Thursday
October 23, 2014

Posts by ericka


Total # Posts: 56

Science
All these answers were correct when I used them. I got a 100%! Thank you!
March 4, 2014

Algebra
I'm confused regarding the elimination method for 5x - 7y = -16, 2x + 8y = 26
November 9, 2013

Science
A rectangular brick measures 6cm by 9cm by 20cm and has a mass of 2.563 kilograms. What is the density of the brick in grams per cubic centimeter?
October 27, 2013

Percy Jackson:Lightning Thief
Ok. What is a motif, though?
August 27, 2013

Percy Jackson:Lightning Thief
What is the motif in "Lightning Thief" ?
August 27, 2013

definition
What is a motif?
August 26, 2013

fractions
What are some helpful hints or tips about fractions?
August 22, 2013

fractions
Write the following fraction as a numeral: One piece of pie from a pie that is cut into six parts. Please check: 1/6
August 21, 2013

analogies
How do I put this into 2 sentences? up:down heavy:light For example: water:liquid ice:solid Water is a type of liquid. Ice is a type of solid.
August 13, 2013

Percy Jackson:Lightning Theif
I have to print some pictures about or from the book "Lightning Theif" Does anyone know some pictures? *It cannot be from the movie.
August 3, 2013

GEOMETRY(SURFACE AREA)
18.63
July 14, 2013

Finite Math
Two balls are drawn from a bag with 4 black balls and 2 white balls. Find th probability distribution got drawing 2 black balls.
June 16, 2013

Pre-Calculus
A surveyor measures the distance between buildings X and Y as 200 feet. The angle of elevation from the base of X to the top of Y is 25 degrees. What is the height of building Y?
May 20, 2013

History
I need help please I am not understanding what my instructor means by "trace the contextof the question across the entire sweep of time, from pre history to c. 1500CE, converting at least 3 separate eras as they are viewed in at least three world culture areas. World ...
February 15, 2013

World history
"As his power grows, Charlemagne proves himself a mastermind, next to military and civil government." In what ways?
February 14, 2013

World civilizations
Although most students begin by assuming settled farming life was better than that lived by hunter-gatherers, closer acquaintance with full Paleolithic Hunter-Gatherer life shows us many aspects that could be considered easier than that of very early, settled Neolithic farmers...
January 28, 2013

physics
What is the pressure inside a 33.1 L container holding 109.1 kg of argon gas at 399 K?
November 12, 2012

math
5th grade math equations
September 25, 2012

physics
A 1.5-kg block rests on top of a 7.5kg block. The cord and pulley have negligible mass, and there is no significant friction anywhere. Part a) What force F must be applied to the bottom block so the top block accelerates to the right at 2.9 m/s^2 ? Part b) What is the tension ...
May 7, 2012

physcis
well noone answered it and so i reposst it. thank you for your responnse but the last message was not needed.
May 7, 2012

physcis
What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82?
May 7, 2012

physics
Question # 1 : What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82? Question # 2 : A 1.5-kg block rests on top of a 7.5kg block. The cord and pulley have negligible mass, and there is no significant ...
May 7, 2012

physics
Question # 1 : What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82? Question # 2 : A 1.5-kg block rests on top of a 7.5kg block. The cord and pulley have negligible mass, and there is no significant ...
May 7, 2012

statistics
The data set given below has y^ = 3x - 5 for its regression equation. Find the standard error of estimate. x 3 2 5 8 y 4 1 10 19 A) 1.29 B) 0 C) 2.06 D) 0.17
March 23, 2012

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
September 17, 2011

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
September 17, 2011

Math 118
License plates are made using 2 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is allowed?
July 12, 2011

Science
CH4 + 20 2 --> CO2 + 2H2O How many liters of CO2 would be produced if 32 grams of CH4 are combined with oxygen??? How many grams of H2O would be produced when the 32 grams of CH4 are burned???
April 1, 2011

math
If someone's height is six feet and is enlarged to 16.8 inches, what is the scale factor?
January 20, 2011

Math Finite
A two card hand is dealt from a standard deck. What is the probability of drawing at least one face card?
December 9, 2010

Math Finite
How many years will it take for $12,000 to grow to $15,000 at 5.75% compounded monthly?
December 8, 2010

