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July 23, 2014

July 23, 2014

Post a New Question | Current Questions

**College Chemistry**

Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2O What mass of water is liberated when a 2.763 gram sample is heated to constant mass?
*Saturday, October 8, 2011 at 1:13am*

**College Physics**

In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction ...
*Saturday, October 8, 2011 at 12:28am*

**College Physics**

The top layer of your goose down sleeping bag has a thickness of 5.0 cm and a surface area of 1.0 m^2. When the outside temperature is -18 degrees celcius you lose 24 Cal/hr by heat conduction through the bag (which remains at a cozy 34 degrees celcius inside). Assume that you...
*Friday, October 7, 2011 at 11:36pm*

**College Physics**

The top layer of your goose down sleeping bag has a thickness of 5.0 cm and a surface area of 1.0 m^2. When the outside temperature is -18 degrees celcius you lose 24 Cal/hr by heat conduction through the bag (which remains at a cozy 34 degrees celcius inside). Assume that you...
*Friday, October 7, 2011 at 11:36pm*

**College Physics**

A 2.30-cm-thick wood floor covers a 4.0 m x 5.5 m room. The subfloor on which the flooring sits is at a temperature of 16.4 degrees celcius, while the air in the room is at 19.3 degrees celcius. What is the rate of heat conduction through the floor? Use 0.200 W / m x K for the...
*Friday, October 7, 2011 at 11:32pm*

**College Chemistry**

What is the final temperature, in oC, after a 26.5 g piece of ice, at 0oC, is placed in a styrofoam cup with 122 g of water initially at 73.8oC the specific heat of water = 4.184 JK-1g-1 The heat of fusion of ice = 333 Jg-1
*Friday, October 7, 2011 at 10:11pm*

**statistics**

SAT Exam Scores – A school administrator wonders if students whose first language is not English score differently on the math portion of the SAT exam than students whose first language is English. The mean SAT math score of students whose first language is English is 516...
*Friday, October 7, 2011 at 9:18am*

**English-Writing**

Many students fear the thought of college. It is not only the transition from high school that intimidates them, but large classrooms, two hour seminars, and worse part, the fear of failure is what keeps them from going. Hence either take shorter hours, gap years, or some even...
*Friday, October 7, 2011 at 6:49am*

**college chemistry**

For the equilibrium Br2 + Cl2 goes to 2BrCl at 400 K ,Kc = 7.0. 0.30 of Br2 and 0.30 of Cl2 are introduced into a 1.0 L- container at 400 K.a) What will be the equilibrium concentration of Br2? b) What will be the equilibrium concentration of Cl2 ? c) What will be the ...
*Friday, October 7, 2011 at 4:11am*

**college chem**

what volume of 0.955 M HCl, in milliliters, is required to titrate 2.152g of Na2CO3 to the equivalent point? Na2CO3(aq) + 2HCl(aq) 2NaCl(aq) + CO2(g) + H2O(1) can this please be explained in simple step by steps? i am sick and i am having trouble understanding anything.
*Thursday, October 6, 2011 at 8:25pm*

**College Chemistry**

How many milliliters of 0.100 M HNO3 are needed to neutralize the following solutions? A. 45.0 mL of 0.667 M KOH B. 58.5 mL of 0.0100 M Al(OH)3
*Thursday, October 6, 2011 at 6:27pm*

**HELP ASAP ( COLLEGE STATISTICS)**

Describe in words the nature of the relationship between each pair of variables as indicated by the value of the correlation coefficient. Be sure to include a. the direction of the relationship. b. the strength of the relationship. c. a verbal description of the way the ...
*Thursday, October 6, 2011 at 4:51pm*

**English**

My essay, the writing centre told me that my introduction essay was not to the point of being a succesful student. So I changed it. Here, could you please help me rephrase it .. My two most important points are the TWO STEPS : Daily and punctual attendance and dedication to ...
*Thursday, October 6, 2011 at 2:58pm*

**college algebra**

SKILL MAINTENANCE. Calculate: 2b + 8 – 3b = 10 + 11b – 2 – 12b
*Thursday, October 6, 2011 at 11:43am*

**Statisics**

35%of adult Americans are regular voters. A random sample of 250 adults in a medium-size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results... Can you show ...
*Wednesday, October 5, 2011 at 11:54pm*

