Monday

April 20, 2015

April 20, 2015

Total # Posts: 2,099

**Stats**

I. Use Chebyshev’s theorem to find what percent of the values will fall between 183 and 227 for a data set with a mean of 205 and standard deviation of 11. II. Use the Empirical Rule to find what two values 99.7% of the data will fall between for a data set with a mean of...
*October 15, 2011*

**Stats.....plz help me.....**

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25
*October 14, 2011*

**Math**

How are z scores and the "empirical rule" related?
*October 13, 2011*

**Math Help**

looks correct to me
*October 13, 2011*

**Stats**

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25
*October 13, 2011*

**Can someone help me please?**

Statistics confuses me....thank you for your help :)
*October 13, 2011*

**Can someone help me please?**

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
*October 13, 2011*

**algebra**

3/4 times 11/9 times 90 times 21/90
*October 12, 2011*

**Help plz!! Math....**

hmmmm....this is so confusing for me....
*October 12, 2011*

**Help plz!! Math....**

I apologize...thank you....so is it A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0
*October 12, 2011*

**misin ideas**

regular aerobicise an individual more endurance tha show cause and effect
*October 11, 2011*

**Chemistry **

When a 5.50g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee cup calorimeter, the temperature of rises from 21.6 degrees C to 37.8 degrees C. Calculate Change of heat for the reaction in kJ (also in kJ/mol NaOH) for the solution process. Assume the ...
*October 10, 2011*

**algebra**

Find the length of the golden rectangle whose width is 14.72
*October 9, 2011*

**Fibonacci numbers**

I have been working on this question all day and can not figure out what to do. The question says according to the Quadratic Formula, the solutions of x^2-x-1=0 I know the positive solution is the golden rule ratio and the negative solution is the conjugate of 0(with a slash ...
*October 9, 2011*

**algebra - reply to answer**

why is this a poor model for hitting a baseball? y = -0.002x^2 + 0.879x + 3.981 I know it gets hit at approx. 4 feet high. The -a gives the right shape like a hill. There's a -4.48 and 443.95 zero, which can be hit for distance. The max is (219.75, 100) so that seems ...
*October 9, 2011*

**algebra Please Help**

New question: A baseball was 2.74 feet above ground when it was hit. It reached a max. height of 116.3ft when it was approx 215.3 ft away from where he hit the ball. The ball lands after travelling a ground distance of approx 433.1 ft. Find an equation of form y = A(x-h)^2 + k...
*October 9, 2011*

**algebra**

why is this a poor model for hitting a baseball? y = -0.002x^2 + 0.879x + 3.981 I know it gets hit at approx. 4 feet high. The -a gives the right shape like a hill. There's a -4.48 and 443.95 zero, which can be hit for distance. The max is (219.75, 100) so that seems ...
*October 9, 2011*

**algebra**

Suppose the ball was 2.74 feet above ground when it was hit. It reached a max. height of 116.3ft when it was approx 215.3 ft away from where he hit the ball. The ball lands after travelling a ground distance of approx 433.1 ft. -- find an equation in form of y=C(x-z1)(x-z2) ...
*October 8, 2011*

**Microeconomics**

Baseballs cost $5 and baseball gloves cost $20. Assume you have $100 total to spend on these items. Construct a table similar to the one on page 158. What is the point, based on the Equimarginal Rule, that has equal marginal benefit (or the closest) for the two purchases?
*October 8, 2011*

**Biology**

Can DNA control how many teeth we will have?
*October 6, 2011*

**Fibonacci Numbers**

Thank you Jennifer! I just figured out where I went wrong in wording the problem. a= 2x8=16 b=2x15=30 c=9+25=34 16^2+30^2=34^2 256+900=1156 1156=1156 Thank you for helping to guide me in the right direction. One more problem to go by Friday...I just may be calling on you!
*October 3, 2011*

**Fibonacci Numbers**

I think it is the fibonacci numbers and the wording of the word problem. I thought I had to add 4 and 2 together to get the 6 and then square it. I am just confused. Thanks
*October 3, 2011*

**Fibonacci Numbers**

This is not a test question, but I did not know what the appropriate topic for my question is. If I used the terms 2, 3, 4, 8 consecutive terms of the Fibonacci sequence. "a" is the first and fourth terms and "b" is twice the product of the second and third...
*October 3, 2011*

**biology**

Hi there! I have this question for my bio/genetics homework, and I can't seem to figure it out. It reads, "A true-breeding red snapdragon is crossed to a true-breeding white snapdragon. The F1 progeny are all red. When the F1 is selfed, the following F2 progeny are ...
*October 3, 2011*

