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November 24, 2014

Posts by Anna


Total # Posts: 2,030

algebra 2 ap
Jason uses his car for his job. He is allowed to depreciate the car 7% per year. IF the car was worth $23,000 new, in about how many years will the car be worth $3,000?
April 28, 2013

Math
What are three distinct numeric approaches for calculating the product 24x32?
April 25, 2013

Math
Shaun rides 8 kilo meters west from his house to school. After school he rides 6 kilo meters north to Mario's house. What is the distance from Mario's house to Shaun's house measured in a straight line?
April 22, 2013

chemistry/Ksp
It is more accurate to report a single value OR a range of values for Ksp?
April 22, 2013

Math
Mr.Brown is building a slide for his kids. The ladder is 3 meters tall ad the slide is 5 meters long. What is the distance between the ladder and the bottom of the slide?
April 22, 2013

Chemistry
Estimate the equilibrium constant for the weak acid HCN, if a 4.68×10-3 M aqueous solution of HCN has a [H+] 0.00000151 M (make an exact calculation assuming that initial concentration is not equal to the equilibrium concentration). HCN = CN- + H+
April 17, 2013

Chemistry
You have 1liter buffer solution containing 0.1 M HF and 0.05 M NaF. Now you add 0.055 moles of HCl to it. A) Do you think that the solution still retains it's effectiveness? B) Explain rationally how you came to the conclusion. I do not think that the solution would retain...
April 16, 2013

chemistry
how many grams of oxygen are in 175 g of C5H10O5
April 16, 2013

Chemistry
Consider the equilibrium 2NOCl (g) <---> 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations in the "new" equilibrium ...
April 13, 2013

Chemistry
Which of the following is/are present in a reagent bottle labeled 1.0 M H2SO4? I. H2SO4 II. HSO4- III. SO4-2 A. I only B. I and II C. II and III D. I, II, and III
April 13, 2013

Chemistry
Consider the equilibrium 2NO (g) <---> 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations in the "new" equilibrium in ...
April 12, 2013

math
1600
April 11, 2013

physics
The GoodYear blimp is kept aloft by helium gas which fills a volume of 4559m^3. It can carry a maximum load of 1176kg. How much more mass could the blimp carry if it were filled with hydrogen? Take the density of helium gas to be 0.160kg/m^3 and that of hydrogen to be 0.081kg/m^3
April 10, 2013

Probabilities
In a cookie jar, there are 6 chocolate cookies and 8 oatmeal cookies. I take out the cookies one at a time and proceed to eat them. The probability that the 7th cookie that I eat is a chocolate cookie is a/b, where a and b are positive coprime integers. What is the value of a+b?
April 9, 2013

Math
Bought 3 shirts & 2 pair pants for $85 and my friend bought 2 shirts & 5 pants for $130, and the shirts are the same price, what is the price of each shirt?
April 8, 2013

Physics
1a)if accelerating voltage is doubled in a CRT the deflection will change from "d" to ____? b) if magnetic field strength is doubled, deflection in a CRT will change from "d" to ___?
April 7, 2013

Probabilities
A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is a person who will ...
April 1, 2013

Combinations
Anna was opening a new restaurant, so she went to the sign store to get letters to make a sign to hang above the storefront. When she got to the sign store, the only letters they had in stock were two copies of the letter 'X,' two copies of the letter 'E,' and ...
April 1, 2013

Probabilities
A bag contains 150 balls numbered 1 through 150 . Three balls are drawn and placed on the table. The probability that the balls were drawn in increasing order can be expressed as a/b where a and are coprime positive integers. What is the value of a+b
April 1, 2013

quiz
We are given 7 squares of side lengths 1, 2, 2, 2, 3, 4, 5. They can be fitted to form a rectangle, with no overlap or gaps in-between. What is the perimeter of the rectangle?
April 1, 2013

Maths
Let f(x)=x^2 -1 . How many distinct real roots are there to f(f(f(x)))
April 1, 2013

quiz
The vertices of a cube are labeled with the numbers 0,1,2,3,4,5,6 and 7, such that no two vertices are labeled with the same number. The sum of any 2 numbers on an edge is prime. What is the maximum sum of the 4 numbers on a face?
April 1, 2013

