Ryan

Newest questions and responses by Ryan
  1. physics

    How much ice (at 0°C) must be added to 1.15 kg of water at 81 °C so as to end up with all liquid at 26 °C? (ci = 2000 J/(kg.°C), cw = 4186 J/(kg.°C), Lf=3.35×10^5 J/kg, Lv= 2.26×10^6 J/kg)

    asked on November 14, 2018
  2. math 100

    The equation for a general normal curve with mean μ and standard deviation σ is y = e−(x − μ)2/(2σ2) σ 2π . Calculate values for x = 20, 30, , 70, 80 where μ = 50 and σ = 10. Note that setting μ = 0 and σ = 1 in this equation gives the

    asked on November 9, 2018
  3. math 100

    The equation for the standard normal curve is an exponential equation: y = e−x2/2 2π Evaluate this formula for x = −4, −3, . . . , 3, 4. (Round your answers to five decimal places.)

    asked on November 9, 2018
  4. math 100

    A package of Toys Galore Cereal is marked "Net Wt. 12 oz." The actual weight is normally distributed, with a mean of 12 oz and a variance of 0.16. (a) What percent of the packages will weigh less than 12 oz? 50 Correct: Your answer is correct. % (b) What

    asked on November 9, 2018
  5. math 100

    A normal distribution has a mean of 85.4 and a standard deviation of 4.88. Find the data value corresponding to the value of z given. (Enter your answer to four decimal places.) z = −3.42

    asked on November 9, 2018
  6. math 100

    A normal distribution has a mean of 85.7 and a standard deviation of 4.81. Find the data value corresponding to the value of z given. (Enter your answer to four decimal places.) z = 0.55

    asked on November 9, 2018
  7. math 100

    Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 55 and the standard deviation is 5. There are 35 students in the class. What score would be necessary to obtain an A? or above

    asked on November 9, 2018
  8. math 100

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 70 people. (You may need to use the standard normal distribution table. Round your answers to the nearest

    asked on November 9, 2018
  9. math 100

    Suppose that, for a certain mathematics class, the scores are normally distributed with a mean of 75 and a standard deviation of 9. The teacher wishes to give A's to the top 7% of the students and F's to the bottom 7%. The next 17% in either direction will

    asked on November 9, 2018
  10. math 100

    Suppose the neck size of men is normally distributed, with a mean of 15.5 inches and a standard deviation of 0.5 inch. A shirt manufacturer is going to introduce a new line of shirts. Assume that if your neck size falls between two shirt sizes, you

    asked on November 9, 2018
  11. social studies

    Explain how the civic virtues of the ancient Romans inspired the Founding Fathers' vision of how citizens should conduct themselves in the United States.

    asked on November 6, 2018
  12. math 100

    The mean defined in the text is sometimes called the arithmetic mean to distinguish it from other possible means. For example, a different mean, called the geometric mean (G.M.), is used in business and economics for finding average rates of change,

    asked on November 5, 2018
  13. math 100

    When you take the Scholastic Assessment Test (SAT), your score is recorded as a percentile score. If you scored in the 92nd percentile, it means that you scored better than approximately 92% of those who took the test. If Lisa's score was 85 and that score

    asked on November 5, 2018
  14. math 100

    Find the standard deviation (rounded to the nearest unit) for the data indicated. Test Score Frequency 90 2 80 5 70 9 60 6 50 4 40 1 30 2 0 5

    asked on November 5, 2018
  15. math 100

    Find the standard deviation (rounded to the nearest unit) for the data indicated. Test Score Frequency 90 1 80 4 70 7 60 6 50 3

    asked on November 5, 2018
  16. physics

    (I attempted on my own already) A 1220 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1860 N crate hangs from the far end of the beam. a) Calculate the magnitude of the horizontal component of

    asked on October 31, 2018
  17. Algebra

    Number of representatives is 80 less than five times the number of senators. There are a total of 520 members

    asked on October 17, 2018
  18. Math

    Can someone please check this? given: line AE and line BD bisect each other. prove: triangle ACB is congruent to triangle ECD Statements 1. Line AE and line BD bisect each other 2. Line AC is congruent to line EC, line DC is congruent to line BC 3. Angle

