Posts by Jake

Total # Posts: 2,323

  1. Math-Population Word Problem

    Ohh my gosh, thank you. I was just confused about "a" but the extra information cant hurt. Thank you so much.
  2. Math-Population Word Problem

    thank you very much, it all makes sense now except for a. could you explain how you get that number. I plugged it into a calculator and it is correct but i just don't understand how it works.
  3. Math-Population Word Problem

    The population of rabbits in a national forest is modeled by the formula P=8,600+650 ln(t+1) where "t" is the number of years from the present. a)How many rabbits are now in the forest b)Estimate when it will take for the number of rabbits to reach 12,000? c)Estimate...
  4. Writing

    I rock
  5. English

    In which sentence is the underlined word a past participle? Melted rock can explode or flow from different types of volcanoes. Having been warned of a possible eruption, the people left their town at the base of the volcano. Flowing lava from a volcano is an amazing sight to ...
  6. physical science

    A 150-L water heater is rated at 8 kW .If 20 percent of its heat escapes, how long does the heater take to raise the temperature of 150 L of water from 10C to 60C?
  7. Chem

    When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?
  8. Social Studies

    The second answer is wrong it should be D
  9. Calculus

    An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
  10. Calculus

    An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
  11. Calculus

    An ocean oil well is leaking oil into the ocean at a rate of 1 m3/hr resulting in an oil slick in the form of a circular disk (like a quarter or dime). If the slick remains in the shape of a disk with a constant thickness of 1/100 m as the disk expands, determine the rate at ...
  12. Geometry

    base of a ||gm is base x height base --- x height --- x+5 s(x+5) = 204 x^2 + 5x - 204 = 0 (x-12)(x+17) = 0 x = 12 or a negative base is 12, height is 17
  13. physics

  14. math

    what is 21/2 x 1/2
  15. physical

    A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
  16. physical

    When 1 g of gasoline is burned in an engine, about 48 kJ of heat is produced. How much mass is lost in the process? Do you think this mass change could directly measured
  17. Science

    If there was zero change in Earth’s eccentricity, how might that affect the possibility of an ice age?
  18. physics

    . A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...
  19. physics

    I used the equations of motion for constant acceleration (The object is assumed to fall with the acceleration due to gravity which I took to be 10 m/s^2) Equations of motion: V^2=U^2 + 2*a*s V=U+at Note: when objects rebounds, acceleration = - 10m/s^2 since the latter is a ...
  20. physics

    I worked it out and got 4.8N
  21. science

    The acceleration of gravity on the surface of Venus is 8.9m/s^2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?
  22. science

    A force of 20 N gives an object an acceleration of 5m/s^2. (a) What force would be needed to give the same object an acceleration of 1m/s^2? (b) What force be needed to give it an acceleration of 10m/s^2?
  23. math

    0.5, 3/5, 1 3/4, 0.9 in order from least to greatest
  24. chemistry

    How do you find q in q=mC delta t without the mass
  25. trigometry

    1. A 16-foot ladder on ground level is leaning against a house. If the base of the ladder is placed 5.0 feet from the house, what is the angle formed at the top of the ladder? A. 24° B. 18° C. 72° D. 20° please help I don't know how to do this
  26. Calculus

    calculate the derivative (2,5) (2.1,5.3) h'(2) if h(x)=(f(x))^3 k'(2) if k(x)=f(x))^-1 g'(5) if g(x)=f^-1(x)
  27. Physics 11

  28. Physics 11

  29. Physics

    You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 21.0%, you are running at the same speed she is. If your mass is 77.0 kg, what is her mass?
  30. calc

    agree thank you steve
  31. calc

    find the derivatives of the given functions. g(t)=sqrt t(1+t)/t^2
  32. 7th grade math Ms. Sue please

    1)D 2)C 3)B 4)C 5)B
  33. Math PLEASE HELP FAST!!!!

  34. history

    ms.sue,thank you for the answer, but i have to discribe the things Juan Ponce De Leon discovered in his journey to the new land! My homework question is, discribe the things he discovered in his journey to the new world like plants,animals,people and land???
  35. history

    what did Juan Ponce De Leon discover in his journey to the new world: plants,animals,people,land?
  36. math

    If a hiker walks trail B (1 mile in length) at 6 mph and trail C (3 mils in length) at 2 mph, what is the hiker's overall average speed, in mph, for hiking on the two trails?
  37. Math on time

  38. Math on time

    Trying to understand how to solve this? Paige spends 1 hour on her homework. She spends equal amounts of time on all subjects. If Paige spends ½ hour on Spanish, how many subjects does she study?
  39. Math

