# 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)

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

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.)

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

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

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

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

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

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

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

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.

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,

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

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

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

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

17. ## Algebra

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

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

19. ## algebra

(8−3a^2 )(2a ^ 2 +6)

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

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 (

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

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

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

25. ## Math

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

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.

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?

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?

29. ## health human services

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

30. ## Geometry

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

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

32. ## english

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

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

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

35. ## English

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

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.

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.

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

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

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

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

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

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

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

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

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

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!!!

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:

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.

50. ## Pre-Calculus 12

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

51. ## Precal12

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

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

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?

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

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?

56. ## Physics 11

A 15 kg block i

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?

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?

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?

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.

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

62. ## Pre-Calculus 12

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

63. ## Pre-Calculus 12

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

66. ## algebra 1

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

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

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

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.

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?

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

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

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

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

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

76. ## english

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

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

78. ## Math

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

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'

80. ## Math

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

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?

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

83. ## math

Alex Hurry Guys what strategy was used

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

85. ## Algebra

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

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)

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?

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

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

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

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

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

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

94. ## English

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

95. ## English

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

96. ## Biology

What are 2 advantages for binary fission in bacteria?

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

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