# Posts by Stephanie

Total # Posts: 1,218

Statistics
: For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...

Algebra
What are some rational equation applications used in forensics or crime scene investigation?

Organic Chemistry
What will be the result when ketone is added with ethylene glycol and TsOH?

Algebra 2/ trig
sin theta= 7/25, 0< theta < pi/2 cos beta=8/17, 0, beta, pi/2 Find(theta+ beta)

Science
try searching on websites that is what i did

medical claims and billing
Kathy, a 33 year old established patient sees Dr. Owens in her office for what she thinks is a sinus infection. Her history and exam are both expanded problem focused with the decision of making low complexity. Her diagnosis is acute sinusitis. What is the CPT Code and ICD-9-...

physics
when i was doing it ... everything was alright until the last part... (28 = 3.5 Vbig^2 --> Vbig = 2.828 m/s <-- Q = Area big* Vbig = .00229 m^2 * 2.828 m/s = .00647 m/s = 6.047 cm/s

maths
Thanks! I've no idea, i thought my answr was too far off but I was using the wrong formula. Thanks!

maths
In the year 2000 there were 350 mobile phones users living in the small town of Phoneville. Since 2000 the number of residents using mobile phones has increased by 25% each year, that is, each year the number of mobile phones increases by a factor of 1.25 Calculate, to three ...

physics
7.5 m/s

government
Why are political parties created?

music
The form of the melody called the bar form is represented by A)AAB B)ABB C)ABA D)ABBA

AP Statistics
Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses were placed on a ...

Physics
Still stuck...see post at 3:34pm. I don't think I'm understanding the instructions regarding what #'s to use for sin and cos.

Physics
The answer is supposed to be 16.5N. I can't get it. Is angle A, 100deg? I took 0.80/2.5 = .32 and then cos (.32) = .9999deg. And then in the final equation, for sin A I got sin (100deg) = 98.4. This doesn't seem right.

Physics
Q #2: (only other one I'm stuck on...) A 10-kg ladder 2.5m long rests agaist a frictionless wall with its base on the floor 80cm from the wall. How much force does the top of the ladder exert on the wall? I've found answers to similar questions on this site, but not ...

Physics
A 30-lb weight is attached to one end of a 6-ft uniform beam whose own weight is 20-lb. Where is the balance point? Thanks in advance.

Physics
A 100-kg box is suspended from two ropes; the left one makes an angle of 20degrees with the vertical, and the other makes an angle of 40degrees. What is the tension in each rope. I think I've got the basics: I have Fx=T1(x) + T2(x)= 0 to calc the first tension, and Fy= T1(...

Physics
A 30-lb weight is attached to one end of a 6-ft uniform beam whose own weight is 20-lb. Where is the balance point of the system? I know the answer is "1.2 ft from the 30-lb weight" but I can't figure out how to get there. Please help. Thanks...

Algebra 1
Thank you very much.(:

Algebra 1
Can someone please help me?!?! This is solving for x & y. And it so complicated to me.! And worst of all I have a test on it tomorrow.! D:<

Algebra 1
You drive a car that runs on ethanol and gas. You have a 20-gallon tank to fill and you can buy fuel that it is either 25 percent ethanol or 85 percent ethanol. How much of each type of fuel should you buy to fill your tank so that it is 50 percent ethanol?

Music
Von Bingen's Play of Virtues is set to which of the following types of music?

music
In plainchant, a sentence of text almost always ends with

music
A)was easily understood by the listener B)conveyed happiness C)want't monotonous D)had enjoyably rhythm

music
Landini's tendency to intersperse occasional melismas in text that was generally syllabic in nature helped to ensure that the music

Science
calculate the mass of sodium nitrate in grams in a 150 ml solution of a 5.00 M solution of sodium nitrate

math/115

Chemistry
I had to miss a lab yesterday. Do you know of a website where I can virtually prepare methyl salicylate (oil of wintergreen)? The experiment involves salicylic acid + methyl alcohol + concentrated sulfuric acid + heat....then when two layers form collect the top layer and ...

physics
"The mass density of brain matter is 1.040 g/cm^3, and of that, the mass fraction which is hydrogen, is 0.107. Find the number of hydrogen protons in a volume of 1cm^3 of brain tissue"

physics
We couldn't find "The mass density of brain matter is 1.040 g/cm^3, and of that, the mass fraction which is hydrogen, is 0.107. Find the number of hydrogen protons in a volume of 1cm^3 of brain tissue"

chemistry
how do you make 1.00g of NaC2H3O2 using: 0.400 M Na2Co3 0.300 M Pb(C2H3O2)2 NaOH solution with unknown molarity 0.500 M HC2H3O2 You don't have to use all of them

freedom similes and metaphors?
As free as the mind with imagination.

science
How many grams of oxalic acid dihydrate (H2C2O4) are needed to react with 38.56 ml of 0.2500 sodium hydorxide

Chem
Given this reaction: Pb(NO3)2 + 2 KCl --> PbCl2 + 2KNO a. How many milliliters of 2.00 M Pb(NO3)2 will react with 50.0 mL of 1.50 M KCl

MATH
If 20% of population have blue eyes, and 5 people are selected at random, what is the probability that at least 4 of them have blue eyes? HOW DO I FIND THE SOLUTION TO THIS PROBLEM?

trig
Evaluate each value as a trigonometric function of an angle in Quadrant 1. #1 cos (27pi/8)

Dividing Decimals
I don't get It neuther

PHI103:Informal Logic
Grading Summary These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 8/16/2012 Time Spent: 47 min , 28 secs Points Received: 25 / 25 (100%) Question ...

