Questions Asked on
March 26, 2010

  1. gen 105

    what are some ways in which you may make use of web- based information and guard against plagiarism.

    asked by lucy
  2. trig

    verify the identity: tan^2x(1+cot^2x)=1/1-sin^2x Verify the Id: tanx + cotx/ tanx-cotx = (1/sin^2x-cos^2x)

    asked by stacey graham
  3. Pre-Cal(Please help)

    Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / x - 3 + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?

    asked by Hannah
  4. trig

    verify the identity: sec(beta)+ tan (beta)= cos(beta)/ 1-sin(beta)

    asked by stacey graham
  5. trig

    verify the identity: sin(x+y)-sin(x-y)=2cosx siny

    asked by stacey graham
  6. trig

    find the angle (theta) using cofunction identites sin(3theta-17degrees)=cos(theta+43degrees)

    asked by stacey graham
  7. trig

    find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in quad 4, and sin C=(1/4) in quad 2 sin(A-B)?

    asked by stacey graham
  8. trig

    tan(theta)=(7/24), sin(theta)

    asked by stacey graham
  9. chemistry

    how many grams of oxygen are formed when 500gof dinitrogen monoxide decomposes?

    asked by aminat
  10. physics help

    A 1100 kg automobile is at rest at a traffic signal. At the instant the light turns green, the automobile starts to move with a constant acceleration of 3.0 m/s2. At the same instant a 2800 kg truck, traveling at a constant speed of 8.0 m/s, overtakes and

    asked by beav
  11. hsm 270

    Identify where the program planning and evaluation process can provide opportunities for program improvement. Explain the how program evaluation can improve a program. Consider both the manager and funder perspectives as you look for program improvement

    asked by ttnl
  12. math

    sigma 1 to infinity 2/k(ln(3k))^2 coverges or diverges

    asked by Anonymous
  13. Math

    For the graph of (3-x)/(5x+2)^3: is the following information right? x-intercept: (3,0) y-intercept: (0,0.375) vertical asymptote: x= -0.4 horizontal asymptote: y=0 increasing: (4.7, infinity) decreasing: (-infinity, -0.4) (-0.4, 4.7) concave up: (-0.4,

    asked by Tim
  14. physics help!!!

    In February 1955, a paratrooper fell 365 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 60 m/s (terminal speed), that his mass (including gear) was 90

    asked by dave
  15. math

    Two automobile dealers, A and B, had the same car which was listed at $18,000. Dealer A offered a $1200 rebate and would negotiate a further 8% discount after rebate. Dealer B offered an 8% discount and would negotiate a further $1200 rebate. (a) Which

    asked by Kirk
  16. math

    Sheryl correctly answered 85% of the questions on her 200-question biology final. Fernando scored a 90% on his 180-question chemistry final. (a) Who answered more questions correctly? ____________________ (b) Who answered more questions incorrectly?

    asked by Kirk
  17. Chemistry

    A 20.0-mL sample of 0.20M sodium acetate is titrated with 0.11M HCl(aq). What is the pH after the addition of 50.0-mL HCl(aq)? (Kb of CH3CO2 = 5.6x10^-10)

    asked by Sean
  18. CHEMISTRY

    WHAT FACTORS ARE CONSIDERED TO BE STRESSES ON AN EQUILIBRIUM SYSTEM

    asked by ANDREW
  19. Chemistry

    Mercury vapour is used in as the dominant species which is excited in a traditional fluorescent light. The first and second excited states of Mercury occur at 254 and 185 nm. (a) Calculate the energies of each of these transitions.

    asked by Mary
  20. Chemistry

    Mercury vapour is used in as the dominant species which is excited in a traditional fluorescent light. The first and second excited states of Mercury occur at 254 and 185 nm. 1. In what region of the electromagnetic spectrum do these transitions occur? 2.

    asked by Mary
  21. chemistry

    Hi Can sombody please help me with this problem If a soil sample contains 0.5g of iron (Fe3+) per 100g. The iron is precipitated when soil becomes alkaline as shown by equation Fe3+ + 3OH + (x-1)H2O ? FeOOH.xH2O(s) The soil is sprayed with 50 wt% urea

    asked by Mary
  22. Physics

    An odometer in a car has a reading of 50 km at the beginning of a trip and a reading of 125 km half an hour later. What is the average speed of the car? Textbook ans: 150km/h Please can someone help me solve this problem? I don't know how to solve it. Can

    asked by John
  23. government

    In a Federal System of Government, where does the power and authority come from?

