Sunday
November 23, 2014

Posts by Andrew


Total # Posts: 988

math
Is the answer 18 students?
November 18, 2014

math
An art teacher has 1 1/2 pounds of red clay and 3/4 pound of yellow clay. The teacher mixes the red clay and yellow clay together. Each student in the class needs 1/8 pound of the clay mixture to finish the assigned art project for the class. How many students can get enough ...
November 18, 2014

Thank Jiskha tutors
I really appreciate all that you tutors do for us, I know we may be a bit demanding sometimes XD but we really love how you guys are always there to help us out. Coming from experience, I've had some past teachers that aren't as willing to help us when we do not ...
November 16, 2014

history essay please help!
Nevermind I got it but thanks!!!
November 14, 2014

history essay please help!
The goal of the essay is to tell what caused a skyrocketing population from 100 years ago to now. Well, I don't think I ended the essay good, can you help me end it? How about this: Those are just a few of the reasons, but modern technology has certainly done a role in the...
November 14, 2014

history essay please help!
Population growth is just how many people compared from 100 years ago to now. That's what I think it is.
November 14, 2014

history essay please help!
How does the growth of the world's population today compare with its growth 100 years ago? Explain why the changes have taken place. My essay: Today's world population growth compared to the population growth 100 years ago is a big, big difference. The population has ...
November 14, 2014

Math
Maggie makes some fruit punch. She mixes 2 1/2 quarts of grape juice with 1 1/2 quarts of orange juice. One quart of grape juice costs $1 less than one quart of orange juice. She finds that the total cost of making the fruit punch is $12.50. Calculate the cost of each quart of...
November 4, 2014

Chemistry
In the combustion of natural gas according to the equation CH4 + 2 O2 -> CO2 +2 H20, how many grams of water are formed during the combustion of 0.264 mole of CH4?
October 26, 2014

math asap
Thank you!!
October 23, 2014

math asap
Thank you but on more question, where did you get the 8 in 3/8, i was confused about that. because the question has 3/5
October 23, 2014

math asap
i'm pretty sure its 25 because 25+15 = 40, but i don't know how to get the 25.
October 23, 2014

math asap
if a 40 m rope is cut into two pieces in the ratio 3 : 5, how long is each piece? i tried: x=one piece 3/5 = x/40 x= 3*40/5 x=120/5 x=24 is that right?
October 23, 2014

math
If a 40 m rope is cut into two pieces in the ratio 3:5, how long is each piece? I tried it but I checked it and it was wrong, please help.
October 23, 2014

Chemistry
That's okay, I'm just wondering how to calculate the pH's at each mL increment in order to create the graph.
October 22, 2014

Chemistry
Plot the titration of a weak base with a strong acid. Show the titration curve using .106M NH3 and .225M HCl for a 50.00mL sample of the ammonia. No idea where to start here. I'm supposed to plot the curve from 2mL increments (0-30). Tip on homework: *Remember to use the ...
October 22, 2014

Physics
1.) Let's say that an an orange is launched upward at 22m/s. What is the displacement 3.5s later? 2.) When a volcano erupts, big rocks have been measured to reach heights of 50km (50,000m) What would the initial velocity need to be in order to reach such heights (neglect ...
October 15, 2014

Physics
Assume that the batter did not continue to swing the bat after the collision (no energy was added to the system). How fast was the bat moving after the collision? The ball mass .145kg, the bats mass is 1.1kg. And the balls velocity is 44.7m/s and the bats velocity prior to ...
October 8, 2014

Science
The flask shown here contains 10.0 ml of HCl and a few drops of phenolphthalein indicator. The buret contains 30ml of 0.130M NaOH. What Volume of NaOH is needed to reach the end point of the titration? I've used m1v1=m2v2, (x)(10.0ml HCl) = (0.130 M/L NaOH) (0.03L) and ...
September 28, 2014

Pre-Calc
1.) If you use the parent graph y=sqaureroot of x as a reference, how would you graph y=sqaureroot of x+2+5? a.) Move the parent graph two units to the right and then up five units. b.) Move the parent graph two units to the left and then up five units. c.) Move the parent ...
September 26, 2014

Statistics
Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, ...
September 15, 2014

Statistics
Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, ...
September 15, 2014

PHYSICS
Three forces, A,B and C act in the same vertical plane from point O. Force A is 30N and acts horizontally to the left of O. Force B is 40N and acts vertically upwards. Determine force C and the direction in which it acts, if the forces are in equilibrium.
September 14, 2014

chemistry
Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. 2D(g)+3E(g)+F(g)>>>>2G(g) + H(g) when D is decreasing at 0.30 MOL/Ls, how fast is (H) increasing?
September 8, 2014

trigonometry
how fast is a toy car moving in ft/min if it makes 20 laps in one minute on a circular track of radius 3 feet ? ( i need to know how to set this problem up)
August 31, 2014

