Posts by Sally

Total # Posts: 1,311

  1. Calculus Related Rates

    Two people leave from the same spot and walk at 4ft/sec going north and 5ft/sec going northwest. At 30 seconds, how fast is the distance between them changing?
  2. Calculus Related Rates

    Mulch is dumped into a pile with height always 1/3 the diameter at a rate of 30 ft^3/hr. How fast is the height increasing when it is 6 ft tall?
  3. math

    a private jet flies the same distance in 6 hours that a commercial jet flies in 4 hours.if the speed of the commercial jet was 143 mph less than 2 times the speed of the private jet, find the speed of each jet
  4. algebra

    BASEBALL The equation h = –0.005x2 + x + 3 describes the path of a baseball hit into the outfield, where h is the height and x is the horizontal distance the ball travels. a. What is the equation of the axis of symmetry? b. What is the maximum height reached by the ...
  5. Adelphi

    Which is a guideline for doctors pursuing research with human subjects?
  6. Math

    it's b i promise! trust me.
  7. Physical Science

    Which SI unit is used to measure length? A. meters B. newtons C. grams D. liters
  8. algebra

    x^2 + x - 12 What is the minimum value of y?
  9. algebra

    Determine whether each expression is a polynomial. If it is a polynomial, find the degree and determine whether it is a monomial, binomial, or trinomial. 1. 7a^2b + 3b^2 – a^2b 2. 6g^2h^3k
  10. physics

    In a thundercloud there may be an electric charge of 46 C near the top of the cloud and −46 C near the bottom of the cloud. If these charges are separated by about 6 km, what is the magnitude of the electric force between these two sets of charges? The value of the ...
  11. Calculus

    Please help me find the limit: lim x--> 2 ((1/3)-1/sqrt(x))/)x-9)
  12. math

    what is a prime number?
  13. Math

    2 is not D u big liars i got a 3/4
  14. Art PlZ HELP MEE!!!

    Does anyone know the answers to the quiz? Mine are; D C A C C D B D D A Please tell me if I am right or wrong.
  15. maths

    but the questions says twice. you have just calculated once.
  16. Algebra 1

    A should be correct.
  17. Math???Plase Help

  18. Math

    A group of 21 people have enough food for 24 days. If 15 additional people join them, they would have enough food for only___days. (Assume everyone eats the same amount of food each day)
  19. Math

    During its first week of business, a market sold a total of 108 apples and oranges. The second week, five times the number of apples and three times the number of oranges were sold. A total of 452 apples and oranges were sold during the second week. Determine how many apples ...
  20. Algebra

    gilbert plans to invest 9% and 11% annually. if he want to earn$1200 annually how much should he invest in each bond.
  21. Statistics

    A machine fills 12 ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be less than or equal to 0.02 ounce. A sample of 8 bottles is selected, and the number of ounces of soda in each bottle is given. At alpha +0.05, can you...
  22. Algebra 1

    no i think the answer is b
  23. Science...anyone?

    Thanks, you saved my Answerer. P.S.: Are you a wiz kid?
  24. Science...anyone?

    1. Which of these sources of energy is NOT renewable? a.) wind b.) solar power c.) hydroelectric power d.) natural gas 2. Air can be polluted by _____. a.) tiny particles of soot b.) carbon monoxide c.) sulfuric acid d.) all of the above 3. Which of the following can cause ...
  25. Finance

    Homework Help: Finance Posted by Sally on Monday, November 23, 2015 at 8:02pm. The answer given by Finance - Anonymous , Monday, November 23, 2015 at 8:12pm Add the tax to the "before tax" to get the answer was not helpful. I am hoping someone can give me a guided ...
  26. Finance

    Anonymous, I still don't understand.
  27. Finance

    Jiminy's Cricket Farm issued a 30-year, 7.2 percent semiannual bond 6 years ago. The bond currently sells for 87.5 percent of its face value. The book value of this debt issue is $103 million. In addition, the company has a second debt issue, a zero coupon bond with 9 ...
  28. Geometry