**College Algebra**

(2.2 x 10^-3)(4.3 x 10^8) I get 9.46*10^5 is this correct?
*Tuesday, October 4, 2011 at 10:28pm*

**College Algebra**

Which of the following is equivalent to (2x-3)^2=25 ? A) 2x - 3 = 5 B) 2x - 3 = -5 C) 2x - 3 = 5 and 2x - 3 = -5
*Tuesday, October 4, 2011 at 8:40pm*

**Math**

Determine whether the following statement makes sense or does not make sense, and explain your reasoning: By modeling attitudes of college freshmen from 1969 through 2006, I can make precise predictions about the attitudes of the freshman class of 2020. A) This makes sense ...
*Tuesday, October 4, 2011 at 7:59pm*

**college chem**

Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 20.0 g sample of ethanol initially at a temperature of 13.6oC. The specific heat of ethanol is approximately constant at 2.44 JK-...
*Tuesday, October 4, 2011 at 3:56pm*

**College Chemistry**

Calculate the concentrations of the following solutions, assuming the volumes are exact measurements: a. 18.64g of sodium hydroxide in 350mL of solution b. 8.97mL of 18M hydrochloric acid in 250mL of solution
*Tuesday, October 4, 2011 at 2:50pm*

**college physics**

Human skin (choose all that apply) 1. emits radiation well. 2. absorbs radiation well. 3. does not emit radiation well. 4. does not absorb radiation well. 5. has an emissivity of 0.
*Tuesday, October 4, 2011 at 12:36am*

**college physics**

If you are sitting at home in your room, the walls 1. emit visible light with a peak wavelength close to 0.5 micrometer. 2. emit thermal radiation in the near infrared with a peak wavelength close to 1 micrometer. 3. emit thermal radiation in the mid-infrared with a peak ...
*Tuesday, October 4, 2011 at 12:36am*

**college prep english**

Ok so long story short I need help with homework......I have 3 questions on genre and its 2 genre's how do I know which one to write about ?
*Monday, October 3, 2011 at 8:17pm*

**college general chem**

If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? What is the oxidation state of an individual sulfur atom in ? What is the oxidation state of an individual nitrogen atom in ?
*Monday, October 3, 2011 at 7:38pm*

**college general chem**

If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? How many milliliters of 4.45×10−2 contain 4.05 of solute
*Monday, October 3, 2011 at 7:31pm*

**college algebra**

If the average rate of change of g(x) from x = 7 to x = 10 is -80, and if g(7) = 400, then find g(10).
*Sunday, October 2, 2011 at 8:46pm*

**college Algebra**

If the average rate of change of g(x) from x = 1 to x = 5 is 17.5, and if the average rate of change of g(x) from x = 5 to x = 10 is 35, then what is the average rate of change of g(x) from x = 1 to x = 10?
*Sunday, October 2, 2011 at 8:13pm*

**College Chemistry**

Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the -2 mM, 7.16 times 10 to the -3 mM, 0.965 mM, and 5.00 times 10 to the -2 mM, respectively. What are the corresponding concentration is milligrams per liter? A. ...
*Sunday, October 2, 2011 at 7:03pm*

**College Chemistry**

How many grams of solute are needed to prepare each of the following solutions? A. 1.000 L of 0.180 M NaCl B. 250.0 mL of 0.150 M CuSO4 C. 500.00 mL of 0.355 M CH3OH
*Sunday, October 2, 2011 at 6:39pm*

**college physics **

How many revolutions per minute would a 18 m-diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point?
*Sunday, October 2, 2011 at 6:36pm*

**College Math**

I am really struggling with this Fibonacci number problem. If the greates common factor of "m" and "n" is "r", then the greatest common factor of Fm and Fn is Fr. Show that this is true for m=6 and n=9. I am so confused
*Sunday, October 2, 2011 at 4:07pm*

**College Math**

Could you show me how to do 5z/7 - 5z/8 = 1 The answer is 56/7 But how did they get it ?
*Sunday, October 2, 2011 at 9:28am*

**statistics**

At a certain college, there were 400 science majors, 100 engineering majors, and 600 business majors. If one student was selected at random, the probbility that they are an engineering major is
*Saturday, October 1, 2011 at 10:47am*

