# 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

91,718 questions, page 676
1. ## Chemistry

Consider the following reaction occurring at 298K BaCO3(s)-> BaO(s) + CO2 (g) show that the reaction is not spontaneous under standard condition by calculating delta G rxn. I calculated delta G and got 219.7 kJ, now the question asks if BaCO3 is placed in

asked by Trista Nigh on April 24, 2011

A business is considering two sizes for its new warehouse: small and large. An analysis of the profits realized given two states of demand, low and high, are summarized in the table below. Figures are in tens of thousands of dollars per month Demand Low

asked by STEVE on September 7, 2010
3. ## math (calculate speed)

A swimmer of mass m is at a swimming pool. They climb the steps to the diving board 4.0 m above the water. They jump off the board, which enables them to rise a further 0.7 m before they begin their descent into the pool. At what speed do they enter the

asked by AMT on January 8, 2013
4. ## math (calculate speed)

A swimmer of mass m is at a swimming pool. They climb the steps to the diving board 4.0 m above the water. They jump off the board, which enables them to rise a further 0.7 m before they begin their descent into the pool. At what speed do they enter the

asked by AMT on January 8, 2013
5. ## physics

A hydraulic brake system is shown. The area of the piston in the master cylinder is 6.32 cm^2, and the area of the piston in the brake cylinder is 1.83 cm^2. The coeﬃcient of kinetic friction between the brake shoe and the wheel drum is 0.443. How large

asked by michelle on November 30, 2012
6. ## college physics

A hydraulic brake system is shown. The area of the piston in the master cylinder is 6.32 cm^2, and the area of the piston in the brake cylinder is 1.83 cm^2. The coeﬃcient of kinetic friction between the brake shoe and the wheel drum is 0.443. How large

asked by michelle on November 29, 2012
7. ## physics

A shot-putter moves his arm and the 7.0 kg shot through a distance of 1 meters iving the shot a velocity of 10 m/s from rest. Find the average force exerted on the shot during this time how do you solve this problem. Is this question related to Kinetic

asked by Omari on March 31, 2010
8. ## Math/Physics

A 500kV power line has a maximum permissible Voltage drop of 3% and is design to carry 1000 Amps. If the conductor has a 0.026 ohms/km resistance, what is the maximum distance the conductor can be run (to the nearest complete km)? Hint: P=IE, E=IR How do I

asked by anonymous on August 15, 2013
9. ## physics ap

we'l find the time, t, for the ball to fall from the tabletop to the floor. use the equation Δy=viΔt+at^2/2. Take the vi to be zero and a to be 9.81 ±.02 m/s^2. you must first solve this equation for t. Δy=.922m what am i suppose to do with the

asked by Anthony on February 4, 2017
10. ## Math, Geometery

Hey Guys I have a problem like on the kids on here. What is the area of a regular pentagon with a side length of 10 inches and a distance from the center to a vertex of 10 inches? Round by nearest tenth. I know you have to use pythagrean therom to solve

asked by Ashley on June 13, 2012
11. ## math

i got help with this problem a couple days ago. the answer and explanation given made sense to me but on my list of answers it said the the answer is suppose to be: r=[-pih+sqrt(pi^2h^2+2piA)]/2pi if anyone can figure out how to get that thanks so much.

asked by alk on August 11, 2008
12. ## Physics

A baseball catcher moves his glove away from a 40.5 m/s fastball as he catches it. If the average force he exerts on the ball is 1.01 103 N, how far does the glove move? Assume constant deceleration of the ball, which has a mass of 0.144 kg. I don't know

asked by Mohammad on December 13, 2015
13. ## math

the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the following is the correct way to set up the problem to

asked by krysta on March 1, 2012
14. ## Chemistry

a 6.0 mole sample of Ca3(PO4)2 and a 12.0 mole sample of SiO2 react in an evacuated vessel. after one of the reactants is fully consumed, how much of the gas is created? How exactly would you solve this problem? Would you have to find the molar mass of

