Sunday
November 23, 2014

Posts by sam


Total # Posts: 4,070

culture
Mutually Assured Destruction" is a policy based on which game theory strateg
May 20, 2012

Calculus
HOw do I find the domain of f(x)= x^2+3x+5?
May 18, 2012

Chemistry
Pb(NO3)2(aq) 2 x 10-3 M and Na2SO4(aq) 2 x 10-3 M Identify the ions that are present in each solution, and calculate their concentrations. If 1 L of each solution are mixed, will a precipitate be formed? Why?
May 16, 2012

Chemistry
Pb(NO3)2(aq) + NaSO4(aq) → PbSO4(s)+ 2NaNO3(aq) Identify the ions that are present in each solution, and calculate their concentrations.
May 16, 2012

geometry
89
May 14, 2012

geometry
12
May 14, 2012

math
solve equation. 2p^2-50=0 PLEASE HELP
May 7, 2012

Math
multiply: -4x^3(6x-3x^4) show your work. please help me!!
May 2, 2012

MATH
When adding or subtacting polynomials, what is very important to remember? PLEASE HELP
May 2, 2012

Math
what is 18x^5+3x^3+6x after it is divided by 3x? show your work. PLEASE HELP MEEE
May 2, 2012

Math
What is the result when (4x^2-5x+7) is added to (x^2-3x-6)? show your work. PLEASE HELP ME!!
May 2, 2012

Math
multiply: a)(2x+5)(2x-5) b) -4x^3(6x-3x^4) show your work. please help me!!
May 2, 2012

Math
what is the result when 2x^2+3xy-6 is subtracted from x^2-7xy+2? show your work. please help me!
May 2, 2012

Mathematics
ok but could you give me an example of what state in terms of h means
May 2, 2012

Mathematics
a cuboid with length 13cm width 4cm and height h State in terms of h the shaded face of the cuboid. write an expression in terms of h for the volume of the cuboid. if the volume of the cuboid is 286cm cube calculate the height h of the cuboid.
May 2, 2012

trig
I don't understand how to fnd it though Reiny :( perhaps you could help?
April 30, 2012

trig
Determine whether the vectors are parallel, perpendicular or neither. 1) v = (4,1), w = (1,-4) 2) v = (2,3), w = (4,6) 3) v = (2,3), w = (3,-3) Please and thanks!
April 30, 2012

trig
Find the component form for vector v with the given amplitude and direction angle theta. |v|=20.6, theta=102.5deg
April 30, 2012

trig
Find the dot product of u and v u= 3i+7j v= 11i-5j
April 30, 2012

MATH
What is the measure of each angle in a Googolgon
April 30, 2012

Statistics
Suppose it can be assumed that 60 percent of adults favor capital punishment. Find the probability that on a jury of twelve members: a) All will favor capital punishment. b) There will be a tie.
April 30, 2012

Mathematics
how to find the length of a triangular prism? when the volume is 1470cm cube the height is 10.5cm base 14cm
April 30, 2012

algebra 2
Sorry, that wasn't one of the choices!!!! Hopefully someone who knows their algebra can help me answer it correctly :-)
April 27, 2012

algebra 2
Graph the equation. Identify the vertices, co-vertices, and foci of the ellipse. 64x^2+16y^2=1024 This is what i have so far vertices (0,8)(0,-8) foci(0,4√3),(0,-4√3)
April 27, 2012

algebra 2
Graph the equation. Identify the vertices, foci, and asymptotes of the hyperbola. Y^2/16-x^2/36=1 I think....vertices (0,4),(0,-4) foci??? asymptotes y=+/- 2x/3
April 27, 2012

algebra 2
Write an equation of the hyperbola with vertices at (–7, 0) and (7, 0) and foci at (–9, 0) and (9, 0)
April 27, 2012

algebra 2
Write an equation of an ellipse with center at (0, 0), co-vertex at (-4 , 0), and focus at (0, 3). I think its... X^2/16+y^2/9=1
April 27, 2012

algebra 2
Write an equation of the hyperbola with foci (0, -2) and (0, 2) and vertices of (0, -1) and (0, 1).
April 27, 2012

