Monday
September 1, 2014

Posts by Ana


Total # Posts: 965

math
At a production level of 1400 items, the total cost is $7250 and the marginal cost is $25. Use this information to estimate the costs of producing the following number of items. Your answers should be whole numbers. a) 1401 items . b) 1399 items . c) 1450 items .
October 8, 2010

algebra
this is probablt really simple, but for some reason I can't find out how to do it... solve for b; 2a/bc= 12 (show your work)
October 8, 2010

AP Chemistry
I don't understand that, can you explain it more fully?
October 6, 2010

AP Chemistry
for BF3 and CH4
October 6, 2010

AP Chemistry
How do I calculate orbital hybridization?
October 6, 2010

PHYSIC
An airplane flies north at a speed of 150 km/h relative to the air through which it flies. If there is a tail wind of 50 km/h, what is the plane's velocity relative to the ground?
October 6, 2010

PHYSIC
If a blue car drives 10km/h across the deck of an ocean liner that is traveling at 90km/h, what is the blue car's speed relative to the surface of the water when it drives toward the front of the ocean liner?
October 6, 2010

6th grade social studies
unscramble artiotinm
September 27, 2010

chemistry
urgent help needed!!! what is .0966 rounded to 2 significant digits? and why?
September 22, 2010

science
we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances together in test tube. Than ...
September 22, 2010

chemistry
this is over significant digits. -Indicate how many significant figures are in each of the following measurements: e) 4.0 X 10-5 kg i got 1 significant digit, but i'm not sure it if it's right... (& i can't ask my teacher, the situation is complicated)
September 21, 2010

science
thanks a lot -.- i can use search engine too -.-"
September 21, 2010

science
we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances together in test tube. Than ...
September 21, 2010

calculus
What is the answer?
September 21, 2010

science
we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances together in test tube. Than ...
September 20, 2010

english
what were the two images paine uses in the first 10 lines of the crisis. what kinds of poeple does paine identify thes images? why are these images appropriate
September 16, 2010

Chemistry
Thank you so much for your help.
September 15, 2010

Chemistry
So the water molecules fit in between the alcohol molecules? or do they attach to the structures?
September 15, 2010

Chemistry
So the water molecules fit in between the alcohol molecules? or do they attach to the structures?
September 15, 2010

Chemistry
Water is a small molecule consisting of 3 atoms joined together. (they give the structure of H20. Alcohol is a large molecule consisting of 9 atoms joined together. (they give alcohol structure) using this information make a hypothesis that explains the decreased volumes found...
September 15, 2010

history
It was basically so they could check the power. No one group would have total control. The Congress can't pass laws without going through the president, and the president can't pass laws without passing it through Congress. The same goes for the Judicial branch except ...
September 15, 2010

Chemistry
I thought so too. I was right. :)
September 15, 2010

Chemistry
Assume you have a 50 L barrel full of basketballs and a 50 barrel of tennis balls. If you dump both barrels full of balls into a 100 L barrel, will the barrel be full?
September 15, 2010

..
ooh and why?
September 12, 2010

..
which variable is the dependent variable?
September 12, 2010

10th grade math
how do i solve for y in the equation -5y(6y - 6) - y = -4(y - 5)
September 3, 2010

suffixes
answer the question with a complete sentence that uses a word from the spelling list. add a sufix to the underline word to create the correct word. Does Herb resemble his brother? the word from the spelling list is "rehearsal"
September 2, 2010

algebra
-2 2/3 ÷3 ? 5(-2.4) multiply or divide.then compare using <,>,=
September 1, 2010

algebra 8
oww ...so its < cazz i'm kind of confusee about this two <>
September 1, 2010

algebra 8
mm is it > ??
September 1, 2010

algebra 8
multiply or divide. Then compare using <,>, or = 10(-1/2) ? 20÷4 can some on do it 4 me please
September 1, 2010

science
ohh thanks
September 1, 2010

science
i mean inertia
September 1, 2010

science
what does intertia means?
September 1, 2010

Math
How many seven-digit numbers less than 1,048,000 can be made using the digits 0,1,4,6,7,8, and 9? Make a list of possible ways to represent your seven-digit numbers.
September 1, 2010