asked by Allison on November 18, 2015
15. ## Statistics

The mean of a distribution of 1000 individuals' blood pressure is 85. If this number were translated into a Z score it would be equal to +1 standard deviations. True or False? I know to calculate a Z score the formula is Z= (X-sub-i minus the mean)/

asked by Jeff on February 11, 2014
16. ## math

John is three times as old as his son, Michael, and in x year time he will be twice as old as him (i) write down expressions for Johns and Michaels age in x years time (ii) write down and solve an equation in x I know the answers as they are in the back of

asked by jess on July 25, 2008
17. ## chemistry

Okay so i have this titration question and I don't really know the steps because everyone explains it differently. IF someone could explain me the steps of how i could solve this questions and other like this. Thanks In three runs of titration 22.8mL,

asked by Sherry on September 11, 2016
18. ## 6th Math

Don decided to do some landscaping in his backyard. He began by watering the lawn. The rotating sprinkler that he installed can spray an area with a radius of 7 feet. What is the maximum area the sprinkler can cover? a. 21.98 ft(2) b. 28.26 ft(2) c. 43.96

asked by Ty on March 1, 2012
19. ## Number stories

Aswan,Egypt is the driest inhabited place in the world.The average annual rain fall is 0.02 inch.Is this more or less than 1/4 inch per year? How do you solve this problem? This is a triple post. You need post only once. Posting more than once gets us

asked by confuesed on November 6, 2006
20. ## math

A car radiator has a 6-liter capacity. If the liquid in the radiators 40% antifreeze, how much liquid must be replaced with pure anitfreeze to bring the mixture up to a 50% solutions? If I told you the answer is 1 liter, in your own words, using complete

asked by shannon on November 17, 2010
21. ## Chemistry

I can't figure out how to solve this problem: The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required to prepare a 250. mL acidic buffer with pH = 2.75. The initial molarity of hydroflouric acid is .250M but

asked by Jake on April 7, 2011
22. ## careers in early childhood education

Examples of best practices of caregivers, culled from different childcare experiences, include all of the following Except: a.)exude an energetic affection for the children. b.)tell parents judgmental stories about their children. c.)problem-solve with

asked by lachelle mitchell on August 1, 2011
23. ## simple harmonic motion

Quick question: I need to find the acceleration, velocity and displacement at the mid point of SMH. So I know these are the equations: x(t) = Asin(ωt + φ) vx(t) = Aω cos(ωt + φ) ax(t) = −Aω2 sin(ωt + φ) I assume that the displacement is greatest

asked by Anon on October 27, 2017
24. ## college physics

im looking for steps in how to solve this type of problem also what else can the teacher add to make it difficult, like a spring instead of rope, or the block breaking off and how would you go about solving it thank you Two blocks are fastened to the

asked by amy on May 19, 2009
25. ## physics

When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its final temperature (C)? Drwls answered: delta S = entropy change = 1.6*10^5*[1/293 - 1/T2] = 470 Solve for T2 But after I checked

asked by Justin on July 26, 2013
26. ## Chemistry

What is Delta H degrees for the gas-phase reaction below? CH4+ CL3 = CH3CL+ HCL Bond dissociation energies of CL-CL, C-CL, H-CL, and H-C are 243, 339, 431, and 414kj/mol respectively a)113kJ b)-113kJ c)263kJ d)-263kJ Can somebody teach me how to solve

asked by Christian on July 23, 2010
27. ## Maths

f=p(c-1)-c(p-1) sOLVE FOR p f=pc-p-cp+c pc - cp = 0 So now we have f = -p+c Move "p" by itself. f-c = -p Now we multiply each side by -1 p = c-f Let's plug in values for f and c to check. We'll say: f=2 c=3 p=3-2 p=1 in this case. Now, let's plug in the

asked by Rachel on March 20, 2007
28. ## VBA Microsoft Excel

I have been on this problem for about 3 hours and I cannot solve it. My professor wanted us to make a command button with 3 input boxes ( I was able to do this part), but I'm suppose to design a boolean and select case that makes sure that a 5 digit number

