Wednesday
October 1, 2014

Posts by dani


Total # Posts: 225

ALGEBRA
i need help with this problem
February 23, 2011

Chemistry Help!!
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree Celsius and placed in two identical insulated containers. one hour later, the two containers are opened and the temperature of each substance is measured. the aluminum has cooled to 35 degree ...
January 19, 2011

Physics
A 14,245N auto with a velocity of 6.0m/s crashes into a brick wall. If the car moves 64.0 cm before coming to a stop, what average force does the car exert on the wall?
January 13, 2011

Physics
A 14,245N auto with a velocity of 6.0m/s crashes into a brick wall. If the car moves 64.0 cm before coming to a stop, what average force does the car exert on the wall?
January 13, 2011

math
80.00
December 26, 2010

chem: gases, liquids, solids
How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0° C to steam at 100°C? For water: s = 4.179 J/g °C (delta)H fusion = 6.01 kJ/mol (delta)H vap = 40.7 kJ/mol
November 30, 2010

Chemistry: gases, liquids, solids problem
4 NH4NO3 -> 8 H2O + 4 N2 + 2 O2 What will be the total volume in liters of gas produced at 720. mm Hg and 570.0°C when 2.50 g of NH4NO3 completely decomposes? Use molar masses with at least as many significant figures as the data given.
November 30, 2010

Chemistry
thanks Liliana! and everyone else.
November 20, 2010

science
explain why a single5 500 kg block of granite weathers much more slowly than 100 chunks of granite weighing 5 kg each.
November 18, 2010

chemistry
A 3.0% by mass solution of H2O2 contains 3.0 g of H2O2 per 100 g of solution. (3.0 g H2O2 / 100 g solution) x (1.01 g solution / 1 mL solution) x (1000 mL / L) = 30.3 g H2O2 / L (30.3 g H2O2 / L) x (1 mole H2O2 / 34.01 g H2O2) = 0.8909 moles H2O2 / L = 0.89 M to 2 sig figs
November 17, 2010

math
_______7m______ |\ / | | \ 2.8m 2.8m / | | \ / | | n \ / | | / \ n | | / \ | | / \ | / 2.8m 2.8m \ | ____________ \ | Find the area of each shaded region( n not shaded). Assume that all angles that appear to be right angles are right angles.
November 16, 2010

Math
This irregular shape has 2m,2m,2m, 3m, 4m, 7m _2m_ _2m_ | |2m__3m_| | | | |________| 4 m 7 m how would I find the area if you can't tell how it is so you can't answer it I understand
November 16, 2010

Math
A= 10,560 ft x 2 mi
November 16, 2010

Math
Find the measures of two supplementary angles if the difference of their measures is 56 degrees I know supplementary angles are the sum of the measure if two angles is 180 degrees but then what is the question asking?
November 16, 2010

math
A= 5 m x 200 cm A= 500 cm x 200 cm A= 100000 cm2?
November 16, 2010

math
How do areas of two parallelgrams compare when the dimensions of one are three times the demensions of the other?
November 16, 2010

math
A= 100 cm x 1 m A= 100 cm x 100 cm A=10000 cm2?
November 16, 2010

math 7th
similar figuers have the same shap but not the nesessarily the same size. They have corresponding angles and corresponding sides. What exactly do you need help with?
November 16, 2010

math
but I don't get how to tell if it is m or cm
November 16, 2010

math
A= 0.5 m x 20 cm
November 16, 2010

math
the answer is 1m2
November 16, 2010

math
A square with an top as 100cm and a side with 1 m A= b x h A= 100 x1 A= 100 cm2 or m2?
November 16, 2010

Weather & Climate (science)
Why is it that an Aneriod Barometer Can be used to measure elevation as well as air pressure?
September 14, 2010

math
How are sales tax and discounts figured? specifically socks @ $2.99 and 5.5% sales tax
September 12, 2010

biology
when the peple are having s*x
September 8, 2010

Weather & Climate (science)
okayy and there are alot more questionss
September 8, 2010

Weather & Climate (science)
Which ones/one is true? a.)Altitude affects density b.)Altituce is the dictance above sea level c.)Altitude is also call elevation
September 8, 2010

Weather & Climate (science)
Thankss
September 8, 2010

Weather & Climate (science)
1.A(an)_________________ barometer Has a closed space surrounded by metal 2.A(an)_________________ barometer Has a glass tube that is open at the bottom end. ive been tryin thesse for ever! when awncering put like for example ur goi no awncer #1 put 1. then the awncerr
September 8, 2010

science
either e or c
September 8, 2010

Weather & Climate (science)
i just added them to the current questions
September 8, 2010

Weather & Climate (science)
Thankss. Can you help me with some more problemss?
September 8, 2010

Weather & Climate (science)
1. an insturment used to measure air pressure is a(an)___________________________________.
September 8, 2010