algebra 2
Write an equation of the ellipse with center at (0, 0), vertex at (4, 0), and co-vertex at (0, 2)
April 27, 2012

algebra 2
Thank you very much!!
April 27, 2012

algebra 2
A swimming pool in the shape of an ellipse is modeled by x^2/324+y^2/196=1, where x and y are measured in feet. Find the shortest distance (in feet) across the center of the pool? i think its 28 feet....
April 27, 2012

algebra 2
Thank you :-)
April 27, 2012

algebra 2
What is the equation of an ellipse with a vertex of (0, 3) and a co-vertex of (-2 , 0)? i think its 9x^2+4y^2=36...not sure
April 27, 2012

algebra 2
Is it (0,±6)?
April 27, 2012

algebra 2
Thank you again.
April 27, 2012

algebra 2
Write an equation in standard form for the hyperbola with center (0,0), vertex(4,0) , and focus (8,0). 1) x^2/64-x^2/16=1 2)x^2/16-y^2/64=1 3)y^2/48-x^2/16=1 4)x^2/16-y^2/48=1
April 27, 2012

algebra 2
That isn't one of the choses... 1) x^2/64-x^2/16=1 2)x^2/16-y^2/64=1 3)y^2/48-x^2/16=1 4)x^2/16-y^2/48=1
April 26, 2012

algebra 2
Write an equation in standard form for the hyperbola with center (0,0), vertex(4,0) , and focus (8,0).
April 26, 2012

medical transcription
Im working on a transcription and i know this sentance is not right but i cant figure out how to spell it correctly can any one tell me what it is or how to spell it so i can look it up thx what i need help on is the last word heart regular rate and rhythm normal S1, S2 ...
April 26, 2012

algebra 2
When you spend $1 at the grocery store, the store doesn’t keep all of your money as profit. Some of it is reinvested in the economy when the grocery store buys more merchandise from suppliers. In turn, the suppliers don’t keep all of that money as profit, either; ...
April 24, 2012

chemistry
Compare and contrast the ideas of heat and temperature. Explain how one affects the others and why they are not the same thing.
April 23, 2012

Algebra
Window World, Inc. is responsible for designing windows for the expansion of the campus chapel. The current design is shown in the figure. The metal trim used to secure the perimeter of the frame is 126 inches long. If the maximum window area is desired, what will be the ...
April 23, 2012

trig
find the math product of u and v u= (6,7) v= (-3,9)
April 23, 2012

MAth
A 13 foot ladder is resting against the wall. The bottom is initially 10 feet away from the wall and is being pushed towards the wall at a rate of 0.25 ft/sec. How fast is the top of the ladder moving up the wall 20 seconds after we start pushing? Hint: the hypotenuse (ladder...
April 22, 2012

pre-calc
tanx= -12/5 x in Q 2. find sin2x= cos2x= tan2x=
April 21, 2012

Stats
A random sample of n=500 households in a certain metropolitan area revealed that 150 have combined cable, phone and internet service. a.Calculate p-hat, the sample proportion of households having such service. b.Calculate a confidence interval for π, the proportion of all...
April 21, 2012

Physics
The ceiling of a classroom is 3.75 m above the floor. A student tosses an apple vertically upward, releasing it 0.5 m above the floor. What is the maximum initial speed that can be given to the apple if it is not to touch the ceiling?
April 21, 2012

algebra 2
When you spend $1 at the grocery store, the store doesn’t keep all of your money as profit. Some of it is reinvested in the economy when the grocery store buys more merchandise from suppliers. In turn, the suppliers don’t keep all of that money as profit, either; ...
April 21, 2012

Science
Why are x-rays uneffected my electric and magnetic fields. Please help me to understand this. I think that x-rays are unefected because each has a different wavelength of radiation. These different wavelengths cause no effect.
April 20, 2012

Mathematics
Express 3x squared + 2x + 1 in the form a(x+p)squared + q where a,p and q are real numbers
April 20, 2012

