Questions Asked on
January 31, 2015

  1. math help

    (x+5)^2 - (x-5)^2 is factored, it can be written as Ax where A is a whole number. The value of A is?

    asked by Jim
  2. Calculus

    Hello, I really need help on these two homework problem. >< In problem #1, I believe it is related to the exponential functions and their derivatives section...in Calculus II? So, surely there should be a ln in the solution as well? I would like a step by

    asked by Aria
  3. Trigo

    Two observers on opposite sides are 350m apart and are looking at a balloon if the angles of elevation from each observer are 30degree and 60degree respectively,how high is the balloon?

    asked by Dend
  4. Trigo

    a ship sails due north from port 90 km,than 40 km east and then 70 km north, how far is the ship from port

    asked by Dend
  5. math - hw help

    A rectangular picture is 3cm longer than its width, (x+3). A frame 1 cm wide is placed around the picture. The area of the frame alone is 42 cm^2. Find the length of the picture _______cm. _________________ ________ ! ! ! ! ! ! ! ! !x+6 ! ! ! ! ! ! !

    asked by Elias
  6. Physics

    Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 68.5 N, Jill pulls with 61.3 N in the northeast direction, and Jane pulls to the southeast with 111 N. (Since the donkey is involved with such uncoordinated people,

    asked by Jordan
  7. math

    one out of 42 high school ball players plays college ball. one out of 47 college players plays professional ball. what fraction of high school players professional ball?

    asked by Anonymous
  8. Statiatics

    A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered neither of the problems correctly?

    asked by Jenny
  9. Calculus

    Write 2.445353535353... as a fraction I'm learning integrals right now and this is part of the exercises under it. Is there a trick to this? Using integrals? Thank you very much!

    asked by Alex
  10. General Paper

    "Do we expect too much from public figures?" I wrote an introduction. I agree to the question raised. Please take a look at the introduction I wrote and also comment on my draft for the next few body paragraph. I have yet add in a example to paragraph 2

    asked by Sing
  11. MATHS

    The average of two numbers is 81. The difference between the number is 26. What is the smaller number?

    asked by Sarah JJ
  12. Natural science

    What is vegetative reproduction?

    asked by Vuyiseka
  13. physics

    Three point charge are located at a line 20cm with charge q1= -3uC, q2= +4uC, q3= -7uC. Determine the magnitude of the force.

    asked by ama
  14. Pure math,Life science,Geography and History

    Hi I'm grade10 and I was wondering if you's could help Me to get a career examples after matric because my school took away our Physics for unknown reasons so insted of Physics or another subject that would help you in the future they gave us History

    asked by Zenande Snyman
  15. Maths Problem

    Please help me to solve this.... The average of two numbers is 81. The difference between the number is 26. What is the smaller number?

    asked by Sarah JJ
  16. algebra

    The price of salt goes up by 9 cents. The old price goes up by four-fifth of new prices. Find old and new price.

    asked by Anonymous
  17. algebra

    The price of salt goes up by 9 cents. The old price goes up by four-fifth of new prices. Find old and new price.

    asked by Anonymous
  18. algebra

    The price of salt goes up by 9 cents. The old price goes up by four-fifth of new prices. Find old and new price.

    asked by Anonymous
  19. math

    Express 0.78 .as a fraction a/b where a,b,=integer

    asked by Anonymous
  20. Trigo

    A flagpole 12.5m high stands at the top of a bldg. From a pt. P on the street the angle of elevation of the top of the pole is 54 degrees and the angle of elevation of the foot of the pole is 46 degrees. How high is the bldg.?

    asked by Why?
  21. EDU 650

    compare and contrast what the authors identify as 21st century skills with what you would identify 21st century skills

    asked by Fay
  22. Math

    at a boutique, an evening gown is marked at a profit of 40% on the cost price. it is sold in a sale at 20% discount. a. Find the actual profit as a percentage of the cost price. b. if a customer bought it for $448, find i. the marked price ii. the actual

    asked by Sayaka
  23. Statistics

    The following contingency of frequencies is based on a 5-year study of fire fatalities in Maryland. For purposes of clarity, columns and rows are identified by the letters A-C and D-G, respectively. Blood Alcohol Level of Victim A B C Age 0.00% 0.01-0.09%

    asked by jcukane
  24. statistics

    The following contingency of frequencies is based on a 5-year study of fire fatalities in Maryland. For purposes of clarity, columns and rows are identified by the letters A-C and D-G, respectively. Blood Alcohol Level of Victim A B C Age 0.00% 0.01-0.09%

    asked by jess
  25. Math

    If the original number is 8.6 and the new number is 7, what is per cent decrease ?

