Posts by Mary

Total # Posts: 3,910

  1. math please help and hurry!!

    What is the rate of change for 2x^2 + 3 and 2^x + 3?? I have no idea please help meeeeeeeee
  2. Physics

    A ball rolls down a ramp that's set on a table, and from there falls off the table. The height of the ramp, length of the ramp, and height from the table are known, and the task is to find the horizontal displacement. One can use mgh = 1/2mv^2 + 1/2kmv^2 to find the ...
  3. Physics

    A ball rolls down a ramp that's set on a table, and from there falls off the table. The height of the ramp, length of the ramp, and height from the table are known, and the task is to find the horizontal displacement. One can use mgh = 1/2mv^2 + 1/2kmv^2 to find the ...
  4. chemistry

    Calculate the [H?] for the aqueous solution in which [OH?] is 1 x 10??. Is this solution acidic, basic or neutral? Show your work
  5. english

    the answer, i think, is who
  6. ELA

    The answer to them is: 1.What does the speaker in "in Just—" mean when he says that "the world is puddle-wonderful"? A. The world is full of puddles. B. Spring is rainy and wet.#### C. Winter's drought has ended. D. The balloonman fell into a ...
  7. English

    Please show me an agumentative essay on boys helping girls in the kitchen
  8. SOCIAL STUDIES HELP PLEASE!!!

    ohhh thank you for the kid site i think that helped thank you
  9. SOCIAL STUDIES HELP PLEASE!!!

    Well i sorta did but i don't know i think i just needed a help start i will try to make something outta it thanks for the link
  10. SOCIAL STUDIES HELP PLEASE!!!

    I did but i don't find the information usefull but anyways thank you Ms.Sue
  11. SOCIAL STUDIES HELP PLEASE!!!

    how did the supreme court decision in Worcester V.Georgia and the Indian removal act lead to the removal and resettlement of native Americans groups? Can anyone help me with this please?
  12. spanish

    nos
  13. Chemistry

    The relative atomic mass of natural lithium is 6.95 it consist of two isotopes of relative masses 6.02 7.02 calculate the natural abundance of the isotopes
  14. Ms.sue....

    how can i do it then?
  15. Math

    Left hand! right hand Female___!________ Male_____!_______ Total-18 ! 122 The incomplete table above summarizes the number of left-handed students and right-handed students by gender for the eighth grade students at Keisel Middle School. There are 5 times as many right-handed ...
  16. Reed

    yay!
  17. Reed

    i never got banned
  18. Reed

    how do you know? this is what you said... Trying to give and get answers here is frowned upon. The object is to help students learn, not just give away answers so that nobody has to study and learn anything. Giving away answers can get a person banned from Jiskha, temporarily ...
  19. science

    is it D
  20. science

    C=5/9(F-32) The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Celsius. Based on the equation, which of the following must be true? A temperature increase of 1 degree Fahrenheit is equivalent to a ...
  21. Music

    how do you know?
  22. Math/Science

    MEAN: 328.5 (green), 296 (red), 342.22 (bicolour)
  23. Math/Science

    Reaction Time (ms) Cue Colour Green Red Bicolour (red only) 1 680 650 460 2 480 470 310 3 350 300 270 4 300 470 300 5 320 290 610 6 260 290 300 7 290 220 340 8 260 280 230 9 320 250 260 10 440 330 11 270 230 12 270 220 13 250 280 14 250 260 15 250 300 16 230 240 17 260 240 18...
  24. physics

    A ball of mass 0.05 moving at 10m per seconds collides with another ball of equal mass at rest if two balls move off together after the impact calculate the common velocity
  25. Algebra 1

    USE REGRESSION, FIND BEST FIT EQUATION FOR DATA (1,56), (2, 29), (3, 13), (4, 7), (5, 2)
  26. Algebra 1

    Cassandra bought a car for 22,385. The value depreciates 14% a year. a. Write a function, d(x), that gives the value of the car after x years. b. What will the value of Cassandra's car be after 10 years
  27. Algebra 1

