Posts by isaac

Total # Posts: 204

  1. physics

    the length of copper and iron wire is 500m at 0°c. determine the difference in their length at 30°c
  2. geography

    uoluo
  3. geometry

    -2
  4. vector and geometry

    Given that;r-1=6i-8j=2k, r2=4i=5j=7k, r3=2i=j=6k. Find r1,r2.
  5. Pyhsical Science

    Actually she was being pretentious saying "It's actually D" Giving the guy the wrong answer. I Thank the anonymous user for sharing the facts so i get the right answer.
  6. Calculus

    How can I prove this series alternating series converges(this is the answer)? (-1)^2*(2/3)^n I tried it this way: an = (2/3)^n, then i just broke it down. 2^n/(3^n) and i took the ratio of it and got 2/3 which does not equal to one which would mean the series diverges.. but ...
  7. math

    tap a was turned on to till a rectangular tank of 50cm by 40cm by 28cm with water at a rate of 6 liters per minute. after 2 minutes, tap b was turned on to drain water from the tank at a rate of 2 liters per minutes. 6 minutes after tap b was turned on, both taps were tuned ...
  8. math

    tap a was turned on to fill a rectangular tank of 50cm by 40cm by 28cm with water at a rate of 6 liters per minute. after 2 minutes, tap b was turned on to drain water from the tank at a rate of 2 liters per minutes. 6 minutes after tap b was turned on, both taps were tuned ...
  9. Calculus

    The question is find the area of the reagion that is bounded by the curve y=arctan x, x=0, x=1, and the x-axis. So I've drawn the enclosed region. To find the area would I use the Disc/shell method? If so the formula that I came up with looks like this: If area = pi(r)^2 ...
  10. Calculus

    = 1/(3x+5)*d/dx (3x+5) =3/(3x+5)
  11. Calculus

    There is this improper integral problem I've been given. I've completed most of it but still don't understand what I'd get, I don't quite get what it means to go from 'e' to 'infity'. What would I get? -ln(x)+1/x from 'e' to '...
  12. physics

    a particle a of mass 2kg and particle b of mass 1kg are connected by alight elastic string c, and initially held at rest 0.9m apart on a smooth horizontal table with the string in tension. they are then simultaneously released . the string releases 12j of energy as it ...
  13. physics

    s = vt s=3×15 s=45m
  14. inorganic chemistry

    silt is an example of ........ Hydride
  15. Math

    Here is the work 10/3x + 4/3 = (7+x)/2x Multiply both sides by 6x: 2*10 + 8x = 3(7+x) 20 + 8x = 21+3x 8x-3x = 21-20 = 1 5x = 1 X = 1/5.
  16. Math

    It's C
  17. Arithmetic

    three numbers in an arithmetic sequence sum up to six. if you add 1 to the first number, 2 to the second number, and 5 to the third number, what are the orginal three numbers?
  18. English

    No its C. I go to Connections academy and just did that test!
  19. Math

    When M+N=8 and 2R+N=8, what is the value of R? A.16 B.4 C.-4 D.-8 E. It cannot be determined from the information given.
  20. math

    3 not on the beach
  21. math

    At a lake, 40 people are water skiing or on the beach. Nine of the 12 people on the beach decide to swim. How many people are not on the beach?
  22. Ratio

    Ratio in simplest form
  23. Chem 1

    How can you prepare 2M of 200 ml HNO3 solution from 63% stock solution of HNO3 which has a density of 1.4 g/ml?
  24. Chemistry

    Molecules of H2: 3 molecules. Nitrogen atoms present: 3 atoms Moles of NH3 formed: 2 moles
  25. AP Physics

    v=vo +at vo=v v-at vo=9.81m/s - (6.24m/s^2(.3s)) vo=9.81m/s - 1.872m/s vo= 7.44m/s
  26. Please

    The War of the Roses placed the __________ on the English throne. Lancasterists Tudors Sheffields Bosworths Normans
  27. History

    well he made plays on this topic so True?
  28. Math

    The temperature at the top of Mt. Washington one morning was -10 degrees Fahrenheit. With the conversion formula C=5/9(F-32). What was the temperature in degrees Celsius (to the nearest degree)?
  29. Math