    The area of certain rectangle is 288 yd. the perimeter is 68 yd. if you double the length and width, what will be the area and perimeter of the new rectangle.
  40. Math

    A plane leaves Boston at 10 am (Boston time) and flies non-stop to LA, 2700 miles away, at 580 miles per hour (mph). On the same route, a second plane is flying non-stop from LA to Boston at 620 mph. If the second plane lease LA at 10 am (LA time), how many miles from LA will ...
  41. English/Essay

    Could someone tell me if I have done my essay the right way? Please its due Monday?? "The internet is a much easier resource for students than a library” The first reason the internet is a much easier resource for students than a library, you can Find specific ...
  42. 9th grade algebra

  43. math

    (+6) + (-11) + (+5) + (-7)
  44. Pie Charts

    On the pie chart it reads: 1999 U.S. Electricity Generation by Fuel Type (Billion Kilowat hours) Coal: 1882, 51% Natural Gas:565 15.3% Petroleum: 119, 3.2% Nuclear: 728, 19.7% Hydroelectric: 307, 8.3% Other Renewables: 89, 2.5% What was the total amount of electricity ...
  45. 8th grade math

    Jerome, Kevin, & Seth shared a submarine sandwich. Jerome ate 1/2 of the sandwich, Kevin ate 1/3 of the sandwich and Seth ate the rest. What is the ration of Jerome's share to Kevin's share to Seth's share? 1. 2:3:6 2. 2:6:3 3.3:1:2 4.3:2:1 5.6:3:2 please help!
  46. Social Studies

    I don't have an atlas and I need help finding the location. I need the nearest city and the country that it's in. Thank you. 1. 31° s, 64° w 2. 13° s,71° w 3. 16° s, 68° w
  47. algebra

    matching graphs inequailty
  48. Physics

    16) A curve of radius 120 m is banked at an angle of 18°. At what speed can it be negotiated under icy conditions where friction is negligible? 2 m/s 12 m /s 20 m /s 5 m/s 11 m/s
  49. algebra2

    how do you find out the vertex when graphing inequalities of quadratics in equations like this y<x^2-16 it factors out to like x+4 x-4 and I know that i can use that to find the x intercepts but the way to find the vertex i don't understand
  50. Math

    What multiplication fact can be found using the arrays of 2x5 and 5x9
  51. english

    another word for nothing more than? For example, if you say that advice is nothing more than
  52. algebra 2

    sorry i needed to add more info for this to make sense the problem is asking to write the quadratic equation that has those roots. so in this case i'd use those roots to find -b/a but i don't get how that correlates to -b/a?
  53. algebra 2

    how is 7-3i + 7+3i = 14/1 we're doing sum and product of roots, and i don't get how this is equal to 14
  54. Algebra

    Each team in a soccer leaguehas played every other team 5 times. Current league standings are: Team A 37 Points Team B 34 Points Team C 28 Points Team D 26 Points Team E 20 Points If a team receives 3 points for a win, 1 point for a tie, and 0 points for a loss, how many of ...
  55. Chemistry

    What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer in 3 sigfigs?
  56. math

  57. math

  58. Physics

    A uniform rod of length L and mass m initially at rest is struck by a horizontal force F0 a distance x below the pivot O. The rod is free to rotate about its pivot without friction. If F0 is the average value of the force and Δt is its duration. (a) What is the speed of ...
  59. Science

    How much force was used to move a box 42m if 13,734 J of work was done on it?
  60. physics

    What is the angular momentum of a figure skater spinning at 4.4 with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6 , a radius of 15 , and a mass of 53 ?
  61. Physics

    A class of 11 students taking an exam has a power output per student of 122 W. Assume that the initial temperature of the room is 18.8oC and that its dimensions are 6.40 m by 14.5 m by 3.50 m. What is the temperature (in oC, do not enter units) of the room at the end of 54.0 ...
  62. Physics!