Math
What is the answer to the equation (0.3.)²-(0.2)²•(0.5)?
March 31, 2013

Trig
Use a half-angle identity to find the exact value for sec(x/2) if sinx = -12/13 ; 3pi/2 < x < 2pi
March 28, 2013

algebra
Determine whether the following is a polynomial. 937g2h3 - 238gh2 + 54gh
March 28, 2013

algebra
The following polynomial is prime. 2q² + 9q + 1
March 28, 2013

PHYSICS - formula?
Here is one of my questions from my physics study. It tells me the answer (35 J), but how do I find that answer? I would appreciate a formula or step by step calculation. Thanks! :) A 30 kg kid on rollerskates is moving 1 m/s. His brother pushes him with a force of 5 N. What ...
March 26, 2013

Life orientation
1. Pollution - comes from factories, cars, etc. Think... try looking in your lesson or book and see if they gave examples of environmental hazards.
March 26, 2013

science
Those blue crystals are copper sulfate crystals with the formula CuSO4*5H20. It has
March 26, 2013

science
formula: CuSO4*5H20
March 26, 2013

economics
Yes, only you can answer. But just think, did you ever buy something because you saw it on tv? Or maybe you were on the computer and an ad popped up for a new video game that is coming out in stores soon. Maybe some new invention/product was featured in the newspaper. Do any ...
March 26, 2013

Psychology
How do I find reliable sites for a research project, when I can't use journal articles published online, or personal websites?
March 23, 2013

Math
Find the area of a circular segment of a circle of radius 7cm that sub tends a central angle of 35 degrees?
March 22, 2013

CHEMISTRY
How do you get the concentration with buret readings? What would the concentration of HC2H3O2 (M) be? For example, Molarity of the NaOH solution: 0.2619 M Final buret reading: 31.10 ml Initial buret reading: 0 Volume of NaOH solution: 31.0 ml concentration of HC2H3O2 (M...
March 20, 2013

Maths
498
March 20, 2013

Maths
What is the highest power of 3 that divides 1000! (1000 factorial)
March 20, 2013

Cultural Anthrolpogy
Anthropological research has demonstrated that supernatural beings and forces exist in what percentage of the world's cultures? A. 50 percent B. 80 percent C. 95 percent D. 100 percent My answer: C
March 18, 2013

Cultural Anthropology
Ms Sue, are my answers correct pls? Thanks.
March 18, 2013

Cultural Anthropology
Sorry. That is a sodality member. Also: Supernatural connections to political leadership are most closely associated with: A. bands. B. tribes. C. chiefdoms. D. states. I chose C. 2/ It is often difficult to identify who the leader is in a foraging society because: A. you can...
March 18, 2013

Cultural Anthropology
Hello Ms Sue. How are you? I am actually reading now. However, I am more leaning to A. Is this correct? Thank you. Anna
March 18, 2013

Cultural Anthropology
In a band society, who would most likely be responsible for punishing a murderer
March 18, 2013

english
hey everybody!I will make a presentation in the class few days later.Anyone watched The others(2001)?I got a question.Who is the woman in distress in the film and why is she in distress? thanks..
March 15, 2013

PHYSICS
The answer is 24696 J.
March 14, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with this. All I need is a formula, please. :)Thank you! Here it is: A skier with a mass of 60.0 kg pushes...
March 14, 2013

physics
At a fabrication plant, a hot metal forging has a mass of 74 kg and a specific heat capacity of 430 J/(kg·C°). To harden it, the forging is quenched by immersion in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 3000 J/(kg·C&...
March 13, 2013

Physics
At a fabrication plant, a hot metal forging has a mass of 74 kg and a specific heat capacity of 430 J/(kg·C°). To harden it, the forging is quenched by immersion in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 3000 J/(kg·C&...
March 13, 2013

Physics
A rod made from a particular alloy is heated from 22.0°C to the boiling point of water. Its length increases by 8.15 10-4m. The rod is then cooled from 22.0°C to the freezing point of water. By how much does the rod shrink?
March 13, 2013