    asked by Salome
  24. 6th grade

    Assume that the average speed of a moving object at 1 m was initial velocity and average spped of your cvart 5 m was its final velocity. calculate the change in velocity of your cart from 1 m to 5m. Show your work

    asked by Brittany
  25. Carribean

    I have to think of 4 kinds of cultural experiences that tourists might have in the Carribean, then I have to describe the direct and indirect benefits from each experience. I've already thought of one, and it's the Carnival Parade in Trinidad.

    asked by AL 87
  26. vocab

    I waana English vocablry ( story or Essay )

    asked by Majd
  27. 4th grade English

    Please check the following, thanks. First Syllable Accented Cancel Chamber Gather Tender Damage action Second Syllable Accented Frosty Mustang Convince Belief Behave Certain Remind Confuse Contain

    asked by Claire
  28. Geology

    Can someone give me a good resource from the usgs.gov site on the Flordia Everglades? I need information about the rocks and volcanic activity within the Everglades. I have the answers to the questions, but I do not understand the site and how to find

    asked by Sarah
  29. trig

    verify the identity (tanx+cotx) (1) __________ = ______________ (tanx-cotx) (sin^2x-cos^2x)

    asked by stacey graham
  30. trig

    (1) tan^2x(1+cot^2x)= _____________ (1-sin^2x)

    asked by stacey graham
  31. trig

    find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in quad 4, and sin C=(1/4) in quad 2 tan(B+C)

    asked by stacey graham
  32. trig

    {tan^2x+cotx divided by tanx-cotx} is equal to {1 divided by sin^2x-cos^2x}

    asked by stacey graham
  33. trig

    {tan^2x(1+cot^2x)} is equal to{1 divided by 1-sin^2x}

    asked by stacey graham
  34. trig

    given that cos(theta)= (3/5) and sin (theta)

    asked by stacey graham
  35. trig

    Evaluate cos (2 arcsin (1/4))

    asked by stacey graham
  36. trig

    solve the equation 3 sin^2(theta) -sin(theta)-4=0

    asked by stacey graham
  37. Science

    If the sun is in the center of the constellation Sagittarius on January 10, what time would the sun rise and what time would it set? Need an answer!!!!!

    asked by Jenny
  38. Science

    If the sun is in the center of the constellation Sagittarius on January 10, what time would the sun rise and what time would it set? Need an answer!!!!!

    asked by Jenny
  39. english

    if i have to write a passage using rhetorical devices on a person or an ideology.. what would be the best thing for me to write on and how can i got about it.

    asked by pat
  40. physics: escape velocity

    You are on Pluto and would like to send a probe into space so that it does not fall back to the surface. What minimum launch speed do you need? (The mass of Pluto is 1.3x^22 kg and the radius of Pluto is 1.18x10^6 m). Answer in km/s. I have used the

    asked by Laramie
  41. math

    I need help finding the center and latus rectum of the equation: 3y^2 - 2y + x + 1 = 0

    asked by dcw
  42. Math!

    A credit Union pays 8.25% comppunded annually on 5-year compound-interest GICs. It wants to set the rates on its semiannulaly and monthly compounded GICs of the same maturity so that investors will earnt eh same total interest. What should be the rates on

    asked by Thara!
  43. us history

    during the american revolution, the _______ remained loyal to england.

    asked by sarah
  44. Compound Interest!

    Mr. and Mrs.Eng's property taxes,accounting to $2450, are due on July 1. What amount should the City accept if the taxes are paid 8 months in advance and the City can earn 6% compounded monthly on surplus funds?

    asked by Thara!
  45. Compound Interest!

    Florence can pay her golf membership dues with a single payment of $1500 at the beginning of the year or by paying $770 at the beginning of the year and $810 six months later. What option is to her advantage if she can earn 7% compounded queaterly on

    asked by Thara!
  46. Compound Interest!