Biology
The human retina has an area of about 1000 mm^2. If we have a total of 125 million rods and 6.5 million cones in each eye, show that we have about 131,500 sensory cells per square millimeter in the retina.

Math
Jim bought a pair of shoes for \$50 and laces for \$1. If the sales tax is 7%, how much tax must he pay?

physics
Lance threw a ball straight up into the air. The ball's gravitational potential energy at its peak height was 0.4 joules, and its speed when it hit the ground was 4 meters per second. What was the mass of the ball?

Microbilogy
Albert Kluyver "From elephant to...bacteria-it is all the same!" What did he mean?

Statistics
The probability that a football game will go into overtime is 20%. What is the probability that two of three football games will go to into overtime? A) 0.384 B) 0.2 C) 0.04 D) 0.096

english
lol, Writeacher-I missed that one myself, and usually don't! My mom taught me more than the teachers in school did about English and spelling, so I feel like a dolt for missing it!!

english
I'm no teacher or tutor, but wouldn't the word "so" work to join them?

Microbiology
People with Rhinovirus infections of the nose and throat have an 80-fold increase in kinins and no increase in histamine. What do you expect for rhinoviral symptoms? What disease is caused by rhinoviruses?

Microbiology
People with Rhinovirus infections of the nose and throat have an 80-fold increase in kinins and no increase in histamine. What do you expect for rhinoviral symptoms? What disease is caused by rhinoviruses?

Chemistry
Write an equation for the reaction that takes place when LiOH is added to water.

Microbiology
Alright then, thank you-I'll try looking for what you said and go from there. I don't need a great big answer for this-just a sentence or two.

Microbiology
Ugh, believe it or not, this is a "glossing over" of the subject-the book I have doesn't even go chapter-by chapter. It starts with chapter 1, and skips to 5! After that, it goes from 7 to 10. The whole book might be 20 chapters, but not chronological-they skip. ...

Microbiology
Thanks! would that be the anser though, to that question as well?

Microbiology
I don't know what those are-I'm just struggling to get through this little bit of Science for a college course.

Microbiology
Gram stains and acid-fast stains of pus showed gram-positive acid-fast rods. What are the possible organisms?

College Algebra
1=(X-100)/((X+100)/2)) / ((2-1)/((2+3)/2) Solve for X I know X =200, but don't understand how to reach that anwser.

COM/155
Last night I took my daughters to go see Justin Bieber, Never Say Never movie. Its about a 16-year-old pop star’s FIRST(adj) concert film. It also EXPLORES(adj) Justin’s personal journey to a sold out concert in Madison Square Garden last year. It details how Justin...

COM/155
Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. I wrote my movie review but im really confused on which ones are adjectives and which ones are adverbs. could you please help me? Last ...

english
What can hold six gallons of water, be found in a survival kit, and be the size of my foot? (I wear a size 6 to 7.5 in shoes)

Survey of the Sciences
a typical cell in the body makes about 10 million molecules of atp per second. show that the cell breaks down about 263,258 molecules of glucose per second.

math
The house numbers on Carr Memorial Avenue follow a pattern.The first four houses on the left side of the street are numbered 8,14,20,and 26.How many more houses are on the left side of the street with numbers less than 50

calculus
no you can't find the y calues by using the equation to the tangent line because of the missing values for a, b and c. the first derivative is 2Ax+B so obviously that doesnt work out. but when we set it equal to zero, which we are supposed to do when we know all the values...

calculus
Let f(x)= Ax^2 + Bx + C. If f(x) passes through the point (-1,1) and has a relative minimum at (1,-13), find A, B, and C.

Survey of the sciences
When the hydronium ion comcentration of a solution equals 1 mole per liter, what is the pH of the solution? Is the solution acidic or basic?

Survey of the sciences
Show that one mole of sugar equals 342 grams.

Physics- Vectors
A bartender slides a beer mug at 1.4 m/s towards a customer at the end of a frictionless bar that is 1.8 m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar. (a) How far away from the end of the bar does the mug hit the floor? (b...