**Fibonacci numbers**

I have three problems to answer dealing with Fibonacci numbers. I understand the first two, but would like for reassurrance that they are correct and lost on the last one and could use some help. Thank you. 1. Fibonacci numbers can not be used more than once. Find sums for ...
*October 2, 2011*

**statistics**

For a distribution in which the mean is 100 and the standard deviation is 12, find the following: the percentile of a score of 106.
*September 30, 2011*

**PHYSICS! HELP PLEASE**

start the shopper at (0,0) After pushing the cart 43 m south, he's now at (0, -43) After turning west and pushing the cart 15 m, he's now at (-15, -43) Now he has to turn 90 degrees again. . . he will then be going either north or south. . . south will result in the ...
*September 27, 2011*

**economics**

Looks right to me!
*September 26, 2011*

**Science**

A 73 kg student traveling in acar with a constant velocity has a kinetic energy of 1.3 x 10^4 J. What is the speedometer reading of the car in km/h?
*September 21, 2011*

**business law**

what is the gist of proximate cause? why do courts struggle with its concept?
*September 18, 2011*

**algebra**

p^2+p+4=0
*September 16, 2011*

**physics**

a ball is thrown up with an initial velocity 20m/s. using g=10m/s2, a) what's the maximum height it can reach. b) what is the magnitude and direction of the ball's velocity 1 second after it is thrown. c) what is the magnitude and direction of the ball's velocity 3...
*September 12, 2011*

**nursing evidence**

_ _ _ _ _ _ _ _ _ 1. Information used to conduct our lives _ _ _ _ _ _ _ _ _ 2. To solve a problem by collecting the necessary pieces of information and putting them together _ _ _ _ _ AND _ _ _ _ _ 3. Try several approaches until one works _ _ _ _ _ _ _ _ _ 4. Do what feels ...
*September 12, 2011*

**Chemistry**

It still doesnt make aense because the answer comes out to 240 liters.
*September 11, 2011*

**Chemistry**

I still do not understand.
*September 11, 2011*

**Chemistry**

Calculate the amount of 6 M nitric acid you need to add to fully react with .5 grams of copper and add a 20 percent excess.
*September 11, 2011*

**Trigonometry**

In a right triangle ABC, C = 90°, B = 38° 35' and a = 6.434 mi. Solve for all the missing parts using the given information. (Round each answer to three decimal places for sides and to two decimal places for angle.)
*September 9, 2011*

**Chemistry**

Never mind, I figured it out
*September 8, 2011*

**Chemistry**

A 41 g piece of ice at 0.0 degree Celsius is added to a sample of water at 8.6 degree Celsius. All of the ice melts and the temperature of the water decreases to 0.0 degree Celsius. How many grams of water were in the sample?
*September 8, 2011*

**chemistry**

thought it asked for school, why does it matter anyways
*September 6, 2011*

**Cypress**

Suggest any limitations to the use of recrystallization as a purification method for a solid.
*September 6, 2011*

**physics**

I'm suppose to draw velocity time and acceleration time graph for a rocket that is launched vertically into the air and falls back down to its initial height. We are to assume that x axis is up. So would I draw an curved figure like a downward parabola or a straight ...
*September 5, 2011*

**Chemistry**

The label on a 1-pint bottle of mineral water lists the following components. If the density is the same as pure water and you drink 3 bottles of water in one day, how many milligrams of each component will you obtain? calcium 28 ppm
*September 5, 2011*

**Chemistry**

In the manufacturing of computer chips, cylinders of silicon are cut into thin wafers that are 2.80 inches in diameter and have a mass of 2.00g of silicon. How thick (mm) is each wafer if silicon has a density of 2.33g/cm^3? (The volume of a cylinder is V=(pi)r^{2}h.)
*September 5, 2011*

**chemistry**

nevermind, I just figured it out
*September 4, 2011*

**chemistry**

Suppose you have two 100-{\rm mL} graduated cylinders. In each cylinder there is 58.5mL of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of its own cylinder, ...
*September 4, 2011*

**Chemistry**

In the explosion of a hydrogen filled balloon, 0.50 g of hydrogen reacted with 4.0 g of oxygen to form how many grams of water vapor? (water vapor is the only product)
*September 4, 2011*

**Algebra**

A car can average 140 miles on 5 gallons of gasoline. Write an equation for the distance "d" in miles the car can tavel on "g" gallons of gas?
*September 1, 2011*