Math
How many degrees,in total,does the minute hand turn in one day ?
March 12, 2013

Maths
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example, a value of ‘32...
March 12, 2013

CHEMISTRY HELP!!
When BaCl2 reacts with Na3PO4, Ba3(PO4)2 and NaCl are formed. Balance the equation and write the coefficients in the blanks.
March 12, 2013

chemistry
61.54 g
March 9, 2013

Chemisty
Fluorine gas can react with ammonia gas to produce dinitrogen tetrafluoride gas and hydrogen fluoride gas. This reaction is described by the following balanced equation: 5 F2 (g) + 2 NH3 (g) N2F4 (g) + 6 HF (g) What mass of hydrogen fluoride gas is produced from 135 g of ...
March 8, 2013

Check my physics
Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic energy possessed by ...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #8: A 20 kg block of ice slides without friction down a long hill. The start ...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #7: A 30 kg ball is launched at an angle of 15 degrees and is moving 20 m/s ...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #6: A 30 kg kid on rollerskates is moving 1 m/s. His brother pushes him with a...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #5: A roller coaster car starts at Point A at a height of 100 m. When it ...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #4: What is the increase in thermal energy to a 2000 kg bus and its ...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #3: A 30 kg kid on rollerskates is being pushed by his mom with a force of 10 ...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #2: Suppose the spring in a pinball machine has a spring contant of k=400 N/m...
March 7, 2013

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top of a snow covered ...
March 7, 2013

Exam: 986109RR - CHOOSING YOUR BUSINESS
Um, the point of this website is not to give out ABCD answers. It's to help guide you. But we can't even help you do that since you posted so many answers. Sorry, can't help.
March 7, 2013

algebra
If the equation were x= 0.03x - 58.91, x would equal -60.7320.
March 7, 2013

algebra
What are you asking?
March 7, 2013

Cultural Anthrolpogy
The field of computer technology could be used to illustrate that culture is
March 6, 2013

Physics
For launching a satellite into orbit around earth, would the proper conservation of energy formula be: Epi + Eki + O work = Epf + Ekf? Would work = 0 for launching a satellite? And, would Epi = -Gm1m2/radius of earth or would it just equal 0 (because we usually set Ep on earth...
February 28, 2013

Chem
Calculate the pH of a .50 M solution of NaCl.
February 27, 2013

Physics
The electric field strength @ distance = 1.0 m from a point charge is 4.0 x 10^4 N/C. What is the Electric field strength @ 2.0 m from the same charge?
February 27, 2013

Physics
Thanks!
February 27, 2013

Physics
On the moon's surface, the force of gravity exerted by the moon on a camera is 2.4 N. What is the force of gravity exerted by the moon on the camera when it is in orbit with a radius = to twice the moon's radius?
February 27, 2013

Maths A
Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 inclusive. o The next ten (10) numbers must lie in the range from 30 to 70 inclusive. o The remaining eight (8) numbers must lie in the range from 50 to 95...
February 25, 2013

Maths A
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example, a value of ‘32...
February 25, 2013

math
90
February 25, 2013

maths a
The Bough and Bud Company combined an insect spray with a growth hormone to produce the MOP (More Oranges Production) Treatment, which was expected to increase the number of oranges produced by each tree. The data below shows the number of oranges produced by each tree in two ...
February 25, 2013

MATHS A
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example, a value of ‘32...
February 25, 2013

Maths A
For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 ...
February 25, 2013

Maths
For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 ...
February 25, 2013

Math f(x)
given f(x)= x^2+x and g(x)=2x+1 determine f[g(x)] i dont even know where to start with this question help is much needed
February 22, 2013

chemistry
A factory that specializes in the refinement of transition metals such as titanium was on fire. Provide kinetic-based arguments (concentration and temperature) explaining why water would be dangerous for the firefighters.
February 18, 2013

Chemistry
The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 21.3g of the compound? Please help. I am SO confused on all of this!!
February 16, 2013

Math/Accounts
Estimate the cost of ending inventory based on the retail method using the following information: Cost Retail Beginning Inventory $ 600,000 $ 800,000 Purchases $ 450,000 $ 600,000 Net Sales $1,000,000 A. $150,000 B. $262,500 C. $300,000 D. $750,000
February 13, 2013