    Two payments of $10,000 and $12,000 must be made 1 year and 4 years from now. If money can earn 9% compounded monthly, what single payment 2 years from now would be equivalent to the two scheduled payments?

    asked by Thara!
  47. math

    How do i find the transformed equation of the hyperbola xy = 4 when rotated 45 degrees? I don't understand at all. my choices are: A - (x')²(y')² = 4 B - (x')² - (y')² = 4 C - (x')² - (y')² = 8

    asked by dcw
  48. Pre calculus

    4x^2-25y^2-8x-100y-196=0 how do i find the conic section to find the center?

    asked by bbb
  49. math

    What is the major axis and the domain of the equation 9x^2 + 16y^2 - 36x + 96y + 36 = 0 ?

    asked by dcw
  50. math

    Finding the domain of G(X)=4/4-3X So would the domain be 3 then?

    asked by KiKi
  51. physics help

    particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then

    asked by mike
  52. physics

    A flywheel with an axle 1.0cm in diameter is mounted in frictionless bearings and set in motion by applying a steady tension of 2N to a thin thread wound tightly round the axle. The moment of inertia of the system about its axis of rotation is 5.0 x 10^-4

    asked by Edwin
  53. pre calculus

    x^2+y ^2+ 4x + 6y - 12 = 0 how do i find the domain?

    asked by mmm
  54. bio

    if antibiotics seem effective against a human illness, then this illness is probably caused by

    asked by Anonymous
  55. math/hurry

    Round each of the following numbers as specified. (a) 508.576 to the nearest hundredth ________________ (b) 508.576 to the nearest tenth ________________ (c) 508.576 to the nearest hundred

    asked by Kirk
  56. pre calculus

    9x^2 + 16y^2 - 36x + 96y + 36 = 0 how do i find the domain to this problem?

    asked by ppp
  57. pre calculus

    9x^2 + 16y^2 - 36x + 96y + 36 = 0 How do i find the major axis?

    asked by mike
  58. math

    Wheel’s Bicycle shop advertised a bicycle for 15% off for a savings of $36. The bicycle did not sell so it was offered at a new 20% discount off the sale price. (a) What did the bicycle sell for regularly? ______________ (b) What is the amount of the new

    asked by Kirk
  59. physics

    The static pressure in a horizontal pipeline is 4.3 x 10^4 Pa, the total pressure is 4.7 x 10^4 Pa, and the area of cross-section is 20cm^2. The fluid may be considered to be incompressible and non-viscous and has a density of 10^3 kg/m^3. Calculate (i)

    asked by Edwin
  60. algebra

    (a+b)(a-2b)

    asked by justin
  61. Additional mathematics

    Given that y=2x62+px+16 and that y

    asked by Sean
  62. physics

    A plane progressive wave is represented by the equation: y= 0.1sin(200pi(t)-20pi(x/17) where y is the displacement in millimetres, t is in seconds and x is the distance from a fixed origin O in metres. Find (i) the frequency of the wave, (ii) its

    asked by Edwin
  63. Chemistry

    A 2.00g sample of a gas SX6 has a volume of 329.5 cm3 at 1.00 atm and 20 celcius. What element is X?

    asked by Meg
  64. Physics

    An Atwood machine is constructed using a disk of mass 2 kg and radius 20.1 cm. 2.3 m= distance between weights 1.53 kg= weight 1 1.18 kg=weight 2 What is the acceleration of the system? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s2.

    asked by Caryn
  65. Physics

    A 16 kg mass is attached to a cord that is wrapped around a wheel with a radius of 10.9cm. The acceleration of the mass down the frictionless incline is measured to be 1.4 m/s2.The angle of incline is 36 degrees. Assume the axle of the wheel to be

    asked by Caryn
  66. algebra

    what are extraneous solutions of an equation? Why do they sometimes occur in the process of solving rational equations? examples

    asked by sid
  67. Physics

    A 190 g basketball has a 37.3 cm diameter and may be approximated as a thin spherical shell. Starting from rest, how long will it take a basketball to roll without slipping 2.48 m down an incline that makes an angle of 46◦ with the horizontal? The moment

    asked by Caryn
  68. Physics

    A horizontal 873 N merry-go-round of radius 1.11 m is started from rest by a constant horizontal force of 70.6 N applied tangentially to the merry-go-round. Find the kinetic energy of the merry-go-round after 3.59 s. The acceleration of gravity is 9.8 m/s2

    asked by Caryn
  69. physic

    he current in a 100 watt lightbulb is 0.840 A. The filament inside the bulb is 0.140 mm in diameter. a) What is the current density in the filament? b) What is the electron current in the filament?

    asked by elena
  70. poetry

    sojourner's vision of god is an example of an

    asked by Anonymous
  71. physics

    Two point charges 1.5 cm apart have an electric potential energy -150 mu J. The total charge is 34 nC. what are q_1 and q_2?

    asked by mandy
  72. physics help please!!!