    A=p+prt. Solve for p and t
  30. Math

    Solve for y and x. x(y+2)=z Please Explain for me
  31. equations

    decide whether each equation is true or false.For each true equation,write the number property shown by the equation.0+6=6
  32. Social Studies

    its A .
  33. Math ( Palette of Problem)s)

    At a lake 40 people are water skiing or on the beach. Nine of the 12 people on the beach decide to swim. How many people are not on the beach? Is it 3?
  34. Math ( Palette of Problem)s)

    At a lake 40 people are water skiing or on the beach. Nine of the 12 people on the beach decide to swim. How many people are not on the beach?
  35. Math ( Palette of Problem)s)

    answer:3
  36. science

    A relative density bottle has a mass of 40g when empty, 90g when filled with water and 80g when filled with oil. Calculate the relative density of the oil.
  37. mathematics

    A sales manbought some plates at$50.00 each.if he sold all of them for$600.00 and made a profit of 20% on the transaction,how many plates did he buy?
  38. mathematics

    A sales manbought some plates at$50.00 each.if he sold all of them for$600.00 and made a profit of 20% on the transaction,how many plates did he buy?
  39. mathematics

    A sales manbought some plates at$50.00 each.if he sold all of them for$600.00 and made a profit of 20% on the transaction,how many plates did he buy
  40. Life orientation

    HUMAN PROBLEM THAT AFFECT THE COMMUNITY
  41. 6th grade credits

    my mom keeps sayin i need like 100 credits to pass 6th grade,is this true?
  42. accounting

    Contribution margin = sales revenue - variable cost... So (20000*10) 200000-(20000*4)80000= 120000
  43. physics

    so n = 240 and i is 0,61?? and would the radius be 0.018/2??
  44. Math

    The inside has to equal 360 since its a 4 sided figure you know 2 sides which are 90 and the third side is 52 so 360= 52 + 90 + 90 + x solve for x 360 - 90 - 90 - 52 = x x=128
  45. math

    multiply both sides by 5 to get rid of the denominator and you get w(5)/5 = 6( 5) the 5's cancel out on the left side and you get left with w= 30 ** always remember - whatever you do to the left side you must do to the right* ( in this case we multiplied left side by 5 so ...
  46. Physics Help!!!

    A pitcher throws a 0.111-kg baseball, and it approaches the bat at a speed of 37.4 m/s. The bat does 78.6 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 30.8 m above the point of impact.
  47. math

    Ok thanks
  48. math

    Th'at didn't really help, heres the choices What is the surface area of a circle that has a diameter of 14 inches? A. 49.86 in 2 B. 153.86 in 2 C. 196.86 in 2 D. 616.86 in 2
  49. math

    What is the surface area of a circle that has a diameter of 14 inches?
  50. math

    What is the surface area of a circle that has a diameter of 14 inches?
  51. math

    Thanks
  52. math

    The surface area of any shape is expressed in:
  53. English

    The correct answer is Tree. The second answer could be "island" because it is filled with life, but a tree closely resembles one's life in which it grows.
  54. math

    10x+10y=40 dived by 10 x=4
  55. algebra

    A box of animal crackers measures 12 inches by 8 inches by 2 inches. What is the volume of the box
  56. Physics

    Over a time interval of 2.15 years, the velocity of a planet orbiting a distant star reverses direction, changing from +18.9 km/s to -17.3 km/s. Find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) during this interval. ...
  57. trig

    Find the exact solutions of the equation in the interval [0,2pi). sin(x/2)+cos(x)=0
  58. Calculus

    Hello, could someone please help me with this problem? I'm a little stuck with it. Thanks, Isaac A rectangle is to be inscribed with its base on the x-axis and its other two vertices above the x-axis on the parabola y=9-x^2 (a) find the dimensions of the rectangle of ...
  59. Home Insurance

    These r question tho n i need them lol ppl kum here for answers not watever diss is ^^
  60. Science

    In what way is erosion NOT like weathering? A)It is a force that changes the earth's surface B)It is a destructive force C)It changes rocks in some way D)It breaks down rocks I think D??
  61. liquid

    Go to google and search it you will find the answer
  62. social studies

    If you go to google it says Johann Gutenberg invented the printing press
  63. 2nd grade math