    asked on October 8, 2018
  19. algebra

    (8−3a^2 )(2a ^ 2 +6)

    asked on October 2, 2018
  20. physics

    A 4.50 kg block is pressed against a vertical wall by a force (→F), as shown in the figure below. The coefficient of static friction between the block and the wall is 0.34 and the directional angle θ for the force is 48.0°. Determine the magnitude of

    asked on September 25, 2018
  21. Physics, Math

    Calculate the time taken by a water pump of power 500 W to lift 2000 kg of water to a tank, which is at a height of 15 m from the ground? Use: g = 10 m/s2 (

    asked on August 21, 2018
  22. AP Calculus

    Can someone help me solve these two questions? Thanks 1) Use the mid-point rule with n = 4 to approximate the area of the region bounded by y = -x^3 and y = -x. 2) A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet

    asked on July 16, 2018
  23. Calculus

    Can someone help me solve these two questions? Thanks 1) Use the mid-point rule with n = 4 to approximate the area of the region bounded by y = -x^3 and y = -x. 2) A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet

    asked on July 15, 2018
  24. Math

    The price of a home is $320,000. The bank requires an 8% down payment and three points at the time of closing. The cost of the home is financed with a 30-year fixed rate at 6%. Find the amount that must be paid for the three points at closing & Find the

    asked on May 14, 2018
  25. Math

    If 100 students surveyed, about how many students own 2 or more pets? Explain

    asked on February 22, 2018
  26. maths

    Verify that the shape with vertices at P(-5, 2), Q(-1, 3), R(-2, -1) and S(-6, -2) is a rhombus.

    asked on February 5, 2018
  27. dynamics

    A worker drops a wrench from the roof of a tall building 100m above the street and at the same instant shouts a warning to the people below. If sounds travels 340 m/s, how long after the warning is heard below does the wrench strike?

    asked on January 29, 2018
  28. Math

    What is an even number that has a 7 in the hundreds place,has an odd number in the thousands place and is a multiple of 10?

    asked on January 25, 2018
  29. health human services

    Our health system went from a Prospective payment system to a fee-for-service system? i picked false

    asked on December 19, 2017
  30. Geometry

    The midpoint of PQ is M=2,−1 One endpoint is P=7,6. Find the coordinates of the other endpoint, Q.

    asked on December 15, 2017
  31. english

    Which of the following is important for an introduction in formal or academic writing? Entertaining the audience Establishing the key point the piece of writing will make Discussing your opinion on the topic for at least three sentences Providing all of

    asked on December 13, 2017
  32. english

    True or False: the following sentence demonstrates parallelism: Cameron is an actor, a writer, and former model. true

    asked on December 13, 2017
  33. english

    Identify the subject, object, and verb in this sentence: Paralegals need strong ethics. need is verb paralegals is subject strong is object am i right

    asked on December 13, 2017
  34. english

    A writer creates unity when topic sentences in an essay each relate to a main idea from an introduction or thesis statement. i pick true

    asked on December 13, 2017
  35. English

    A thesis statement clarifies the main point an essay will make. I say true

    asked on December 13, 2017
  36. Sociology

    Analyze the functions of the family by addressing the ideal family structure as it compares to real family structures. In essence, compare the ideal and real culture of the American family.

    asked on December 12, 2017
  37. Sociology

    Do you feel there are there systemic consequences in our society from the polarizing of our genders? Explain your point of view and offer examples for support.

    asked on December 12, 2017
  38. english

    Question 1 Of the choices below, which sentence demonstrates parallelism? a. Sydney slept late on Saturday. b. Clint made a cake for dessert and had milk with it. c. To Kill a Mockingbird is a classic American novel about a young girl's journey to

    asked on December 7, 2017
  39. english

    PART TWO: Revise the paragraph below based on the errors you found above. "Whenever I’m getting reading to eat my cat is always at my feet at the stove I am always tripping over him and swearing at him nevertheless he is such a funny creature how many

    asked on December 7, 2017
  40. english

    PART ONE: Read the paragraph and identify the spelling and grammar errors. "Whenever I’m getting reading to eat my cat is always at my feet at the stove I am always tripping over him and swearing at him nevertheless he is such a funny creature how many