    The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much

    asked by Anonymous
  73. com. 140

    What kind of unwanted reactions might you encounter when trying to convince the business committee to except your proposal for a new service?

    asked by Precious
  74. Pre-Cal

    Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / (x - 3) + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?

    asked by Hannah
  75. physics help

    a 3.5 kg dog stands on a 21 kg flatboat at distance D = 6.1 m from the shore. It walks 2.3 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore. I thought i have the

    asked by mike
  76. physics

    Suppose a 69 kg person stands at the edge of a 7.8 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1600 kg*m^2. The turntable is at rest initially, but when the person begins running at a speed of

    asked by Anonymous
  77. 10th Grade Honors Chemistry

    volume of 8.00 grams of hydrogen gas at 32.0 degrees celcius and 1.50 atm

    asked by Theresa
  78. world history

    How did seamstress dress during Medieval times?

    asked by Danielle
  79. Pre-Cal

    use a graphing calculator to obtain the graph of the function. What do you observe about its asymptotes? g(x) = 4 [x-2] / x + 1 My answer was there are two horizontal asymptotes but it was wrong.

    asked by Hannah
  80. CHM 152

    Consider the following equilibrium: PCl5 = PCl3+ Cl2 5.0 moles of are placed in a 10.0 L flask at 200 C and allowed to come to equilibrium. Analysis shows that 1.0 mole of is present in the equilibrium mixture. How many moles of are present at equilibrium.

    asked by AMI
  81. CHM 152

    For the system 2A (g) + B( g) = 2C (g), if the initial concentration of pure C is 1.00 M, the equilibrium concentration is 0.40 M. What is the value of Kc? Choose one answer. a. 5.0 b. 0.45 c. 0.67 d. 2.2 e. 1.5

    asked by AMI
  82. CHM 152

    Consider the following equilibrium: PCl3 + Cl2 = PCl5 Kc=26 @ 250 degree Celcius 1.0 mol of PCl3 , 1.0 mol of Cl2 , and 5.0 mol of PCl5 are placed in a 10.0L flask at 250 C and allowed to come to equilibrium. What is the concentration, in M, of at

    asked by AMI
  83. Physics

    A Jeweler working with a heated 47g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celsius, what mass of water at 25 degrees Celsius is needed to lower the ring's temperature to 38 degrees

    asked by Demi
  84. physics

    A small source O of electromagnetic waves is placed some distance from a plane metal reflector M. A receiver R, moving between O and M along the line normal to the reflector, detects successive maximum and minimum readings on the meter joined to it. (a)

    asked by Edwin
  85. physics

    Water flows steadily along a uniform flow tube of cross-section 30cm^2. The static pressure is 1.20 x 10^5 Pa and the total pressure is 1.28 x 10^5 Pa. Calculate the flow velocity and the mass of water per second flowing past a section of the tube.

    asked by Edwin
  86. Physics

    I appreciate any help! Thank you!! How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175 degrees Celsius? Assume that their initial temperature is 21 degrees Celsius, that the specific heat

    asked by Demi
  87. physics

    A flywheel of moment of inertia 0.32 kgm^2 is rotated steadily at 120rad/s by a 50 W electric motor. (i)find the kinetic energy and angular momentum of the flywheel. (ii) calculate the value of frictional couple opposing the rotation. (iii)find the time

    asked by Edwin
  88. Physics

    I'm understanding most of this physics, but here is one last question I would appreciate help on. Thank you! Okay, so the question involves a figure. A link to the question and the picture with it is below can be found by googling the question along with

    asked by Demi
  89. Medical Terminology

    A patient visits the doctor's office with abdominal pain of two days' duration. Medical history is significant for tonsillectomy and hypertension. The patient denies alcohol and drug abuse. The rectal examination confirms heme-negative stool. Impression:

    asked by Brenda
  90. Medical Terminology

    Gastrectomy is listed as the principle procedure on the surgical report. You know that (-ectomy) means excision or surgical removal. What part of the medical word does "-ectomy" represent? A. Root B. Suffix C. Prefix D. Combining form

    asked by Brenda
  91. MATH

    Determine all the absolute extreme values for the function f(x, y) = sin x sin y sin(x + y) on the square 0

    asked by GRAVITY
  92. Medical Terminology

    The Histology report showed adenocarcinoma. What type of information appears in this report? A. Tissue structure B. Presence of cancer in an organ C. Condition of a particular organ D. Condition of the heart

    asked by Brenda
  93. chemistry 121

    Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a

    asked by andrea
  94. physical geography

    why doea a rising parcel of unsaturated air cool more rapidly than a rising parcel of saturated air??

