Tuesday
February 28, 2017

Posts by j

Total # Posts: 1,003

Math
11
December 9, 2015

math
If it takes a lawn company 5 hours to cut 6 lawns, how many yards can be cut in 12.5 hours?
December 9, 2015

Child Development and Human Behavior
. Which of the following factors helps a child develop a positive self-concept? A. Material wealth B. The sex of the child C. Family relationships D. Conflicts with teachers
December 8, 2015

civics
@Reed I think #1 would be A, #3 would be C, and #2 would be B. Am I correct now?
December 2, 2015

civics
Please check my answers! 1. The Nineteenth Amendment granted women the right to vote, but women had been fighting for years for this right. Before the Nineteenth Amendment was passed, which existing amendment could women have used to argue that they should have the right to ...
December 2, 2015

History
Yes, C.
November 30, 2015

Chemistry
If you want to prepare 2.0 liters of a .25 M solution of NH4Cl, how many grams of the salt should you weigh out?
November 29, 2015

Chemistry
Assume you have prepared 100.0 mL of a buffer solution using 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate. The pH of this buffer solution is initially 4.74. After preparing this buffer solution, you added 55.0 mL of a 1.10 M NaOH solution to your ...
November 26, 2015

Chemistry
A chemist needs to prepare a buffer using the carbonate system (information in the table in the previous quetion) with a final pH of 10. Which components should they mix in water to product this buffer? Question options: H2CO3 HCO3- CO32-
November 26, 2015

Chemistry
A chemist needs to prepare a buffer using the carbonate system (information in the table below) with a final pH of 6. Which components should they mix in water to product this buffer? H2CO3 HCO3- CO32- pKa 6.35 10.33 N/A
November 26, 2015

Chemistry
The pH of a buffer can be predicted using the Hendersen-Hasselbach equation: pH=pKa+ log([conjugate base][conjugate acid]) The choice of the conjugate acid-base pair (as you did in the previous questions) determines the pKa value to be used in the H-H equation. By varying the ...
November 26, 2015

Help Math PLZ
deez nuts is right! 10/10!
November 22, 2015

Chemistry
365
November 22, 2015

Science
A 6.90-g sample of solid NiSO4·6H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior, what volume would that steam occupy at 1.00 atm and 100.0 °C?
November 19, 2015

Math
Quinn
November 3, 2015

precalc
Solve in radians. 1) sin2X = 1/2 2) tan2 (X + pi/2) = 1 3) 5 - 3sec (X - pi/4) = -1
October 27, 2015

Physics
A boat moving at 5 mi/h is to cross a river in which the current is flowing at 3 mi/h. In what direction should the boat head to reach a point on the other bank of the river directly opposite the starting point?
October 7, 2015

jones
What is greaterthan 40 and less than7 tens
October 5, 2015

geometry
I need help to did anyone answer this
September 25, 2015

Science
no it is true not false
September 24, 2015

W
Some people in a hotel are dropping water balloons from their window onto the ground below. The balloons take .15s to pass your 1.6m tall window. Where should security look for the raucous guest? Express your answer using tow significant figures.
September 23, 2015

Algebra
On successive plays, the home football team gains 12 yd, loses 3 yd, loses 5 yd, gains 15 yd and runs 16 yd for a touchdown. What is the average gain or loss in yards per play?
September 14, 2015

chem
The half-life of the Nobelium isotope No^257 is about 23 seconds. 644 seconds (or 28 half-life periods) after the isotope was released there were 20 grams remaining. The number of grans of No^257 after h half life periods is M= 20 * (1/2)^h where h = 0 corresponds to 644 ...
September 13, 2015

algebra
Maria shares a house with 4 others. She pays $500 rent per month plus her utilities. If the utilities cost a total of x dollars, how much more money,M, does maria owe Write an equation for how much maria owes.
September 9, 2015

math
The standard deviation of a sample taken from population A is 17.6 for a sample of 25. The standard deviation of a sample taken from population B is 21.2 for a sample of 30. The standard deviation of the sample mean differences is_____. (Round your answer to the nearest ...
July 15, 2015

Finance
a
June 28, 2015

Chemistry
the volume for this question is 1 tsp. still not sure how to solve it.
June 20, 2015

chemistry
50cm3 of hydrogen is collected over water at 17 degree celsius and 750 mm Hg pressure.Calculate the volume of dry gas at S.T.P.The water vapour pressure at 17 degree celsius is 14 mm Hg?
May 28, 2015

science
,bb,j
May 18, 2015

Algebra please help
do your own work, i only come here check work!
May 14, 2015

Art and Creative Development
Art helps children socially because: A. they can make artistic products for others to see at art shows B. during are activities, they interact and learn social skills such as sharing and taking turns. C. they can make crafts that can be sold to other people. D. children cannot...
May 4, 2015

