1. math

    The figure shows 2 similar squares, A and B which overlap each other. The ratio of the shaded area to the total area of square B is 3:5. The ratio of the shaded area to the total area of square A is 9:17. What is the ratio of the shaded area to the total
  2. Economics

    Assume the demand for beef is given by Qd = 22 + 0.1 Y – 10Pb + 5 Pc And the supply of beef is given by: Qs = -400 + 500Pb – 200 Pf where Qd denotes quantity of beef demanded, Qs denotes quantity supplied, Pb denotes price, of beef, Y denotes per
  3. Economics

    What is the computing? in terms of math Industry structure is often measured by computing the Four-Firm Concentration Ratio. Suppose you have an industry with 20 firms and the CR is 20%. How would you describe this industry? Suppose the demand for the
  4. Math

    5).Hat size are determined by the measuring the circumference of the head in either inches or centimeters. Use ratio and proportion to complete the following table. Hat size Head circumference Head Circumference 7 ½ to nearest 1/5 inch to the nearest
  5. Math

    this question does not make sense to me. Add the proper constant to the binomial so that the resulting trinomial is a perfect square trinomial. then factor the trinomail. X^2+21x+__ What is the constant term? What is the factored for of the trinomial? i
  6. Chemistry, Buffers, pH

    Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final
  7. Biology Lab

    Can you please show me how to answer this question using C1V1=C2V2 A scientist receives a vial containing a protein at at concentration of 35mg/ml and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the
  8. Biochem

    If the calibration curve for a Beer's Law plot of a protein assay had a slope of 0.433 when absorb acne, A, was plotted as a function of protein concentration, c, in mg/mL. The absorbance of an unknown protein sample was 0.345. What is the concentration of
  9. Chem

    If the calibration curve for a Beer's Law plot of a protein assay had a slope of 0.433 when absorb acne, A, was plotted as a function of protein concentration, c, in mg/mL. The absorbance of an unknown protein sample was 0.345. What is the concentration of
  10. Math,Ratio

    the ratio of the number of marbles Zali had to the number of marbles Muthu had was 3:4.Muthu gave half of his marbles to Zali.what was the new ratio of the number of marbles Zali had to munber of marbles Muthu had? pls give your answer clearly
  11. math

    The ratio of w to x is 4:3, of y to z is 3:2, and of z to x is 1:6. What is the ratio of w to y?
  12. Math

    The ratio of w to x is 4:3, of y to z is 3:2 and of z to x is 1:6. What is the ratio of w to y?
  13. math

    if the ratio of p to q is 2 to 3, what is is the ratio of 2p to 2q
  14. Ratio

    The Ratio of the hieght of plant X to plant Y is 5:3. If plant Y were 140 c.m. taller instead, the ratio of the hieght of plant X to plant Y would be 1:2. How tall is plant X
  15. Physics - Charge on sphere (check + help)

    Two 2.0g spheres are attached to each end of a silk thread 1.20m long. The spheres are given identical charges and the midpoint of the thread is then suspended from a point on the ceiling. The spheres come to rest in equilibrium, with their centers 15cm
  16. programming language

    can enyone help me figure this out... Surface to Volume Ratio Write a program to compute surface to volume ratio. We will be given the height, width, and depth of N cuboid, and determine the smallest surface to volume ratio among them. Input The first line
  17. !math (4)

    The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 +
  18. *math (4)

    The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 +
  19. !math (4)

    The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 +
  20. economics

    Suppose that the government decides to charge cola consumers an excise tax. Before the tax, the market is in equilibrium, where 12 million cases of cola are sold every month at a price of $3.50 per case. After the tax, 6 million cases of cola are sold
  21. science

    he Bowen ratio describes how available heat at the Earth's surface is partitioned between latent heating (changes in phase of water) and sensible heating (conduction and convection). An increase in the Bowen ratio of agricultural land is the consequence of
  22. Grammar

    Can someone please check if my answers are correct? Identify the verb form that correctly completes each sentence: 1.Earlier, when Matt came in, he ______ the new batteries on the table in the hall. A.sit B.sat C.had sit D.had set Not sure about this
  23. Chemistry