    The coordinates of a triangle are X(0,0, Y(2h,2h), and Z(4h,0). Is the triangle a right triangle? Show work to support your answer. I don't really know how to solve this, or show m work.
  29. c++ programming

    I need some help with my homework please Write a C++ program to prompts the user to enter the first character of shape name (Cycle, Rectangle, or Triangle). Then calculate the area of that shape. „h If the user enters another character the program should print: You should...
  30. math

  31. math 6

    Javier solves three math problems in five minutes. He has 20 math skill-work questions for homework, and he wants to complete them before talking with friends. How many minutes will javier take to complete 20 math skill work questions
  32. math

    GEOMETRY The formula for the perimeter of a rectangle is P = 2 + 2w, where is the length and w is the width. A rectangle has a perimeter of 24 inches. Find its dimensions if its length is 3 inches greater than its width.
  33. help please english

    my score was 12/12!!!!
  34. help please english

    1.B 2.B 3.D 4.B 5.A 6.A yourself 8.B 9.D 10.D 11.A 12.C 13.A you're welcome p.s if i'm wrong, i'll post the ones i got wrong but for now these are my answers!!!
  35. math

    Dracula, Frankenstein, Mummy, Gilda and Zelda are all having a Halloween party. Each of them has given an invitation to all of the others. How many invitations have been given out?
  36. Dallas can

  37. physics

    Power applied to a particle varies with time as P=(3t^2-2t+1)W. Find the change in kinetic energy between t=1s and 4s.
  38. math

    8 - (-n) = 1
  39. science

    is tap water a pure substance..?
  40. science

    is a polyatomic considered a compound?
  41. Language Arts

  42. math

    Aren't we suppose to get rid of the -2 to get x.. by dividing on both sides?
  43. math

    3x-2y=8 5x-2y=9 using elimination method.. please help.
  44. physics1

    Vector A has a magnitude of 6 and is at an angle of 32.4 degrees measured counter-clockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 113.8 degrees measured counter-clockwise from the x axis. Vector C has a magnitude of 17 and is at an angle of 180...
  45. physics

    Copy of Vector A has a magnitude of 5 and is at an angle of 29.7 degrees measured counter-clockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 115.4 degrees measured counter-clockwise from the x axis. Vector C has a magnitude of 18 and is at an angle...
  46. Calculus 3! ASAP please

    Also, I do not understand how to add magnitudes. Please help. Let u and w be vectors in R3 such that ||u||=3 and ||w||=2 and the angle between the vectors is pi/2; what is the value of ||3u-4w||? - answer is sqrt(145)
  47. Calculus 3! ASAP please

    1.A given line is described by the system of equations x=2t+7; y=-3t+4; z=5-t; find the equation of a line parallel to the given line and which contains the point (1,1,0). 2.Let a=<0,6,2> and b=<0,2,4>, then the component of a parallel to b is given by? - the ...
  48. Algebra 2

    Did I solve this complex rational expression correctly? (2/3)-(x)/(2/3)+(x) 2/3-x = 2/3-x(3)/1(3)= (-x)+(2/3) (2/3)+ (x)= 2/3 + x(3)/1(3)= (x)+(2/3) (-x)+(2/3)/(x)+(2/3) = -(3x-2)/(3x-2)
  49. algebra

    Of Maria's total salary, 1/4th goes to taxes and 2/3rds of what remains goes to food, rent, and bills. If she is left with $500 each month, what is her total monthly salary?
  50. English

    how do you write an evaluation for a narrative about Cry Freedom explaining techniques you have used in your narrative(eg. simile, metaphor, structure)???
  51. Language Arts

    boo is correct!
  52. science (cladogram)

    james you're in my class @Mr. McAtee i'm telling mrs.christ about your cheating habits.
  53. Math Help

    thanks damon
  54. Statistics

    The average mark on an entrance exam was 70%, with a standard deviation of 9.6. In order to be accepted you must get 60% or better. If 800 students wrote the exam how many were accepted?
  55. periodic functions

