# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,330 questions, page 776-
## physics

An air filled parallel plate capacitor has plates of area 0.0406 m^2 and seperation of 2.5*10^-6 m. a)What is the capacitence for the setup? b)Our capacitor is connected to a 550 v battery, how much energy is stored in the capacitor? c) If -1 mJ of work is

*asked by Kwang hu111 on February 9, 2008* -
## poetry

Who put the cat among the pigeons? Unfortunately we are unable to get hold of a copy of the book. Please can anyone help. put/set the cat among the pigeons (British & Australian) to do or say something that causes trouble and makes a lot of people angry or

*asked by dude on January 9, 2007* -
## algebra 1

There are 8 speaking roles in the play. Of the 8 speaking roles, 5 are for males and 3 are for females. After the 8 speaking roles in the play are cast, the remaining cast members will make up the chorus. C. What is the probability that the set of siblings

*asked by Gabs on June 2, 2015* -
## physics

An air filled parallel plate capacitor has plates of area 0.0406 m^2 and seperation of 2.5*10^-6 m. a)What is the capacitence for the setup? b)Our capacitor is connected to a 550 v battery, how much energy is stored in the capacitor? c) If -1 mJ of work is

*asked by jenish on February 7, 2008* -
## English

A question on my previous post: is that a mistake to say "he requested me to leave" Can't "request" be followed by "someone to do something"? Can I write the summary below in the present tense though the chapter is in the simple past? 1)The first person

*asked by Henry1 on May 12, 2011* -
## Government questions..

1 --In Japan, the process by which the prime minister can excuse the House of Representatives and trigger a general election is called? 2 -- How did Marx envision communism in its final form? 3 --from the states' point of view, what advantage did revenue

*asked by Jina on January 14, 2007* -
## Physics

A team of dogs drags a 151 kg sled 0.863 km over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.223.The acceleration of gravity is 9.8 m/s^2. 1. Find the work done by the dogs. Answer in units of

*asked by Emeera on March 15, 2014* -
## Chem

Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L

*asked by Lisa on December 30, 2014* -
## Physics/Calculus

It takes a force of 21,714lb to compress a coil spring assembly on a New York City Transit Authority subway car from its height of 8in to its fully compressed height of 5in. A. What is the assemblys force constant? B. How much work does it take to compress

*asked by Tim on May 2, 2014* -
## science

A sled is tied to a tree on a frictionless snow covered hill,as shown.If the sled weighs 77N ,1)Find the magnitude of the tension force T exerted by the rope on the sled .2)Find the magnitude of the normal force applied by the hill on the sled.MY WORK IS

*asked by ZENANDE on May 5, 2016* -
## math

Andy finished his job 50% more work then Ali in the same amount of time. Both of them take 10 hours to finish a job. How many hours Ali to finish the same job?

*asked by Anonymous on October 26, 2016* -
## Algebra

Stan and Hilda can mow the lawn in 20 minutes if they work together. If Hilda works twice as fast as Stan, how long would it take Stan to mow the lawn alone?

*asked by John's on February 16, 2016* -
## math

Two men and six boys can cut a field in 3 hours. If the men work at 3/2 times that of the boys, how many men are required to cut the field in 2hours?

*asked by jay on June 18, 2015* -
## maths

Two men and six boys can cut a field in 3hours. If the men work at 3/2 times that of the boys, how many men are required to cut the field in 2hrs.

*asked by jay on June 18, 2015* -
## math

Tomas calculates that he will need 86 hours to build a boat. He can work on the boat 8 3/5 hours per week. How many weeks will it taje Tomas to build the boat?

*asked by Anonymous on October 28, 2010* -
## Math

Write each of the fractions below as a division expression. Then write each fraction as a whole number or mixed number (I need help with this, because it confuses me as to how to write it as a division expression. Also sorry for no work saw.) 1. 5/4 2.

*asked by Ben on December 15, 2014* -
## Math

Gab and Van can mow the lawn in 40 minutes if they work together. If Gab works twice as fast as Van, how long does it take Gab to mow the lawn alone ?

*asked by Shane on November 24, 2015* -
## Physics

A 100-n boulder is sitting on a shelf 0.5 meters above the floor. If the boulder is moved vertically to another shelf 3.0 meters above the floor, how much work has been done on the boulder?