    asked by ellie
  95. gr 12 chem

    if some light is absorbed by an electron, what happens to the electron?

    asked by amy
  96. Medical Terminology

    You're asked to change plural medical words to the singular form. Which of the following combinations represents the correct conversion? A. Criterion, criteria B. Bacteria, bacterium C. Lumen, lumina D. Ganglion, ganglia

    asked by Brenda
  97. History

    How important is it for the people of a nation to have approved their constitution?

    asked by christopher
  98. Medical Terminology

    A 15-year old female patient has experienced daily nausea for the past two months. The patient states that she feels like "I've eaten something that has upset my stomach.: She denies vomiting and weight loss. The patient has noticed a weight gain of 10 lb

    asked by Brenda
  99. physics

    If the amplitudes of the two waves are 3 units and 1 unit respectively, show by the principle of superposition that the ratio of the amplitudes of the stationary wave at an antinode and node respectively 2:1

    asked by Edwin
  100. physics

    water flows along a horizontal pipe of cross-sectional area 48cm^2 which has a constriction of cross-sectional area 12cm^2 at one place. If the speed of the water at the constriction is 4 m/s, calculate the speed in the wider section. The pressure in the

    asked by Edwin
  101. physics

    Show that a force acting along a given line can always be replaced by a force of the same magnitude acting along a parallel line, together with a couple.

    asked by Edwin
  102. physical science

    i need to draw an example of a combined pulley

    asked by carrie smith
  103. Medical Terminology

    The lateral ports were removed. Where would these ports be located? A. Toward the back B. Toward the head C. Farthest from the median D. Toward the front

    asked by Brenda
  104. Medical Terminology

    A 65-year-old patient has a murmur over the apex of the heart. What does the term apex represent? A. Tip B. Nearest the middle C. Front D. Back

    asked by Brenda
  105. Medical Terminology

    The patient reports smoking three packs of cigarettes per month. She denies drug and alcohol use. This statement is an example of A. social history B. family history C. physical examination D. chief complaint

    asked by Brenda
  106. Medical Terminology

    The patient went into cardiac arrest. The (-ac) portion of the word is a/an A. noun suffix B. plural suffix C. combining form D. adjective suffix

    asked by Brenda
  107. Medical Terminology

    A 16-year-old patient is having problems with a swollen gland on the left side of her neck. The physician is most likely to use __________ to determine if the gland has any atypical characteristics. A. auscultation B. percussion C. palpation D.

    asked by Brenda
  108. Global History

    How did the location of axis powers in Europe contribute to their defeat?

    asked by Gaby
  109. Global History

    what factors besides enfing the war in the pacific might have contributed to president Harry Truman's decision to drop the atomic bomb?

    asked by Gaby
  110. Medical Terminology

    During surgery 1 cm of subcutaneous fat is revealed. What does the prefix in the word subcutaneous mean? A. Across B. Under C. Around D. Within

    asked by Brenda
  111. physcis

    a 16990kg airplane lands with a speed of 91m/s on a stationary aircraft carrier deck that is 115m. find workk done by nonconservative forces in stopping the plan.

    asked by brittney
  112. Chem

    Argon makes up 0.93% by volumee of air. Calculate its solubility (mol/L) in water at 20C and 1.0 atm. Henry's law constant for Argon under these conditions is 1.5 x 10^-3 mol/L*atm.

    asked by Staci
  113. Chem

    A household bleach solution contains 5.25% (by mass) NaClO. How many moles of NaClO are needed to make 1000L of the solution? (density = 1.07g/mL)

    asked by Staci
  114. physical science08

    regarding the Adiabatic Process.... why is their a dry adiabatic rate and a saturated adiabatic rate?