asked by Angel on October 9, 2011
29. ## physics

A spring 25cm long is stretched to 30cm by a load of 100N what will be it's length when stretched by a load of 200N provided the elastic limit is not exceeded. Pls I need d solutions and steps to solve this problem now it is my assignment to be submitted

asked by Divine on April 25, 2018
30. ## Writing Sentences and parahgraphs

You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must describe one

asked by Crystal on February 18, 2009
31. ## social studies

please i want to know bertrand russels view on reality This quote, from the first link below, gives a brief look at Russell's view of reality. "According to Russell, reality is a complex of entities which exist objectively and independently of any act of

asked by nathaniel c on November 21, 2006
32. ## algebra,math,help

can someone explain to me the following:thanks... one number is 2 times another. If the sum of their reciprocals is (1)/(4). Find the two numbers. We can begin by looking at the following. Let's use the letters "a" and "c.": "One number is 2 times

asked by jasort20 on March 14, 2007
33. ## physics

A 15.0 kg mass and a 10.0 kg mass are suspended by a pulley that has a radius of 10.0 cm and a mass of 3.0 kg. The cord has negligible mass and causes the pulley to rotate without slipping. The puller is frictionless and may be treated as a uniform solid

asked by Samantha on June 2, 2011
34. ## physics

In the figure, a 4.3 kg block is accelerated from rest by a compressed spring of spring constant 660 N/m. The block leaves the spring at the spring's relaxed length and then travels over a horizontal floor with a coefficient of kinetic friction μk =

asked by brian on November 15, 2014
35. ## Chemistry

A precipitate will be formed when an aqueous carbonic acid soution is added to what other aqueous solution? A. ammonium chloride B. calcium hydroxide C. Sodium Chloride D. Potassium carbonate E. Nitrous acid

asked by Ellie on June 19, 2010
36. ## Chem9

An aqueous solution containing 35.1 grams of an unknown molecular (noneolectrolyte) compound in 152.5 grams of water was found to have a freezing point of -1.8 degrees C. Calculate the molar mass of the unknown compound.

asked by Ryan on May 2, 2011
37. ## Chem

Calculate the pH at which free phenobarbital(an acid) will precipitate from a solution contain 0.0394M(Cs) sodium phenobarbital. Given: molar mass of phenobarbital=232 g/mol; Ka=3.9x10^-8; and water soluble of free phenobarbital(Co)=1g in 1000ml. Thank you

asked by 123 on December 13, 2017
38. ## CHEM

Calculate the hydrogen ion concentration of a 2.30×10^-1 M solution of the strong base RbOH. Round your answer to 3 significant digits. would the answer just be 2.30E-1 because the hydrogen ion will dissociate completely?? help appreciated thanks

asked by ray on April 14, 2009
39. ## Chemistry

In order for a cell potential to be a standard cell potential, the concentration of all ions in solution must be ________ M, the partial pressures of all gaseous species must be _______ atm, and the temperature must be ________ K. I need help with the

asked by Ashley on December 4, 2012
40. ## Calculus

find the intervals on which f(x) is increasing and decreasing along with the local extrema. f(x)=x^4 + 18x^2 I took the derivative and got: f'(x)= 4x^3 + 36x When I set this to zero, I get the imaginary number 3i. I can't get test values for an imaginary

asked by Leah on November 3, 2014
41. ## chemistry

A lab technician tests a 0.100 mol/L solution of propanoic acid and finds that its hydrogen ion concentration is 1.16 x 10^-3 mol/L. Calculate the percent ionization of propanoic acid in water

asked by Geroge B. on April 5, 2008
42. ## Chem

When 20.0mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate, a precipitate Ca (IO3)2 is formed. Calculate the concentrations of both NO3- and IO3- before mixing and after mixing.