PHI 208
T, HILL Self-love Humility Self-acceptance Relational harmony
July 19, 2014

PHI 208
Hill refers to the ability to understand oneself, to face oneself, and to be honest about the kind of creature one is by this term
July 19, 2014

math
Paulo has $6 to spend. A sundae costs $3.25 plus $0.65 per topping. Write and solve an inequality to find how many toppings he can order.
June 24, 2014

Math
What is 7.061 as a mixed number?
May 23, 2014

Algebra 2
The shape of a park can be modeled by a circle with the equation x^2 + y^2 = 1600. A stretch of highway near the park is modeled by the equation y = 1/40(x - 40)^2. At what points does a car on the highway enter or exit the park? I am soooooo lost!
May 22, 2014

Physics
A 3.0 kg block is moved up a 37 degree incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.
May 7, 2014

Physics
A 3.0 kg block is moved up a 37 incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.
May 7, 2014

Chemistry
Not the value, the equilibrium constant. DrBob222, there's no instance of the letter "K" except in your own statement
May 5, 2014

Chemistry
you have to find the equilibrium constant for them.
May 5, 2014

Chemistry
Write the equilibrium constant expression for each of the following reactions: A. 4NO(g)+2O^2 <--> 2N^2O^4(g) B. 2NO(g)+ Br^2(g) <--> 2NOBr(g) C. CO(g)+ 2H^2(g) <--> CH^3OH(g) D. SO^2(g) + NO^2(g) <--> SO^3(g) + NO(g)
May 5, 2014

math
count by eigths to create a number line for the data that starts at 1 and ends at 3.
April 24, 2014

Chemistry
When given the equation 2Na+Cl2=2NaCl. How many liters of Cl2 will it take to react completely with 63.0 grams of Na?
April 16, 2014

algebra
a data set has the following points (0,2) (4,1) (6,0) the slope of the linear regression line is -0.32
April 15, 2014

Computers
Need help creating pseudocode for the following. Registration workers at a conference for authors of children's books have collected data about conference participants, including the number of books each author has written and the target age of their readers. The ...
April 8, 2014

PROGRAMMING
design a program for the following. Registration workers at a conference for authors of children's book have collected data about conference participants, including the number of book each author has written and the target age of their readers. The participants have ...
April 8, 2014

Social Studies
because the Old Testament referred to geocentrism and was considered most "authentic"
March 27, 2014

math
One day, the temperature outside increased by 6/10 every hour for seven hours. How much did the temperature increase that day?
March 24, 2014

math
Rachel spent 2 1/4 hours practing for her violin solo 5 times last week . How much times did Rachel spend practicing last week?
March 24, 2014

signals and systems
Ts=0.18, H(s)=3/s+3 ,find hI[n],HI[e^jw},hs[n]
March 23, 2014

biology
Can you give me a long list of smelly animals
March 20, 2014

stats
chance+of+winning+if+you+play+10+times+what+is+the+probability+of you+winning+once if you have a 10% chance of winning each time
March 3, 2014

Chemistry
A molecular compound has the empirical formula CH2. When 100mg of the compound is dissolved in 1.00 g of benzene, the solution freezes 1.75 degrees celsius lower than pure benzene. The Kf for benzene is 4.90 C/m. What is the MM of the compound?
February 26, 2014

Math
An open rectangular tank (no top) with volume 11 cubic meters has a square base. The base has side x m. Write an equation for the surface area of the tank as a function of the length x. Surface Area = ? b. The base costs 1.1 cents/square m and the sides cost 1.6 cents/square m...
February 17, 2014

Math
Consider the function f(x) = -2 x^3 + 36 x^2 - 162 x + 2. There are two critical points, A and B where A < B: A = and B = f''(A)= f''(B)= Therefore f(x) has a relative at A (MAX or MIN) and a relative at B (MAX or MIN).
February 17, 2014

algebra 1
when three times the distance to he finish line is increased by 5km, the total kilometers covered in the race will be between 50 and 89 km
February 11, 2014

Finance
Steve's ski shop has a net income of $389,000 with total sales of $2.5 million. Currently, the shop has debt of $500,000, equity of $800,000; receivables are 1.5 percent of sale, and Average total assets of $2,000,000. What is the Return on Equity? (Use the DuPont Identity)
February 9, 2014

Geometry
Jason wants to walk the shortest distance to get from the parking lot to the beach. a.How far is the spot on the beach from the parking lot? b. How far will he have to walk from the parking lot to get to the refreshment stand?
February 1, 2014

math algebra
3 < 4 – 2x
January 27, 2014

Chemistry
Calculate the heat given off when 177 g of copper cools from 155.0 c to 22.0 c. The specific heat capacity of copper is 0.385 j/g c
January 23, 2014