    If a water heater has a capacity of 54.4 gallons and a 4910 W heating element, how much time is required to raise the temperature of the water from 19.8oC to 60.0oC? Assume that the heater is well insulated and no water is withdrawn from the tank during this time.
  63. Physics

    Sorry, rotational inertia I = 6.4 * 10^-3 kg*m^2. I really am stuck on this, can't figure out how to use angular momentum/torque relations to connect the dots and be able to solve for what they're asking ;\.
  64. Physics

    A gyroscope with rotational inertia 6.4 10-3 kg·m2 is precessing in a horizontal plane at 0.46 rad/s under the influence of a 0.31 N·m torque caused by a force pointing vertically downward. How fast is the gyroscope spinning on its axis?
  65. chemistry

    I don't think this makes sense... there are not any oxygens on the left so Im pretty sure it doesn't work, unless you just add oxygen to the left im not sure you can do that though... If so it would look like this KNO3 --> KNO3 + O ^add O to this side as well Once ...
  66. arrays and expanded algorithm

  67. chemistry

    Fe(s) +Pb^2 (aq)---->Fe ^2+ (aq) +Pb(s) which reactant has been oxidized
  68. English 8R - Homework Check (plzzzz read)

    Very obvious you have copied... we have all done it before... just put it in your own words (especially in the beginning)
  69. Science

    wuz up
  70. Calculus

    A rectangular cardboard poser is to have 150 sq ft in for printed matter. It is to have a 3inch margin at the top and bottom and a 2inch margin at the right and left. Find the dimensions of the poser so that the amount of cardboard used is minimized.
  71. math

    explain why the equation x^(5)-3x+1=0 must have a solution with 0 < x <1
  72. Chemistry

    Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green solution 25.0mL 1.60M ...
  73. Physics

    because b and m_o are constants and i believe that e^-kt is taken as a constand as well. Leaving dx to be integrated between 0 and x(t). am i correct? more opinions welcomed please
  74. Physics

    I think that the answer comes out to be v(t)=(uk-g)t - b*m_o*(e^-kt)*x(t)
  75. Physics

    A rocket ascends from rest in a uniform gravitational field by ejecting exhaust with constant speed u. Assume that the rate at which mass is expelled is given by dm/dt=mk, where m is the instantaneous mass of the rocket and k is a cosntant, and that the rocket is retarded by ...
  76. BC Calculus

    Use linear approximation to estimate sec^2(pi/4 + .025) Need help quickly please!! :)
  77. Physics

  78. math

    Samuel solved the equation h – 234 = 1,192 and found the solution to be h = 958. Is he correct? He is right I think because when you subtract 234 from 1192 it equals 958 right?
  79. Calculus

    simplify log2(4x^2 2^x)
  80. math

    In an election, Kate lost to Lee by 32 votes. Because the vote was so close, they decided to have a re-vote. All of Kate's supporters voted fro her again, but some of Lee's supporters switched their votes to vote for Kate. Kate won by the revote by 6 votes. How may of ...
  81. math

    What is the distance between the rectangular coordinates (1,16) and (10,4)?
  82. goverment

    in the recent presidential election, romney's comment "binders full of woman" really offended people. why were people so offended, i don't really understand, did he mean something bad?
  83. calculus

    Write h(x) = 6x^4 - 2x^2 + 1 as a composition of two functions f and g
  84. Literature

    13. Scan this line from Cowley's poem: "its hills bent low within my reach." How many feet does this line contain? A. 5 B. 7 C. 6 [D. 4]
  85. Literature

    c is the correct answer finished the tesr
  86. Literature

    5. As we find with most songs, in poetry [A. there's no specific point of view.] B. each couplet must rhyme. C. sound and content have equal weight. D. meanings are hidden in imprecise words.
  87. Literature

    2. In The Call of the Wild, the bond between Buck and Thornton is best explained by observing that A. dog and man were like mirror opposites. [B. dog and man were both in touch with their primordial nature.] C. Buck had helped Thornton pay off his debts. D. Buck found Thornton...
  88. chemistry

    what fraction of an original sample of a radioactive isotope remains after three half-lives have passed? 1/8?
  89. Statistics

    A 50-question true-false exam is given. Each correct answer is worth 10 points. Consider an unprepared student who randomly guesses on each question. In your solution, please be sure to show the exact steps you used to arrive at the answers. A. If 5 points are deducted for ...
  90. Calculus

    thank you
  91. Calculus

    Find the derivatives of the function f(y)= sinh(sinh(7y).
  92. chemistry

  93. math

    A candle is 17 in. tall after burning for 3 hours. After 5 hours, it is 15 in. tall. Write a linear equation to model the relationship between height h of the candle and time t. Predict how tall the candle will be after burning 8 hours.
  94. Physics

  95. world history

    its A
  96. world history

    4. Which pope wanted Christians to unite to redress what he saw as an imbalance of power between Christianity and Islam? A. Pope Urban II B. Pope Clement VI [C. Pope Benedict] D. Pope John Paul
  97. Percentage

  98. world history

  99. world history

    13. _______ was the first thinker to postulate that numbers are real, not abstractions. A. Hui Shih [B. Pythagoras] C. Parmenides D. Aristotle
  100. world history

    its d
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