    asked by Jon 6 grade
  26. elementary differential geometry

    Suppose that all the tangent lines of a regular plane curve pass through some fixed point. Prove that the curve is part of a straight line. Prove the same result if all the normal lines are parallel.

    asked by thida
  27. anthropology

    Why do kinship systems work? Where, if any, would you find a working kinship system within the United States? Give examples for both questions. This is my answer, am I right? Most of us are in a kinship system with spouses, children, parents, grandparents,

    asked by jimmy
  28. Anthropology

    In every culture, cultural constructs will be found. What are the cultural constructs found in the U.S., and how are they used to define gender in society? Compare gender constructs in Pastoralist societies. What differences do you find between the United

    asked by jimmy
  29. Add maths form 4

    The quadratic equation 2qx(x+1)-8x^2-1, where q is a constant, has no real roots. Find the range of values of q. Answer given is -2

    asked by Sha
  30. Criminal Justice/Judicial System

    Congress has delegated the responsibility of setting the rules of practice, procedure and evidence in federal courts to the ___________ of the United States. A. federal judges B. state judiciary C. Rules Committee D. Judicial Conference *34 L03 I think

    asked by Pat
  31. Physics

    The space shuttle is in a 3e+5 m high orbit over the earth. The radius of the earth is 6.37e+6 m, the mass of the earth is 5.98e+24 kg. What is the distance from the center of the earth to the space shuttle? I don't know whether I would double the radius

    asked by Carly
  32. chemistry

    The radiator in your car uses either water or ethylene glycol (anti-freeze) to remove heat from the engine and dissipate it to the outside air. If the water recirculation rate is 17.0 kg per minute of water and the water temperature leaving the engine and

    asked by danny
  33. chemistry

    What is the specific heat capacity of ethanol (C 2H 6O) if a 18.3 g sample increased 12.3 C upon the addition of 553.0 J? The units are J/(g ·K)

    asked by danny
  34. Chemistry

    How many rams of 96.5% pure NaOH pellets do you need to make 1 liter of 1.5 N NaOH?

    asked by Gordon
  35. math

    A clock was set on Monday at 8.30 a.m. On Tuesday, the following day, the clock showed 8.45 p.m. when the correct time was 8.30 p.m. How many minutes was the clock gaining in every 24 hours?

    asked by kudu
  36. math

    John and David had packets of tea to be packed into cartons. Each carton holds 46 packets. John packed 63 cartons and remained with 24 packets while David packed 54 cartons and remained with 19 packets. How many more packets of tea had John than David? =

    asked by kudu
  37. Math

    A rectangular container 45cm long and 25cm wide was full of water. After removing 22.5 liters of the water, the level of water became 4cm high. What was the height of the container?

    asked by kudu
  38. math

    In a group of 126 spectators the ratio of men to women was 3:4. What is the new ratio if 2 more men and 8 more women joined the group of spectators?

    asked by kudu
  39. math

    A rectangular plot of land measures 40m by 30m. There is a wall on one of the longer sides. Four strands of wire are to be used to fence the three remaining sides of the plot. What length of wire is required?

    asked by kudu
  40. Chemistry

    What is the enthalpy change when 25 g's of PCl5 are decomposed /\ H= 90

    asked by Anonymous
  41. Anthropology

    why the kinship system work? Answer Because it help out the people

    asked by jimmy
  42. chemistry

    The enthalpy change for the following reaction is -483.6 kJ: 2H2(g) + O2(g) = 2H2O(g) Therefore, the enthalpy change for the following reaction is _______ kJ: 4H2(g) + 2O2(g) = 4H2O(g)

    asked by danny
  43. Physics

    the charge on a pith ball was measured as +40 nC. if the charge on an electron is -1.6 x 10^-19, how many electrons have been added or removed from the ball?

    asked by Elena
  44. Calculus

    Differentiate: y = (x^2 + 8x +3)^3

    asked by Wes
  45. Pre Calculus

    Can someone help me with this problem? Determine the number of positive integers less than 10,000 that can be formed from the digits 1, 2, 3, and 4 if repetitions are allowed. Thank you!