    An analytical chemist determines that an estuarine water sample contains 1.5 g/L of sulfate ion. What is the 
concentration in terms of (a) g/L of S (b) molar concentration of sulfate (c) normality (d) parts per million of sulfate


  24. Physics

    Alex comes across a deep ravine. She was planning on this as she packed a 3.8 m portable telescoping extension ladder. It has a mass of 15 kg. She was told that in order to get to the skull’s last known location, she must get across this 2 m gap. -------
  25. Maths

    There were a some men, women , children in a hall.there 1 1/4 times as many men as women,and the ratio of number of women to the number of children is 8:5.when 105 more children entered the hall, the ratio of men to the children changes to 3:2. find the
  26. CHEMISTRY

    If 142.38 g of l water at 21.7 degrees C is placed into a syrofoam cup with 174.36 g of ice at -27.5 degrees C what would be the final temperature of the entire contents at equilibrium? If it is partially frozen, how many g of the ice has melted? given
  27. Biology

    Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion
  28. Biology

    Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion
  29. Biology

    Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion
  30. MATH EMERGENCY

    The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 +
  31. Chemistry

    Consider the reaction: CO(g) + H2O (g) <---> CO2(g)+H2(g) which of the following initial composition will NOT achieve equlibrium? a) 0.25 mol H2, 0.35 mol CO2, and 0.25 mol CO b) 0.25 mol CO, 0.75 mol H2O c) 1.0 mol of CO2 and 0.50 mol H2 d) 0.85 mol
  32. chemistry

    One of the steps in the Ostwald process for the production of nitric acid involves oxidation of ammonia. 4NH3 (aq) + 5O2 (g) <---> 4NO (g) + 6H2O (g), Delta H= -905kJ a) State the reaction conditions that favour the production of nitrogen monoxide.
  33. Math

    Considering the word Mathematics, what is the ratio of vowels to consonants? Write the ratio 3 ways. word form: colon form: fraction form:
  34. yes

    Area of 4 walls of a room is 108 sq meter. If height and length of room is in ratio 2:5 and height and breadth is in the ratio 4:5. Find the are of the floor of the room
  35. Math

    Considering the word Mathematics, what is the ratio of vowels to consonants? Write this ratio 3 ways: Word form: Fraction form: Colon form:
  36. Maths

    A rectangular photo measures 18cm by 7cm. The lengths are enlarged in the ratio 2:3. What is the ratio of the original photo to the area of the enlarged photo?
  37. Chemistry

    Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by
  38. chemistry

    What is the concentration of NaOH? using this solution (0.04756 M (i think its stand for Molarity) H2SO4) what is the concentration of NaOH in 10.00 ml of a solution, titrate to an end point using 24.22 ml of acid? formula that was given is (H2SO4 + 2NaOH
  39. chemistry

    If the temperatures of separate 34 g samples of gold, mercury, and carbon are to be raised by 10.0°C. How much heat must be applied to each substance?
  40. math

    for $50,000 fundraising campaign, 98% of the funds have been raised. Which of the three forms would you choose to mentally calculate this amount?
  41. chemistry

    What mass of liquid water a t room temperature (25°C) can be raised to its boiling point with the addition of 40.0 kJ of energy?
  42. maths-binomial theorem--plse help

    find the greatest term in the expansion of (1+x) raised to thepower of10, x=2/3
  43. Algebra tricky ques

    if w is one of the complex cube roots of unity, show that 1+w equals 1. w is raised to power 2
  44. physic

    A 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. How many kilowatts of power is needed for the job?
  45. 6th grade social studies

    What are the crops/livestock raised, and the resources mined in the Ande Mountains.
  46. chemistry

    I was asked to prepare a 1.0 x 10-3M Iodine solution in Methylene Chloride. How do I go by this calculation? (Note: ............10 raised to the power of -3)
  47. Politics

    If an individual decides to drop out from running for office (Senate), what happens to the money that was donated and raised for the campaigning? Where does it go?
  48. Math