**algebra**

3/11 minutes
*September 1, 2011*

**math**

keith scored 75,86,79,91 what score must he recieve on on the fifth test to have a mean of 85 ?
*August 30, 2011*

**Physics**

You are on a boat heading out to sea. The boat is going 5m/s toward a buoy (the origin in your chosen frame of reference) that is 300 meters away. How long will it take to be 500 meters beyond the buoy?
*August 28, 2011*

**math**

3. Indicate whether each of the given statements could apply to a data set consisting of 1,000 values that are all different. a. The 29th percentile is greater than the 30th percentile. (True or False) b. The median is greater than the first quartile. (True or False) c. The ...
*August 13, 2011*

**statistics**

how to do the problem? I'm lost
*August 13, 2011*

**Macroeconomics**

. Application 3 to chapter 15 (page 340) suggests increased health care expenditures will crowd out other expenditures. What component of GDP do you think will suffer? Using that same argument, Nebraska has debated casino gambling several times. Proponents say the additional ...
*August 4, 2011*

**Maths**

Find the gradient of the line joining the points (5,2) and (6,3)
*August 2, 2011*

**math.**

A theater purchases $500 worth of Sticky Bears and chocolate bombs. Each bag of Sticky Bears costs $1.50 and each bag of Chocolate Bombs costs $1.00. If a total of 400 bags of candy were purchased, how many bags of Chocolate Bombs did the theater buy?
*July 31, 2011*

**Statistics **

Twenty (20) students randomly assigned to an experimental group are studying for a test while listening to classical music. Thirty (30) students randomly assigned to a control group are studying for the same test in complete silence. Both groups take the test after studying ...
*July 31, 2011*

**comp/155 week 4 assignment**

need help
*July 29, 2011*

**MATH**

A parking lot has 5 spots remaining and 5 different cars in line waiting to be parked. If one of the cars is too big to fit in the two outermost spots, in how many different ways can the five cars be arranged?
*July 27, 2011*

**math**

solve by the substitution method 5x+7y=6 -6x+y=21
*July 26, 2011*

**Hum/205 college level**

OK, I fixed it. The history of the Western Art is a steeped in religious symbolism; but all art is in one way or another, an extension of the religious urge in humanity. However to some westerners it is often difficult to leave the comfort domain of a familiar religious ...
*July 24, 2011*

**Hum/205 college level**

It saying there are no Run on sentence.
*July 24, 2011*

**Hum/205 college level**

can someone please look over this and tell me what you think?? thanks! The history of the Western Art is a steeped in religious symbolism; but all art is in one way or another, an extension of the religious urge in humanity. However to some westerners it is often difficult to ...
*July 24, 2011*

**Philosophy**

Our text discusses the challenge relativism presents to various ethical and religious viewpoints. Consider a specific moral question which might make it difficult to accept the relativist's response. State the moral issue involved, and provide an explanation as to why you ...
*July 24, 2011*

**math**

When m is divided by 7, the remainder is 2. What is the remainder when 4m is divided by 7? Please give me an explanation and not just the answer! Thankss:)
*July 20, 2011*

**Physics**

Your whole family has taken showers before you, dropping the temperature in the water heater to 18 degrees Celsius. If the water heater holds 150 kg of water, how much energy will it take to bring it to 50 degrees Celsius? If the energy is supplied by a 5 kW electric heating ...
*July 14, 2011*

**College math 115**

I need help with my assignment how much will it be to have someone help me with it it is due by tomorrow?
*July 8, 2011*

**english, poetry meanings**

using "a,b,c,d,e,f,g" notation, explain the ryme schem of "let me not to the marriage of true minds.
*July 2, 2011*

**Intermediate Algebra**

for the following equation, state the value of the discriminate and then describe the nature of the solutions, from the following statements. -20x^2-5x+3=0
*June 26, 2011*

**Physics**

You throw a ball horizontally off of a building with a horizontal velocity of 5 m/s. What's the ball horizontal velocity 8 seconds later? How high should the building be if you want the ball to fall for a total of 12 seconds?
*June 21, 2011*

**Physics**

If a car travel at an average speed of 80 km per hr for 20 min, and then slowed down to an average speed of 50 km per hr over the next 15 min. How far would it travel in total?
*June 21, 2011*

**grammar**

Although the abscess was incised and drained in the emergency room and cultures were obtained, which grew coag-positive staphylococcus. which of the below holds good for the above sentence. 1.This is a run-on that needs a semicolon after time. 2. This is a run-on that needs to...
*June 15, 2011*