Finite Math
What interest rate, compounded weekly, would you need to be paid in order to grow an $8000 investment into $12,000 over a ten year period?
December 7, 2010

Finite Math
What interest rate, compounded monthly, would you need to be paid in order to grow a $2000 investment into $3500 over a five year period?
December 7, 2010

interior decorating
historically, who influencedthe style and trends of art, architecture, furniture and fashion? a. interior designers b. upper class c. architects d. artists
December 7, 2010

math
3x^2+11x+5=15?
December 1, 2010

Math
Flying against the wind, an airplane travels in hours. Flying with the wind, the same plane travels in hours. What is the rate of the plane in still air and what is the rate of the wind? Rate of the plane still in the air= ____km/h Rate of the wind= ____km/h
April 14, 2010

Chemistry
The Ka of hydrazoic acid (HN3) is 1.9 × 10-5 at 25°C. What is the pH of a 0.35-M aqueous solution of HN3?
December 10, 2009

Chemistry
Cyclopropane is converted to propene in a first-order process. The rate constant is 5.4 × 10-2 hr-1. If the initial concentration of cyclopropane is 0.150 M, what will its concentration be after 22.0 hours?
December 10, 2009

Chemistry
10g of Sodium Chloride are dissolved in 200ml of H2O. What is the mass percentage of solute in this solution?
December 10, 2009

chemistry
The body-centered cubic unit cell of a particular crystalline form of silver is 2.2887A on each side. Calculate the density of this form of silver?
December 10, 2009

chemistry
A buffer is made by adding 0.300 mol HC2H3O2 and 0.300 mol NaC2H3O2 to enough water to make 1.00 L of solution. The pH of the buffer is 4.74 . Calculate the pH of this solution after 0.020 mol of NaOH is added.
December 10, 2009

physics
Given: latent heat of fusion of water 3.33x10^5 J/kg. A 147 g cube of ice at 0 degress C is dropped into 1.3 kg of water that was originally at 79 degrees C. What is the final temperature of the water after the ice melts.
December 8, 2009

syllable patterns
how can you tell rather the first vowel in a word has a long or short vowel and how do you divide them
October 13, 2009

9th grade history
how did mccarthyism affect the lives and political thinkink of th e people in the u s
September 29, 2009

Chemistry
I have to list all of the ions of zinc, the thing is, the only ion I could find was Zn^2+. I've googled "ions of zinc" but this was the only one I could find. Are there any others? Thanks.
April 22, 2009

Chemistry
What is zinc's hardness (high, medium or low) I found the number on a hardness scale, (2) but I have no idea how the scale works, and if this would be considered high.
April 22, 2009

HCA 270
Sorry, I need help with the whole assignment, CheckPoint: Ratio Analysis. I have no idea what needs to be done to get the answers.
November 7, 2008

HCA 270
Has anyone taken Axia's HCA 270? Need help on Checkpoint: Ration Analysis.
November 7, 2008

chemistry
24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.
April 19, 2008

chemistry
24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.
April 19, 2008

chemistry
Find the temperature at which the reaction below is spontaneous given this data: Hfo of NH3(g) = - 46 kJ/mol, So of NH3(g) = 192.5 J/mol·K, So of N2(g) = 191.5 J/mol·K, So of H2(g) = 130.6 J/mol·K. N2(g) + 3H2(g) ßà 2NH3(g)
April 19, 2008

chemistry
Whats wrong with this answer? Ksp = [Pb2+]^3 [PO4]^2 = (2.3E-9)^3 (2/3 * 2.3E-9)^2 = 4/9 * (2.3E-9)^5
April 19, 2008

chemistry
Ionization equation for Pb3(PO4)2 is Pb3(PO4)2 --> Pb^2+ + 2PO4^3- Ksp = [Pb^2+][2PO4^3-] Ksp = [2.3 x 10-9 mol][4.6 x 10-9 mol] = 1.1 x 10-16 mol I am stuck
April 19, 2008

chemistry
If the concentration of Pb2+ is found to be 2.3 x 10-9 mol/L in a saturated solution of Pb3(PO4)2, what is the Ksp of Pb3(PO4)2 ?
April 19, 2008

chemistry
24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.
April 19, 2008

Substitution Method in Algebra!HELP PLZ!
knfnkasnga \
November 5, 2006

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