*asked by Nicole on October 15, 2008* -
## Calculus

Find the average value of the function f(x) 8x^2-9x+8 on the interval [3,5]. Find the value of the x-coordinate at which the function assumes it's average value The average value is ? the x-coordinate is ? Please help and showing work is much appreciated.

*asked by Anonymous on December 7, 2014* -
## Gen Chem II

You conduct another experiment on silver condensation. You add 8.0 g of silver nitrate to 200 mL of pure water. You attach a single 850 mAh AAA battery (at 1.3 V) to the electrochemical cell. You can assume that the entire battery charge is useable for

*asked by kyle on November 18, 2013* -
## algebra

summer begins from june 1st until august 31st. i can make $6.00 per hour working in a camera shop. $800 is the cost of living expenses. write equations for earning exactly $1000 and $2000 that include hourly wage and the cost of living expenses.solve your

*asked by eon on October 25, 2009* -
## Math Inequalities

b) Suppose you want to cover the backyard with decorative rock and plant some trees as the first phase of the project. You need 30 tons of rock to cover the area. If each ton cost $60 and each tree is $84, what is the maximum number of trees you can buy

*asked by Anonymous on October 8, 2009* -
## economics 11

The demand and supply schedules for milk are as follows: Price Quantity Demanded Quantity Supplied 10 0 125 8 20 95 6 40 65 4 60 35 2 80 5 a. On the same graph, draw the demand and supply curves. What does the demand curve for a product describe? What does

*asked by Anonymous on September 9, 2014* -
## FRENCH HELP URGENT!!

I really need to have this paragraph checked to see if there is any mistakes!! My tutor has been sick all week! Thank you! Montreal est une ville exceptionnel que vous aimeriez. Si vous aviez le temps, vous ne regretteriez pas votre decision. Montreal est

*asked by Jevette on January 19, 2009* -
## PHYSICS

1. to make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. a steel rivet 1.871 cm in diameter is to be placed in a hole 1.869 cm in diameter at 20 degree

*asked by JT on September 21, 2010* -
## Science-Astronomy

Using the equation speed=distance/time, calculate the speeds(in km/hour) of a geosynchronous satellite I'm given that the distance from this particular geosynchronous satellite is 36000km from Earth, and orbits Earth 24h. I can not understand how to solve

*asked by Anonymous on October 6, 2008* -
## Math

Mr. Smith bought shoes for $ 120 and a suit for $ 340. Find the total cost including tax if the tax rate is 5.5%. (a)$ 485.30 (b)$ 48.53 (c)$ 358.70 (d)$ 460 (e)$ 406 I cant figure out how to solve this problem but what i did was added the 120 and 340 and

*asked by Raymond on September 18, 2011* -
## Chemistry

I don't know if i am solving for the number moles of NaI correctly, i multiply .21 by 1.67, is that incorrect? i know that to solve this you have to find the limiting reagent, but i think the problem might be that i am solving for moles wrong. If 210 mL of

*asked by Tokey on April 20, 2010* -
## MATH

Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠. 1. seven-fifths and fifteen-tenths ( = ≠ 2. six-eighths and fifteen-twentieths = ≠ Solve each problem. 3. two-thirds equals twelve over x x = 18 x = 12

*asked by deborah on December 3, 2012* -
## physics help

The femur is a bone in the leg whose minimum cross-sectional area is about 3.60 10-4 m2. A compressional force in excess of 6.90 104 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. (b) What is the strain that exists

*asked by yoni on November 16, 2010* -
## Math

If a worker wants to pack 200 newly harvested mangoes at average size of 3"x2" in delivery boxes .To optimize the cost and profit in packaging , the mangoes must be properly packed in boxes of similar sizes. To systemize counting , there must also be equal

*asked by Claudette on August 17, 2014* -
## Chemistry

Tarnish on iron is the compound FeO. A tarnished iron plate is placed in an aluminum pan of boiling water. When enough salt is added so that the solution conducts electricity, the tarnish disappears. Imagine that the two halves of this redox reaction were

*asked by John on May 14, 2014* -
## Biology

I just need somone kind enough to confirm my answers. 1. Membrane bound organelles are also referred to as ... A) vesicles B) channels C) integral proteins D) a and b I think the probable answer is A. 2. Plasmolysis of human red blood cells would occur if

*asked by Angelinna on November 27, 2007* -
## Chemistry

The determination of 4.000 mmol of ZnCl2 is performed gravimetrically by the addition of NaCN solution in a Total volume of 200.00ml. Ksp = 3.0X10^-16 for Zn(CN)2. State and verify all assumption. Assume cyanide does not hydrolyze. a. Derive the COC and

*asked by WILL on December 22, 2012* -
## calculus

A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?