    Evaluate a(1)-b(1)
  28. Algebra 1

    Give a value for x such the A(X)>b(X)
  29. Algebra

    Factoring Polynomials GCF and Quadratic Expressions: 5b^2k^2+25bk^2-250k^2 The answer I figured was GCF for the polynomial is 5 and the GCF for the variable is bk^2. Is this correct.
  30. physics

    In a simple model of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 3.4 ? 106 m/s. Determine the radius of the electron's orbit. ___m
  31. How to solve algebra word problems

    c+e=5 $3.50c+15e=5(4)
  32. How to solve algebra word problems

    Pecans sells for $3.50 a pound. Almonds sells for $5 pound. How many pounds of each should be used to make 15 pounds of mixture that sells for $4 a pound?
  33. Math

    An older person is seven years older than six times the age of a younger person. The sum of their ages is 21. Find ages
  34. Physics

    A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to hitting the floor? I need...
  35. science

    so then it has to be "a" since the earth revolves in its axis in a 24 hour period of time
  36. science

    so then it has to be "a" since the earth revolves in its axis in a 24 hour period of time
  37. science

    The main cause of the changing location of the tides on earth is -rotation of the Earth on its' own axis - magnetic forces of the Moon - the revolution of the Moon around the Earth *** -the position of the Sun
  38. Spanish help please

    Libros b.Televisiones
  39. science

    the best explanation of why the Moon appears to change shape throughout the month is •from Earth's perspective, we see varying amounts of the illuminated part of the Moon. • the Moon is revolving around the Earth** • from a bird's eye view, the Moon is ...
  40. science

    thank you so much!
  41. science

    I think it is increases as latitude increase but I am not quite sure
  42. science

    the variation in seasonal temperatures and amount of daylight • decreases as latitude increases • changes most at the equator • stays the same at the North and South Poles • increases as latitude increases
  43. Algebra

    On a scale drawing if 1/4 of an inch represents a distance of 1 foot then a line on the drawing measuring 8 1/2 inches represents ? Feet
  44. I.ter.ational bussiness

    according to cnn (2016/06/24), the British pound (GBP) crashed to its lowest level as low as$1.32/GBP. The exchange rate on June 23rd 2016 was $1.4883/GBP a)by what % has the Gbp appreciated or depreciated against the dollar during this period? b)bu what % the US dollar ...
  45. I.ter.ational bussiness

    according to cnn (2016/06/24), the British pound (GBP) crashed to its lowest level as low as$1.32/GBP. The exchange rate on June 23rd 2016 was $1.4883/GBP a)by what % has the Gbp appreciated or depreciated against the dollar during this period? b)bu what % the US dollar ...
  46. SAT

    It says GPA= grade point average But for our local university entrance exams, we are studying Maths,Physics and Chemistry only.And the syllabuses may not be the same too.So how are we being compared? Do they conduct some kind of a placement test etc.when giving a scholarship?
  47. SAT

    What is G.P.A. by the way?
  48. SAT

    How much SAT score will be needed to get a scholarship to a good engineering university in the USA? I'm new to these things and hope someone will help,other than Google searching. Thank you!
  49. Universities

    Yeah I'm doing that and I was just wandering whether I would get info from someone from the States. Thank you!
  50. Universities

    What are the best universities in the USA which offers Transport and Logistics Management degree and what are the main requirements for an international student obtain a scholarship from that university for the mentioned degree? What are the chances for an internship after the...
  51. maths

    The rectangular backboard of a basketball court needs to be assembled. Its area is given as 18,900 cm2 and the width as 1.8 m. What is the backboard’s length in metres
  52. math

    the sum of the three numbers in GP IS 35 and their product is 1000. find the numbers
  53. Physics