    asked by Anonymous
  46. Anthropology

    Where, if any, would you find a working kinship system within the United State

    asked by jimmy
  47. Math

    The number of women passengers in a bus was X. The number of children in the bus was three times that of men passengers but was 6 more than that of women. Write equation that shows the total number of passengers in the bus?

    asked by kudu
  48. Math

    A pill weighs 70 mg. 7/9 of the pill is the active ingredient. How many milligrams are in the part of the pill that is not the active ingredient? So if 7/9 is active that means 2/9 is not active. I did 2 divided by 9 which gives me .22 I then multiplied 70

    asked by Luis
  49. Physics II

    Please can anyone explain. Thank you. A rocket is launched vertically from ground with a constant acceleration. If the rocket emits a burst of sound every five seconds after launching, find the difference of intensity levels observed at the launching site

    asked by ANA
  50. Math

    Samuel, Elis and David sell newspapers. One day David sold 20 newspapers more than Elis who sold 10 newspapers more than Samuel. The total number of newspapers they sold that day was 140. If Elis sold y newspapers, write the equations can be used to find

    asked by kudu
  51. math

    5,280 divided by 9 = is what?

    asked by Anonymous
  52. Statistics

    The height of a bluebird was measured in centimeters. If the ruler reads 10.599 centimeters, what is the lower real limit of the bluebird's height? I know the lower limits of 10 are 9.5 or 10.5 after we go further I don't understand how to get the rest of

    asked by Anonymous
  53. Stats

    A classroom of n = 10 children has a mean score of 17.200 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 18.000. Find the value of the new

    asked by Luis
  54. georgia state history

    Which grouping lists the main reasons for European exploration? A) "God, glory, and gold" B) "Salt, silk, and spices" C) "Rum, slaves, and molasses" D) "Trade, silver, and jewels"

    asked by jam
  55. math

    on a map, the key indicates that 2.5 centimeters equals 10 miles. a road on the map runs for 30 centimeters. how long is the road?

    asked by jorge
  56. chemistry

    What mass of solid sodium formate (of MW 68.01) must be added to 115 mL of 0.57 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 4.16? Ka = 0.00018 for HCOOH. Answer in units of g

    asked by Anonymous
  57. chemistry

    What is the concentration of hydrogen ions in a solution containing 0.645 M HOCN (cyanic acid) and 0.235 M (NaOCN) (sodium cyanate)? The ionization constant of cyanic acid is 3.5 × 10−4 . Answer in units of M

    asked by Anonymous
  58. COMM/215

    I would like to know if i have used properly structured sentences for the following: 49. To succeed in the new economy, workers will have to learn throughout their careers adapt to changing circumstances, and self-motivate when needed. 50. Some students

    asked by Frank
  59. COMM/215

    I would like to know if i have used the correct grammar and punctuation in the following two sentences: 47. "Have you ever read the story, 'The Tell-Tale Heart' by Edgar Allen Poe?" Dave asked. 48. "Did the professor say, 'Put down your pencils'?" Janice

    asked by Frank
  60. chemistry

    A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.23 moles of KOH into 720 mL of solution. What is the pH of this buffer? Ka = 6.2 × 10−6 for HA. Answer in units of pH. i need the answer

    asked by Anonymous
  61. Calculus

    Compute the maximum and minimum amount of a drug remaining in a patient in the limit (that is, as time tends to infinity) given that the patient takes an 80 milligram dose once a day at the same time each day and the drug has a half life of 22 hours.

    asked by Jona
  62. American History 1 HY1110

    The Spanish, French, and English all explored America and left a lasting mark on the New World�s development. Compare and contrast the colonization methods used by each. Be sure to discuss the goals, characteristics, and lasting effects of each power's

    asked by Hope
  63. physics II

    A rocket is launched vertically from ground with a constant acceleration. If the rocket emits a burst of sound every five seconds after launching, find the difference of intensity levels observed at the launching site for the first and the second bursts of

    asked by ANA
  64. geometry

    if the lengths of the sides of one triangle are 2 inches 5 inches and 7 inches respectively in the shortest leg of a similar triangle is 4 inches what is the perimeter of the second triangle in inches?

    asked by keyna
  65. math

    what is the greatest common factor of the polynomial show? rectangle tiles that have 6x and 6 look like this: ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** !!! !!! !!! !!! !!! !!!

    asked by Jason
  66. math

    When a car makes an emergency stop on dry road, it leaves skid marks. The speed S, in miles per hour, of the car when brakes were applied is related to the length L, in feet, of the skid mark. Functional notation is needed, please help.

    asked by Marcquillia
  67. Anthropology

    Marriage patterns vary by culture themselves. In some cultures, such as in Saudi Arabia, the practice of plural marriage is accepted and promoted. This particular practice, known as polygyny, refers to a man taking more than one wife. In the United States,

    asked by jimmy
  68. SS ANYONE HELP?