**College Physics**

A ball is thrown upward at a speed v0 at an angle of 53° above the horizontal. It reaches a maximum height of 8.2 m. How high would this ball go if it were thrown straight upward at speed v0?
*Friday, September 30, 2011 at 3:06pm*

**College **

Does Harvard University have art & creative writing classes cause I want to become a artist & a creative writer (when writing books, short stories, novels, & poems). I'm just asking. I look on the website but it really confusd me. Please also what is REALLY Harvard ...
*Friday, September 30, 2011 at 2:55pm*

**statistics**

The credit card industry has determined that about 65% of college student ls will be late making a minimum payment when paying their credit card every year atleast once. If 10 randomly selected students who own a credit card is selected what is the mean and standard deviation ...
*Friday, September 30, 2011 at 3:29am*

**math**

You are driving home from college steadily at 95km/hour for 130km. It begins to rain and you slow to 65km/hour. You arrive home after driving 3 hours and 20 minutes. How far is your hometown from college?
*Thursday, September 29, 2011 at 9:07pm*

**College **

Is Harvard is really the best college ? also what high school grades are require to get to Harvard ??? When I be a 9th grader will they prepare me for SAT ???
*Thursday, September 29, 2011 at 5:09pm*

**College Abstract Algebra**

If H is a subgroup of G and K is a normal subgroup of G,prove that HK = KH
*Thursday, September 29, 2011 at 3:59pm*

**College **

My dream is to go to Harvard University. When I grow up I want to become an artist, & creative writer (like writing stories & stuff. Here are some questions I would like to ask you guys. Please answer these questions please I know I'm too young (age 12, 7th grade) but, I ...
*Thursday, September 29, 2011 at 3:01pm*

**College Math**

What is conditional, and identity or a contradiction ? in terms of a linear equation. Please can you give some examples
*Thursday, September 29, 2011 at 1:07pm*

**College Math-**

I hope my questions are not very silly. But here is another one I want to understand. Write an equation in slope-intercept form of the line satisfying the following conditions. through (6,7); perpendicular to x=2 My answer was 7/6(X)+2 But in truth the real answer is only y=7 ...
*Thursday, September 29, 2011 at 12:20pm*

**College Mathematics. 3**

(3t+1)/5=(t+7)/10+(t-5)/10 I solved this question through the linear equation simplification timing both sides by the least common denominator. 5 Once I did the the result was > 3t+1= 2t+14+2t-10 T= 3 However the real answer is t=0 Where am I going wrong? How am I supposed ...
*Thursday, September 29, 2011 at 11:36am*

**College Math**

Another question which is confusing. The position of an object moving in a straight line is give by s=2t^2-3t, where is s in metres and t is the time in seconds the object has been in motion.. how long will it is take the object to move 6 meters? I first used the simplfying ...
*Thursday, September 29, 2011 at 11:28am*

**College Math**

There is a question > Write the slope intercept form of the equation for the line passing through the points (-6,3) and (0,7) Now my answer started with > Slope = 7-3/0-(-6) = Slope = 2/3 Then to find the intercept > Y=mx+c 3= 2/3(-6) + c c= 7 In my opinion this is ...
*Thursday, September 29, 2011 at 11:17am*

**early childhood education**

1)according to the national center for education statistics which of th following is a false statement a)when it comes to grade and homework boys outperform girls in elementary secondary high school college and even graduate school. b)boys are more likely than girls to be ...
*Wednesday, September 28, 2011 at 8:19pm*

**Ready to submit my essay**

Illustration Essay: Successful Student The value of education has really degraded in the past years; some say that college is difficult to cope with because of the stressful lifestyles, and some do not even bother trying. The truth is that college is not that difficult. There ...
*Wednesday, September 28, 2011 at 8:33am*

**college physics**

cost of homework help for college physics
*Tuesday, September 27, 2011 at 10:28pm*

**College physics (simple)**

Two blocks (one on top of the other), each of mass m = 2.4 kg, are pushed along the horizontal surface of a table by a horizontal force P of magnitude 6.8 N, directed to the right. The blocks move together to the right at constant velocity. (a) Find the frictional force ...
*Tuesday, September 27, 2011 at 5:35pm*