Algebra/Word problem
320! i thinkk
September 8, 2010

7th grade
what he said
September 8, 2010

spanish
Correctt
September 8, 2010

6th grade math
But how does it awnser in part related to factors of 10
August 31, 2010

math
i need some serious help with limits in pre-calc. here are a few questions that i really do not understand. 1. Evaluate: lim (3x^3-2x^2+5) x--> -1 2. Evaluate: lim [ln(4x+1) x-->2 3. Evaluate: lim[cos(pi x/3)] x-->2 4. Evaluate: lim x^2+x-6/x^2-9 x--> -3 5. ...
July 13, 2010

statistics
Give an estimate for each expression in Exercises, Then state whether you believe that the exact answer is greater than or less than the estimate. Explain how you decided. Use a calculator to check the accuracy of your estimate. 978 X 66
July 10, 2010

alegbra
b
May 30, 2010

computers
Can you find both multitasking system and a multiprocessing system operating system?
May 26, 2010

algebra
Thank you for the information.
May 13, 2010

algebra
I have one more step in my question. I have to Find the value of 10^-2.4 by putting this value in a calculator. I do not have a calculator to do this, can anyone help me out?
May 13, 2010

language
Because a compound is when two words are joined together to make one word. Black alone ia a word. Is ness?
May 9, 2010

language
no examples eye + ball= eyeball grand + mother = grandmother
May 9, 2010

language
A compound word is made when two words are joined to form a new word
May 9, 2010

language
Homonyms are words that sound like one another but have different meanings. B
May 9, 2010

Algebra- IS this right?
Evaluate The Logarithmic Equation For 3 Values Of X Greater Than -1 3 Between -2&-1 &x=-1 Y = Ln(x + 2) Y = Ln(x + 2) ,x=3,y=1.6,1.6>-1. X=-1,y=0.
May 9, 2010

Algebra- IS this right
Evaluate The Exponential Equation For 3 Positive, 3 Neg. Values Of X &x=0 Y=3^-x" Y=3^-x,x=3y=1/27, x=-3,y=27,x=0,y=1.
May 9, 2010

Algebra
I need to rewrite the following as an equivalent logarithmic yt = x I wrote logy=logt=logx. My teacher said that was wrong. Can someone guide me on the right answer?
May 8, 2010

Algebra
Given log b 3 = 0.8397 and log b 7 = 1.4873. Find log b 3b Is the right answer 0.8397
May 7, 2010

algebra
My choices for this question are a x = log8 over log 3 b x log = log 8 c x=log 3 over log 8 d x= ln8 over ln3
May 5, 2010

algebra
My choices for this question are a x = log8 over log 3 b x log = log 8 c x=log 3 over log 8 d x= ln8 over ln3
May 5, 2010

algebra
Can you please tell me me if the expression or equation that is equivant to 8^x=3 would be x log 3 = log 8?
May 5, 2010

algebra
Rewrite the following as an equivalent logarithmic equation.Do not solve. y^t = x answer logy+logt=logx-is this right also Express as an equivalent expression that is a sum of logt (3ab) the t is at the bottom of the g answer log3+loga+logb logarithms.
May 5, 2010

Is this right
I need to express as an equivalent expression that is a sum of logarithms. logt 13ab2 is this right (log+13t+loga+log+b+log+2)
May 4, 2010

Is this algebra question right
Do you rewrite the following as an equivalent logarithmic equation yt=x as E^2-2=7.3891?
May 4, 2010

Algebra
what would be the approximation to the nearest ten-thousandth log 8900 over log 110?
May 4, 2010

algebra
Not sure where to go next. I need to solve this quadratic equation 7x^2-5=0. This is what I have so far, not sure where/what to do next x=2/7 x=sqrt2/7 or x=-sqrt2/7* =+/-sqrt2/7 +/-sqrt14/7 not even sure if this is right.
May 3, 2010

algebra-Am I right so far
Use the quadratic formula to determine the x-intercepts (if any)f(x)=2x^2=2 am I right so far? f(x)ax^2+bx+c y=ax^2+bx+c y=2x^2+2 y=0=>2x^2+2=0 =>2x^2+2=0 ax^2=2,bx=2,c=0 x=b=sqrtb^2+4ac over 2a x=(2)+sqrt(2)^24(2)(0)over2(2) x=sqrt4+4over 2
May 2, 2010

algebra
Is the line of symmetry in f(x)= -(x-2)^2+2 x=2
April 28, 2010

algebra
Would the vertex of f(x)= -(x+3)^2+4 be (-4,3)?
April 28, 2010

algebra
Thank you
April 28, 2010

algebra
Use the formula 4.9t^2 +vot=s, where t is the time in seconds, vo is the initial velocity, and s is the distance in meters. Approximately how far will an object fall in 4 seonds, if it is thrown downward at an initial velocity of 20 meters per second (vo) from a helicopter? Is...
April 28, 2010

algebra
I am totally lost on how to solve g(x)=2x^2+3x-1 to find the y and x-intercepts. This is what I have so far, but I don't know if I am on the right track. And if so what would be next? g(x)=2x^2+3x-1 =2x^2+3x -1 =(2x^2+3+6) +3-1
April 28, 2010