asked by Justin on July 5, 2017
43. ## Chemistry

I have 25 million gallons of water at a pH of 6.5. I add 17.4 million gallons of 12.5% by wt sodium hypochlorite (NaClO) at a pH of 12.5 to this water. What will my pH of my final solution be? It's been about 5 years since I took chemistry and I just don't

asked by Kelsey on June 13, 2016
44. ## Chemistry

calculate the change in ph for 1l of buffer solution containing NH4OH and NH4Cl upon addition of 1) 0.02 moles of HCl 2) 0.02 moles of NaOH I got the initial pH as 9.2504 But now Im stuck cus I dunno what happens when we add HCl and NaOH? Please help! :)

asked by Isura on February 22, 2017
45. ## Chemistry

A chemist prepared a solution by dissolving 52.0 g of hydrated sodium carbonate in water to a total volume of 5.00 dm3. The concentration was determined to be 0.0366 M. Determine the formula of the hydrated sodium carbonate.

asked by Billy on November 18, 2015
46. ## Science

Stacy has .55kg water sample at 1 atm pressure and 40 degrees celsius. She heats it to 90 degrees Celsius, maintaining constant pressure. How much heat was absorbed by the solution during the course of this operation? (CP of H2O (l) = 4.18 J/g )

asked by Marketa on December 5, 2012
47. ## Chemistry

In order for a cell potential to be a standard cell potential, the concentration of all ions in solution must be ________ M, the partial pressures of all gaseous species must be _______ atm, and the temperature must be ________ K. I need help with the

asked by Ashley on December 4, 2012
48. ## Chemistry

A solution is made by mixing NaOH and HNO3. Write a balanced equation for the reaction that occurs between the solutes. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

asked by Wende on July 15, 2010
49. ## chemistry

A sample of a copper chloride of mass 1.425g is treated with a water solution of silver nitrate, and the AgCl formed had a mass of 3.038g. What is the correct empirical formula of the copper chloride?

asked by melissa on September 16, 2015
50. ## math Steve form your help

50gm of a mixture of ca(OH)2 is dissolved in 50ml of 0.5N hcl solution, the excess of hcl was titrated with 0.3N -naoh. The volume of naoh used was 20cc. Calculate % purity of ca(OH)2 The answer 41.35% Who helps me step by step

asked by Fai on December 29, 2013
51. ## geometry

a recreation has the following dimensions. 15ft,33ft, 12ft, and 12ft. Carpeting will cost \$ 1.50 per square foot. How many square feet of carpet will be needed and how much will it cost. Include correct units in each solution.

asked by angela on May 19, 2012
52. ## chem

sodium chloride (relative molecular mass = 58.5) had a solubility of 36.0 g per 100g of water. the density of the solution is 1.13 g/ml. which of the following calculations would give te solubility in moles per liter? A) 36.0 x 10/58.5 b) 36.0 x 10 x

asked by Ollie on April 7, 2014
53. ## Chemistry

The following voltaic cell registers an E cell = 0.100V. Pt|H2(g 1 atm)|H^+(x M)||H^+(1.0 M)|H2(g 1 atm) What is the pH of the unknown solution? I am completely baffled as I was not aware until I read this question that pH could be found from voltaic

asked by Alanna on April 3, 2012
54. ## chemistry

can u help me in this question. The rate of appearance of I2 in aqueous solution, in the reaction of I^- ion with hydrogen peroxide, was found to be 3.7*10^-5 mol. L^-1.s^-1 over time interval. 2H^+(aq)+ 2I^-(aq)+H2O2-> I2(aq)+2H2O(l) During the same

asked by Nifan on November 27, 2009
55. ## math

begin with an 8 1/2 x 11 piece of paper. fold it 9accordion style to represent eighths and shad 5 of the 8 equal parts. Then fold and shade the paper to represent 1/3 of the 5/8. What is the multiplication problem being modeled? What is the solution?