Art and Creative Development
Young children who learn easily, ask thought-provoking questions, and are very curious are often: A. gifted or talented B. behavior problems in the classroom C. poor at following directions D. overly shy and withdrawn socially i think it is between a and d but i am not sure
May 4, 2015

physics
two charges of equal magnitude are 25.5 cm apart if the force between the charges is 155 N what is the magnitude of the charges
April 28, 2015

math
Sam has 18 coins in his pocket that are either quarters or nickels. The total value of these coins is $3.90. Let q represent the number of quarters and n represent the number of nickels. The following system of equations represents this situation: q+n=18 0.25q+0.05n=3.90 How ...
April 27, 2015

math
A community group bought 25 tickets to a play. Adult tickets cost $30 each and student tickets cost $20 each. In all, the group spent $620 on the tickets. Determine if each equation is a part of the system of equations that can be used to find the number of each type of ticket...
April 27, 2015

Math
amy and anonymous are right 100% baby!
April 24, 2015

Geometry
Describe the difference between saying that two segments are congruent and saying that two segments have equal length. When would you use each phrase?
April 23, 2015

World History
Explain the impact of the Japanese attack on Pearl Harbor.
April 18, 2015

physics
find the weight of a person with a mass of 68.0kg
April 15, 2015

Language Arts
1. a is wrong it was b
April 9, 2015

Radiometric (Radioactive) Dating
How old is a sample that contains 125 atoms of U-235 and 375 atoms of Pb-207? ...Given that the half life values on my handout are 713 million years. *I do not even know where to start so could you please explain in steps too? Thanks.
March 29, 2015

finite math
Sam wants to invest the same amount at the end of every 3 months so that he will have 4000 in 3 years. The account will pay 6% compounded quarterly. How much should he deposit each quarter.
March 27, 2015

finite math
A young couple saves for a down payment on a house by depositing $100 each month into an annuity that pays a 4.8% annual rate. Find the amount in the annuity at the end of 2 years.
March 27, 2015

english grade 8
winter wonder land is right
March 23, 2015

Math
420 people is t
March 22, 2015

Math
6 is right
March 19, 2015

math <3
yes that is right
March 17, 2015

Math!! Help ASAP
this stuff is so easy you guys should know this stuff!
March 17, 2015

Math
32
March 16, 2015

Chemistry
An electron has an uncertainty in its position of 507pm. What is the uncertainty in its velocity?
March 13, 2015

Art
Thanks, just got a 100%!!!
March 12, 2015

High School Algebra II
This website doesn't allow links so I had to be creative, i'm sorry. The link is h t t p://imgur. com/a/ZxWLk If you just remove the spaces, you can access the link.
March 8, 2015

High School Algebra II
Hey friends, I have a big assignment I've been given that I really, really could use an 100% on. I've been working on it for hours and have a decent amount done, have had teacher help, and have had friends work with me on it, but I still need help. If anyone has any ...
March 8, 2015

Math
c it is c
March 7, 2015

Math Help!
yes it is
March 6, 2015

Art
By the way, thanks Ashley!
March 2, 2015

Art
I think Ms. Sue is just jealous because she didn't answer it all right.
March 2, 2015

Physics
My DONG
February 26, 2015

english
mr. bacon is right
February 20, 2015

chemistry
At 29.6 degrees C, pure water has a vapor pressure of 31.1 torr. A solution is prepared by adding 86.7 g of "L" a nonvolatile nonelectrolyte to 390.0 g of water. The vapor pressure of the resulting solution is 27.6 torr. Calculate the molar mass of "L"
February 13, 2015

Trigonometry
jijj
February 12, 2015

Art
midnight was right thanks
February 11, 2015

algebera
they are all wrong the real anwsers are bbcab
February 10, 2015

Geometry
ij ]
February 9, 2015

Geometry
544
February 5, 2015

Geometry
540
February 5, 2015

statistics
Produce a 99.9 % confidence interval for the population mean body temperature of a healthy male. Then do the same for the population of healthy females. Round your answers to three decimal places.
February 3, 2015

Chemistry
31.05
February 1, 2015

Math.
danny is right
January 28, 2015

ART HAVING HARD TIME
Mwah! Thanks, got 100%
January 22, 2015

United states history
National debt
December 8, 2014

finance
A stock has a beta of 2.0. A security analyst who specializes in studying this stock expects its return to be 24%. Suppose the risk-free rate is 6 percent and the market-risk premium is 10 percent. Is the stock overvalued or undervalued relative to the market’s ...
December 8, 2014