**College physics (simple)**

Two blocks (one on top of the other), each of mass m = 2.4 kg, are pushed along the horizontal surface of a table by a horizontal force P of magnitude 6.8 N, directed to the right. The blocks move together to the right at constant velocity. (a) Find the frictional force ...
*Tuesday, September 27, 2011 at 5:35pm*

**college algebra**

Could I please have 1 example of a piecewise-defined function problem, with 2 function pieces and the domain and range of each piece. Thank you
*Tuesday, September 27, 2011 at 3:11pm*

**college math**

please help me write the equation and solve for it. 1).in a basketball game, eric made half as many free throws as dan. if the total number of free throws made by both men was 18, how many free theows did eric make?
*Tuesday, September 27, 2011 at 1:53pm*

**statistics**

at a certain college, there were 700 science majors,100 engineering majors and 500 business majors. if one student was selected at random, the probability that they are an engineering major is?
*Tuesday, September 27, 2011 at 12:15pm*

**Final Draft, English essay**

Hey could you please check this. It is supposed to be an illustrated essay. Is it illustrated enough? _______________ Illustration essay: Successful student The value of education has really fallen in the past years; some say college is hard to cope with and some do not even ...
*Tuesday, September 27, 2011 at 7:51am*

**College Physics**

The roller coaster in Figure P6.36 starts with a velocity of 15.4 m/s. One of the riders is a small girl of mass 30 kg. Find her apparent weight when the roller coaster is at locations B and C. At these two locations, the track is circular with the radii of curvature given in ...
*Monday, September 26, 2011 at 10:50pm*

**College Physics**

A 2.0 m diameter merry-go-round is initially turning with a 4.2 s period. It slows and stops in 22.0 seconds. Before slowing, what is the speed (in m/s) of a child on the rim? How many revolutions does the merry-go-round make as it stops?
*Monday, September 26, 2011 at 3:28pm*

**English essay final draft.**

HEY I FINISHED MY FINAL DRAFT, DONE EDITING TOO. COULD YOU PLEASE CHECK IT AND TELL ME IF THIS ESSAY IS ILLUSTRATIVE ENOUGH? Illustration essay: Successful student The value of education has really fallen in the past years; some say college is hard to cope up with and some do ...
*Monday, September 26, 2011 at 1:22pm*

**College Algebra**

Let g(x) = -2x2 + bx + c be a quadratic function, defined everywhere, where b and c are constants. If x = 1 marks the location of one of the zeros of this quadratic function, and if the y-intercept of this function is at (0, 5), then use this information to name constant b.
*Monday, September 26, 2011 at 9:44am*

**College Algebra**

Let h(12) = -100 for some function h(x), defined everywhere. If the average rate of change of h(x) from x = 12 to x = 20 is 50, then find h(20).
*Monday, September 26, 2011 at 9:44am*

**College Algebra**

Let g(x) = x3 - 12x + 16. Find the location of the local minimum of this function (there is only one such location). Evaluate function g(x) at the x-value of the ordered pair location of this local minimum.
*Monday, September 26, 2011 at 9:44am*

**English**

I AM DONE WITH MY ESSAY : Could some one please read it and tell me if it is correct Illustration essay: A successful student The value of education has really fallen in the past years, some say college is hard to cope up with and some do not even bother trying. The truth is ...
*Monday, September 26, 2011 at 9:16am*

**college Algebra**

Let g(x) = -2x2 + bx + c be a quadratic function, defined everywhere, where b and c are constants. If x = 1 marks the location of one of the zeros of this quadratic function, and if the y-intercept of this function is at (0, 5), then use this information to name constant b.
*Monday, September 26, 2011 at 12:38am*

**College Algebra :( **

Sketch the graph of y=mx for the given values of m. m=3,-2,2/3,-1/4 please help me, I'm so confused!
*Monday, September 26, 2011 at 12:28am*

**College Algebra**

Let h(12) = -100 for some function h(x), defined everywhere. If the average rate of change of h(x) from x = 12 to x = 20 is 50, then find h(20). Type your numerical response in the space provided. Do not type in any of the processes which you utilized to arrive at your response.
*Monday, September 26, 2011 at 12:08am*

**College Algebra 2**

Find the equation of variation in which y varies jointly as x and z and y=8, x=4 and z=2
*Sunday, September 25, 2011 at 11:39pm*