asked by stephanie on October 23, 2007
56. ## chem

I got part 1: What is the pH of the solution created by combining 1.10 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? pH w/HCl =1.12 w/HC2H3O2(aq)= 3.94 But how do you do part two? What are the pH

asked by Adam on April 29, 2010
57. ## math

When the rate of interest in the bank is increased from 5% to 6% per annum,Gerald deposits Tsh 12,000 more into his account.If annum interest now received by him is Tsh 1100 more than that before,find his original deposit.**please anyone to help me with

asked by kelvin on November 8, 2016
58. ## Chemistry

If 25.00 mL of 6.00 M HCl is transferred by pipet into a volumetric flask and diluted to 5.00 L, what is the molarity of the diluted HCl? a) 0.75 M b) 0.055 M c) 1.20 x 103 M d) 48.0 M e) 0.0300 M grams of solute/molar mass of solute/liters of solution?

asked by Rebecca on November 20, 2014
59. ## bio chem

Explain how to prepare 1L of a buffer at pH 7.4 using 1M hypochlorous acid (Ka = 3.5 x 10-8) and a 1 M NaOH solution. Indicate the volume of hypochlorous acid and sodium hydroxide to use. pH = pKa + log ([A-]/[HA]) Ka= [H+][A-]/[HA] Molarity = moles/L

asked by Anonymous on March 12, 2013
60. ## Crimes

what solutions are there for the reducing the amount of crime which is committed due to revenge or protections. for example, crime can be committed because of money. so he solution would be to enhance job seeking skills so that they can earn more money by

asked by Anonymous on January 21, 2014
61. ## Chemistry 20

Determine the amount concentration of potassium ions and dichromate ions in a solution made by dissolving 44.7 g of potassium dichromate to make a volume of 205 mL. Include the balanced chemical equation.

asked by Anonymous on November 15, 2010
62. ## Chemistry

When 20.0mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate, a precipitate Ca (IO3)2 is formed. Calculate the concentrations of both NO3- and IO3- before mixing and after mixing

asked by Justin on July 5, 2017
63. ## chem II

0.959 g of a hydrocarbon is dissolved in 10.00g of benzene. The freezing point of the solution is 1.16C. Find the molecular mass of the hydrocarbon. Benzene has a Kf of 5.12 and a freezing points of 5.53 degrees C. Not sure how to go about solving this

asked by Steph on February 8, 2015
64. ## chemistry

prepare a phosphate buffer with pH= 7 from solid NaH2PO4 (pKa =7.21) and Na2HPO4. 1) calculate the ratio of [CB]/[acid] I got the ratio as 0.62 2) calculate the mass of each component required to make 1L of a .1 M buffer solution 3) if the pH is 7.10, how

asked by prepare a phosphate buffer with pH= 7 on October 19, 2015
65. ## economics

i want to make my assignment in witch i have to analyze a problem related to any product like sugar (economy wise) and give its solution and also write its substitutes and compliments .please give an example of economic problem of sugar

asked by Nasir on October 9, 2010
66. ## Chemistry

A 7.85 g sample of a compound with the empirical formula C5H4 is dissolved in 301 g of benzene. The freezing point of the solution is 1.05C below that of pure benzene. what are the molar mass and molecular formula of this compound?

asked by niki on October 1, 2013
67. ## Math

1. A rectangular field with an area of 5000m^2 is enclosed by 300m of fencing. Find the dimensions of the field: A. 100m x 50m B. 75m by 75m C. 150m x 150m D. no solution Please explain answer. Thanks!

asked by ND on September 26, 2007
68. ## Chemistry

Use activity coefficients to find the concentration of hydrogen ions in a solution of 65.0 mM butanoic acid and 0.01 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 × 10-5. Take the size of C3H7COO– to be 500 pm. Find [H+], pH, and alpha.

asked by Jessica on March 12, 2013
69. ## Chemistry

A solution is made by mixing 20.0 mL of toluene C6H5CH3d=0867gmL with 140.0 mL of benzene C6H6d=0874gmL. Assuming that the volumes add upon mixing, the molarity (M) and molality (m) of the toluene are... ______ M and ______ m. I need help. :(

asked by ChemistrIEE on August 15, 2008
70. ## AP CHEM

A bar of strontium metal is immersed in a 1.0 M copper(ll) nitrate solution. write the net ionic. I have the molecular formula written out but im not sure how to write the net ionic for this single displacement reaction