Algebra
I need help with my math pizzazz worksheet page 167 1.3x-5y=13 X-2y=5 2.7x-2y=-1 3x-4y=19 3.2x+3y=7 3x+4y=10
December 8, 2014

algebra
to conduct a scientific experiment, students need to mix 90 millimeters of a 3% acid solution. They have a 1% solution and a 10% solution available. How many millimeters of a 1% solution and of the 10% solution should be coming to produce 90 millimeters of the 3% solution .01x...
December 7, 2014

Chemistry
A) if you added 8g of ammonium nitrate to 25mL of room temperature water, what would be the temperature in °C?
November 30, 2014

MATH 100
The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one 10 times as strong as the other, are placed 9 ft apart, how many feet from...
November 27, 2014

Fins nance business
1. Find the future value of current $1,000 5 year from now when annual interest rate 8% is compounded annually 2. Find the present value of a future value (1,000) four years from now when annual interest rate 8% is compounded quarterly. 3.Find the present value of a four year...
November 20, 2014

Chemistry
The standard free energy change, ΔG∘, and the equilibrium constant K for a reaction can be related by the following equation: ΔG∘=−RTlnK where T is the Kelvin temperature and R is equal to 8.314 J/(mol⋅K). Calculate the equilibrium constant ...
November 16, 2014

History
Freed of assembly and press is basically like the News or the newspaper. It give the people the freedom to public current issue and information going on without being at risk of going to jail or killed.
November 13, 2014

Maths
6.35555 Meters tall?
November 12, 2014

chemistry
Let's say for example I have 5g of copper in a beaker. Mass would be 5g + mass of beaker. If I add any given amount of water to the beaker containing the copper, that will change the mass of the beaker containing the copper. Am I correct so far? So then if I pour out the ...
November 5, 2014

Chemistry
0.017
November 5, 2014

chemistry
Does one mole of copper have the same mass as one mole of iron? Explain. - I say no since: 1 mol Cu = 63.55g/mol 1 mol Fe = 55.85g/mol So 1 mol of copper is 63.55g, while 1 mol of iron is 55.85g. So they have a different mass because their molar masses are different, right?
November 5, 2014

Math
I am not exactly sure but... Since there is a 30% chance that he will have to stop at the first light, there is a 70% chance that he won't. And since there is an 80% chance he will have to stop at the second light, there is a 20% chance he won't. So I subtracted -> ...
November 5, 2014

Math
I think the answer is C) 50%
November 5, 2014

math
50 cups each*
November 5, 2014

math
- Convert 25 L into 25000 mL - Let x be the unknown number of cups. - You will be able to find the number of cups with the equation: 200x +300x = 25000 500x = 25000 x = 50 The class sold 50 cups of orange juice.
November 5, 2014

chemistry
So the number of moles on the left side would have to equal the number of moles on the right side of the equation? And does this apply for the total number of moles on one side, or just the number of moles of one element on one side?
November 5, 2014

chemistry
Is the number of moles of an element reacted equal to the number of moles of an element produced? -Let's say for example, 5g of copper. So the molar mass of copper (according to my textbook in which I need to use those numbers) is 63.55g/mol So 5g / 63.55g/mol = 0.08mol So...
November 5, 2014

Chemistry
The answer that you provided is in fact incorrect. The H2+CsOH on the right side of the equation contains 3 hydrogen atoms. However, you only have 2 hydrogen atoms on the left side of the equation. Therefore, your equation is unbalanced. Keep trying!
November 5, 2014

chemistry
N2
October 26, 2014

math
145% of 320 what does this =
October 9, 2014

math
if a house is worth 85,000 what is is value in a year at 5%
October 8, 2014

Math
12 lb.20oz
October 3, 2014

English
what is the focus of the novel of the great gatsby, whats the writers styles, and his views and tone toward the subject (even if it is himself)
October 3, 2014

English
What are some major obstacles, failures and triumphs in Jay Gatsby's life? What is the development of career or interests of this character in the book? I can't remember many points for the first question and for the second question I don't really understand what ...
October 2, 2014

Simplify this Expression?
(z-2z+4z)+6 3z+6
October 2, 2014

Pre-Calc (Circles). Please help :(
Five concentric circles with radii 1, 2, 3, 4, and 5 are drawn as shown dividing the circle of radius 5 into five regions: a circle of radius 1 and 4 annuuli (rings). What is the probability that a point chosen randomly from within the circle of radius 5 lies in the annulus ...
September 28, 2014

math
Benjamin and Bob are marathon runners on a run from landmarks P to Q. Benjamin runs half the way and walks the other half. Bob runs half the time, and walks the other half. The two run at the same speed and walk at the same speed. Who finishes first?
September 22, 2014

Health--Check my answers
They wrong. Here's right D A C B False True False False True True
September 21, 2014

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