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October 22, 2014

Posts by sam


Total # Posts: 4,034

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

Physics
Take the radius of the earth at the equator to be 6380 km a. Find the speed the speed of an object at the equator due to the earth's rotation. ___m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour
March 5, 2012

health 3 ms sue
d all of the above
March 4, 2012

MATH! :(
Yesterday, at a local restaurant, 60% of the customers ordered a burger. If 42% of the customers ordered a burger and fries, what is the probability that a customer who ordered a burger also ordered fries? If 15% of the customers ordered a burger and onion rings, what is the ...
March 4, 2012

Physics
A 10 kg block rests on a frictionless table and is whirled in a circle and kept in a radius of 1.6 m by a rope attached to a peg. What is the tension in the rope if the block has a linear speed of 18 m/s? __N
March 4, 2012

Physics
A Ferris wheel has a radius of 14 m. What period of rotation would give the occupants a feeling of "weightlessness" at the top? __s
March 4, 2012

math
8 9/10 minus 3 4/10 =
March 3, 2012

math
a school has purchased a large field that has a square area of 19,500 ft squared. what is the approximate length of each side of the square area?
March 3, 2012

math
5x-(2a^6•16b)= -3b(6a^2 -(5bx))
March 1, 2012

Geometry
In triangleRST, mangR = (2x + 10)­­°, mangS = (2x + 25)°, and mangT = (x – 5)°. Find the value of x.
March 1, 2012

physics
Ayesha exerts a force of 186 N on a lever to raise a 2.70 × 103-N object to a height of 29.0 cm. If the efficiency of the lever is 83.3 percent, how far does Ayesha move her end of the lever?
February 29, 2012

Chem II
thank you
February 29, 2012

Chem II
PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?
February 29, 2012

PHYSICS!! SOS
Determine the scalar product of A= 3.0i + 1.0j - 2.0k and B= 3.0i - 2.0j - 3.0k .
February 29, 2012

Science
A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?
February 29, 2012

Kinesology
A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?
February 29, 2012

Physics
In her physics lab, Stephanie rolls a 30 g marble down a ramp and off a table with a horizontal velocity of 2 m/s. The marble falls in a cup placed 0.4 m from the table’s edge. a. How long is the ball in the air? 0.2 s b. How high is the table? m
February 27, 2012

Math
A fisherman has estimated that it takes 6 minutes to paint each square foot of the hull of his boat? How much time should the fisherman allow for the painting of the hull, if the hull were composed of two sides, each 31.5 feet by 8.00 feet? Is the correct answer 50.4 hours?
February 25, 2012

probability problem
A box contains 6 green, 8 red, 5 yellow, and 10 blue marbles. Four marbles are drawn from the box at the same time. a) What is the probability that all four marbles are the same color? b) What is the probability that none of the marbles is blue? c) What is the probability that...
February 24, 2012

Orgo
Thank you I was able to work it out: it's a 1:1 ratio so since 5.5g chlorophenol is .043 mols, nitric acid must be .043 mols as well. V(1.20M) = .043mol V= .036L
February 24, 2012

Orgo
What volume of 1.20 M nitric acid is needed to convert 5.5g of m-chlorophenol to 3-chloro-2,6-dinitrophenol? I So far I have converted the 5.5g chlorophenol to mols and I got .043 mol. I know Volume * Molarity (1.2M)=moles. At this point I am stuck.
February 24, 2012

US Government
What should be the goals of the US government today? I have to write an essay with this very question but I need help to formulate at least 4 different topics that the US Government should focus on.
February 24, 2012

math
jeremy has 19 coins of 2 different values. the total value of coins is 1$ what are the coins and how many of each coins does he have
February 23, 2012

Anatomy
I need a site that has a labled picture of what parts are found in the knee joint when disecting a fetal pig
February 23, 2012

physics
A water-skier lets go of the tow rope upon leaving the end of a jump ramp at a speed of v1 = 14.7 m/s. the skier has a speed of v2 = 12.7 m/s at the highest point of the jump. Ignoring air resistance, determine the skier's height H above the top of the ramp at the highest ...
February 20, 2012

Precalculus
find roots of w^(4)+2^(3)+3^(2)+4w-52=0
February 20, 2012

Animal Science
what time of the year do feral cats usually mate?
February 20, 2012

spanish
Completa las oraciones con la forma correcta de cada verbo. 1. En bicicleta podemos explorar el parque sin _____(caminar) demasiado. 2. Mis hijos van a dejar todo limpio antes de ____(salir) del parque. **I have tried every possible form of verb conjugation and I can't ...
February 18, 2012

math
I have to make a line segment that is 5000mm long I have no idea how long Can u help me?
February 16, 2012

english
"#1 Crush" - Garbage Local God - Everclear "Angel" - Gavin Friday "Pretty Piece of Flesh" - One-Inch Punch Kissing You (Love Theme from Romeo + Juliet) - Des'ree – "Whatever (I Had a Dream)" - Butthole Surfers Lovefool - The ...
February 12, 2012

english
i need to chose at least 8 songs and how they relate to romeo and juliet acts so i can make a soundtrack. thanks
February 12, 2012

english
how do i create a eight song soundtrack
February 12, 2012

english
"#1 Crush" - Garbage Local God - Everclear "Angel" - Gavin Friday "Pretty Piece of Flesh" - One-Inch Punch Kissing You (Love Theme from Romeo + Juliet) - Des'ree – "Whatever (I Had a Dream)" - Butthole Surfers Lovefool - The ...
February 12, 2012

economics
econ
February 10, 2012

Chemistry
Okay, so I have to find the percent of water in each solution, but it involves different reagents and I'm not sure how to figure it out. Here's one example: Add all together - 4 mL water 2 mL of 0.01 M aqueous NaOH 2 mL acetone 2 mL 0.1 M alkyl halide in acetone How do...
February 9, 2012

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