algebra 8
A. 1165 B.920 its that the answer?
August 31, 2010

algebra 8
please some one
August 31, 2010

algebra 8
business. A restaurant manager lost $415 in business during the month of january . business picked up in February, and he ended that month with a profit of $1580 A. What was the manager's profit after January and February? B. What if...? The restaurant lost $245 in ...
August 31, 2010

algebra 8th
so whats the answer?
August 31, 2010

algebra 8th
it da answer - 19/40???
August 31, 2010

algebra 8th
i gat 16/40 and 35/40 so do i have to subtract 35-16?? or what???
August 31, 2010

algebra 8th
mm i guess
August 31, 2010

algebra 8th
now i dont understand this one Add Or SSubtract 2/5 - 7/8=?? what do i have to do?
August 31, 2010

algebra 8th
Thanks
August 31, 2010

algebra 8th
-4.7-(-4.7) = 0 ???
August 31, 2010

Spanish
k es lo k tratas d preguntar?
August 31, 2010

science
the Nucleus controls the whole cell. It's known as the "brain".
August 31, 2010

algebra check
because it would be the same answer and the smart one that i asked said that it was right..da!!
August 31, 2010

algebra check
o really o woow thanks
August 31, 2010

algebra check
its it right or wrong???
August 31, 2010

algebra check
add or subtract, -8-3 -8-3= -8+(-3) 3+8= -11
August 31, 2010

social studies
ohh i know!!!=) ama 8th grader xd
August 31, 2010

algebra
its diamond problem ok
August 31, 2010

algebra
i dont know how to do this 1/2> on the top is??? on the right 1/2 on the butttomm?????
August 31, 2010

Spanish
oww ok ama stu;;;;id
August 30, 2010

Spanish
mm no entiendo.. k kieres decir??
August 30, 2010

vocabulary
mm i dont know
August 30, 2010

vocabulary
whats the meaning of ..The more i stretch and exercise, the more flexible my joints become....i need the context clue..please
August 30, 2010

Chemistry
A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. Based on these observations, can we ...
August 29, 2010

chemistry ?
If fire is exposed to pure oxygen the reaction for fire would occur more dramatically (like a burst of flames).
August 29, 2010

chemistry
0.46 mol NH4NO3 * 1 mol N2O/1 mol NH4NO3 = 0.46 mol N2O 0.46 mol N2O * 43.99 g N2O/1 mol N2O = 20.24 g N2O
August 29, 2010

algebra
4x+4y=7 4(0)+4y=7 0+4y=7 4y=7 now divide to solve for y y=7/4 4x+4y=7 4x+4(0)=7 4x=7 now you divide for x x=7/4
August 24, 2010

algebra
many pounds of each should be mixed together in order to get 240-lb mixture that is 7% portein how many pounds of the cornmeal should be in the mixture? How many pounds of the soybean meal sould be in the mixture?
July 27, 2010

Chemistry
If your sample contained a volatitle impurity, what value would be in error, the weight of the anhydrous salt or the weight of the water? Please explain. Thank you
July 22, 2010

Chemistry
Write formulas for the following compounds containing complex anions. rubidium hyponitrite magnesium bromite
July 22, 2010

Chemistry
What is the name of the following compounds; Hg2(BrO2)2 Au(OCN)3 AuSCN Ni3(AsO4)2 Thank you
July 22, 2010

Physics Check
An airplane flies north at a speed of 150 km/h relative to the air through which it flies. If there is a tail wind of 50 km/h, what is the plane's velocity relative to the ground?
July 12, 2010

Physics Check
A motorboat travels at a speed of 40 km/h relative to the surface of the water. If it travels upstream against a current of 12 km/h what is the boats speed relative to the shore?
July 12, 2010

algerba
simplify the expression -10xy - 15y / 5y -10xy -3y^2 is my answer rigth or wrong
July 12, 2010

algerba
which is the simplest form of the radical expression sqrt (10)+6sqrt(10)+-3sqrt(10)
July 12, 2010