*asked by Steven on December 1, 2011* -
## Statistics

A firm has 82 employees. The average commute distance (that is, the travel distance from home to work) of the employees is 6.2 miles. How many employees have a commute distance of less than 15.5 miles? Select all that are correct. more than 25 more than 35

*asked by A on March 1, 2013* -
## chemistry

i am trying to find the average rate of h2? from mastering chemistry home work. part a answer was 0.027m/s and part b answer was 0.054m/s. i cant find part c home answer

*asked by Tasha on April 19, 2011* -
## chemistry / physics

the specific heat capacity of seawater is 3900 j/kg degrees celcius. how much energy is needed to heat 500g of seawater from 20 degrees celcius to 90 degrees celcius? if not i need to know how to work it out

*asked by freddie on October 3, 2010* -
## calculus

A metal chain weighs 30 lbs and is 10 feet long. How much work is required to lift one end of the chain to a height of 15 feet (so that the other end of the chain will be at a height of 5 feet)?

*asked by Anonymous on April 17, 2011* -
## math

Records from buzz's sawmill show that workers have a 0.02 probability of losing an arm and a 0.03 probability of losing a leg in a year. What is the probability that a worker does not lose an arm? What is the probability that worker does not lose and arm

*asked by Matt on May 18, 2012* -
## Advanced Math

The probability of getting 2 heads and 1 tail when three coins are tossed is 3 in 8. Find the odds of not getting 2 heads and 1 tail. ANSWER: 5:8? Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.?

*asked by Patrick on June 10, 2009* -
## Chemistry (URGENT)

Balance the following equations. 3. C12H22O11 + O2 = CO2 + H2O Answer: C12H22O11 + 12 O2 = 12 CO2 + 11 H2O 8. CH3OH + O2 = CO2 + H2O Answer: 2 CH3OH + 3 O2 = 2 CO2 + 4 H2O I balanced all the others just fine. But I seem to be having trouble with these two.

*asked by John on March 1, 2010* -
## History/admendment 5

Mr.Daly is running short on cash and needs to gas up his car. After filling his car up at the local gas station he takes off without paying. He is put on trial and somehow (miraculously for Mr. Daly) he is found innocent. The prosecution finds new evidence

*asked by Marcus on January 16, 2009* -
## Physics

A 5 g bullet has a speed of 300 m/s and embeds itself into a 500 g block. The block is initially at rest sitting on a rough surface which has a coefficient of kinetic friction equal to 0.5. A) What is the speed of the block after the collision? which is=

*asked by Melissa on October 15, 2015* -
## Business Math

Joyce took out a loan for $21,900 at 12 percent on March 18, 2000, which will be due on January 9, 2001. using ordinary interest, Joyce will pay back on January 9 a total amount of: Answer: $24,068.10 Ordinary interest is 360 March 18 = 77 days January 9 -

*asked by Liz on January 29, 2012* -
## math/science

I understand now how to do the + and - graph but how would i label the 2 axis. One is for temps but how would i show the objects/subjects? If i was doing + only i would put numbers up the side and object/subjects on the bottom line but with + and - numbers

*asked by nula on January 11, 2007* -
## PHYSICS - PLEASE HELP

A box of weight w=2.0 N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude n= 1.7 N, the coefficient of kinetic friction between the box and the plane is .30, and

*asked by Anonymous on November 30, 2012* -
## Physics

(a) At a certain instant, a particle-like object is acted on by a force F=(2.9N)i-(1.7N)j+(5.7N)k while the object's velocity is v= -(3.2m/s)i+(4.5m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the

*asked by Donnie on March 9, 2014* -
## Math

The floor of a round hut is 10m in diameter. A weaver charges $15.50 to make a mat to fit the floor . Find the cost of the mat per square meter . Work- area of a circle = 3.1 * 5*5=77.5 Cost per square meter =77.5\15.5= 5 cents per square meter

*asked by Amina on February 18, 2016* -
## chemistry

Please, can someone help? Evaluate log 1. This is my work up until I have gotten stuck: log 1 1=10^x I can't find a common base for 1 and 10^x. Wow, my apologies, this is algebra, not chemistry. but actually I think they use it in chemistry too... Take the