asked by Sophie on September 18, 2016
71. ## chem

Determine the volume of 0.240 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is shown below. H2SO4(aq) + 2 KOH(aq)--> K2SO4(aq) + 2 H2O(l) (a) 26 mL of 0.240 M H2SO4 thanks

asked by Abby on March 11, 2011
72. ## chem

which of the following could be used to dissolve a carboxylic acid into the aqueous phase? a)MgSO4 b)1.5 M HCl c)1.0 M NaHCO3 d)2.0 M Na2SO4 e)saturated NaCl I'm leaning towards choice e because you can have an aqueous solution of sodium salt and a

asked by Jason on December 3, 2008
73. ## Chemistry

Are solutions of the following salts acidic, basic, or neutral? For those that are not neutral, write balanced chemical equations for the reactions causing the solution to be acidic or basic. a.C5H5NHCLO4 b.NH4NO2 c.KOCL d.NH4OCL

asked by Anonymous on February 25, 2015
74. ## HIS 204

In many ways after the divisiveness and devastation of the Civil War, the United States searched for order economically, politically, geographically, socially and racially. Select one of these areas, or suggest another, and make a case for the reasons why

asked by Bethe on November 8, 2011
75. ## History

Compare and contrast the ideas and policies, domestic and foreign, of Roosevelt, Taft and Wilson. Where can I find information that compares their domestic policies? -My Answer so far: Roosevelt, Taft, and Wilson were all progressive reformers, but their

asked by TayB on March 3, 2015
76. ## Physics

There is current of 115 pA when a certain potential is applied across a certain resistor. When that same potential is applied across a resistor made of the identical material but 30 times longer, the current is 0.044 pA. Compare the effective diameters of

asked by Alyssa on February 18, 2016
77. ## calculus

the demand for a certain type of auto tire is given by x=f(p) 50(1+e^-p/60). a)if the weekly quantity demanded is 60000 tires find the price? b)if the current price is \$120 per tire and is increasing at a rate of \$2 per week, what is the rate of change of

asked by anonymous on April 20, 2013
78. ## Physical Chemistry

The Li2+ ion is hydrogenic and has a Lyman series at 740747 cm-1, 877924 cm-1, 925933 cm-1,and beyond. Show that the energy levels are of the form –hcR/n^2 and find the value of R for this ion. Go on and predict the wavenumbers of the two longest

asked by John on June 27, 2018
79. ## Chemistry

The Li2+ ion is hydrogenic and has a Lyman series at 740747 cm-1, 877924 cm-1, 925933 cm-1,and beyond. Show that the energy levels are of the form –hcR/n^2 and find the value of R for this ion. Go on and predict the wavenumbers of the two longest

asked by Joesph on March 9, 2016
80. ## Advanced Functions - Grade 12

The maximum time, T, in minutes, a scuba diver can rise without stopping for decompression on the way to the surface is modeled by the equation T (d) = 525/d-10 , d > 10, where d is the depth of the dive in metres. a) sketch a graph of this relationship.

asked by Nish on July 20, 2010
81. ## Cosmology

The most cosmological measurements show that the universe is extremely flat (Ωk≈0) and that the surface brightness of objects scales with the fourth power of redshift (SB∝z^−4). If the universe was still expanding, but had strong negative curvature

asked by qwerty on January 16, 2013
82. ## Chemistry

The density of diamond is 3.51g/cm^3,and the density of platinum is 21.43g/cm^3.If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders,which graduated cylinder would have the greatest volume

asked by Alasow on September 4, 2016
83. ## Algebra

Use the coordinates of the two points that show male life expectancies for 1980 and 2000 to write a linear function that models life expectancy. E (x), for men born in this community x years after 1960 Coordinates are 1960-66.8 1970-67.5 1980-69.9

asked by Anonymous on February 23, 2017
84. ## physics

A 4.9 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just reach a target 29 m above the marble's position on the compressed spring. (a) What is the change in the gravitational potential