    A charge of 5.00 ? 10^-9 C and a charge of -3.50 ? 10^-9 C are separated by a distance of 60.0 cm. Find the position at which a third charge, of 14.0 ? 10^-9 C, can be placed so that the net electrostatic force on it is zero.
  54. computer program

    How do you design a program that asks for the sale figures, computes the total sales for the year, and calculates and displays final sale figures for the four quarters in 2010 and displays the average quarterly sale for the year?
  55. Chemistry

    What is the molar concentration of K4Fe(CN)6 solution if 40 ml were used to titrate 150 mg of Zn ( that are dissolved ) forming K2Zn3[Fe(CN)6]2 ? I really need help for this excersice , I don't know what to do... Note: In my book the answer is 0,0382 M
  56. Chemistry

    calculate the delta G^o and Kc for the reaction: 2Al + 3I2 = 2Al^3+ + 6I-
  57. Chemistry

    The delta G^o for a reaction : h2 (g) + i2 (g) = 2HI(g) Is 2.6 kj/moles. In one experiment the initial pressures are P h2 = 4.26 atm, P i2 = 0.024 atm, P hi = 0.23 atm. Calculate delta G
  58. Chemistry

    The delta G^o for a reaction : h2 (g) + i2 (g) = 2HI(g) Is 2.6 kj/moles. In one experiment the initial pressures are P h2 = 4.26 atm, P i2 = 0.024 atm,
  59. stats

    Consumer Reports rated airlines and found that 80% of the flights involved in the study arrived on time (that is within 15 minutes of scheduled arrival time). Assuming that the on-time arrival rate is representative of the entire commercial airline industry, consider a random...
  60. science

    2. Compare and contrast deductive reasoning and inductive reasoning. Based on the information given here, answer the following questions about the experiment: • What are the qualities of deductive reasoning? • What are the qualities of inductive reasoning? • ...
  61. Math

    Start at 500. Create a pattern that subtracts 4 from each number. Stop when you have 5 numbers.
  62. Math

    Store a has a promotion if you Bryce three shirts you get 25% off the total price of the three shirts store be has the same shirts on sale with a promotion that if you buy three shirts you get the third shirt on a 50% discount store see has the same shirts on sale with a ...
  63. math

    If two trapezoids have the same perimeter do they have the same area?
  64. Maths

    60?
  65. English

    What are some of the differences between old money and new money characters in the great gatsby? Is this distinction important in today's society? Why is the novel narrated from Nick's perspective?
  66. Algebra

    One number is 2/3 of another number. The sum of the two numbers is 40. Find the two numbers. Use a comma to separate your answers.
  67. English

    how does the history of the American Dream show a difference between our ideals and the reality of growing inequality and lack of social mobility.
  68. Math

    The ratio of blue to red cars in a parking lot is 4/7. If there are 168 blue cars about how many red cars are there? 4/7=x/168 672=7x x=96
  69. math- integral

    Find the derivative of: G(x) = ?(top x) t^5 sin(?7t?4)dt . (bottom 9)
  70. Math

    How do I find the value of sin ( A-B) When tan A= 4/3 Cot B= 5/12
  71. physic

    Two currents from different sources flow in opposite directions through a resistor. I1 is measured as 79 mA on a 100 mA analog instrument with an accuracy of ±3% of full scale. I2, determined as 31 mA, is measured on a digital instrument with a ±100 µA ...
  72. math

    Find the degree 7 Taylor polynomial for f(x )= 2cos(3x) centered at x = 3?/2 . Thanks for your help
  73. core mathematics

    Two boats are 70m and on opposite sides of a lighthouse.from the two boats,the angles of elevation of the lighthouse are 71 and 45 respectively.find the height of the lighthouse.
  74. Chemistry

    Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid(HCN) and 0.150 M sodium cyanide (NaCN). The pKa of hydrocyanic acid is 9.31. What is the [HCN] after 0.020 mol of HCl is added?
  75. Math1