*asked by Darcy on April 10, 2007* -
## Algebra

A supervisor finds the mean number of miles that the employees in a 9the x has a line on top)department live from work. He finds X=2.9 and s=3. Which statement must be true? z376 is within 1 standard deviation of the mean. z37 is between 1 and 2 standard

*asked by Junior on July 18, 2014* -
## math

A certain medicine is given in an amount proportional to a patient’s body weight. Suppose that a patient weighing 100 pounds requires 125 milligrams of medicine. What is the weight of a patient who requires 200 milligrams of this medicine? I am totally

*asked by jessica on August 24, 2010* -
## physics

When an electron moves from A to B along an electric field line in Fig. 24-29, the electric field does 3.66 x 10-19 J of work on it. What are the electric potential differences (a)VB - VA, (b)VC - VA, and (c)VC - VB? in the picture there r four field lines

*asked by sweety on April 15, 2009* -
## General Physics

Suppose that the force on the block FT is increased so that the block accelerates (starting from rest) at a = 2.2 m/s2. Now what is the net work done by all the forces acting on the block as it moves a distance of 15 m? 1. Wnet = −1968.75 J 2. Wnet =

*asked by Charles on July 26, 2013* -
## math

A scale model racing car is 11 inches long, 3 inches wide, and 2 inches tall. The actual racing car is show at the right. How wide is the actual racing car?

*asked by Kim on February 28, 2012* -
## Chemistry

When Solid NaHCO3 was placed in a rigid container witha volume of 2.5L and heated to 160 degrees Celsius, the equilibrium was reached. 2 NaHCO3(s) -> Na2CO3 (s) + CO2(g) + H2O(g) At equilibrium, some of the starting material remains and the total pressure

*asked by lawerence on May 5, 2015* -
## Math

I recently inquired how to solve a right triangle. I was referred to the Laws o Sine & Cosine quite rightly. I have subsequently found a converter on the net which takes all the headache out of arriving at the correct answers. The thing is I still do not

*asked by Mike on October 28, 2006* -
## History

Please check my answers. Question 1(Multiple Choice Worth 5 points) [06.06 MC] Which answer best describes how the Supreme Court viewed Maryland's taxing of the national bank created after the War of 1812? The Supreme Court decided Maryland was within its

*asked by Anonymous on February 22, 2017* -
## Physics

A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 220N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (magnintude and direction)? Please show me how to do

*asked by Kelly on January 2, 2007* -
## Chemistry

I am supposed to create a "possible" mechanism for the reaction 2A + B --> 2C when the rate law is Rate=k[A][B]^2. This mechanism can include any letters (but must obviously include As, Bs, and Cs). Preferably it should be 3 or more steps including at one

*asked by Carrie on March 3, 2008* -
## number story

Hi I wanted to know what is a number story? a number story is a story that has a problem that you have to figure out the solution to figure out the answer to the number problem. I know it's a little confusing, but that's the best i can do!!! thank you very

*asked by rosa on September 28, 2006* -
## chemistry

You have 4.0 g of solid A, 100.00 mL of water (100.0 g of water), and the total mass of solid A combined with 100.00 mL of water is found to be 104.0 g. The mass percent of A in this solution is

*asked by eve on April 13, 2009* -
## Chemistry

You have 2.0 g of solid A, 100.00 mL of water (100.0 g of water), and the total mass of solid A combined with 100.00 mL of water is found to be 102.0 g. The mass percent of A in this solution is

*asked by Tasha on January 14, 2010* -
## chemistry

You have 4.0 g of solid A, 100.00 mL of water (100.0 g of water), and the total mass of solid A combined with 100.00 mL of water is found to be 104.0 g. The mass percent of A in this solution is ...

*asked by Katherine on January 10, 2010* -
## chemistry

You have 2.0 g of solid A, 100.00 mL of water (100.0 g of water), and the total mass of solid A combined with 100.00 mL of water is found to be 102.0 g. The mass percent of A in this solution is

*asked by eng on January 7, 2010* -
## Chemistry

How many grams of a solid mixture containing strontium chloride would one need to make 558 mL of a 0.100 M strontium chloride solution, if the solid mixture contains 58.6% strontium chloride by weight

*asked by Anonymous on February 24, 2017* -
## Chemistry

The pK3 of formic acid is 3.75 A)what is the pH of a buffer in which formic acid and sodium formate have equimolar concentration? B)what is the pH of a solution in which the sodium formate is 10M and the formic acid is 1M?