    Describe significant events in the social and economic reconstruction of the South. Why are these events significant?

    asked by Christina
  69. Ss help 8th

    Compare and contrast the experiences of the Creeks and Cherokees in Georgia following the War of 1812

    asked by Christina
  70. chemistry

    In the reaction below, ΔH°f is zero for ___________. Ni(s) + 2CO(g) + 2PF3(g) = Ni(CO)2(PF3)2(l) Ni(s) CO(g) Ni(CO)2(PF3)2(l) both CO(g) and PF3(g) PF3(g)

    asked by danny
  71. chemistry

    The ionization constant of HA is 1 × 10−6 . What must be the ratio of [A−] to [HA] for the preparation of a buffer solution with a pH of 6.77? whats the answeer??????

    asked by Anonymous
  72. chemistry

    A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.23 moles of KOH into 720 mL of solution. What is the pH of this buffer? Ka = 6.2 × 10−6 for HA. Answer in units of pH. please i need the answerf

    asked by Anonymous
  73. Anthropology

    what differences between the United States and a Pastoralist society? My answer Both of these societies had a more complex social organization and have increased specialization. Due to material surplus, labor distribution was unequal and so was social

    asked by jimmy
  74. s

    The fish didn't take , ,as they periodically teased the boys,nibble at bit,they jumped ,as the jumping within arm"s reach of the boy,were on bank.I had combine does it make sense

    asked by Anonymous
  75. math

    the point t' (-4,-7) is the image of point t under a transformation. if point t is (-4,7) what translation could have occurred

    asked by Haan
  76. chemistry

    The figure shows a cube of air at pressure 1.0 atm above a hot surface on Earth. Contact with the hot surface causes the volume of the air to expand from 2.00 × 105 L to 2.20 × 105 L by the transfer of 8.2 × 106 J of heat. Assume the systems are

    asked by Morgan
  77. Chemistry

    Answer the following questions about energy changes associated with heating and cooling a substance. Use the quantities in the table for your calculations. (table) Specific heat of water /4.184J/g*K dealta H vap for water /40.7 kJ/mol dealta H fus for

    asked by Morgan
  78. Program Designs

    The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design Visual Logic Flowchart for a program that accepts data

    asked by Joel
  79. chemistry

    2C2H2(g) + 5O2(g)→4CO2(g) + 2H2O(g) a. Determine the enthalpy change for the reaction. ΔH = (4(-393.5)+ 2(-241.8)) – (2(227) + 5(0)) The enthalpy change is -2511.6. b. Determine the entropy change for the reaction. ΔS = (4(213.7)+ 2(188.7)) –

    asked by Morgan
  80. Chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

    asked by Morgan
  81. georgia state history

    Tomochichi’s trip to England with James Oglethorpe was important because A) the English wanted to meet Oglethorpe’s Native American friends. B) it showed the goodwill between the Native Americans and the English. C) Oglethorpe wanted Native Americans

    asked by jam
  82. chemistry

    Suppose you add 92 ml of dilute acid to 46 ml of water. Both the water and acid were at room temperature (22 C) before being mixed. The temperature of the solution increased to 39 C. How much energy (in kJ) was released by the dissolution of the acid if

    asked by danny
  83. chemistry

    Suppose that your morning shower is 7 minutes long and uses 4 gallons of water per minute that is a nice 102 F in temperature. How much energy (kJ) must be used to heat the water for your shower if the water coming into your house is at 60 F? The heat

    asked by danny
  84. Spanish

    Can someone check my answers to this? I'm really confused on these practice problems. Thanks! Directions: Using informal, formal, plural and nosotros commands (use Dop's/Iop's if needed) to correctly answer the questions. The names in parathenisis are what

    asked by Sophia
  85. georgia state history

    James Wright was an effective and admired colonial Georgia governor. His popularity with the colonists allowed him to A) encourage more colonists to establish communities in Georgia’s frontier. B) expand Georgia’s territory through negotiations with

    asked by jam
  86. advanced functions

    Marko rides 10 km north of his home on his mountain bike. He reaches an abandoned railroad, turns through an angle of 120° onto the railroad, and then rides another 20 km.