    At time 4 minutes your submarine is at its deepest, y= -1000m. At time 9 minutes you are at your shallowest, y= -200. Sketch the graph. Write the equation. Your sub is designed to cruise below y= -300 meters. At time zero was your submarine at its cruising depth? Between what ...
  56. math

    Ava made 100 paper cranes, and Brittany made 3/4 of the number of paper cranes Ava made. Ava gave 9/20 of her paper cranes to Brittany. Then, Brittany gave 1/4 of her paper cranes to Ava. How many more paper cranes did Brittany have than Ava in the end?
  57. Language Arts

    thanks to the people who helped but for the people who were cussing u people need to stop. just imagine u r at real public school, standing in front of a teacher, u would not cuss unless u were very stupid. oh and the answers are: 1-D 2-c 3-a 4-a 100% thanks all of u
  58. Math!!! Please help!!!

    Find the coefficient of x^7 for (x-3)^11 Use the binomial theorem to expand (2y-3x)^5 Prove that (n over r)= (n over n-r) for all integers where n is greater than or equal to r and r is greater than or equal to zero Prove that (n over n-2) + ( n+1 over n-1)= n^2 for all ...
  59. Mathematics

    Find the coefficient of x^7 for (x-3)^11 Use the binomial theorem to expand (2y-3x)^5 Prove that (n over r)= (n over n-r) for all integers where n is greater than or equal to r and r is greater than or equal to zero Prove that (n over n-2) + ( n+1 over n-1)= n^2 for all ...
  60. Trig

    Find sin(s+t) and (s-t) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are in quadrant 1. =Sin(s)cos(t) + Cos(s)Sin(t) =Sin(1/5)Cos(3/5) + Cos(-1/5)Sin(3/5) = 0.389418 Sin(s-t) =sin(s)cos(t) - cos(s)sin(t) =sin(-3/5)cos(1/5) - cos(1/5)sin(3/5) =Sin-3/5 cos-3/5 = -0.46602 HELP ...
  61. MATH

    NOT INDEPENDENT A box contains four white, three red, and two black marbles. Three marbles are chosen at random. a. What is the probability that all three are the same color? b. What is the probability that all three are different colors?
  62. Math

    Solve this system that is represented by the following matrix. [1 -2 -2| -3 0 5 3| 13 0 0 1| 1] Write answer in (x, y, z)
  63. check my answers please

    Does anyone have these answers to this assignment?
  64. chemistry cp

    so it it letter c?
  65. chemistry cp

    The term formula mass is a general term that can be applied to both ionic compounds and molecular compounds because (a) ionic compounds exist as individual molecules (b) molecular formulas are always empirical formulas (c) not all formulas represent individual molecules (d) ...
  66. business math

    Anny invests $8,500, at 6% interest, compounded quarterly for 12 years?
  67. Math

    Juanita invests $3,500, at 8% interest, compounded annually for 4 years?
  68. math

    If Will gives Molly $9, he will have the same amount of money as her. If Molly gives Will $9, the ratio of the money she has to the money Will has will be 1 : 2. How much money does Will have in the beginning?
  69. Social Studies

    I believe burned is the correct answer?
  70. Chemistry

    What will happen to the number of moles of SO3 in equilibrium with SO2 and O2 in the following reaction in each of the following cases? 2 SO3(g) equilibrium reaction arrow 2 SO2(g) + O2(g) ΔH° = 197 kJ (a) Oxygen gas is removed. increase decrease stay the same (b) The...
  71. Science Help Please

    What does "do" for number 18 mean
  72. Child Development

    5+5=10 10+10=20 20+20=40 1+1=2 !!!!!!!!!!!!!!!!!:) :) :) :) :) :) :) :) :) :) :) :) :) !!!!!!!!!!!!!!!!
  73. 6th Grade Geometry

    are you sure that this is the answer?? I really need it
  74. math

    60 degrees I think
  75. statistics

  76. math

    Kim and Kent are on opposite sides of a canal, pulling a barge with tow ropes. Kim exerts a force of 50N at 20 degrees to the canal and Kent pulls at an angle of 15 degrees with just enough force so that the resultant force vector is directly along the canal. Find the number ...
  77. math

