Posts by Jack

Total # Posts: 2,046

  1. Maths

    Out of 25 students 3 were absent. What percent of the students Were absent Were present
  2. Physics

    1. A concave spherical mirror has a radius of curvature of 29.4 cm. The object distance is 5.7 cm . Find the magnitude of the image distance. Answer in units of cm. 2. Find the magnification.
  3. Language Arts

    lmao ms sue dude why you so rude
  4. Physics

    plane’s sound detector perceives the horn’s sound, the plane has traveled a distance equal to one-half its altitude above the ocean. If it takes the sound 1.658 s to reach the plane, determine the altitude of the plane. The speed of sound is 343 m/s. Answer in units ...
  5. Physics

    The distance between two successive crests of a certain transverse wave is 1.10 m. 10 crests pass a given point along the direction of travel every 11.1 s. Calculate the wave speed. Answer in units of m/s.
  6. science (physics)

    if a car is driving on a flat road at a constant speed. the driver drives off a cliff which is 180 m above a river it lands in the river 90 m away (measured horizontally), how long does it take for it to land
  7. Physics

    In Young's experiment a mixture of orange light (611 nm) and blue light (471 nm) shines on the double slit. The centers of the first-order bright blue fringes lie at the outer edges of a screen that is located 0.452 m away from the slits. ...
  8. Physics

    The pupil of an eagle’s eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. From a distance of 182 m, the eagle sees them as one unresolved object and dives toward them at a speed of 15 m/s. Assume that the eagle...
  9. Physics

    A 2.60-kg block is attached to a horizontal spring that has a spring constant of 214 N/m. At the instant when the displacement of the spring from its unstrained length is -0.115 m, what is the acceleration a of the object? In your answer, be sure to include the proper plus or ...
  10. science

    where does the Housatonic river in Connecticut originate and what is its base level?
  11. SOCIAL STUDIES

    Dejdudueieeiejejejejejdejdjdjdjfjfuffjchcjchcjcjccjjffjfjfjtfjiggjfjfjfififtitufu
  12. Math

    Eunice runs around an oval quarter-mile track, completing one lap every 2 minutes and 30 seconds. At this speed, how many seconds will it take him to run a mile?
  13. marketing

    Competitors that offer similar content to Motor Trend on Demand
  14. English

    I was wondering if anyone could give me an idea for this essay prompt? Describe a situation in which you have made a direct impact on the life of someone else. I just have no idea where to start or write about...
  15. Science

    1) What unit is speed measured in? 2) Why is it important to include units when describing motion? I've read this entire lesson. I just can't seem to find these answers.
  16. Im very confused and need help- Language Arts

    isabelle everthing is correct except for number 2 it is not b it is a
  17. chem

    How many moles of S are needed to combine with 0.208 mol Al to give Al2S3? break it down thanks
  18. Math

    all of you are wrong
  19. Math

    Do not listen to Rachel!! I got 9/19
  20. mathematics

    camine has 3 pieces of wire . the lenght 1st wire 5 meters the lenght of second wire is 3 meters less than tice the lenght of third wire . what is the peremeter of the triangle if the wires are connected end to end and the scond 9 meters long
  21. math

    Thanks Help is on the way with USA 100%
  22. Math

    How is log(base(x))x^m-1=1 My Answer Key says m-1+1=0 but I don't understand that solution
  23. Feedback Control

    The goal of this project is to model the longitudinal motion of a Segway and design a PID controller for it. The model must include the dynamics of the inverted pendulum on two wheels, as shown on Figure 1 (left), and the model of the DC motors (same as ) that actuate the ...
  24. Math

    solve the equation t/4=20
  25. Math

    it means that Elliot had double the amount of cards that Sam has. (Example Elliot had 12 cards and Sam had 24 cards)
  26. Math

    Elliot has twice as many trading cards as Sam. Elliot has 20 trading cards. write and equation and use it to determine the number of trading cards Sam has. a. s+2 = 20;18** b. s/2 = 20;40 c. 2s = 20;10 d. s-2=20;22
  27. Math

    Find the unit rate for a sponge cake that weighs 25 ounces and has 2750 calories. A. 0.009 calories per ounce B. 110 calories per ounce** C. 68,750 calories per ounce D. 115 calories per ounce
  28. math

    No that was not me. what is the link
  29. math

    50 is what percent of 13? Thanks
  30. Math

    Ok
  31. Math

    I got 23 ft.
  32. Math

    What would the height of the building be.
  33. Math

    Thank You!
  34. Math

    kory is standing near a building that has a shadow that is 14 feet long. Kris is 5.5 feet tall, and the length of her shadow is 3.5 feet. set up and solve a proportion to determine the height of the building.
  35. Algebra

    Answer it
  36. math

    Tamika’s dad bought a Mustang convertible for 12,000 dollars to celebrate his first job in 1978, which paid him 15,000 dollars a year. If Tamika is to use the same fraction of her salary as her dad to buy a Mustang convertible, which now sells for 32,000 dollars, what ...
  37. maths

    thats wrong
  38. maths

    Pedro earns 7.50 dollars an hour at his job at Matrix Cinemas. If he works 20 hours this week and his employer withholds a total of 22 percent of his weekly pay for taxes and Social Security, what is his take-home pay for the week?
  39. Math

    Hwan decides to lose weight before the wrestling season begins. He weighs 148 pounds now and loses one pound per week for six weeks. Let y represent Hwan’s weight and let x represent the time in weeks. What is the slope of the line? The y intercept is 148
  40. Math