    2 Quarters equal 50 cents. 1 dime equals 10 cents 2 pennies equal 2... Add then all together 0.50 0.10 0.02 ____ 0. 62 Subtract 0.75 from 0.62 You get 13
  64. English

    twitch and rub its back, there are two predicates but question asks for one
  65. English

    What is the predicate in this sentence? The wiskers on my kitten twitch when I rub its back.
  66. Calculus

    A manufacturer constructs open boxes from sheets of cardboard that are 6 inches square by cutting small squares from the corners and folding up the sides. The Research and Development Department asks you to determine the size of the square that produces a box of greatest ...
  67. Calculus

    I just wasn't sure if the answer was simply a sketch, 6 - 2x each side with the cut-outs. Thanks!!
  68. Calculus

    A manufacturer constructs open boxes from sheets of cardboard that are 6 inches square by cutting small squares from the corners and folding up the sides. The Research and Development Department asks you to determine the size of the square that produces a box of greatest ...
  69. Physics

    A hang glider and its pilot have a total mass equal to 120 kg. While executing a 360 degree turn, the glider moves in a circle with an 8-m radius. The gliders mass is 10 m/s. a) what is the net force on the hang glider? b) What is the acceleration?
  70. Math

    A plane flies 150km due south and then 150km on a bearing of 45 degrees Celsius. With repeat to it initial position, find a. How far south the plane is b. how far east the plane is is c. It bearing d. How far way it is
  71. home ec

    what are both quick breads and yeast bread made from?
  72. Logic

    Using truth tree decomposition, determine the consistency of the set of propositions. Include line numbers and justifications, and recover the truth values if consistent. {A and B, ~B v C}
  73. Math

    Explain how you could estimate 22% of 78 to check if your answer is reasonable.
  74. 5 of 90 lotto equation formula

    please i need two sure for tuesday 29 march 2016
  75. math

    rectagle
  76. math

    same perimeter,diferent area 20 centimeters
  77. math

    There are 10 girls and 6 boys in a class. The teacher randomly draws one student's name and then draws another. What is the probability that the first name drawn will be a boy and the second will be a girl?
  78. science

    Please help what is the titration product of sodium hydrosulfite Na2S2O4 with sodium hypochlorite NaOCl?
  79. physic

    29
  80. Physics 112

    (delta) V=EPE/q 400V = EPE/q 400V*q = Ekfinal (in J) 400V*3.2x10^(-19) (the charge of two protons in helium nucleus) = Ekfinal (in J) = 1.28x10^(-16) J Convert this to eV (divide by the charge on 1 electron), and you get 800
  81. math

    Solu 1] the answer i add both syd and divide it by 2
  82. chemistry

    calculate the mass that if converted to energy would be equivalent to the energy released when 1g of CH4 is burned
  83. math brain teaser

    More to it than meets the eye
  84. economics

    what is taxation
  85. physics...

    Where did u get 5.84m
  86. Algebra 2

    Write this equation in standard form.. y=x2-6x+11 the x is squared
  87. Math

    A .
  88. Algabra

    Landscape designers often use coordinate geometry and algebra as they help their clients. In many regions, landscape design is a growing field. With the increasing popularity of do-it-yourself television shows, however, many homeowners are becoming amateur landscape artists. ...
  89. statistics

    Find the chance that if you toss a pair of dice, you get 6 for the sum.
  90. math

    $112 for 16 tickets, solve by determining the unit rate
  91. Linear Algebra

    V = Mnxn is a space vector formed by all the square matrices. Is W = {A in Mnxn : A^x = A} a subspace of V? Thanks
  92. math

    2a squared + 8a = -12
  93. 11th grade

    what major problem in america did the progressives ignore?
  94. Physics

    A 3 m, 250 N/m spring is at the bottom of a 10 m, 20 degree frictionless slope with a 30 m drop off the top of the incline. If a 10 kg wight is placed at the end of the spring when it is compressed 2 m, how fast will the block be traveling just before it hits the ground?
  95. algebra - Help!

    Thank you Unknown Guy, helped a lot!
  96. Chemistry

    Methyl Orange and litmus paper are mostly used
  97. Math

    What is 25 Divided by (-5)
  98. space

    does our solar system move in the milky way galaxy?
  99. Quick general Q:

    I don't think so
  100. Math

    thank you