asked by Jake on February 26, 2010
85. ## ece

can someone help me with this please!!! only serious peoples need to apply with no nonsense negative people. 1. two important factors to consider when making a music selection are variety and a.quantity b.quality c.mood d.rhythm 2.the best means of helping

asked by denise on January 9, 2012
86. ## Managerial Economics

I've been trying to find a solution to this without much success. I am given the following....The production engineers at Impact Industries have derived the expansion path shown in the following figure. The price of labor is \$100 per unit. There is a graph

asked by Ed on July 15, 2007
87. ## calculus

a) Let f(z) = z^2 and γ(t) = 1 + it^3, t ∈ [0,1]. i) Write out the contour integral ∫γ f(z)dz as an integral with respect to t. You do not need to evaluate this integral. ii) Evaluate the integral ∫0,1+i z^2dz iii) What is the relationship between

asked by jack on March 5, 2016
88. ## math

I need to know how to calculate what percentage of a number is to another. let me make that clearer, 35 is what percent of 48? how is that calculated? What you are asking is this: 35 is to 45 as x is to 100 or 35/48=x/100 solve for x x=.729 Now to get %

asked by jerry on August 21, 2005
89. ## Chemistry

When a (1.797x10^0) g sample of CuSO4 * 5H2O (Copper II Sulfate Pentahydrate) and NaCl was heated, a total sample of (2.74x10^-1) g of water was lost. What is the mass percent of hydrate in this sample? Give your answer in scientific notation with three

asked by Emma on May 31, 2018
90. ## chemistry

For the reaction, A = B + C, the rate law is kA]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant? a. 0.00450 s-1 b. 0.0290 s 1 c. 0.00530 s-1 d. 0.0150 s-1 e. 5.40 s-1

asked by elvis on February 18, 2012
91. ## AP Chemistry

When a sample of methyl salicylate weighing 5.287 grams is burned in excess oxygen, 12.24 grams of CO2 and 2.522 grams of H2O are formed. What is the empirical formula for oil of wintergreen? I know the answer is C8H8O3, I just need help finding out how to

asked by R on September 16, 2008
92. ## history

what are republicans view on social security. please helppp This is what i have so far:Workers will have choice to invest their payroll taxes. Anyone currently receiving Social Security, or close to it, will not be impacted by any changes.Today’s workers

asked by melissa on November 22, 2009
93. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

asked by DMITRIC on March 9, 2011
94. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

asked by JACKSON on March 8, 2011
95. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

asked by DMITRIC on March 8, 2011
96. ## log 101

An 80% learning curve has been observed for the production of the MEERKAT system. If the 5th production unit''s recurring cost is \$1 million, what will be the recurring cost for the 10th production unit? Assume that the production line is continuous and

asked by Anonymous on August 15, 2014
97. ## science

3 moles of pesticide of molecular mass 200 g/mole is applied to a closed system consisting of 20 m3 of water, 10 m3 of air, 1 m3 of sediment, and 0.001 m3 of fish. Determine the concentration and amount in both grams and mole units in air, water, sediment

asked by gift on March 27, 2014
98. ## MATH

WHAT IS THE BELOW PROGRAM ACQUISTION COST OF THE SYSTEM?( COST TYPES COST (IN MILLIONS OF DOLLARS) RESEARCH, DEVELOPMENT 400 MILLION PROCUREMENT EQUIPMENT 800 PROCUREMENT SUPPORT 100 PROCUREMENT PARTS 100 OPERATIONS & SUPPORT \$70,000 disposal \$100 my

asked by SHAWN on February 15, 2013
99. ## AP Chemistry

The identity of an unknown solid is to be determined. The compound is one of the seven salts in the following table. Al(NO3)3•9H2O BaCl2•2H2O CaCO3 CuSO4•5H2O NaCl BaSO4 Ni(NO3)2•6H2O Use the results of the following observations or laboratory

asked by some kid on January 5, 2009
100. ## History

Which most accurately describes how the Tang dynasty’s concepts of government influenced Asian civilizations? india valued the tang dynastys social class organization and instituted a rigid caste system vietnam respected the tang dynastys representative

asked by malia on October 8, 2017