    17.8
  76. alegebra

    A study recently confirmed that of every 100100 citizens of a certain? state, 6060 are considered overweight. There were 299299 million citizens of this state in 2001. How many would be considered? overweight? nothing million citizens would be considered overweight.
  77. Physics

    How much does it cost to operate a 23-W porch light for 24 h if electric energy costs 8¢/kWh?
  78. math

    A college student takes a standardized test and scores a 163. If the mean is 155 and the standard deviation is 7, what is the student’s percentile rank? (Assume a normal distribution.)
  79. Physics

    1. Calculate the kinetic energy of a 5.2kg object moving at 2.4 m/s 7. Calculate the potential energy of a 5.2kg object positioned 5.8m above the ground 21. Calculate the speed of a 5.2 kg object that possesses 26.1 J of kinetic energy.
  80. Grade 6: money and measures

    12
  81. chemistry

    a student performs the lab on an unknown metal and obtain the following data
  82. Physics

    a=47.6-0/17.6 a=2.705 seconds
  83. Physics

    The velocity graph of a particle moving along the x-axis is shown. The particle has zero velocity at t=0.00s and reaches a maximum velocity, vmax, after a total elapsed time, t total. If the initial position of the particle is x0 =6.22m, the maximum velocity of the particle is...
  84. Physics

    t= sqrt (8.306) = 2.88s d= 234m/s * 2.88s = 674.40m Thanks!
  85. Physics

    A cannon ball is fired horizontally from a cannon that is 40.7m above the ground. The initial velocity of the cannon ball is 234m/s. How much time does the cannon ball spend in the air?
  86. Math

    cos(x)/(1-tan(x)) + (sin (x))* cos(x))/ sin (x)-cos(x))
  87. chemistry

    the value would be too high because the density should have had a denominator that was a bit lower and a numerator of grams
  88. chemistry

    a pipet can be calibrated. we expected the volume to be 25.00ml, but the actual volume was significantly less. if you had measured the density of an unknown with this pipet and assumed that v=25.00ml, your result would not be correct. would it be too high or too low? Explain
  89. Science

    The surface r of a liquid depends on the density p acceleration due to gravity g nd height h use the method of dimension to derive the actual relationship between this quantities. An object is tie to the end of a string move in a circle the force exerted by the string depend ...
  90. chemistry

    Express the composition of each of the following compounds as the mass percents of its elements...? 59) Express the composition of each of the following compounds as the mass percents of its elements. a) formaldehyde, CH2O b) glucose, C6H12O6 c) acetic acid, HC2H3O2
  91. Math

    How do you find P if A=1/2a+P, and you have both the values of a and A?
  92. Writing Skills

    Just took the test and it actually was C. reference book
  93. Writing Skills

    B. Medicine, Thank you for the help
  94. Writing Skills

    The call number of the book that you're looking for is R865.2. What do you know about the book based on this information? A. It's a book of or about Roman literature. B. It's a book about medicine. C. It's a reference book. D. It's a book that can be gained...
  95. History

    If The British Government Could Do It Over Again The British governing policy of salutary neglect gave the young colonial governments a chance to "experiment" with their own self-governance. Gaining confidence in their abilities to rule the people without the British...
  96. Math

    Susie spent 4 1/4 hours on Monday and 3 5/8 hours on Tuesday working on a history project. About how long did she spend working on the project?
  97. Civic education

    alienable fundamental rights to whichie inherently entitled sumply because he or she is a human being.
  98. algebra

    I have to write and solve as literal equation.
  99. algebra

    I want to visit a friend that lives 200 miles away. Gas is $4 a gallon. My car gets 50 miles every 2 gallons of gas. How can I solve this using an literal equation?
  100. Maths

    A right circular cone of base radius 5 cm and depth 20 cm is held with its vertex downwards. If water is leaking through a small hole in the vertex at the rate of 8 cm^3/s, find the rate of change of the water level in the cone when the radius of the water surface is 4cm, ...
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