    asked by Juhi
  87. Math- Vector Calculus

    A manufacturer sells two products, one at a price of $3000 a unit and the other at a price of $12000 a unit. A quantity q1 of the first product and q2 of the second product are sold at a total cost of $5000 to the manufacturer. Express the manufacturer's

    asked by Javier
  88. chemistry

    Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) gas and calcium hydroxide (Ca(OH)2). If the ΔH for: CaC2(s) + 2H2O(l) = Ca(OH)2(s) + C2H2(g) is -127 kJ, then what is the enthalpy of formation for calcium carbide? The ΔH of formation for

    asked by danny
  89. chemistry

    Given: Equation #1: 4NH3(g) + 5O2(g) = 4NO(g) + 6H2O; ΔH of reaction = -1170 kJ Equation #2: 4NH3(g) + 3O2(g) = 2N2(g) + 6H2O; ΔH of reaction = -1530 kJ Then what is the ΔH of reaction for: N2(g) + O2(g) = 2NO(g)? Enter a numerical value below and be

    asked by danny
  90. math

    Three pupils John, Daniel and David contributed a total of $400 for a party. John contributed $30 more than Daniel while, David contributed three times as much as John. If David contributed $x, write the equation can be used to find David's contribution?

    asked by kudu
  91. chemistry

    Welders often use acetylene torches heat up the metal. The reaction is: C2H2(g) + 2.5O2(g) = 2CO2(g) + H2O(g) Calculate the ΔH of reaction for this reaction.

    asked by danny 16
  92. Chem

    The decay constant for a radioactive isotope is 7.82 x 10-6 /y. What is the half-life of this isotope in years?

    asked by Brooklyn
  93. physics

    An athlete performing a long jump leaves the ground at a 27.1∘ angle and lands 7.72m away 1.What was the takeoff speed? 2.If this speed were increased by just 5.0%, how much longer would the jump be?

    asked by Kelly
  94. georgia state history

    What governing body did the Georgia Charter of 1732 establish?

    asked by jam
  95. algebra

    Solve by factoring: x2 + 5x = −6 x^2 + 5x + 6 = 0 2+3 = 5 and 2x3 = 6 so (x-2)(x-3) = 0 then x-2=0 or x-3 = 0 x = 2 or x = 3 Did I do this right??

    asked by slomo
  96. Math

    I am 4-digit odd number. I am greater than 7000. The digit in my hundreds place is smaller than the digit in my tens place. What number can I be if I am made up of all the digits shown below? 6827

    asked by Anaqi
  97. Physics

    A bird sits at rest in the middle of a wire. The wire slopes upward at 5* from the horizontal on either side of the bird. If the wire on both sides of the bird is experiencing a tension force of 106 N, then what is the mass of the bird?

    asked by Madison
  98. georgia state history

    Which political development greatly increased tensions between the American colonies and Great Britain in the years just before the American Revolution?

    asked by jam
  99. English, Business English, Communications

    I revised this memo to approve the you-attitude. Can someone tell me if I did it correctly? If I didn't what did I do wrong. I worked on this for 3 hours! Subject: Status of Building Renovations We are happy to announce that the renovation of the lobby is

    asked by Miguel
  100. Physics

    In the picture to the right, a ring pulls a box of mass m = 5.0 kg across a level table. The string pulls with a tension F = 25.0 N at an angle θ = 25˚ above the horizontal. A frictional force of 4.0 N also acts on the box. Calculate a. the normal force

    asked by Madison
  101. math

    what are the coordinates of the shadow cast on the xy plane by a small object placed at the point (10,7,20) assuming that the sun's rays are parallel to the vector (5,3,-2)

    asked by annie
  102. chemistry

    Calculate the ΔH of reaction for: C2H4(g) + H2O(l) = C2H5OH(l) if the ΔH of formation for C2H4(g), H2O(l) and C2H5OH are +52, -286 and -278 kJ/mol, respectively? Enter a numerical value below and be sure to include a minus sign if needed. The error

    asked by danny 16
  103. Physics

    Particles of charge +65, +48, and −95 μC are placed in a line. The center one is L = 60cm from each of the others.Calculate the net force on the left charge due to the other two.

    asked by Mary