    Wait so the slope is -x and y intercept is 148?
  41. Math

    Hwan decides to lose weight before the wrestling season begins. He weighs 148 pounds now and loses one pound per week for six weeks. Let y represent Hwan’s weight and let x represent the time in weeks. What is the slope of the line? What is the y intercept
  42. stast

    suppose the alternative hypothesis in a hypothesis test is "the population mean is less than 60" if the sample size is 50 and alpha =.05, the critical value of the z is?
  43. Math

    What is the next term in the sequence 81, 27, 3, 1, 1/3...
  44. Math

    Detemine the sequence as arithmetic, geometric, both or neither. 16,8,4,2,...
  45. Science

    Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens. A. Integumentary system B. Nervous system C. circulatory system D. endocrine system I think it is C
  46. social studies

    Thanks 100% :)
  47. Math

    Which proportion has cross products of 5*24 and 8*15? A. 5/8 = 15/24 B. 5/24 = 8/15 C. 8/24 = 15/5 D. 15/8 = 5/24
  48. Math

    Which ratio forms a proportion with 18/30? A. 20/35 B. 50/90 C. 36/48 D. 60/100
  49. Math

    Which Ratios for a proportion? A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25
  50. Math

    Which Ratios for a proportion? A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25 Which ratio forms a proportion with 18/30? A. 20/35 B. 50/90 C. 36/48 D. 60/100 Which proportion has cross products of 5*24 and 8*15? A. 5/8 = 15/24 B. 5/24 = 8/15 C. 8/24 = 15/5 D. 15/8 = 5/24...
  51. Math

    Convert the map scale to unit rate. How many inches represent one mile? Show Your work. Interpret the meaning of unit rate. 3/10 in. = 7/8 miles
  52. Math

    Thanks
  53. Math

    286 miles in 5 1/2 hours
  54. Math

    Write the ratio as a unit rate
  55. Math

    Ok thanks
  56. Math

    Write the ratio as a unit rate. 8 meters in 10 seconds. A. 0.8 meter per second B. 1.125 meters per second** C. 2 meters per second D. 80 meters per second
  57. History

    Thanks!
  58. History

    What was the 54 mile civil rights march called that was after bloody Sunday?
  59. Math

    an object is moving along the x-axis such that the position of the object in masters at time t in seconds is giving by the function x(t)=t^3-12t^2+36t-5, for 0<=t<=8 a- when is the object moving right? and when to the left? b- When is the object's velocity both ...
  60. Math

    Thanks
  61. Math

    The cost in dollars of a class party is 59+13n, where n is the number of people attending. What is the cost for 44 people.
  62. Math

    Thank You
  63. Math

    d+g/h for d =35, g = 19, and h=6
  64. Math

    How do i do this with and without distribution?
  65. Math

    Thanks
  66. Math

    you want to buy three books that are on sale at 20% off. the original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With distribution. Calculation without distribution.
  67. History

    Thank You
  68. History

    Why was northern Italy a natural birthplace for the Renaissance?
  69. algebra

    George is starting a new streaming music service. For a monthly fee, you can stream 50 songs. There is an additional charge for each song over 50. In August, Bill was charged $11.22 for 67 songs and in September he was charged $13.50. Write a function for the total charge. ...
  70. Math

    These two are correct i just finished the quiz.
  71. Math

    a) y=4 b) m=5 Would this be correct
  72. Math

    Solve using metal math. a) 4y+3=19 b) 2+3m=17
  73. Math

    One of the sides is 5.8 but would the other side go in the place of z. that is what i thought.
  74. Math

    There are not given 2 sides to divide. What do you mean.
  75. Math

    Solve the equation 5.8 = z/2.2
  76. Math

    Thank you so much
  77. Math

    Solve the equation 2.8x = -9.24
  78. Math

    I solved this. It is 18
  79. Math

    What Value of x is a solution to the equation? x-2 = 16
  80. Math

    Write an algebraic expression for the sum of 3 Coins and c Coins
  81. Math

    Evaluate -5g-6 for g = -2
  82. MATH PLEASE HELP

    Thank You
  83. MATH PLEASE HELP

    1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to the nearest whole ...
  84. Math

    I know how to do these now thanks
  85. Math

    or how to do them
  86. Math

    I really just don't understand algebraic equations like these
  87. Math

    1) -5g-6 for g = -2 2) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the equation? x-2 = 16 4) use mental math to solve the equation. z/-12 = -5 5) estimate the solution of the equation x-8.1 = 5.3 to the nearest whole ...
  88. Math

    -5g - 6 for g=-2
  89. religion

    they help and pray for the people in need
  90. math / science

    a bacteria population doubles every eight minutes. if the population begins with one cell how long will it take to grow to 512 cells?
  91. pre calculus

    ohhhhh, i see! thank you for making it simple to understand
  92. pre calculus

    Double Angle Formula. If the double angle formula for cos2(u) = 2cos^2(u)-1, then write the double angle formula for cos2(u) in terms of sine.
  93. art

    keeping facial features in proportion means
  94. Math

    The track at Coolidge Middle School is 14 of a mile long. It takes Melissa 1 minute and 40 seconds to run around the track. How many minutes will it take Melissa to run 3 miles?
  95. Science Please helpppp me!!

    The answer is D) Multicellular. Hope this helps.
  96. physic

    The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 50 m in a straight line, reaching a final speed of 79 km/h. Determine the cheetah's average acceleration during the short sprint. m/s2
  97. CHEMISTRY

    2HBr+Mg(OH)2 -> MgBr2+2H2O how many mL of a 0.2 M HBr solution is required to react with 40 mL of a 0.40 M Mg(OH)2 solution
  98. math

    simplify 8/2 + 9 (12 divided by 3x2)-7 explain each of your steps i thought it was 1
  99. math sequence

    5th term for recursive sequence: a(1) = 1 a(n+1)=3a(n)-1
  100. grammar

    Is this correct? It is the waves, where... The "it is the waves" part. thanks
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