**Geometry**

152.75
*May 25, 2011*

**9th grade integrated algebra**

tan[32degrees]=y/25 .6248693519=y/25 15.6
*May 22, 2011*

**4th grade math**

what is the next number in the pattern 5,3,7,5,9,7,11?
*May 19, 2011*

**Algebra**

Thanks!! for the help
*May 17, 2011*

**Algebra**

The point (-1,0) lies on a circle whose center is at (-6,5). Find an equation of this circle
*May 17, 2011*

**Algebra**

Thanks
*May 17, 2011*

**Biology**

The half life of carbon 14 is 5700 years. If the carbon 14 level measured in a fossilized bone has only 1/4 of the original amount, how old in the bone?
*May 16, 2011*

**Trig**

Consider a triangle ABC like the one below. Suppose that A=45 degress, B=34 degress, and a= 70. Solve the triangle. Round your answers to the nearest tenth.
*May 15, 2011*

**Algebra**

I have a parabola that I have to write as an equation I found the vertex as (-3,-2) and the following points (-4,-1)(-2,-1),(-5,2),(-1,2). I can't seem to come up with the correct equation. I'm using the formula y=a(h-k)^2+k but I'm not doing something right. Can ...
*May 15, 2011*

**Trig**

Yeah I was looking at that, thanks for clarifing
*May 15, 2011*

**Trig**

thanks for the help
*May 15, 2011*

**Trig**

Rewrite cos(tan^-1(v)) as an algebraic expression in v. Can someone help me with this problem? Thanks
*May 15, 2011*

**Accounting**

The SOO Company has machinery that it acquired a number of years ago at a cost of $812,000. As of December 31, 2012 the company has recorded life-to-date depreciation in the amount of $332,900. Because of changes in their manufacturing processes, the equipment does not ...
*May 2, 2011*

**English 102**

I wanted to make sure that it all made sense. before I turned it in.
*April 29, 2011*

**English 102**

Can someone give me feedback on this please. Introduction Is same-sex marriage going to create issues in our society? Same-sex marriages will most likely produce issues in many political agendas. Religious leadership of Abrahamic faith everywhere will also be confrontational ...
*April 29, 2011*

**social studies**

Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom"?
*April 27, 2011*

**Algebra**

A lot is in the shape of a right triangle. The shorter leg measures 90 meters. The hypotenuse is 30 meters longer than the length of the longer leg. How long is the longer leg?
*April 22, 2011*

**drawing**

Does anyone know for the work titled Blind MAn by William H. Johnson know what materials he used would it by tempura and printing paper? Also Does the artist use symmetrical or asymmetrical balance?
*April 22, 2011*

**statistics**

What is the critical value for 0.04, left tailed test? I dont know what to put as the %?! I also dont understand what to look up in the E table for the value of Z?! Thanks
*April 22, 2011*

**Stat**

the mean of adult men is 172 pounds with a standard deviation of 29 pounds. ask 20 men thier weight and use excel to calculate the mean. test the hypothesis that the mean is not 172 pounds at the .10 significance level. and how many men should be sampled if you want to be 98% ...
*April 21, 2011*

**Math**

The rate of change of sales volume is the derivative of S(t) S'(t) = dS/dt = 20,000 * -0.6 * e^(-0.6*t) Let t = 1, and find the value of S'(1)
*April 19, 2011*

**statistics**

Develop the estimated regression equation to predict the city score, given the Recession Resistance rating alone
*April 18, 2011*

**Chemistry**

If 100 grams of NI3 is detonated, calculate the Gram of N2 and I2 formed.
*April 13, 2011*

**Chemistry**

What is the mass of S2Cl2 if 342 grams of S8 is reacted with an excess of Cl2?
*April 13, 2011*

**Math**

This seems like an economics question to me.. If you want to find the value for the future? You do $2000 x (1.09)^ 7 put this into your calculator exactly as I have it here to get your answer.
*April 13, 2011*

**Economics**

In the long run, what effect will a decrease in aggregate demand have on real output?
*April 13, 2011*

**Statistics 103**

This is one of the questions that is asked in the back of the fifth edition of elementary statistics book. I am not sure of the answer, the number of the problem is an even number. Meaning that I cannot see the the answer in the back of the book:( So I was wondering if anyone ...
*April 13, 2011*

**Statistics 103**

Why do most of the sample means differ somewhat from the population mean? What is this difference called?
*April 13, 2011*