Friday
September 19, 2014

Posts by zachary


Total # Posts: 92

Social Studies
how does the work of geographers in government differ from those in the busines world
August 22, 2014

Chemistry
How exactly do you get pH from Ka?
April 6, 2014

Chemistry
The following questions refer to the following acids and bases. A) Hydrazoic acid HN3 Ka = 1.9 x 10^-5 B) Hydrofluoric acid HF Ka = 6.8 x 10 ^-4 C) Nitrous Acid HNO2 Ka = 4.5 x 10^-4 D) Phenol C6H5OH Ka = 1.3 x 10^-10 E) Aniline C6H5NH2 Ka = 4.3 x 10^-10 1) which compound is ...
April 6, 2014

Strayer
Which of the following units could be associated with a vector quantity
January 28, 2014

Social Studies (History)
When searching for evidence to support a claim, what are important things to remember? Please explain your response.
December 3, 2013

physics
A certain LCD projector contains a single thin lens. An object 23.5 mm high is to be projected so that its image fills a screen 1.87 m high. The object-to-screen distance is 3.05 m. (a) Determine the focal length of the projection lens. mm (b) How far from the object should ...
March 27, 2013

urgent urgent algebra / precalculas
1. Given a function,H(x)explain how to find the components f(X)AND g(x) such that f(g(x)) = H(x) 2. let H(x)=(2x+5)^4 find the function f and , so that f(g(X))=H(x)
March 24, 2013

urgent urgent algebra / precalculas
For # 1, im getting stuck on this problem i dont understand this 1.4 = e ^ (0.03k) Now take the natural logarithm of both sides to solve for , ln 1.4 = ln e ^ (0.03k) ln 1.4 = 0.03k * ln e Recall that ln e = 1. ln 1.4 = 0.03 k Solve for k. Then try part b. For # 2, y = 3 + e...
March 22, 2013

urgent urgent algebra / precalculas
rewrite each in exponential expression as a logarithmic expression log, x=4 log 5=2 log b=x
March 22, 2013

urgent urgent algebra
rewrite each in exponential expression as a logarithmic expression a)log,x=4 b)log 5=2 c)log ,8=x
March 21, 2013

algebra URGENT HELP
cohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the bloodstream...
March 21, 2013

urgent urgent algebra / precalculas
lcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the ...
March 21, 2013

urgent urgent algebra / precalculas
Alcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the ...
March 21, 2013

urgent urgent algebra
find the composite function fog f(X) = 1/X-5,g(x)-6/x question 2 find inverse, domain range and asymatotes of each function f(x)=3+e^4-x can some one help me please been stuck on these for 2 days need help solving thank you
March 19, 2013

algebra URGENT HELP
7x-6 greater than or equal to -3x^2 reduced and written in interval notation
March 17, 2013

algebra URGENT HELP
x+14/x-8 ≥ 1 solve and write solution in interval notation
March 16, 2013

algebra URGENT HELP
analyze the graph of the following function solve R(x)=x(x-16)^2 /(x+11) solve the following inequality write solution in interval notation x+14/x-8 less than or equal to 1
March 11, 2013

algebra URGENT HELP
form a polynomial whose degree and zeros are given. dont expand a) degree 3,zeros,-2,0,4 b)degree 4,zeros, -2 multiplicity 3,1 multiplicity 1 solutions a)p(x)= x(x+2)(x-4) B)p(x) =(x+2)^3(x-1)
March 10, 2013

algebra URGENT HELP
A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)
March 10, 2013

algebra
p(X)= X(X+2)(X-4) P(X)=(X+2)^3(X-1)
March 9, 2013

algebra
solve A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)
March 9, 2013

college algebra
given the following polynomial find the zero and multiply of each were the graph touches the x axis number of turning points fx =(x-4)(x^2-25)
March 4, 2013

college algebra
y=x^2+2x+8
March 4, 2013

college algebra
Given the following quadratic equation, find;? a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function. y= -x^2+2x+8
March 4, 2013

help college algebra
given the following piecewise function f(x) = -x+1 for x<0 -1 for 0<x<3 -2x for x>3 find the domain find the range find the intercept d) is f continuous on it domain if not sate where f is dicontinous
February 26, 2013

college algebra
given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)
February 26, 2013

algebra
what are the intercepts of y=2x+2
February 24, 2013

math
solve for x 75=13^x
February 9, 2013

Math
Rearrange this equation to isolate c. a=b((1/c)-(1-d))
February 9, 2013

college chem
Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?
February 9, 2013

urgent urgent urgent
what is the chemical make up of actin and myocin
February 8, 2013

urgent urgent urgent
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. •Explain the chemical process that occurred ...
February 7, 2013

urgent urgent urgent
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. explain the process the muscle go through
February 6, 2013

chemstry
the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement
January 29, 2013

chemistry urgent urgent
... the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement.
January 28, 2013