Mathematics
Express 3x squared + 2x + 1 in the form a(x+p)squared + q where a,p and q are real numbers
April 20, 2012

chemistry
34
April 19, 2012

chemistry
Assuming that the temperature and quantity of a gas sample remain constant, what will be the final pressure of 1.6 L sample of gas originally at 330K and 4.84 atm, when the volume is reduced to 840 mL?
April 19, 2012

Mathematics
95 mins
April 19, 2012

Mathematics
a bus travelled at at average speed of 54km/hour from lape town to cape town calculate in km the distance from lape to cape town
April 19, 2012

algebra 2
When you spend $1 at the grocery store, the store doesn’t keep all of your money as profit. Some of it is reinvested in the economy when the grocery store buys more merchandise from suppliers. In turn, the suppliers don’t keep all of that money as profit, either; ...
April 18, 2012

spanish
¿Te gusta el nuevo portátil? No, prefiero la vieja. No, prefiero los viejos. No, prefiero el viejo.
April 18, 2012

spanish
Escribe pero, sino o sino que en el espacio. Escribe solamente la palabra que falta 1)No veo a tu primo, ____ a tu padre. 2) Esa tienda vende muy buenos productos ____ son caros. 3)No les gustan los videojuegos ____ los juegos de mesa. 4) Las pilas no son caras ___ baratas. 5...
April 18, 2012

Geometry
38
April 18, 2012

Geometry
A right prism has bases that are squares. The area of one base is 81 square feet. The lateral area of the prism is 144 square feet. What is the altitude of the prism.
April 18, 2012

Chemistry
78 mL of a 1.60M solution is diluted to a volume of a 238mL. A 119-mL portion of that solution is diluted using 133 mL of water. What is the final concentration
April 13, 2012

Chemistry
What volume of 85% H3PO4(d=1.68g/mL) and weight of KH2PO4 are required to prepare a buffer of pH=3 that has an ionic strength of 0.2?
April 13, 2012

math
can you show me step by step how to factor 15x^2-14x-8
April 11, 2012

math
A stack of 24 workbooks weighs 14 2/5 lb. How much does each workbook weigh?
April 11, 2012

chemistry
You have a 1 L container of a gas O 2 at 20°C and 1 atm. Subtracting the weight of the container, what is the mass of the gas?
April 9, 2012

Chemistry
Need help with AP chemistry, specifically Acids and Bases The acid ionization constant, Ka, for propanoic acid, C2H5COOH, is 1.3  10 -5 . (a) Write the expression for the acid-dissociation constant, Ka for propanoic acid. (b) Calculate the hydrogen ion concentration, [...
April 9, 2012

Chemistry
Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to 483 K, and 3.72 ...
April 9, 2012

Chemistry
SO this is my first time doing this... lol i need help on an AP chemistry question for equilibrium. A 0.500 L tank contains 3.00 g of NO(g) at 750. K. The equilibrium constant for the reaction below at this temperature is 3.4 x 10 -3 2NO(g) ⇌ N2(g) + O2(g) (a) write the ...
April 9, 2012

Chemistry
How many mL of .175M H3PO4 are needed to neutralize 15.00mL of .33M NaOH?
April 8, 2012

Chemistry
How many mL of .48 M NaOH are needed to react with 2.00 moles of H3PO4?
April 8, 2012

math
help with convert franction to percent 29/50 and 42/50
April 2, 2012

math
there are fewer than 6 dozen eggs in a basket. If I count them by 2's there is 1 left over. If I count them by 3's there are 2 left over Three are left if I count by 4s. Four are left if I count by 5s. how many egs are there
March 31, 2012

Chemistry
If I react a phosphorus ylide with trans-cinnamaldehyde, what would the ratio of trans-trans to cis-trans isomer would I likely get?
March 30, 2012

Business
How does poverty affect the economy?
March 28, 2012

ps 189
if a aluminum can has a radius of 10cm and a height of 20 cm. how many square cm of aluminum does it take to make such a can.
March 25, 2012