    Compute the following -7/2 x 9^-3/2 + 3/2 x 9^-5/2 + 14 7/2 is a negative fraction. the entire fractions are multiplied by 9 raised to their respective exponents. I can't figure this out. Please help?
  49. Phsychology

    A child who is easy to get along with, independent and self-reliant likely was raised by a person(s) who practiced the _________________ style of parenting.
  50. physic

    . A 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. How many kilowatts of power is needed for the job?
  51. science

    What is the gravitational potential energy of a 2kg ball on planet earth raised 15 meters in the air?
  52. Physics

    A 1.20kg ball is rolled down a frictionless ramp whose top is 0.80m above a horizontal spring with ks = 800N/m. The ball reaches the horizontal just in front of the spring. a.) What is the kinetic energy of the ball just before it contacts the spring? b.)
  53. chemistry

    a 30.0 ml solution of potassium nitrate was diluted to 125 ml and 25 ml of this solution were then diluted to 150 ml. the concentration of the final solution is 0.00307 M. Calculate the concentration of the original solution.
  54. electric chem

    A voltaic cell is made by placing an iron electrode in a compartment in which the Fe2+ concentration is 2.0 ´ 10-5 M and by placing a Pt electrode in the other compartment, in which the H+ concentration is 3.4 M and = 1.00 atm.
  55. grammar

    So I am writing my paper and I am confused I know you use fewer when you have something countable like items. and less when its not a countable things. For my example would I say that 5% concentration of coffee had less of an effect of fewer effects than a
  56. Chemistry

    When the concentration of a weak acid in solution is equal to the concentration of its conjugate base in solution, then: Would pH=pKa or would it equal pH=pKa + 1 like Henderson-Hasselbalch equation?
  57. College Geology Homework

    Suppose you have a sample of potassium feldspar from a rhyolite and you measure the ratio of atoms of 40Ar to 40K of 0.024 to 1, or for every 10000 atoms of 40K you find 240 atoms of 40Ar. For this problem, consider the decline of 40K from an initial value
  58. Chemistry (concentration)

    H2SO4(aq) + 2LiOH(aq) → Li2SO4(aq) + 2H2O(l) 3.2 moles of LiOH enter the reaction and are fully consumed. The molar mass of Li2SO4 is 110 g/mol. The final aqueous solution has a volume of 4.0 L. What is the final concentration of Li2SO4 in g/L? 44
  59. Physics

    A ceiling fan has two different angular speed settings: 1 = 475 rev/min and 2 = 170 rev/min. What is the ratio a1/a2 of the centripetal accelerations of a given point on a fan blade? Centripetal acceleration at a distance R and angular speed w is a = R
  60. biology

    what does it mean to say that the ratio of oxygen to carbon in fat is smaller than that in carbohydrate? i know that the formula for glucose is c6h12o6. so when they say that the ratio of oxygen to carbon in fat is smaller, what exactly is it like? So the
  61. Advanced MicroEconomics

    Construct a short-run supply function for a firm whose short-run cost function is C= = 0.04q^3 – 0.8q^2 +10q+5 3. The long run cost function for each firm is C = q^3 – 4q^2 + 8q. Find the industry’s long run supply curve. If the market demand curve
  62. analytical chemistry

    Any help is greatly appreciated 5mL of a solution A (unknown concentration) was transferred into sic 25mL volumetric flask. The following volumes of a standard solution of A with with a concentration 75ppm were added to the flask: 0mL, 0.5mL, 1mL, 1.5mL,
  63. physics

    A hot iron horseshoe (mass = 0.43 kg), just forged (Fig. 14-16), is dropped into 1.60 L of water in a 0.26 kg iron pot initially at 20°C. If the final equilibrium temperature is 26°C, estimate the initial temperature of the hot horseshoe. Could someone
  64. Spanish

    57. Sé poco de estos platos españoles en el menu. Voy a pedir _____. a. la especialidad de la casa b. el plato principal c. a la carta d. por la carne de res A? C? Not sure.. 58. Ese camarero siempre me sirve _______. a. una vez b. en seguida c. muchas
  65. SPANISH PLEAASSEE HELPP (im stuck)!!!!!!!!!!!!!!!!