Statistics
In an essay of 250-500 words, thoroughly address the following items and respond to the related questions: 1.Define the term standard deviation. Why is it important to know the standard deviation for a given sample? What do researchers learn about a normal distribution from ...
January 23, 2014

physics
Which of the following was explained by the Bohr atom? 1. atomic spectra 2. the fact that most of the mass of an atom is in the nucleus 3. nuclear fission 4. the photoelectric effect
January 22, 2014

Maths
prove that 2+2=5
January 9, 2014

Math
For the integers from 1 to 1000, how many multiples of 9 are also multiples of 6?
January 2, 2014

Math
I don't get what you mean?
January 2, 2014

Math
Bob the builder has many sticks of length 3, 5, and 7. He wants to form triangles whose edges consist of exactly 1 stick. How many non-congruent triangles can he form with the sticks?
January 2, 2014

Algebra
What is the sum of all coefficients of the polynomial? f(x)= (3x^3 - 3x - 1)^38 * (2x+1)^4 * (x^4 - 3x^2 + 5x - 2)^77
November 25, 2013

math
I think term 55 but I am not sure what that proves or if it shows you the answer?
November 25, 2013

Physics
X rays bombarding heavy atoms can be used to eject electrons from the 1s shell in atoms; indeed, this is the starting point for Moseley’s experiments. Estimate the maximum wavelength of pho- tons required to eject an electron from the 1s shell of copper, for which Z = 29...
November 21, 2013

Physics
A 100-watt bulb becomes warm and glows brightly enough to light a small room. On the other hand, a 100-watt laser can cut holes in steel and would not be effective at lighting a small room. What is true about the light coming from these two sources that accounts for these dif...
November 21, 2013

Social Science
I have to conduct a project that will be time consuming and costly and I need to justify to my principal investigator why he should approve the funding for this project.
November 15, 2013

Phsyics
How might they use spectroscopy to deter- mine the atmospheric composition of these planets? 1. None of these 2. By analyzing the spectrum of the surface of the planets. 3. All of these 4. By analyzing the molecules that compose the planets. 5. By analyzing the spectrum of the...
November 13, 2013

english
unscramble the words in the following sentence to write sensible sentences : underline common noun the was about One an West old outlaw film in.
November 7, 2013

chemistry
N2 + 2O2 -->2 NO2 Suppose 31.25 g of N and 44.0 G of O react A. Calculate the mass of Nitrogen Dioxide formed. B. Which reactant is the limiting reactant? C. Calculate the mass of the excess reactant left after the reaction. D. Find the % yield if 52.3 g of NO2 is produced.
October 30, 2013

physic
A 2.25kg book is dropped from a height of 2.5m what is the acceleration?
October 22, 2013

Physics
Two ice skaters, Daniel (mass 70.0kg ) and Rebecca (mass 45.0kg ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at 14.0m/s before she collides with him. After the collision, Rebecca has a velocity of magnitude 6.00m/s...
October 17, 2013

Physics
A 4.2 g bullet leaves the muzzle of a rifle with a speed of 372.4 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the rifle? Answer in units of N
October 15, 2013

Math
The admission fee at an amusement park is 1.5 dollars for children and 4 dollars for adults. On a certain day, 294 people entered the park, and the admission fees collected totaled 716 dollars. How many children and how many adults were admitted
October 9, 2013

Algebra
A man invests his savings in two accounts, one paying 6 percent and the other paying 10 percent simple interest per year. He puts twice as much in the lower-yielding account because it is less risky. His annual interest is 418 dollars. How much did he invest at each rate?
October 9, 2013

Vocabulary Studies
Imagery is figurative language that evokes mental pictures, usually by appealing to our five senses. Imagine that you are standing on the beach in the picture. Write a paragraph of at least 5 complete sentences using imagery to describe your imagined experience. Use at least 3...
September 28, 2013

Chemistry
Table salt, NaCl, and sugar C12H22O11 are accidentally mixed. A 5.50g sample is burned and 3.60g of CO2 is produced. What was the mass percentage of the table salt mixture?
September 23, 2013

Vocabulary Studies
Imagine that you are standing on the beach in the picture. Write a paragraph of at least 5 complete sentences using imagery to describe your imagined experience. Use at least 3 examples of language that appeals to your 5 senses: taste, touch, hearing, sight, and smell
September 22, 2013

Physics 2
A 1.00-L insulated bottle is full of tea at 88.0°C. You pour out a mug of tea and immediately screw the stopper back on the bottle. Find the change in temperature of the tea remaining in the bottle that results from the admission of air at room temperature. (Let the room ...
September 17, 2013