Math
Suppose that you select 2 cards without replacement from an ordinary deck of playing cards. a) If the first card that you select is a heart, what is the probability that the second card that you select is an heart? b) If the first card that you select is an ace, what is the ...
March 23, 2012

math
Suppose that you select 2 cards without replacement from an ordinary deck of playing cards. a) If the first card that you select is a heart, what is the probability that the second card that you select is an heart? b) If the first card that you select is an ace, what is the ...
March 21, 2012

probability
Suppose an unfair coin comes up heads 52.2% of the time if it is flipped. If the coin is flipped 26 times, what is the probability that: a) it comes up tails exactly 12 times? b) it comes up heads more than 22 times?
March 21, 2012

chemistry
What is the pH of a solution if 100.0 mL of the solution is 0.23 M with respect to acetic acid and contains 1.71 g of sodium acetate, NaCH3CO2?
March 18, 2012

Math
x(x+4)^(2/3) a). Find the second derivative b). Find any points of Inflection c). Determine the intervals of Concavity
March 17, 2012

Math
Find a unit rate for number of parts manufactured per hour if 1628 parts are made in seven hours round to the nearest integer
March 15, 2012

Biology
Music Video Project Biology? Hey! So I am doing a music video project for AP Biology, and my topic is Gene Regulation. I want to know what should be the most important things I should include in my song, and what song I should use (80's/90's/Current) to parody for this...
March 14, 2012

science
Let us suppose the mass of iron be x.
March 13, 2012

Music Video Project
Hey guys! I am in a bit of a dilemma. I am doing a music video project for my AP Biology class and My topic is GENE REGULATION! I have no clue what to sing for it. What could be a good chorus? hook? What should be the most important to include in my song about the topic? Thanks!
March 13, 2012

math
After school, Chase spends 20 min reading, 30 min practicing the piano, 15 min cleaning his room, and 40 min doing his homework. Chase is busy for 105 min.What fraction of the time does he spends cleaning his room?
March 12, 2012

PHYSICS
Find the force of attraction on a 3 kg mass at the surface of a planet given the following information about the planet: mass = 5.98 x 10^24 kg, radius = 6.38 x 10^6 m. Find the force if the radius is doubled to 12.76 x 10^6m Thanks!!
March 10, 2012

Physics
Please help! I've tried several times on my calculator and I can't get it right! Find the force of attraction on a 3 kg mass at the surface of a planet given the following information about the planet: mass = 5.98 x 1024 kg, radius = 6.38 x 106 m. Find the force if the...
March 10, 2012

Physics
An asteriod is found a distance from the sun equal to 32 units times the earth's distance. What will be the length of time in years required for this asteriod to make one revolution around the sun?
March 10, 2012

Math
Divide = 5 hrs
March 8, 2012

math
Does anyone have any ideas
March 8, 2012

math
Need to make a problem, using parentheses and use as many operations to write an expression equal to to th target number. You can only use each number once in an expression. Numbers 6,7,12,14,20 Target number = 41
March 8, 2012

physics
A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.51 that on Earth?
March 7, 2012

Chemistry
A buffer is prepared by mixing 0.30 mole of formic acid (HCNO2) and 0.20 mole of sodium formate (NaCHO2) in enough water to make 0.50 liter of solution. Ka of formic acid is 1.7 x 10-4. Calculate the pH of the resulting buffer solution.
March 7, 2012

4th grade math
what is 1 4th of 10
March 6, 2012

Math
14 1/2 - 5 1/4 =
March 6, 2012

Math
3 1/6 - 1 1/3 =
March 6, 2012

Math
Rounding each mixed # to nearest whole #. 1 7/8 - 2 1/4 Plz explain answer, thx
March 6, 2012

Math
How to solve- |-4(7-x)|=3
March 6, 2012

Math
4 3/7 + 7 1/2 = Thanks
March 6, 2012

math
david wants to buy a motorcycle for2500. He has no money in his savings. He gets a job where he earns $50 an hour. how many 8 hour work days will it take to reach his goal of 2500? Must write an equation to represent the situation then solve and explain.
March 5, 2012

Pages: <<Prev | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Next>>

Search
Members