Math (Algebra)
divide the numerator by 4. Divide the denominator by 4.
July 10, 2010

Algebra 2
it's fine i already figured it out. thank you for your help. :)
July 10, 2010

Algebra 2
How do I solve this radical equation? 3 + (2x√3) = 5
July 10, 2010

math
slope= 2x y-intercept= -5
July 10, 2010

Algebra 2
What would the expression x^-6/11 be simplified?
July 10, 2010

Chemistry
I did your other one.
July 10, 2010

Chemistry
13.6 g Hg/cm^3 * 10 cm^3 The cm^3 cancels out and you get 136 g Hg. 136 g Hg * 200.59 g Hg/ 1 mol Hg = 0.68 mol Hg. 0.68 mol Hg * 6.02*10^23 atoms Hg/ 1 mol Hg= 4.08*10^23 atoms Hg
July 10, 2010

Chemistry
19.3 g/1 cm^3 * 1 lb/453.59 g =0.043 lb/cm^3 The grams cancel out. 0.043 lb/cm^3 * 28317.02 cm^3/ft^3=1217.63 lb/ft^3 1217.63 lb/ft^3 = 1.21 lb/ft^3
July 10, 2010

Algebra 1
In a 30-60-90 triangle, if they give me b=15, what would be a & c?
July 10, 2010

Geometry
I have a 45-45 special right triangle who's hypotenuse is 12, how do I find the other two side lengths?
June 30, 2010

Algebra 1
What's the answer to [(x-2)(x+2)/x(8x+3)]*[2(8x+3)/(x-2)] is it 2x+4/x or 6?
June 30, 2010

Algebra 1
what's the LCM of: 2r-1 , r+4
June 30, 2010

Algebra 1
Is this correct? (3m^2/2n )* (n^2/12) = m^2*n/8
June 30, 2010

Algebra 1
Is this correct? (3m^2/2n )* (n^2/12) = m^2*n/8
June 30, 2010

chemistry
calculate the molarity of each of the following solution: 2.00 mol glucose in 4.00 L solution.
June 25, 2010

chemistry
why is C4H10 the simplest alkane that can have structural isomers?
June 25, 2010

chemistry
Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
June 25, 2010

chemistry
calculate the molarity of each of the following solution: 2.00 mol glucose in 4.00 L solution.
June 25, 2010

chemistry
which of the following molecules can have optical isomers? a. CH2Cl2 b. H2NCH(CH3)COOH c. ClCH(OH)CH2Cl is b and c
June 25, 2010

chemistry
CH3-CH=CH2-CH2-CH2-CH3 CH3
June 25, 2010

chemistry
draw the structural formula of 2-methyl-2hexene?
June 25, 2010

chemistry
why does 2-butene have cis and trans isomers but 1-butene doesn't?
June 25, 2010

chemistry
why is C4H10 the simplest alkane that can have structural isomers?
June 25, 2010

chemistry
Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
June 25, 2010

chemistry
Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2
June 25, 2010

chemistry
carbon disulfide and carbon monoxide are produced when carbon is heated with sulfur dioxide. 5C(s)+2SO2(g)-CS2(I)+4CO(g) a. how many moles of C are needed to react with o.500 mol SO2? 0.500mol SO2 x5C/2SO2=1.25C
June 24, 2010

chemistry
would you tell me please are the answers corect?
June 24, 2010

chemistry
determine the correct answers to the calculation shown below to the correct number of significant figures? a. (32.453)(34.23+1.17)/(2.26-1.811)(0.00378)=9.671716784=9.7 b. (3.23+0.0018)=3.2318=3.2 c. (82.97-0.012)/(1.100)(21.9)=1651.618364
June 24, 2010

chemistry
determine the correct answers to the calculation shown below to the correct number of significant figures? a. (32.453)(34.23+1.17)/(2.26-1.811)(0.00378)=9.671716784=9.7 b. (3.23+0.0018)=3.2318=3.2 c. (82.97-0.012)/(1.100)(21.9)=1651.618364
June 24, 2010

chemistry
what is the explanation of 0.01M acetic acid ?
June 24, 2010

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