    asked by ellie
  115. Math

    Find an equation of the line containing the given pair of points. (-5,-2) and (-3,-1). The equation of the line in slope-intercept form is y=. Here is what I came up wiyh: y=1/2x-1/2. Is this correct? I am confused on this problem. Could someone please

    asked by B.B.
  116. trig

    an airplane leaves the airport and flies due west 150 miles and then 240 miles in the direction 200°40'. Assuming the earth is flat, how far is the plane from the airport at this time( to the nearest mile)?

    asked by kat
  117. physics

    A progressive and a stationary simple harmonic wave each have the same frequency of 250Hz and the same velocity of 30m/s. Calculate (i) the phase difference between two vibrating points on the progressive wave which are 10cm apart. (ii) the distance

    asked by Edwin
  118. Math

    Graph using the slope and the y-intercept. x+5y=20. Here is what I came up with: 5y=x(0)+20 5(0)= x+20 5y/5=20/5 x=20 (20,0) y=4 (0,4) The graph does not have a 20 on it. On the y axis it goes up to 10 and down to -10. On the x-axis it goes from 10 to -10

    asked by B.B.
  119. Chemistry

    A solution is made by dissolving 0.100 mol of NaCl in 5.35 mol of water. What is the mass % of NaCl? So far, I have determined molecular weight of NaCl (58.44 g/mol) multiplied by 0.100 mol = 5.844g NaCl, and mw of H2O (18 g/mol) = 96g H20. I thought mass

    asked by Jon
  120. Pre-Cal

    use a graphing calculator to obtain the graph of the function. What do you observe about its asymptotes? g(x) = 4 [x-2] / x + 1 My answer was there are two horizontal asymptotes. My teacher said that there are two asymptotes but she wants me to find the

    asked by Hannah
  121. physical geography

    Regarding to the adiabatic Process.. Why is there a DRY ADIABATIC RATE and a SATURATED ADIABATIC RATE?

    asked by ellie
  122. Attn: DrBob

    A household bleach solution contains 5.25% (by mass) NaClO. How many moles of NaClO are needed to make 1000 L of the solution? (density = 1.07g/mL) This is the complete question on my assignment. It's 1000 L.

    asked by Staci
  123. Math

    Write an equation of the line containing the given point and perpendicular to the given line. (8,-6); 3x+5y=8. The equation of the line is y= Here is what I have: 3x+5y=8 5y=-3x+8 y= -3/5(x)+8/5 y=5/3(x)=b -5=5/3(5)+b -5=25/3+b -15=25+3b -40=3b b= -40/3=

    asked by B.B.
  124. math

    In Quadratics Grade Ten:How do you find the coordinates of the vertex? What is the Optimum value mean? What are the zeros of the relation? How do you know if the parbola is Maximum or Minimum?

    asked by confused
  125. Chemistry 2

    In a study designed to prepare new gasoline resistant coatings, a polymer chemist dissolves 6.053g of poly in enough water to make 100.0 mL of solution. At 25C, the osmotic pressure of this solution is 0.272 atm. What is the molar mass of the polymer

    asked by Mike
  126. social studies

    How has early memory research concerning the growth of cognitive perspectives in psychology changed over the course ofthe 20th century?

    asked by sandra
  127. math

    you currently have 12 bottles on you shelf.and you want to keep a min of 6 bottles on you shelf.you average sales is 2 per day what is the min you would order for enough bottles for 7 days

    asked by kaila
  128. Chemistry problem

    Hi I'm stuck on these questions can you please help me A soil sample contains 0.2234 g of Fe3+ per 100g. Fe3+ is precipitated when the soil becomes alkaline as shown in the equation below. Fe3+ + 3OH- + (x-1)H2O „_ FeOOH.xH2O(s) This soil is sprayed with

    asked by Sarah
  129. Chemistry

    Hi I just need help with question (ii) and (iii), i know how to work out (i) A solution is prepared by dissolving 0.2222 (±0.0002) g of KIO3 in 50.00 (±0.05) mL (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of

    asked by Jenny
  130. psy270

    People with different personalities can be given the same diagnosis why is that need help cant not find the answer i am lookig for or how to word it .