Physics 2
A 1.00-L insulated bottle is full of tea at 88.0°C. You pour out a mug of tea and immediately screw the stopper back on the bottle. Find the change in temperature of the tea remaining in the bottle that results from the admission of air at room temperature. (Let the room ...
September 17, 2013

algebra
if f(X)=x^1/3+ 1/3x what is the value of f(27)
September 15, 2013

College Physics II
A steel wire and a copper wire, each of diameter 2.000 mm, are joined end to end. At 48.0°C, each has an unstretched length of 2.000 m. The wires are connected between two fixed supports 4.000 m apart on a tabletop. The steel wire extends from x = −2.000 m to x = 0, ...
September 3, 2013

Fourth grade math
What is the sum of the six three-digit numbers that have the digits 2, 4, and 6?
August 30, 2013

Fourth grade math
What is the sum of the six three-digit numbers that have the digits 1, 2, and 3? What is the sum in each column? Why is the sum in each column the same? my mom doesn't know how to help me with this one?
August 30, 2013

College Physics II (Calc-Based)
Okay so my equation was set up correctly and should read.. (1.00x10^-9)(1.90m^3)/(8.314x308.15) Correct? So my R would be 2.67724^-12?
August 29, 2013

College Physics II (Calc-Based)
In state-of-the-art vacuum systems, pressures as low as 1.00 x 10^-9 Pa are being attained. Calculate the number of molecules in a 1.90-m^3 vessel at this pressure and a temperature of 35.0°C. Okay. So I know I have to use the Ideal Gas Law, PV = nRT, I then transformed it...
August 29, 2013

physics
A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius 11.0 m. A passenger feels the seat of the car pushing upward on her with a force equal to three times her weight at the bottom of the dip. What is her speed as she goes through the ...
July 29, 2013

Statistics
True or False. Help please! Statistics' students of a class of Lyceum want to calculate the average number of chocolate pieces in a standard package of biscuits SANTAS. They choose a random sample of biscuits, measure chocolate pieces in each cookie and calculate the 95% ...
July 28, 2013

Statistics
I am confused.. maybe is D. I am copying this paragraph from wikipedia. Meaning and interpretation[edit] For users of frequentist methods, various interpretations of a confidence interval can be given. The confidence interval can be expressed in terms of samples (or repeated ...
July 26, 2013

Statistics
Thank you PsyDAG. Are yousure about B? I believe that B is correct but maybe A is correct. I have to choose only one.. You believe B is absolutely correct?? Can you help me and with the other one please?
July 26, 2013

Statistics
Oh no.. Maybe the correct answer is A!!
July 26, 2013

Statistics
Multiple Choice Which of the following statements is true about the 95% confidence interval of the average of a sample? A) 95 of 100 avgs of samples will be within the limits of the confidence interval. B) There is a 95% chance the avg of the population to be within the limits...
July 26, 2013

Statistics
I forgot to state my answer. 1) True 2) False 3) True 4) False. Do you agree?
July 26, 2013

Statistics
True or False Questions. Statistics' students of a class of Lyceum want to calculate the average number of chocolate pieces in a standard package of biscuits SANTAS. They choose a random sample of biscuits, measure chocolate pieces in each cookie and calculate the 95% ...
July 26, 2013

Statistics
Any ideas please? Simple random sample of voters will be taken in a large state. Researchers will construct an approximate 95% confidence interval for the percent of the state¢s voters who will vote for Candidate A. Find the minimum sample size needed to ensure that the ...
July 24, 2013

Statistics
I believe that: a) is False b) is True c) Is False. Any suggestions?
July 22, 2013

Statistics
True or False Question. I need help please. A sientific paper reports the results of a drug test. This medicine used to reduce vision loss in people suffering from macular degeneration. The article state p = 0,04 section findings. The following issues are of three different ...
July 22, 2013

chem 103
Question..where to start..If you had 250.0 g of copper (specific heat = 0.385), what temperature could you raise it to (starting from 20 degrees C) if you heated it with 1685 Joules of energy? If I use the formula q=MxCsX^T, How do I find ^T if I do not have a Tf, assuming 20....
July 21, 2013

Statistics
Yeah... I think you are absolutely correct. Also from the city is very possible to be there in 10 minutes so he will pay more for the parking. I changed my mind... Thank you a lot.
July 20, 2013

Statistics
S. Sue, Thank you. To be honest i was not sure about c.. I am between a and c.. More positive on c.. Are you sure?
July 20, 2013

Statistics
I need help with this please. It is a multiple choice question, so choose one from a,b,c please. I believe the correct is c. What do you think? Ari lives about 10 minutes away from the college to which he intend to attend a summer seminar of 10 weeks. There are two main routes...
July 20, 2013

Statistics
Thank you very much PsyDAG. can you help me with the other one i posted related to this please? (multiple choice)
July 20, 2013

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