Math
solve using the quadratic formula. 3x^2/4 - 1x/4 - 1/2 = 0
April 27, 2010

Algebra
How would I write a quadratic equation having the given numbers as solutions 4i, -4i
April 25, 2010

Algebra
Can someone help me with this question? Use the discriminant to determine whether the following equations have solutions that are:two different rational solutions: two different irrational solutions: exactly one rational solution: or two different imaginary solutions. s^2-5s-6=0
April 25, 2010

algebra
Graphing Quadratic Functions Find any x-intercepts and the y-intercept. If no x-intercepts exist, state this g(x)=2x^2+3x-1
April 23, 2010

algebra
Thank you so much for your help
April 23, 2010

algebra
How do you solve the quadratic formula 9 over 8 - 2 =5 over x^2
April 23, 2010

algebra
Thank you for taking the time to help me out
April 23, 2010

algebra
How do you solve the quadratic equation 7x^2-5=0
April 23, 2010

college algebra
Quadratic formula solve 9 over 8 - 2= 5 over x^2
April 23, 2010

college algebra
Sorry, I did not see it posted the first time so I didn't think it worked.
April 23, 2010

college algebra
How do you solve the Quadratic equation 7x^2-5=0
April 23, 2010

algebra
Determine wheter each pair of equations represent paralle lines. Show work 3x=5y-2 10y=4-6x
April 23, 2010

algebra
Solve using the substitution method and state if the system has a solution. 4p-2q=16 5p+7q=1
April 23, 2010

com220
before someone can fix this for you, you need to cite it.If you dont it is still concidered plagiarised. include the authors last name, date after using their work.
February 3, 2010

algebra
i need help on dis question.
January 26, 2010

hca 270
I wish I could help you, but I am having the same problems in this class. this is my second time through this class.
January 14, 2010

physics
a person carries a 58kg package of books up a flight of stairs the length along the stairs is 24 meters the vertical height of the stairs is 12 meters how much work is done in raising the package I know the answer is 6800 J but how to get????
January 6, 2010

Chemistry
The pH of a nitric acid solution is 1.2. What is the concentration of nitrate ion in the solution? Any help would be greatly appreciated, Thank you!!
September 14, 2009

english
Can you help me find the predicate in this sentence Kerry is one of Irelands twenty-six counties.
August 31, 2009

COM 220 Axia college of University of Phoenix
A.P.A.
July 19, 2009

Chemistry
I'm quite confused with this process, by doing this I get approx. 26 but the actual answer should be approx. 6 :(
April 28, 2009

physics
using ideas of torque and center of gravity explain why a ball rolls down a hill
April 28, 2009

All core classes.
What were some 80's icons? I have a project that's on the most important political and environmental events in the U.S during the 80's. I want to make some titles, for each subject (i had an assignment for almost each class, excluding my elective and p.e), and I&#...
March 31, 2009

Systems of Inequalities-8th Grade Algebra
I D K!
March 12, 2009

Chemistry
Atoms stick together in bonds to form molecules. What is responsible for this sticking? Thank you.
March 4, 2009

History
I'm designing my energy transformation for my rube goldberg project, and i can't seem to figure out how to design some of them. How could i represent the american boycott of the moscow olympics, the soviet boycott of the Los Angeles Olympics, the signing of the INF ...
February 6, 2009

English
What's an idiom, simile, or metaphor for getting back at someone?
February 3, 2009

english
What is a simile, idiom, or metaphor for relief?
February 3, 2009

History
How did the Chernobyl disaster affect the U.S? Did it at all?
January 28, 2009

Physics
Two projectiles are launched form ground elvel at the same angle above the horizontal, and both return to groudn level. Projectile A has a launch speed that is twice that of projectile B. What are the ratios of the maximum heights of the balls? What are the ratios of the ...
January 4, 2009

Physics
A tennis ball is hit into the air and moves along an arc. Neglecting air resistance, where along the arc is the speed of the ball a)a minimum and b) a maximum? I'm thinking it's at a max at the begging and end, and a min at the top, but that's just a guess.
January 4, 2009

Math (Word Problems)
I need to know how to set up this problem: A salesman drives from Ajax to Barrington, a distance of 120 miles, at a steady speed. He then increases his speed by 10 mph to drive the 150 miles from Barrington to Collins. If the second leg of his trip took 6 minutes more time ...
November 30, 2008

physiology
this is an exact question on my physiology final. i'd like to know the answer too
November 19, 2008

MATH
The ratio of graduate students to undergraduate studaent at a certain university is 4 to9. if there are 2340 students at the university how many undgergraduates are there?
November 10, 2008

accounting
On April 1, 2008, Company issued $600,000, 9% bonds for $645, 442 including accrued interest. Interest is payable annually on January 1, and the bonds mature on January 1, 2018. So the way I started the entry was: April 1, 2008 DR Cash 645,442 CR Interest Payable (600,000 *.09...
October 3, 2008

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