MATH
You have \$110 IN YOUR lunch account and plan to spend \$2.75 each school day. a) Write and graph a linear equation that represents the balance in your lunch account (i just need help making an equation for this problem) b) How many school days will it take to spend all of the ...

economics
the smith company made and sold 10,000 metal tables last year. when output was between 5,000 and 10,000 tables, its average variable cost was \$24. in this output range, each table contributed 60 percent of its revenue to fixed costs and profit. what was the price per table?

physics
Carrying out the following mathematical manipulations: (5.78 +/- 0.04)^2 How do you set this problem up?

Survey of the Sciences
Thank you Damon! now, here's the last part of that along with the first again.... Calculate the height from which a block of ice at zero degrees celcius nust be dropped for it to completely melt upon impact. Assume that there is no air resistance and that all the energy ...

Survey of the Sciences
Calculate the height from which a block of ice at zero degrees celcius nust be dropped for it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice.

Criminal Justice
I need to write a paper on the differences of police officers with a GEd and those with further education. Also do either have more civil rights complaints

Physics
Both block A and B mass 3kg and are initially 2m above the ground. They slide down a smooth ramp and then across a rough surface with a speed of 4m/s. How much energy did the block lose due to the friction along the rough surface? AND is transformed into what form of energy?

finance
Pick a company that pays dividends, then calculate the expected growth rate of your company using the CAPM. Once this task is complete, calculate the expected growth rate using the Constant Growth (or Gordon Growth) Model.

Physics
The radius of a circle is measured to be 12.8 ± 0.2 cm. I need to find the Area and the Circumference of the circle? But how to I account for the uncertainties in each value?

Calc
A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula 2zcos(14πwt) where y is in centimeters, t is time in seconds, w and t and are positive constants. What is the furthest distance (cm) of the mass ...

Calc
A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula 2zcos(14πwt) where y is in centimeters, t is time in seconds, w and t and are positive constants. What is the furthest distance (cm) of the mass ...

Calc
Consider a circle of radius 2 and a point P rotating around it. The angle θ, in radians, is given as a function of time t. (a) What is the value of θ when t=1.5? (b) Find the coordinates of P when t=1.5

Chemistry
370 mL

what was the importnat beaureacrats of the tang and song dynasties?

statistics
In baseball, is there a linear correlation between batting average and home run percentage? Let x represent the batting average of a professional baseball player. Let y represent the home run percentage (number of home runs per 100 times at bat). Suppose a random sample of ...

College Math
It is homework, I am doing the problems right now in Week 5 Assignment 2 of College Math at the AIPOD.

Chemistry
If 30.0 g of H2 were used, how many grams of NH3 would be made?

Algebra
correct!

Calculate the pH of a buffer solution made by mixing 174 mL of a 1.68M trimethylamine (CH3)3N solution with 250 mL of a 1.08M trimethylammonia chloride, (CH3)3NHCl solution.

math
break apart these numbers 40x16

A 0.12 g sample of unknown was placed in a flask and dissolved in 125 mL of deionized water. A solution of HCl (0.10 M) was used to titrate the sample, and 18 mL was required to reach the endpoint. What is the formula weight of the unknown?

chemistry
Write the 12 mole ratios that can be derived from the equation for the combustion of isopropyl alcohol?

geomety
solve for x 5 + x 10 ----- = ---- x 8

geometyr
determine the perimeter of triangle KLM, if triangle KLM-triangle FGH, FG=30, GH=38, FH=38 and KL=24

Europe
What role did the geography of europe play in the development of and ways of life in these towns?

Chem
When dissolved in an aqueous solution, which of the following salts will yield a neutral solution? Choose one answer. a. KCN b. NaHSO4 c. Na3PO4 d. AlBr3 e. MgBr2

Chemistry
One of the most obvious ways to tell that a chemical reaction has occurred, as we all know, is that the color of 'stuff' changes. Ligand exchange reactions are one class of reactions where this is very evident, as exemplified by the color change of a green Ni(H2O)62+ ...

Chemistry
I posted a question at 5:43pm yesterday...can anyone please help with at least some of it? Thank you so much.

Chemistry

Chemistry
I have spent all afternoon (on Thanksgiving, no less) trying to figure out these post-lab questions. We had to produce a precipitate of a reaction of: 1) 1 ml 1M Na2SO4 + 9mL 1M CaCl2 Our result was .569g 2) 5 ml 1M Na2SO4 + 5 ml 1M CaCl2 Our result was .01g 3) 9 ml 1M Na2SO4...

Physics
When tossed upward and hit horizontally by a batter, a 0.23 kg softball receives an impulse of 2.0 N·s. With what horizontal speed does the ball move away from the bat?

physics
A horizontal force of 25 newtons pushes a box a distance of 30 meters across the floor. How much work is done by the force?

Astronomy
Which one supports the solar nebula theory of the origin of the solar system? a.Disks are rare around young stars. b.Disks are common around young stars. c.The sun is the least massive object in the solar system. d.Planets are round.

science
thank you! I just thought that just because jupiter is a gaseous planet that it would have a lesser mass.

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