*asked by Liz on April 30, 2013* -
## Physics

4. In a shopping mall, two elevators pass each other moving in opposite directions. Each elevator to the other is 10 m/s. What is the velocity of each elevator relative to a person standing on the ground? One elevator has a velocity of 5 m/s and the other

*asked by Helga on August 27, 2018* -
## MATH

TRAIN A, TRAVELING 70 MPH, LEAVES WESTFORD HEADING TOWARD EASTFORD 260 MILES AWAY. AT THE SAME TIME TRAIN B TRAVELING 60 MPH, LEAVES EASTFORD HEADING TOWARD WESTFORD. WHEN DO THE TWO TRAIN MEET? HOW FAR FROM EACH CITY DO THEY MEET? SHOW OR EXPLAIN HOW YOU

*asked by ROSEMARY on January 26, 2010* -
## phsyics

A car races on a circular track of radius r. (a) Write an equation for the car's average speed when it travels a complete lap in time t. (b) The radius of the track is 100 m and the time to complete a lap is 14 s. Show that the average speed around the

*asked by price on March 19, 2014* -
## maths

a ladder rests against a wall at an angle alpha to the horizontal its foot is pulled away from the wall through a distance a so it slides at bita making an angle bita with the horizontal show that a upon b=cos alpha-cos bita upon sin bita-sin alpha?

*asked by anurag on January 9, 2012* -
## Infant and Toddler

What are some ways infants develop their language skills? Include some specific ideas for age appropriate toys,books,experiences. Angie and/or Jessica, Please note that we don't do students' homework for them. Our tutors try to give you the information to

*asked by Angie on August 20, 2007* -
## math help!!

A boat travels down the river in 2.9 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 30 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

*asked by lilly on February 22, 2013* -
## help math!!!

A boat travels down the river in 2.3 hours. The return trip up river takes 3.7 hours. A one way trip down or up river is a distance of 26 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

*asked by erin on December 13, 2012* -
## Physics

A particle accelerator called Large Hadron Collider can accelerate protons to 14 TeV (tetraelectonvolts) (1TeV = 10^12eV) of energy. What is the relativistic mass of a proton that has total energy of 14 TeV? (express your answer in MeV/c^2) Would I use E=

*asked by Abby on April 30, 2008* -
## MATH

Marys landlord raised her rent 25%.if her new rent is $500,how much did she pay before the increase? A.$375 B.$400 C.$425 D.475 FOR EACH ANSWER,CALCULATE WHAT THE PERCENT INCREASE WOULD BE IF THE RENT IS RAISED TO $500. WHAT STRATEGY DID YOU USE TO SOLVE

*asked by GOGO on June 10, 2007* -
## help math

A boat travels down the river in 3.0 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 23 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

*asked by erin on December 17, 2012* -
## chemistry

Hello, im having major issues with this problem...A 100.0-mL solution of 0.017 M CH3COOH (Ka = 1.8 10-5) is titrated with 0.025 M NaOH. Now, I've gotten some the answers all ready (right answers have *)....but three of them are wrong, can someone tell me

*asked by A person on October 12, 2011* -
## English

1. Each of you brings the photograph taken during the summer vacation. 2.After pasting the picture on a piece of paper, write down an explanation about the picture in English in brief. 3. After gluing the pictures on a big piece of drawing paper, hold a

*asked by John on August 29, 2008* -
## Math

Suppose you want to use hardwood flooring for most of a 750 square foot apartment. Labor costs are $250 plus a $2 feet per square foot of installation. The cost per square foot of hardwood flooring is $7.00. Write an inequality to show the square feet in

*asked by Helene on December 3, 2010* -
## Physics

1. The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in the pulley, and the connecting rope is very

*asked by Shelby on December 11, 2016* -
## science

A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls

*asked by Brian on January 30, 2007* -
## Reading Comp.