Business Analysis
Mahalyk's Water Fun Shoppe specializes in jet skis. Mahalyk's inventory records showed the following for the past year. Purchase Date Number of Jet Skis Cost Per Jet Ski February 10 30 $4,000 May 12 80 $3,000 June 15 20 $3,500 July 20 15 $2,500 Use the FIFO method to ...
February 13, 2013

Business Analysis
A firm has the following inventory information for the first quarter: 01/01 Beginning Inventory 50 units @ $5 01/15 Purchases 80 units @ $5.50 02/15 Purchases 60 units @ $5.25 02/15 Purchases 40 units @ $5.75 Sales 170 units @ $10 Total operating expenses $500 What is ending ...
February 13, 2013

Math
How many distinct numbers greater and equal to 100 and smaller than 3000 can be formed using digits 0,1,2,3,4, without repetition of digits?
February 12, 2013

chemistry
12.50g of an unknown compound (i=2) are dissolved in 50.00g of water and this solution freezes at –7.5 degrees C. What is the molar mass of this compound?
February 12, 2013

Chemistry
its concentration, so it should be mol/L
February 10, 2013

Chemistry
True, however, I keep getting a negative value which is not possible.
February 10, 2013

Chemistry
Find the initial concentration of NO2 if the concentration after 2.00 min is 0.113. k = 0.331 1/(M * s) 2 NO2 (g) + N2 (g) --> 2 N2O (g) + O2 (g)
February 10, 2013

Psychology
Dr. Gillian explained that research has identified over 25,000 genes which are responsible for the genetic information which progresses from generation to generation. These genes are:
February 6, 2013

Organic chemistry
We conducted a diels-Alder reaction of cyclopentadiene with Maleic Anhydride experiment. Though I was wondering why we added ligroin to the maleic anhydride and ethyl acetate. I know ligroin can be used as a solvent, but I thought that ethyl acetate was the solvent in this ...
February 6, 2013

Chemistry
If it had gone down then how would we calculate it
February 2, 2013

Chemistry
Freezing point of pure water = -2, Freezing point of Unknown solution = -1 Mass of unknown in 50g of water = 1.9964g. Calculate the delta T for the solution of the unknown solid and determine the molecular weight of the unknown solid.
February 2, 2013

English
Where reading the poem "LEGAL ALIEN" by Pat Mora . We have to find the rhythm,meter, and assonance . I cant fimd any of that in the poem . Please tell me what each one of them are in the poem .. Reply ASAP please
February 2, 2013

general chemistry
A reaction involves fictional reagents A & B is begun with the inital concentration of 0.05M A and 0.01M B. The reaction reaches completion in 16 seconds. What is the initial rate of the reaction in respect to A? and what is the order in respect to B
January 30, 2013

Math
The expression ax^3+2x^2+cx+1 is 5x^3-3 greater than 3x^3+bx^2+d-7x. Find a, b, c, and d.
January 29, 2013

Chemistry
An aqueous KNO3 solution is made using 73.4g of KNO3 diluted to a total solution volume of 1.86 L. Calculate the molarity of the solution. (Assume a density of 1.05 g/ml for the solution.)
January 29, 2013

elementary math
thank you..
January 25, 2013

elementary math
i did use my poof to prove. im not sure im doing right. here is exercises: 'Suppose a,b,c are integers if a|b and a|c, then a|(b+c).' my answer: Proof. Suppose a|b ans a|c. By Definition of divisibility. we know a|b means there is an integer x with b= ax. Likewise, a|c...
January 25, 2013

Precalculus
How do you solve this problem: sin(90* - x) ----------------- cot^2(90* - x) + 1 The * is a degree symbol!! I haven't seen any problems with degrees in it, usually it's only a variable! If anyone could give me guidelines or show me where to start, I'd really ...
January 23, 2013

physics
Calculate the speed of a proton having a kinetic energy of 1.00 × 10 −19 J and a mass of 1.673 × 10 −27 kg. Answer in units of m/s
January 22, 2013

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