    asked on December 7, 2017
  41. Pre-Calculus 12

    How do I solve the following question: sin(5x)cos(3x) - cos(5x)sin(3x) = 1 So far I got this: sin (8x) = 1 Please help

    asked on November 7, 2017
  42. Physics

    The spring of a spring gun is compressed a distance (d) of 3.2 cm from its relaxed state, and a ball of mass m = 12 g is put in the barrel. With what speed will the ball leave the barrel once the gun is fired? The spring constant is 7.5 N/cm. Assume no

    asked on November 5, 2017
  43. Physics

    Two metal sphere, suspended by vertical cords, initially touch. Sphere 1, with mass 30 g is pulled to the left to a height 8.0 cm and then released. After swinging down, it undergoes and elastic collision with sphere 2 whose mass is 75 g. a) What is the

    asked on November 5, 2017
  44. physics

    Two skaters collide an embrace, in a completely inelastic collision. That is, they stick together after impact. The origin is placed at the point of collision. Alfred, whose mass is 83 kg, is originally moving east with speed 6.2 km/h. Barbara, whose mass

    asked on November 3, 2017
  45. English

    a good student requires three essential characteristics; they must have a positive attitude towards learning, are willing to make mistakes, and possess good work habits. I would like a couple paragraph idea starters

    asked on September 30, 2017
  46. Spanish

    In this unit, you learned about several states that border Mexico. Write a short paragraph that describes at least two similarities and two differences between those states

    asked on September 26, 2017
  47. Calculus

    I really don't get this question :( What is 2+2? a. 3 b. 7 c. 4 d. -4 I really need help!!!

    asked on September 20, 2017
  48. ALGEBRA

    A rectangular room is 1.2 times as long as it is wide, and its perimeter is 25 meters. Find the dimension of the room rounded to the nearest tenth. The length is: The Width is:

    asked on August 14, 2017
  49. Precal 12

    What is the value of k in the function f(x) = (2-k)/(5x+k) if its graph passes through the point (3, -2/19) A. -19/2 B. 4 C. -10 D. No such k exists I think its D, but I am not sure. Please help quickly.

    asked on June 22, 2017
  50. Pre-Calculus 12

    how to solve 3^(x-2) = 5^x

    asked on June 22, 2017
  51. Precal12

    If (n+1)C(n-1) = 28, find the value of n C stands for Combinations

    asked on June 20, 2017
  52. precalc 12

    Imagine that you have ten small light bulbs, of which three are burned out a) in how many ways can you randomly select 4 of the light bulb b) in how many ways can you select two good light bulbs and two burned out light bulbs? Hel needed Urgently

    asked on June 20, 2017
  53. Social Studies

    I need to write a paper on a transgender role model. It can be someone in the field of art, science, math, or business leadership. Any suggestions?

    asked on June 16, 2017
  54. Physics 11

    The diagram shows a collision between a 4.0 kg toy car and a stationary 8.0 kg toy truck. After the collision, the car bounces back at 1.0 m/s while the truck goes forward at 2.0 m/s. Based on these values, are momentum and kinetic energy conserved? Image

    asked on June 14, 2017
  55. Physics 11

    A 15 kg block is sitting on a level surface. The coefficient of friction between the block and the surface is 0.32. A horizontal force of 25 N is then applied to the block. What is the acceleration of the block while the horizontal force is being applied?

    asked on June 14, 2017
  56. Physics 11

    A 15 kg block i

    asked on June 14, 2017
  57. Physics 11

    A 4.00 kg block is accelerated along a level surface at 3.00 m/s^2. The applied force is 20.0 N. What is the coefficient of friction between the block and the surface?

    asked on June 14, 2017
  58. Physics !! Help Needed UrGeNtLy!!