    asked by trudy
  131. CHEM

    The first excited state of the hydrogen atom is separated from the ground state by 10.2 eV. (a) At what wavelength does this occur and what is the energy difference in kJ mol-1

    asked by ABBY
  132. CHEMISTRY

    Hey 1)how do you estimate the line widths (full width half maximum) of the peaks arising from: (a) The emission of a hollow cathode lamp (b) The absorption peak of caffeine in the UV –visible spectrum (c) The d-d transition observed for Ni2+ in aqueous

    asked by Kelly
  133. chemistry

    A copper wire weighing 5.463g was dissolved in excess nitric acid, precipitated as copper(2)carbonate with excess sodium carbonate, and then converted tooo copper(2) sulfate pentahydrate using excess sulfuric acid. A student carrying out these reactions

    asked by 496935sd
  134. STATS/CHEM

    I get how to use the method of least squares to determine slope, intercept, uncertainties in slope and intercept of your graph and but am confused how to determine the error of mole percent stated in (ii) The following are peak areas for chromatograms of

    asked by Ashley
  135. physics

    A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 208 km when traveling at 5.8 km/s. (a) What maximum distance from Earth's surface does it travel before falling back to Earth?

    asked by nate
  136. math

    the perimeter of a rectangle is 228 inches. the length exceeds the width by 76 inches. find the length and the width.

    asked by Queeny
  137. Biology

    True or False?: The random segregation of chromosomes during meiosis explains Mendel's observation that genes for different traits are inherited independently of each other.

    asked by I Need Help
  138. algebra

    25a2 - 30a + 9

    asked by Anonymous
  139. math

    At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 17 knots. How fast (in knots) is the distance between the ships changing at 5 PM? (Note: 1 knot is a speed of 1 nautical mile per

    asked by bob dylan
  140. physics

    A mountain climber friend with a mass of 80kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs. He wonders what the approximate size of such baloon would be.

    asked by Gail
  141. his 135

    was nixon's presidency a success? i feel it was because he had the foreign policy and draft ? anything else i can add? can be great besides the watergate scandal was he a success/

    asked by bobbi
  142. Algebra

    Retail Sales. Paint Town sold 45 paintbrushes, one kind at $8.50 each and another at $9.75 each. In all, $398.75 was taken in for the brushes. How many of each kind were sold?

    asked by Rodri
  143. physics help

    particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then

    asked by beav
  144. Dobson

    a)The element with the greatest density is osmium, which has a density of 22.6g/cm3. Calculate the mass of 32.1 cm3 of osmium. b)A team of students determined the density of a sample of wood to be 0.52 g/cm3. A handbook of chemistry reported the density of

    asked by Anonymous
  145. world history

    why are farmers today not as tightly bound by geography and climate as they were in the past

    asked by jane
  146. Spanish

    What is the 12 calzones?

    asked by Jenny
  147. physics

    A 14.5 metal wire is cut into three equal pieces that are then connected side by side to form a new wire the length of which is equal to one-third the original length. What is the resistance of this new wire? Answer in units of .

    asked by Anonymous
  148. physics

    A 14.5 metal wire is cut into three equal pieces that are then connected side by side to form a new wire the length of which is equal to one-third the original length. What is the resistance of this new wire? Answer in units of .

    asked by Anonymous
  149. physical science

    find the net force produced by a 40 Newton force and a 50 Newton force in each of the following cases: Both forces act in the same direction. Both forces act in opposite directions.

    asked by natasha
  150. chm152

    PCl3 + Cl2 = PCl5 Kc=26 @ 250 degree Celcius 1.0 mol of PCl3 , 1.0 mol of Cl2 , and 5.0 mol of PCl5 are placed in a 10.0L flask at 250 C and allowed to come to equilibrium. What is the concentration, in M,of cl2 of at equilibrium? Choose one answer. a. 3.4

    asked by ami
  151. Chemistry

    0.12 g of rock salt(NaCl and impurities) was dissolved in water and titrated with 0.1 M silver nitrate. 19.7 mL was required to titrate all the chloride ion. How many moles of sodium chloride were in the original sample and what percent of the sample are

    asked by Mary
  152. Chemistry

    Alcohol levels in blood can be determined by a redox titration with potassium dichromate according to the balanced equation: C2H5OH(aq) + 2Cr2O7(-2) (aq) + 16H+(aq)---> 2CO2 (g) + 4 Cr3(+)(aq) + 11H2O (l) What is the blood alcohol level in mass perecent if

    asked by Mary
  153. Math(Please help)

    divide by long division. divide x^3 + 4x^2 - 3x - 12 by x^2 - 3

    asked by Abbey
  154. math/hurry

    The ratio of boys to girls in Mr. Joiner’s class is 5 to 7. If there are 15 boys in the class, how many total students are in the class?