The modern hearing aid is, essentially, a miniature public-address system, which converts sound into electrical energy and then converts it back to sound again. A hearing aid can increase the sound level by sixty decibels or more, but it also distorts the

*asked by Arlynn on March 28, 2011* -
## Chemistry

A cell was constructed with two lead electrodes. The electrolyte compartment is 1 M Pb(NO3)2 (aq). In the other compartment, NaI has been added to a Pb(NO3)2 solution until a yellow precipitate forms and the concentration of I- ions is .5 M. The potential

*asked by Anonymous on February 28, 2014* -
## Chemistry

The oxidation of iodide ions by arsenic acid in acidic aqueous solution occurs according to the net reaction H3AsO4 + 3I – + 2 H3O +→ H3AsO3 + I3– + H2O. The experimental rate law for this reaction is Rate = k [H3AsO4] [I–] [H3O+]. According to the

*asked by Jenna on April 22, 2017* -
## Chemistry

Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution

*asked by Chu on July 10, 2008* -
## Chemistry

Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution

*asked by Chu on July 10, 2008* -
## Math (Check answers)

1. Which statement is an example of Identity Property of multiplication? A. 8x0=0 B. 8x1=8 C. 8x-1=-8 D. -8x-1=8 2. What is another way to write 3x(4+7)? A. 3x4+7 B. 3x4x7 C. 3x4+4x7 D. (3x4)+(3x7) 3. Which property is represented 5+(8)=8+5? A. Identity B.

*asked by Senpai onii-chan on August 18, 2016* -
## Pre algebra

How do I complete each ORDERED PAIR solution to the given equation? y=-x+9;(4),(9),(0) I looked up math ordered pairs at www.google.com, and these are the results. There may be a site in here with an explanation to help you.

*asked by Jaimz on June 8, 2007* -
## chemistry

In the course of research, a chemist isolates a new compound with an empirical formula C3H3O2. 4.97 g of the compound when dissolved in 100. g of water produces a solution with a freezing point of −0.325°C. What is the molecular formula of the compound?

*asked by Diana on September 8, 2010* -
## STATISTICS

Researchers asked questions in 1001 randomly selected adults in Russia. We found a statistically significant, strong positive correlation between income and the number of recycling bins filled their houses per week (r = 0,77). Choose the best

*asked by Marian on September 6, 2013* -
## Physics

The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.60 multiplied by 104 kg/s, with an exhaust speed of 2.55 multiplied by 103 m/s. (a) Calculate the thrust produced by these engines. answer should be in N (b) Find the

*asked by Force and Velocity on October 26, 2010* -
## chemistry

When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation

*asked by Suzanne on April 27, 2014* -
## Macro econ

Use the Keynesian model for this problem. Assume the following model of the economy, where c, t, and nx are positive constants: Y=C+Ip+G+NX C= 200 0 + c(Y-T) T= 400 + tY Ip = 1500 G = 2000 NX = 1000 - nxY where c=.75, t=.2, nx = .10 a) What is the

*asked by Ty on February 9, 2008* -
## math

The region R, is bounded by the graphs of x = 5/3 y and the curve C given by x = (1+y^2)^(1/2), and the x-axis. a) Set up and evaluate an integral expression with respect to y that gives the area of R. b) Curve C is part of the curve x^2 - y^2 = 1, Show

*asked by leess on March 2, 2008* -
## math

The region R, is bounded by the graphs of x = 5/3 y and the curve C given by x = (1+y^2)^(1/2), and the x-axis. a) Set up and evaluate an integral expression with respect to y that gives the area of R. b) Curve C is part of the curve x^2 - y^2 = 1, Show

*asked by PLEASE HELP! on March 2, 2008* -
## 12 data management

3 oeople - john joan and kim throw a ball to each other. there is a probability of 1/3rd that johnwill throw it to joan. probability of 1/2 that joan wil throw it to kim. probability of 1/4th that kim will throw it to john. A. show in a Markov chain as a

*asked by Linda on October 8, 2008* -
## physics help me bob!

A rock is thrown from the roof of a building with a velocity v0 at an angle α0. The height of the building is h. (i)Calculate the horizontal distance traveled by the projectile before it strikes the ground. (ii)Show that the speed of the rock just before

*asked by dt on December 2, 2012* -
## microbiology

can anyone help me to figure out how to work out STANDARD DEVEATION CALCULATIONS please? Do you have a specific example? There are formulas for standard deviation you can use if you are expected to do the calculations by hand. You can also use calculators

*asked by nicky on April 29, 2007* -
## Education

I need two articles detailing community service programs in any two public schools. I can find schools that onclude these sorts of programs, but they never give information on what sorts of projects they need to perform, the number of hours, or other

*asked by Ian on December 19, 2007*

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