    A toddler applies a 25.0 N force to a chair over a distance of 2.5 m, the chair is being pushed across a smooth floor against a force of friction (10.0 N resistance). How much work is being done?

    asked on June 11, 2017
  59. Physics

    A toddler applies a 25.0 N force to a chair over a distance of 2.5 m, the chair is being pushed across a smooth floor against a force of friction (10.0 N resistance). How much work is being done?

    asked on June 11, 2017
  60. Math

    A van leaves town x at 6:45am and travels towards town y ,400km away at an average speed of 80km/hr.At 8:00am a truck left y for x at an average speed of 60 km/hr.at what time will the two meet.

    asked on June 8, 2017
  61. Pre-Calculus 12

    I am refering to the question posted on Tuesday, June 6, 2017 at 8:26pm. "how to graph y= (x^2-3x-10)/(x-2)" This is the reply I got: Pre-Calculus 12 - Damon, Tuesday, June 6, 2017 at 9:21pm (x-5)(x+2)/(x-2) well we know it is 0 at x = 5 and at x = -2 and

    asked on June 8, 2017
  62. Pre-Calculus 12

    how to graph y= (x^2-3x-10)/(x-2)

    asked on June 7, 2017
  63. Pre-Calculus 12

    Write the following expression as a single logarithm: 4 log 3 + 2

    asked on May 20, 2017
  64. algebra 1

    find the sum: (-5) + (-5) + (+7) + (-2) please help its due tomorrow thanks

    asked on May 19, 2017
  65. algebra 1

    tom has read 3/8 of the 480 pages in the book. how many pages are left to read? what is the ratio of pages read to pages not yet read? please help! due tomorrow

    asked on May 18, 2017
  66. algebra 1

    how far will a migrating duck fly in 7 hours at the speed of 21 mph?

    asked on May 18, 2017
  67. algebra 1

    the ratio of right handed to left handed students in the school was 3 to 14. if the total number in both categories was 714 how many right handed students were in the school? please help its due tomorrow! i totally forgot about the extra homework my

    asked on May 18, 2017
  68. Chemistry

    Perpare 500ml of 1M HCl solution from a bottle of concentrated 37%(W/W) HCL stock with a density of 1.19g/ml. 37%= 37/100 x 100 therefore mass is 37g molarity = mol/vol 1= mol/0.5 mol=0.5 mass of Hcl needed = molxmr mass = 0.5 x 36.5 mass = 18.25g

    asked on April 30, 2017
  69. Physics

    What happens to a current-carrying wire that is located in a magnetic field? Does the orientation (angle) of the wire make a difference? Explain.

    asked on April 11, 2017
  70. Physics

    A wasp accumulates 1.0x10^-14C of charge while flying perpendicular to the earth's magnetic field of 4.0X10^-5T. How fast is the wasp flying if the magnetic force acting on it is 3.0x 10^-16N?

    asked on April 11, 2017
  71. Physics

    Evelyn wears glasses whose wire frames are shaped like to circles, each with an area of 8.0x10^-4 m^2. The horizontal component of the earths' magnetic field in Evelyn's hometown is 3.9x10^-5 T. If Evelyn turns her head back and forth, rotating it through

    asked on April 11, 2017
  72. Math

    I need help solving the problem not the answer. (Multiple Choice) The steps below show the incomplete solution to find the value of x for the equation 7x + 8 − 3x = −6 + 10: Step 1: 7x + 8 − 3x = −6 + 10 Step 2: 7x + 8 − 3x = 4 Step 3: 4x + 8 = 4

    asked on March 30, 2017
  73. Mathematics

    The eighth term of an arithmetic series is twice the third term. The sum of the first eight terms are 39.Calculate the first term. Please help i've been stuck for hours on this question

    asked on March 15, 2017
  74. Maths

    The eighth term of an arithmetic series is twice the third term. The sum of the first eight terms are 39.Calculate the first term. Please help

    asked on March 15, 2017
  75. physics

    a box with a mass of 25kg is lifted (without acceleration) through a height of 2.0m, in order to place it upon the shelf of a closet. The value of acceleration due to gravity g= 9.8ms^2 How much work is required to lift the box to this position? i figured

    asked on February 8, 2017
  76. english

    What are (desire lines) according to tim cresswell place?