**College Algebra 2**

The speed of train A is 16 mph slower than train B. Train A travels 190 mph in the same time it takes train B to travel 270 miles. Find the speed of each train.
*Sunday, September 25, 2011 at 10:40pm*

**College Algebra 2**

To determine the number of deer in a game preserve, a conservationist catches 810 deer, tags them and lets them loose. Later 684 deer are caught; 171 of them are tagged. How many deer are in the preserve?
*Sunday, September 25, 2011 at 10:32pm*

**College Algebra 2**

To determine the number of deer in a game preserve, a conservationist catches 810 deer, tags them and lets them loose. Later 684 deer are caught; 171 of them are caught. How many deer are in the preserve?
*Sunday, September 25, 2011 at 9:57pm*

**College Algebra 2**

The number of kilograms of water in the human body varies dirctly as the mass of the body. An 84-kg person contains 64-kg of water. How many kg of water is in a 63-kg person?
*Sunday, September 25, 2011 at 9:51pm*

**essay**

can someone critique my short college admission essay and if so how do I submit it
*Sunday, September 25, 2011 at 8:58pm*

**College Algebra 2**

4<2x-16<14
*Sunday, September 25, 2011 at 7:02pm*

**College Algebra**

Matt scored 75 on the calculus midterm. If the final exam counts twice as much as the midterm exam, then for wht range of scores on the final would Matt get an average between 81 and 92?
*Sunday, September 25, 2011 at 7:01pm*

**College Chemistry**

One liter of benzene (C6H6) is completely burned (oxidized) with air. Write a balanced chemical equation to represent this reaction.
*Sunday, September 25, 2011 at 5:57pm*

**English**

Illustration essay: Succesful student In order to be succesful college student must be punctual to class and dedicated to his work. For instance if a student is punctual and comes to class daily : He will be constantly reminded of the upcoming assignments If a student is ...
*Sunday, September 25, 2011 at 8:50am*

**college Algebra**

Let g(x) = x3 - 12x + 16. Find the location of the local minimum of this function (there is only one such location). Evaluate function g(x) at the x-value of the ordered pair location of this local minimum.
*Sunday, September 25, 2011 at 1:50am*

**Pre-Calc**

Can anyone direct me to learn more about polar coordinates. I'm in online college course and really am confused. In high school, I never heard of polar coordinates. Like they say is the following the graph of point (3,15) and show it on polar grid-I don't get it at all...
*Saturday, September 24, 2011 at 4:34pm*

**MATH**

Can someone please HELP me figure this out? According to statistics gathered as part of a research project by a group of statistics students on the college campus, 376 out of the 439 deaths attributed to lightning strikes were male. If all of the names of the deceased were ...
*Saturday, September 24, 2011 at 11:29am*

**College Chemistry**

If 10 mL of 1M NaOH are added to one liter of a buffer that is 0.3 M acetic acid and 0.2 M sodium acetate (Na+CH3COO-), how much does the pH change? The pKa for acetic acid is 4.76.
*Friday, September 23, 2011 at 10:38pm*

**College Chemistry**

What is the pH when 10 mL of 1 M acetic acid is added to pure water so that the final volume is 100 mL? The Ka for acetic acid is 1.74 x 10^(-5)
*Friday, September 23, 2011 at 10:37pm*

**college physics**

The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing indicate. If the coefficient of static friction between a crutch and the ground is 1.21, determine ...
*Thursday, September 22, 2011 at 4:40pm*

**Math Help**

According to statistics gathered as part of a research project by a group of statistics students on the college campus, 376 out of the 439 deaths attributed to lightning strikes were male. If all of the names of the deceased were placed into a drum and one (1) name was ...
*Thursday, September 22, 2011 at 8:22am*

**PROBABILITY**

R. H. Bruskin Associates Market Research found that 40% of Americans do not think that having a college education is important to succeed in the business world. If a random sample of five Americans is s selected, find these probabilities. (a) Exactly two people will agree with...
*Wednesday, September 21, 2011 at 7:15am*

**College Physics**

When searching for gold, measurements of g can be used find regions within the Earth where the density is larger than that of normal soil. Such measurements can also be used to find regions in which the density of the Earth is smaller than normal soil; such regions might ...
*Wednesday, September 21, 2011 at 12:16am*