Math
Emily wants to make a rectangular model with a height of one connecting cube. She wants to make the model in exactly 2 different ways. How many connecting cubes could Emily use to make the model in only two ways
January 22, 2013

chemstry
Classify six kinds of amino acids according to the functions that they serve in the human body, stating an example for each class.
January 21, 2013

chemistry urgent urgent
thank you
January 15, 2013

chemistry urgent urgent
Discuss, in detail, the role played by DNA and RNA in genetic diseases. What are the breakthroughs, if any, in the treatment/management of genetic diseases?
January 15, 2013

chemistry urgent urgent
the managing director of a company on wall street thrives on a diet of fruit jam,bread,pasta,and coffee.she exercises intermittently.one day she desides to go to her primary healthcare provider for a check up the provider recommends that she takes the benedicts test assume ...
January 9, 2013

chemistry
A freshman is currently enjoying the Arts Studio program she is pursuing at a well-known university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely weekend. According to ...
December 14, 2012

chemistry urgent urgent
do compare the differentes
December 10, 2012

chemistry urgent urgent
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?
December 10, 2012

Chemistry: Dr. Bob, can you check my work?
The first one was correct! I just used the incorrect number of sig figs. Thank you so much!
November 15, 2012

Chemistry: Dr. Bob, can you check my work?
Okay. I'll try both. 825mL - 712= 113. You have to convert mL to L in order to use the PV = nRT correct? if so,113mL=.113L P(.1130) = 1.47 moles CO2 * .0821 * 303 K .1130P=36.57 P = 323.6 atm -OR- 825-85.4 = 739.6 mL = .7396L .7369P=1.47(.0821)(303) .7369P=36.57 P=49.6atm
November 15, 2012

Chemistry: Dr. Bob, can you check my work?
In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a ...
November 15, 2012

Chemistry
I'm still not sure which volume to use though. would it be 825 mL, 825mL - 85.4 mL, or 712 mL?
November 13, 2012

Chemistry
Sorry, I made a mistake. 85.4 mL = .0854 L. .0854 L * .79 g/cm3 = .0675g. .0675/46(MM of C2H5OH) = .0147 moles ethanol. .0147 moles ethanol = .0147 moles CO2.
November 13, 2012

Chemistry
I found the moles of CO2 and I got 1.47. 85.4 L ethanol * .79 g/cm3 = 67.5g ethanol. 67.5/(12+12+5+16+1)= 1.47 moles ethanol. 1.47 moles C2H5OH *(2 moles C2H5OH/ 2 moles CO2) = 1.47 moles CO2. What do I use for the volume? do I use the volume of the bottle, the volume of the ...
November 13, 2012

Chemistry
In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a ...
November 13, 2012

History
Can you give me an idea of what to write for a veteran card
November 10, 2012

History
Write a thank you veteran card
November 10, 2012

college algebra
given the following rational, find the horizontal asympotes the vertical asymptotes if any and the oblique asymptotes if any f(x)=x^2-x-2 over 2x^2-x-10
November 6, 2012

college algebra
given the folowing quadratic equations find the vertex the axis of symmetry the intercept the domain the range the interval where the function is increasing andthe interval where the function is decreasing graph the function y=X^2+4x
November 6, 2012

college algebra
given function f(X)=X^3+3x findthe rate of change between the two stated values for x:1 to 2 find the equation of a secant line (1,f(1)and(2,f(2))
November 2, 2012

college algebra
graph the following function using transformations, be sure to graph all of the stages on one grph, state the domain and range y= x^2 +12x
November 2, 2012

college algebra
given the function f(x)= x^3+3x find the rate of chnge between the two values x:1 to 2 find the equation of a secant line containing the given points (1,f(1) and (2,f(2))
November 2, 2012

college algebra
graph the following function using transformations, be sure to graph all of the stages one graph, state the domain and the range y=x^2+12x
November 2, 2012

college algebra
given the functionf(x)=x^3+3x find the rateof change between the two stated values for x:1 to 2 find the equation of a secant line containig the given points (1,f(1))and (2,f(2))
November 2, 2012

college algebra
write the equation of the circle in standard form find the center radius, intercept and graph circle x^2 +y^2+8x+2y+8=0
October 26, 2012

college algebra
for the given equation list the intercepts and test for symmetry y = x^3 -512
October 26, 2012