    asked on January 31, 2017
  77. Vectors

    Write a second symmetric equation for the following line, given the point on the line A(0, 5, -1/2) (x-2)/4= (y-4)/-2 = z Would it not be x/4 = (x-5)/-2 = z+1/2

    asked on January 16, 2017
  78. Math

    How long will it take to fill 6 similar tanks completely with water? Give your answer in hours and minutes

    asked on January 11, 2017
  79. Trig

    Let n be a fixed positive integer. Describe all solutions of sin(n theta) = 1/2 I know that the solutions would be (π/6)/n+(2πx)/n and (5π/6)/n+(2πx)/n ? How do I 'describe'

    asked on January 8, 2017
  80. Math

    Parallelogram ABCD is inscribed in a circle. Then, the measure of angle A must be 90?

    asked on January 8, 2017
  81. Math

    Julie has 8 more than three times as many quarters as dimes. The total value of the coins is $12.20. How many of each kind of coin does she have?

    asked on January 5, 2017
  82. math

    what is the strategy of 12 were bought by Logan 1/3 was choc.chip 1/3 was sugar 1/3 was peanut butter how many of each kind of cookie did logan buy

    asked on December 7, 2016
  83. math

    Alex Hurry Guys what strategy was used

    asked on December 7, 2016
  84. MATH

    Logan bought 12 cookies 1/3 was choc chip 1/3 was sugar and 1/3 was peanut butter How many of each kind of cookie did Logan buy

    asked on December 7, 2016
  85. Algebra

    The difference between 5 times a number and 20 equals the sum of the number and 40. Find the number

    asked on December 1, 2016
  86. Stoichiometry

    Suppose you wanted to add just enough 0.40M calcium chloride solution to 75.0mL of 0.60M of sodium carbonate solution for all of the sodium carbonate and calcium chloride to react. B) what mass of calcium carbonate would be produced (assuming a 100% yield)

    asked on November 27, 2016
  87. Stoichiometry

    Suppose you wanted to add just enough 0.40M calcium chloride solution to 75.0mL of 0.60M of sodium carbonate solution for all of the sodium carbonate and calcium chloride to react. a) What volume of 0.40M calcium chloride solution would be required?

    asked on November 27, 2016
  88. Stoichiometry

    Which one is the limiting reactant if 0.0453 moles of sodium carbonate was used and 0.0216 moles of calcium choloride was used? Balanced Eq. Na2CO3 + CaCl2 = CaCO3 + 2NaCl

    asked on November 27, 2016
  89. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked on November 25, 2016
  90. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked on November 25, 2016
  91. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked on November 22, 2016
  92. Physics

    A block that has a mass of 0.0190 kg and a block that has a mass of 2.00 kg are attached to the ends of a rope. A student holds the 2.00-kg block and lets the 0.0190-kg block hang below it; then he lets go. Air resistance can be neglected. 1)What is the

    asked on November 20, 2016
  93. Math

    A game is played using one dice. If the dice is rolled and shows 1, the player wins $1; if it shows 2, the player wins $2; if it shows a 3, the player wins $3. If the die shows 4,5,or 6 the player wins nothing. a.) If there is a charge of $1.25 to play the

    asked on November 18, 2016
  94. English

    Which did Anton have more allegiance to: his caste of genetically enhanced beings or his brother?

    asked on November 18, 2016
  95. English

    Why is the society in Gattaca so devoid of happiness, vitality and fun?

    asked on November 18, 2016
  96. Biology

    What are 2 advantages for binary fission in bacteria?

    asked on November 16, 2016
  97. Chemistry pH, acids, and bases

    Trichloroacetic acid (CCl3CO2H) is a corrosive acid that is used to precipitate proteins. The pH of a 0.050 M solution of trichloroacetic acid is the same as the pH of a 0.040 M HClO4 solution. Calculate Ka for trichloroacetic acid. I just don't know where

    asked on October 24, 2016
  98. Physics

    A 1200 kg car rounds a curve of radius 71 m banked at an angle of 11°. What is the magnitude of the friction force required for the car to travel at 82 km/h? My physics optional extra work: This would be helpful so I can compare the solutions here as I do

    asked on September 30, 2016
  99. Physics

    A 0.79 kg ball is connected by means of two ideal strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The upper string is 29.0 cm long and has a tension of 29.7 N, and it makes an angle θ2 = 64.0° with the rod, while the

    asked on September 30, 2016
  100. Physics

    The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. (a) Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed of a person situated at

    asked on September 30, 2016

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