    asked by Kirk
  155. math/hurry

    A plumber needs four sections of pipe 2 7/8 feet long. Can this be cut from a 12 foot section? If so, how much pipe will be left over? If not, why not?

    asked by Kirk
  156. chemistry (quatatative analysis)

    How many grams of Ba(IO3)2 can be dissolved in 500 mL of a 0.100 M KIO3 solution at 25 oC? Use activities for this calculation. The solubility product constant for Ba(IO3)2 is 1.57×10-9 at 25 oC.

    asked by Annabelle
  157. math

    If you have a grade average at 50% and you score 89% percent on a test what does your grade equal out to?

    asked by tarra
  158. statistics

    Suppose that large dogs weights are normally distributed with a mean of 100 pounds and a standard deviation of 10 pounds. If one of these dogs is picked random: a) what is the probability that the dog will weigh over 110 pounds? b) what is the probability

    asked by Anonymous
  159. statistics

    Compare the two sets and describe what you discover. 57,61,57,57,58,57,61 61,52,69,64,46,54,47,

    asked by shelly
  160. statistics

    Find the standard deviation using the rule of thumb for each of the data sets 57,61,57,57,58,57,61 61,52,69,64,46,54,47

    asked by shelly
  161. Physics

    The smallest object visible to the unaided eye is of 100 microns. If you use a microscope of m=1000, what is the size of the smallest object you can now see? (So=25cm) The answer is apparently 100nm. I am still confused as to why. Please help!

    asked by Jane
  162. Math - Trig

    Given that a measures 25.1 mm, x measures 51.2 mm and angle b measures 82°, find the length of y -

    asked by TT
  163. college trig

    From a point on the ground a person notices that a 110-ft tree on top of a hill subtends an angle of 3°. If the angle of elevation to the bottom of the tree, represented by angle A in the figure below, measures 37°, find the height h of the hill

    asked by smith
  164. Earth Science

    What is the primary basis for differentiating the Eras?

    asked by Abbey
  165. math . . .

    To measure the height of an inaccessible cliff on the opposite side of a river, a surveyor makes the measurements shown in the figure ( one angle is 33.1 & the other i 69.4) . If distance d = 202 meters and Ð b = 50.0°, find the height of the cliff. the

    asked by Thank You For The Help
  166. physics

    A beam of electromagnetic waves of a wavelength 3.0cm is directed normally at a grid of metal rods, parallel to each other and arranged vertically about 2.0cm apart. Behind the grid is a receiver to detect the waves. It is found that when the grid is in

    asked by Edwin
  167. physics

    water flows along a horizontal pipe of cross-sectional area 48cm^2 which has a constriction of cross-sectional area 12cm^2 at one place. If the speed of the water at the constriction is 4 m/s, calculate the speed in the wider section. The pressure in the

    asked by Edwin
  168. physics

    Show that a force acting along a given line can always be replaced by a force of the same magnitude acting along a parallel line, together with a couple.

    asked by Edwin
  169. Earth Science

    which geologic era had the shorest time span and the longest time span? 1) Longest = paleozoic 20 shortest = cenozoic Is this correct?

    asked by Abbey
  170. Physics

    A small fish is inside a spherical bowl filled with water (n=1.33). The bowl has a diameter of 30cm and the fish is at a distance of 5cm from the surface that separates water and air (ignore the effects of the glass of the bowl). The image of the fish is

    asked by Sandra
  171. Earth Science

    What is the major source of free oxygen in the atmosphere? Would it be trees?

    asked by Abbey
  172. Financial Management in Health Care Organizations

    $5,000 compounded semiannually at 6% for 5 years

    asked by Virginia
  173. Physics

    The refractive index of a material is different for different wavelengths and colours of light. For most materials in the visible range of the electromagnetic spectrum, shorter wavelengths have larger refractive index compared to longer wavelengths. The

    asked by Sandra
  174. physics

    If the relative humidity is 66.8% in the middle of a spring day in auckland when the temperature is 15 degrees celsius, What will the relative humidity be in the evening when the temperature falls to 10 degrees celius (Assume the partial pressure of water

    asked by Steve
  175. Physical Science

    Wave amplitude is related to A)wave velocity B)frequency C)energy D)wavelength

    asked by Kim Love
  176. Ivy Tech

    The source of magnetism is A)polarization B)magnetic monopoles C)electrons D)protons

    asked by Kim Love