English
That was a question
September 29, 2012

English
Each element is addressed and two examples from the texts is provided
September 29, 2012

Chemistry
In the second half of the experiment 3mL of hydrochloric acid and 30mL of barium chloride were reacted with a 0.7g sample of alum to get barium sulfate. The question says based on the mass of barium sulfate (0.46g), calculate the mass of sulfate in your sample of alum.
September 23, 2012

Chemistry
Based on the mass of barium sulfate (0.46g), calculate the mass of sulfate in a 0.7g sample of alum. I think I did this right but i'm not sure. 0.46g BaSO4/233.37g BaSO4=0.002mol BaSO4 0.002mol BaSO4 x 1mol SO4/1molBaSO4=0.002molSO4
September 23, 2012

Chemistry
Do I have to add q of the caloriemeter to that?
July 24, 2012

Chemistry
How would I find the limiting reagent in the chemical equation...CuSO4*5H2O+2K2C2O4*H2O-->K2[Cu(C2O4)2]*2H2O+K2SO4+5H2O I got that K2C2O4 was the limiting reagent but I dont know if that is correct.
July 9, 2012

Math
Jenifer works in a flower shop. On Saturday she started work at 8:45 a.m. She finsihed at 4:15 p.m. How many hours did Jenifer work after noon?
May 7, 2012

algebra
The week before the big concert, five friends Alan, Ben, Cameron, Derryck, and Garrett, stood in line to buy tickets. There were other people there, but the five friends were in the line in the order listed above. The line was really long, and they were pretty bored. Cameron ...
April 18, 2012

algebra
The week before the big concert, five friends Alan, Ben, Cameron, Derryck, and Garrett, stood in line to buy tickets. There were other people there, but the five friends were in the line in the order listed above. The line was really long, and they were pretty bored. Cameron ...
April 16, 2012

Math
what is scale
January 2, 2012

english
Cookies and doughnuts were displayed in the bakery window. What is the compuund subject and verb in this sentence?
October 25, 2011

Math
Round 5,024 to the nearest thousands
October 19, 2011

Algebra 2
What is the vertex of the graph of y = |x + 3|?
October 13, 2011

Computer
What general term describes the physical equipment of a computer system, suchn as its video screen,keyboard, and storage devices?
May 20, 2011

software
Software programs that allow you to legally copy files and give them away are called what?
May 20, 2011

Algebra
what is the greatest common monomial factor of 6x^2y^3z^4-4x^3y^3z^3+10xy^3z^4
February 22, 2011

Math
I dont know
February 4, 2011

Physics
a superhero flies 272m from the top of a tall building at an angle of 32 below the horizontal. what is the vertical component of the superhero's displacment?
December 26, 2010

geometry
dsds
September 6, 2010

Algebra 1
What is the Advantage of Buying a Magnetic Bullein Board
March 9, 2010

Foreign Languages
Can someone tell me what Melodifestivalen is?
November 4, 2009

Foreign Languages
How do you say "I love you,my love,when I hear the voice I love you,my life is never without you I live my life for you,It's the universe for me I love you,my love,when I her the voice" in French
November 4, 2009

6th grade
I'm a special ed kid and I need help to unscramble these science words ,itvbarnoeso, lncsuoicno and ecrfenine
September 24, 2009

math
i cant figure out the distributive property of 2a+4b I
August 19, 2009

quadratic
what is -x^2+4=(3x-1)^2 in the form ax^2+bx+c=0
July 25, 2009

kinematics
these are two similar kinematics maths question which i dont know. Please help! 1)A particle moves in a straight line so that its distance, s metres, from a fixed point O is given by s = 2t^3 - 3t^2 - 12t + 6, where t is the time in seconds after passing O. Find the minimum ...
June 19, 2009

math
20?
May 11, 2009

social studies
what was william penn's four promises for others to come to philadephia
February 7, 2009

algebra
of ten boxes, five contain pencils, four contain pens, and two contain both pencils and pens. How many boxes are empty??
January 14, 2009

Chemistry
Calculate the molar mass of a compound that raises the boiling point of water to 100.15oC when 40.5 g of the compound is dissovled in 500 g of water. and A mass of 41 g of an unknown nonelectrolyte is dissolved in 429 g naphthalene. The nonelectrolyte lowers naphthalene's ...
April 30, 2008

Chemistry
In an experiment 0.5300 g of ferric oxide is reacted with 0.3701 g of carbon monoxide gas according to the equation: Fe2O3 + CO ==> Fe + CO2. A. What is the limiting reactant? B. What mass of the other reactant is in exess? C. What mass of iron is produced?
February 29, 2008

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