**

Which expression is equivalent to the expression below? 3x 1 - 5

**Medical Transcription**

Which process involves the removal of thin layers of malignant growth and subsequent microscopic examination? A. Xenograft C. Electrodessication B. Mohs’ surgery D. Patch test

**3rd Grade Math**

I NEED HELP ON MATH

**Organic Chemistry 51B**

can you please explain to me how to use the percentage concentration to calculate volume

**math**

the probability is that yes it would land on heads.

**literary**

write an essay on the religious language and reference to fire in McCathy's novel The Road

**math, algebra**

How do you divide by 5 n=3?

**Matt 115**

Thanks so much I really appreciate your help!

**Matt 115**

Hello, I just wanted to know if someone could check my work to see if they are right or wrong. Thanks :) 5. Find 2/5 of 4/11. Answer: 8/55 8. Are 3/21 and 3/54 equivalent fractions? Answer: No 14. Write in decimal form 8 583/10,000 Answer: 8.0583 22. Solve for the unknown: 8/...

**math**

hi, how are you i am in 5th grade and i want to ask you how i do this listen: matt had $40. he spent $10 on books and $14 on markers.what fraction of his money did he spent?

**5th grade**

find a percent of a number

**CHEMISTRY**

HOW MANY MOLES OF NH3 WOULD BE FORMED FROM 50 GRAMS OF (NH4)2SO4 IN THE FOLLOWING EQUATION? (NH4)2SO4 + 2 NaOH=2NH3 + 2 H2O + Na2SO4

**CHEMISTRY**

HOW MANY GRAMS OF CO2 WOULD BE FORMED FROM 20 GRAMS OF C6H6 IN THE FOLLOWING REACTION? 2 C6H6 + 15O2=12CO2 +6 H2O

**Medical Coding and Billing**

Explain th importance of a fee schedule and the factors it's based on.

**physic**

When you divided by re^2, shouldn't you have multiplied by re^2?

**math**

Write improper fraction as a mixed number or a whole number: 13/12

**college chemistry**

I need to know how to calculate the value of the equilibrium constant for the reaction of zinc metal in a solution of silver nitrate at 25 degrees c. I am totally lost and do not even know if I have all the data I need. Help!

**7th grade**

-6d/3 when d=-10

**science**

it has at lease one meal and one nonmetal element. compound salt

**Marine Science**

Clownfish Mating: Can you compare and contrast reproductive strategies employed by other animals?

**english**

How do you set up a topic sentence when writing an english paper?

**Physics**

A 1500kg car skids to a halt on a wet road where μk= 0.53. How fast was the car traveling if it leaves 62-m-long skid marks?

**Physics**

What is the terminal speed for an 84.0kg skier going down a 37.0degree snow-covered slope on wooden skis μk= 0.060? Assume that the skier is 1.80m tall and 0.300m wide.

**Physics**

The figure shows four electrical charges located at the corners of a rectangle. Like charges, you will recall, repel each other while opposite charges attract. Charge B exerts a repulsive force (directly away from B) on charge A of 3.0 . Charge C exerts an attractive force (...

**physics**

A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 6.0m/s. A wise elder duck finally realizes that the solution is to fly at an angle to the wind. If the ducks can fly at 8.0m/s relative to the ...

**physics**

The treasure map gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 490 paces, then due east for 120 paces. Dig." But when you arrive, you find an angry dragon just north of the tree. To avoid the dragon, you set off...

**linear algebra**

I am trying to find the inverse of matrix A but I don't know how to do it with sin and cos. Please help. A=6e3tsin(6t) −6e4tcos(6t) −5e3tcos(6t) −5e4tsin(6t) then A−1=

**physics**

David is driving at a steady 30.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 m/s^2 at the instant David passes. How far does Tina drive before passing David and what is her speed as she passes him?

**physics**

Santa loses his footing and slides down a frictionless, snowy roof that is tilted at an angle of 26.0. If Santa slides 7.00 before reaching the edge, what is his speed as he leaves the roof?

**7th grade**

Could you help me with this -3nsquare + 2n + 8 for n = -2? Sorry can make the square on my computer.

**Math**

fifteen,10+5,5*3=15.nine houndered,ninety nine,900+90+9,333*3=999

**math**

The area of a driveway. What metric unit would I use to figer outthe proublum

**Third Grade Math**

no because you can add to make it even

**math**

12r-4r=28

**math**

belle bought packages of beads for her project.ben bought twice as many packages as belle.micalla bought three times as many packages as belle.altogether,they bought 24 packages of beads.how many packages did each person buy?

**math**

what kind of questions are you doing?

**college**

accounting/// which journal would be used if you returned merchandise that had been bought on account , sales journal, purchase journal, cash receipts journal, cash payments journal or general journal. i thought it would be on a general journal

**algebra**

how to work and solve 7(y-2)+8=3(y-4)-2

**5th grade Math**

68.99+22.31

**5th grade English**

What is the predicate in this sentence? This alloy contains a mixture of iron and carbon.

**Interpersonal Communication**

I have to write a scenario to this showing I know the concept... -Responding non-defensively when your face is threatened. What concept would I use or is it and have to write a scenario for it.

**science**

THE SUN

**art**

There isn't even a question posted!

**College Algebra**

Solve for x: 3^(2x)=14 We've gotten: 2x=log(subscript 3)14=2.4 Is this two answers, or what?

**Social Science**

No, he is under the age of 18, so therefore is not considered and adult and capable of making a decision like that for himself. His rightful guardian must decide...that is unless he is emancipated from his guardian(s) by a court of law. Which, by the way, is a very long and ...