    The video characters are having Maite's birthday cake. Complete the conversation with the correct pronouns. DON FRANCISCO: Chicos, voy a hablar con la señora Perales, en un momento estoy con_____. JAVIER: Sí, don Efe, no se preocupe por ______ . INÉS:
  66. Functions/Logarithims

    Energy is needed to transport a substance from outside a living cell to inside the cell. This energy is measured in kilo calories per gram molecule, and is given by E = 1.4 log (C1) / (C2 where C1 represents the concentration of the substance outside the
  67. calculus inverted cone

    A container in the shape of an inverted cone has radius 6 ft and height 12 ft. It is being drained at 2〖ft〗^3/min. Find the rate of change of the height of the liquid in the cone when the height is 3 feet. The ratio of the radius to the
  68. Water Treatment

    Minimum oxygen concentration should be 7.6 mg/l, concentration in raw water is 0 mg/l and you can assume a saturation concentration of 10 mg/l. Calculate the total efficiency of oxygen addition, the number of cascade steps and the total height of the
  69. Bio

    Please Check my work and help me to answer the questions i could not get. Measure the cube that you are given. Complete the chart on the next page for your cube, then fill in the spaces for two other cubes, one measuring 1 cm on an edge and the other
  70. Bio

    Please Check my work and help me to answer the questions i could not get. Measure the cube that you are given. Complete the chart on the next page for your cube, then fill in the spaces for two other cubes, one measuring 1 cm on an edge and the other
  71. Physics

    A crate of potatoes of mass 23.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.78 and μk = 0.35. Find the frictional force (magnitude and direction) on the crate if the crate is at rest. I
  72. PLEASE HELP! PHYSICAL CHEM

    The measured osmotic pressure of seawater is 25 atm at 273K. a.) What is the activity of water in seawater at 273 K? Take the partial molar volume of water in seawater to be 0.018 M-1. b.) The vapor pressure of pure water at 273 K is 4.6 torr. What is the
  73. Physical Chemistry

    The measured osmotic pressure of seawater is 25 atm at 273K. a.) What is the activity of water in seawater at 273 K? Take the partial molar volume of water in seawater to be 0.018 M-1. b.) The vapor pressure of pure water at 273 K is 4.6 torr. What is the
  74. CALCULUS ECONOMICS

    Consider an economy in which a monopolistic firm serves two identical, but separate markets, called A and B. The aggregate inverse demand in each market is given by 1000−q. The cost function for the monopolist is given by (qA+qB)^2, where qA andqB
  75. college Chemistry

    Hydrobromic acid is a strong acid. If you have 1 L of a 7.5 M solution of Hydrbromic acid? A) What is the concentration of H_3O^+? B) What is the PH of this solution? C) If you dilute 1 liter of 7.5M in HBR solution to a volume of 2 L what is the new
  76. science

    A vehicle starts from rest and accelerates with a constant acceleration, covering 200m in 5s. it then continues at a constant velocity for 300m before decelerating with a constant 2m/s^2 deceleration to a stop. what is the maximum speed attained, total
  77. Advanced Functions - Grade 12

    The function C (t) = 0.16t/t^2 + t + 2 models the concentration, C, in milligrams per cubic centimetre, of a drug entering the bloodstream over time, t, in minutes. a) Sketch the graph of the relation. b) Explain the shape of the graph in the context of
  78. Economics

    The pricing of pharmaceutical products can be controversial. A recent example is EpiPen produced by Mylan which is used to treat anaphylaxis. The retail price of an EpiPen is $300, while industry sources estimate that it costs around $30 to produce each
  79. Economics

    The pricing of pharmaceutical products can be controversial. A recent example is EpiPen produced by Mylan which is used to treat anaphylaxis. The retail price of an EpiPen is $300, while industry sources estimate that it costs around $30 to produce each
  80. math

    STRING LENGTHS: You have two pieces of string. One is 27 cm long. The other is 45 cm long. You want to cut each piece of string into smaller pieces of equal length. Each length is to be a whole number of centimeters. List all the possible lengths of the
  81. Help Please - Genetics

    Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Terms can be used once, more than once, or not at all. Gene ______ (also called trans-acting regulatory proteins) are proteins that bind to DNA sequences and
  82. chemistry

    assuming the reaction goes to completion, determine the final concentration of NH4Cl in the calorimeter. NH4Cl(s)+ H2O(l)-> NH4Cl(aq) concentration of NH4Cl is 1.00M its specific heat is 3.93 and density is g/ml. note: the exact same question was asked
  83. Chemistry

    In practice the methanol production process is operated at temps of 250-300c and at pressures of 50-100 atmospheres in the presence of a copper based catalyst. Are these operating conditions consistent with the aims of achieving a high equilibrium yield of
  84. science

    i have to do a chi square test based on the genetics of corn. I predicted that the ratio for the results below would be 8:2:2:1 and it works for the chi-square test. but then i have to say what the genotypes would be for each of the parents to match the
  85. science

    i have to do a chi square test based on the genetics of corn. I predicted that the ratio for the results below would be 8:2:2:1 and it works for the chi-square test. but then i have to say what the genotypes would be for each of the parents to match the
  86. Chemistry

    The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 g·mL–1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 555-mm column of di-n-butyl phthalate. The density of mercury is 13.53
  87. college microeconomics

    Suppose that two players are playing the following game. Player 1 can choose either top or bottom, and Player 2 can choose either left of right. The payoffs are given in the following table Player 2 Left Right top 9,4 2,3 Player 1 Bottom 1,0 3,1 where the
  88. Chemistry

    The values of Ksp for silver bromide, AgBr is 7.7x10^-13, and silver chloride, AgCl is 1.6x10^-10. A solution containing a mixture of 2.0x10^-2 M Br^- and 2.0x10^-2 M Cl^- is a candidate for separation using selective precipitation. Solid AgNO3 is added
  89. science

    How would I scale down an experiment? For example a procedure states that 5.0 g will be made (53% yield) but we want to propose a microscale procedure that would synthesize .120 g. Do I simply divide desired amount of product by the one given in the
  90. chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 5.591×10−3 M−1s−1. What is the initial rate of reaction
  91. chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 2.091×10−3 M−1s−1. What is the initial rate of reaction
  92. Science

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 1.091×10−3 M−1s−1. What is the initial rate of reaction
  93. Chemistry

    Lactic acid is a major component of Ringer’s solution, which is used as an intravenous fluid to maintain fluid balance in trauma patients. The pH of a 0.100 M lactic acid solution is around 2.44. Based on this information, determine the value of the acid
  94. chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 2.591×10−3 M−1s−1. What is the initial rate of reaction
  95. Chemistry

    The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 4.091×10−3 M−1s−1. What is the initial rate of reaction
  96. calculus

    a 20 ft ladder is leaning against a wall. The bottom is being pulled out at a constant rate of 2.5 ft/sec. Will the top of the ladder clide sown thr wall at a constant rate? What will the rate be? In relation to time? It is not constant. Use pythagorus:
  97. Math

    Polluted water flows into a pond. The concentration of pollutant in the pond at the t minutes is modelled by the equation c(t)= 9-90,000(1/10000+3t), where c is measured in kilograms per cubic metre. a) When will the concentration of pollutant in the pond
  98. Chemistry

    For the reaction H2(g) + I2(g) <===> 2HI(g), Kc=54.9 at 699K. A system was charged with 2.50 moles of H2 ans 2.50 moles of I2 and 5.00 moles of HI initially in a 5.00 liter vessell. How many moles of H2 should there be present at equilibrium? (Answer
  99. chemistry

    what is the concentration of ions in 1.2 M aluminum nitrate solution Al(NO3)3 I count four ions )(one Al, three nitrate), so the conc of ions will be 4 times the concentration.
  100. chemistry

    In a titration of 0.5 M HCl and an unknown concentration NaOH, 25.0 ml of NaOH was required to completely neutralize 25.0 ml of HCl. What is the concentration of the NaOH?