**college physics**

A certain person's eye measures 24.0 mm from the pupil to retina. (a) If we treat the eye's lens as a thin lens, what is its focal length when the person focuses on a pencil 44.3 cm from the eye? (b) While the person focuses on the pencil, what is the image distance ...
*Monday, September 19, 2011 at 9:05pm*

**statistics**

once again I am not getting this. assume that the population of heights of male college students is normally distibuted with a mean of 69.09 and standard deviation of 4.71. A random sample of 92 heights is obtained. find the mean and standard error of the x distribution. find ...
*Monday, September 19, 2011 at 7:40pm*

**College English**

I need to write a 700 word essay on what my name means. Can I please get some help!!!
*Monday, September 19, 2011 at 7:02pm*

**statistics**

1. Use the following information about a group of college students: Fifty percent are taking Algebra. Sixty percent are taking Biology. Thirty percent are taking both Biology and Algebra. A student from the group is selected at random, calculate the following: a) The ...
*Sunday, September 18, 2011 at 11:58pm*

**College Physics**

The Daytona 500 stock car race is held on a circular track that is approximately 2.25 miles long, and the turns are banked at an angle of 32.5°. It is currently possible for cars to travel through the turns at a speed of about 189 miles per hour. Assuming that these cars ...
*Sunday, September 18, 2011 at 10:37pm*

**statistics**

In a certain college, 55% of the students are women. Suppose, we take a sample of two students. Use a probability tree to find the probability that at least one of the two students is a woman.
*Sunday, September 18, 2011 at 10:18pm*

**HUM/176**

Final Assessment Due 9-18-11 11:59 Arizona time Answer each question below. Answers should be at least 100 words per question. Answers should be in your own words. Any direct quotes must be properly identified. Each answer should include at least one citation for a credible, ...
*Sunday, September 18, 2011 at 10:12pm*

**College Algebra**

a hardware store owner chooses to enclose an 800 square foot rectangular area in front of her store so that one of the sides of the store will be used as one of the four sides of the fence. if the two sides that come out from the store front cost $3 per running foot and the ...
*Sunday, September 18, 2011 at 2:44pm*

**College Algebra**

If f(x) is increasing on the interval from x = 2 to x = 10, and if g(x) is decreasing on the interval from x = 2 to x = 10, then the function (f + g)(x) will be constant on the interval from x = 2 to x = 10. true or false
*Sunday, September 18, 2011 at 11:47am*

**college algebra **

The average rate of change of g(x) = 2^(x-1) from x = 2 to x = 6 is 7.5.
*Sunday, September 18, 2011 at 11:38am*

**college algebra **

The average rate of change of g(x) = 2x-1 from x = 2 to x = 6 is 7.5. true or false
*Sunday, September 18, 2011 at 11:11am*

**college algebra **

If f(x) is increasing on the interval from x = 2 to x = 10, and if g(x) is decreasing on the interval from x = 2 to x = 10, then the function (f + g)(x) will be constant on the interval from x = 2 to x = 10. true or false
*Sunday, September 18, 2011 at 10:42am*

**College Physics**

Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that the fastest he can ...
*Sunday, September 18, 2011 at 12:00am*

**statistics**

Pleas HeLp!!!!!!!!!! A random sample of the test scores of 100 applicants for college entry at a large junior college showed a mean score of 72.6. Determine a 99%, 95%, and 90% confidence interval for the m mean score of all applicants at the junior college. Assume the ...
*Saturday, September 17, 2011 at 10:00pm*

**college physics**

A 4.5 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 5.4 cm away from the lens. The lens forms an inverted image of the insect which is 0.9 cm long on a screen behind the lens. a. How far behind the lens is the screen? b. What is the lens' ...
*Saturday, September 17, 2011 at 9:05pm*

**College Math**

r^2+10r-23=0 I used the quadratic formula and I got a -5+2√12 However the real answer is -5+4√3 What am I doing wrong?
*Saturday, September 17, 2011 at 2:03pm*

**CRT 205 **

Can someone review this and let me know if it is acceptable?? This class was so hard and it has been all i can do to pass it! Here is the article i chose Addiction Is a Choice, Not a Disease Addiction , 2009 Content Level = Intermediate Dale Netherton, "It's Not ...
*Saturday, September 17, 2011 at 1:04am*

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