    (1,1) and (13,3) (0,4) and (14,0) What are the coordinates for the intersection of the two lines?
  78. math

    hakiim invested 15000 he put part of it in a term deposit that paid 4% per annum and the remainder in a treasury bill that paing 5% per annum after one year the total interest was 690 how much did hakiim invest at each rate
  79. Physics

    sorry as in P1=666400 Pa not 666400pa*6
  80. Physics

    Hi, just need a little help with this physics question please. A cylindrical tank of water is located 68m deep in water. An air lock at the bottome of the tank allows access. The sailor must wait while the air pressure in the lock is increased until it equals the water ...
  81. physics

    The water storage tank has a diameter of 0.5m and contains 150L of water. You find a small hole rusted in the base, with a diameter of 10mm. what is the velocity of the water flowing out of the hole? So, i feel like I need to somehow use both Bernoullis equation and continuity...
  82. physics

    The equation given is 2SO2(g)+O2(g)->2SO3(g), and if 224L/h of O2 (at standard temp and pressure) is consumed by the reaction, how much power is produced? I can't go further than P=Work/Time and Work=P times change in V I've tried 224x2-224x3/60^2 but that's not...
  83. physics

    Three charged marbles are glued to a nonconducting surface and are placed in the diagram as shown. The charges of each marble are q1 = 5.75 µC, q2 = 1.48 µC, and q3 = −2.47 µC. Marble q1 is a distance r1 = 3.00 cm to the left of the marble q2, while ...
  84. math/algebra

    Determine three consecutive odd integers such that three times the middle integer is seven more than the sum of the first and third integers.
  85. science

    idk what's the real answer
  86. math

    Below are two pairs of points. A line goes through each pair of points. What are the coordinates for the intersection of the two lines? Show your work. Pair 1 (1,1) and (7,7) Pair 2 (0,8) and (8,0)
  87. Math

    Thank you!
  88. Math

    Mistyped it should say "10 spoke english & french" not "10 spoke english & frnech"
  89. Math

    In a class of students, 80 spoke English, 110 spoke spanish, 100 spoke french, 50 spoke english & spanish, 30 spoke english & french, 20 spoke french & spanish, 10 spoke english & frnech, but no spanish. How many spoke spanish & french, but not english? The answer is 0. I was ...
  90. statistics

    A professor gave an aptitude test to a class of psychology students and computed the mean, median, and mode for the test scores. Which of the following statements cannot be an accurate description of the scores? -All of the above statements are false. -The majority of the ...
  91. Physics

    An object fired at an angle of 31.9° above the horizontal takes 2.55 s to travel the last 15.5 m of its vertical distance and the last 10.5 m of its horizontal distance. With what speed was the object launched? (Note: This problem does not stipulate that the initial and ...
  92. Physics

    You are practicing throwing darts in your dorm. You stand 3.21 m from the wall on which the board hangs. The dart leaves your hand with a horizontal velocity at a point 1.94 m above the ground. The dart strikes the board at a point 1.73 m from the ground. a) Calculate the time...
  93. Physics

    How much work is it to push a box (mass 120 kg) up an incline (angle 16 degrees with the horizontal) that is 9.6 meters long, if the coefficient of kinetic friction between the box and the incline is 0.5?
  94. english

  95. stats

    A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the two balls will be of different colors
  96. P.E

    LizLiz Is Correct! Yay! 100% For Me!
  97. Algebra ASAP thx

  98. math

  99. chemistry

    How much energy (in kilojoules) is needed to heat 4.00g of ice from -11.0∘C to 21.5∘C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K⋅mol) for ice and 75.3 J/(K⋅mol) for liquid water.
  100. Physics/Calc

    A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
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