Most popular questions and responses by Carl
  1. Social Studies

    How did the role of the church in education change over time? A. Universities changed from being independent to being part of the church. B. Priests became the only teachers at universities. C. Schools began to provide education beyond religious

    asked on January 7, 2019
  2. Math

    Can someone please explain to me how to solve this: Simplify 6P2. A) 30 B) 15 C) 12 D) 720

    asked on April 23, 2015
  3. stat

    for randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. the scores of 14 randomly selected college students are listed below. use a 0.10 significance level to test the claim that the standard deviation of IQ scores

    asked on May 14, 2012
  4. Math

    The average length of the eight words Betty was asked to spell was 9 letters. The first seven words had the following lengths: 8 letters, 9 letters, 6 letters, 10 letters, 7 letters, 9 letters, and 11 letters. What was the length of the eighth word?

    asked on April 21, 2018
  5. Physics

    The average distance between Earth and the Sun is 1.5 ✕ 10^11 m. a) Calculate the average speed of Earth in its orbit (assumed to be circular) in meters per second. b) What is this speed in miles per hour?

    asked on August 26, 2018
  6. math

    in triangle ABC, AB=6, BC=12 AND AC=X. Which of the following cannot be a value of x? a. 6 b.7 c.8 d.9 e.10

    asked on September 21, 2013
  7. Maths

    The sides of the equilateral triangle is 3x+2,2y-x and y+3 find x and y.and the perimeter of the triangle

    asked on June 1, 2018
  8. Trig

    Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above

    asked on December 13, 2011
  9. calculus

    What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the origin and ending at a point a,b b|------------| | /| | / | | / | | / | | / | | r / | | / | | / | | / | | / | | / |

    asked on September 28, 2011
  10. Geometry

    A 12-foot ladder is leaning against the outside wall of a building. The angle of the ladder with the ground is 75 degrees. The ladder is moved so that the base of the ladder is 5.8 feet from the wall. Determine the angle created by the ladder and the

    asked on December 8, 2017
  11. Dynamics

    A boy running a foot race rounds a flat curve of 50 ft radius. If he runs at rate of 15 mph, at what angle with the vertical will be inclined his body? A.) 16.75° B.) 13.67° C.) 76° show solution step by step thanks

    asked on July 14, 2018
  12. Algebra

    Randall wants to mix 57 lbs of nuts worth $1 per lb with some nuts worth $6 per lb to make a mixture worth $5 per lb. how many lbs of $6 nuts must he use?

    asked on May 20, 2016
  13. English

    Which of the following was valued during the Romantic period? logic individualism balance restraint

    asked on September 23, 2015
  14. Dynamics

    A stone has an initial velocity of 100 fps up to the right at 30 degrees with the horizontal. The components of the acceleration are constant at ax=-4 fps^2 and ay=-20 fps^2. Compute the horizontal distance covered until the stone reaches the point 60 ft

    asked on July 14, 2018
  15. Physics

    Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I

    asked on November 9, 2014
  16. Physics

    Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 7.5 cm/year. a)What distance does it move in 1 s at this speed? b)What is its speed in kilometers per million years?

    asked on August 27, 2018
  17. Chemistry

    How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron

    asked on November 16, 2017
  18. Math

    Differentiate y=13x^2-5x+8

    asked on July 25, 2018
  19. Algebra

    I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor

    asked on January 24, 2008
  20. science

    Can someone describe how a sound wave travels through a medium to create sound. Can you also provide a descriptions of vibrations, longitudinal waves, compressions, rarefactions, and direction of movement in your response. That way I could understand it

    asked on May 15, 2019
  21. chemistry

    A plastic container with a mass of 30 grams gains 1,140 joules of heat. If the temperature of the container increases 20°C, what is the specific heat of the plastic in the container?

    asked on January 4, 2012
  22. English II B

    What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board

    asked on April 3, 2014
  23. Genealogy

    What is the best free of charge way to look up past birth records?

    asked on May 28, 2019
  24. English II B

    Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading anthology 3.a poetry contest 4.a school newspaper

    asked on April 3, 2014
  25. English II B

    A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing

    asked on April 3, 2014
  26. programming logic

    The No Interest Credit Company provides zero-interest loans to customers. (It makes a profi t by selling advertising space in its monthly statements and selling its customer lists.) Design an application that gets customer account data that includes an

    asked on December 5, 2013
  27. Physics

    During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

    asked on August 28, 2018
  28. Physics

    Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some

    asked on November 9, 2014
  29. math

    William is traveling at a rate of 75 miles per hour. How fast is William traveling in feet per second?

    asked on December 4, 2017
  30. math calculus

    Let f be twice differentiable with f(0)=12, f(3)=9, and f '(3)=4.Evaluate the integral upper limit 3 and lower integral 0 xf'' (x)dx

    asked on September 13, 2018
  31. math

    Evaluate the integral given below. integral(x^2+13)^2dx

    asked on September 8, 2018
  32. math

    The median of a set of 8 consecutive even integers is 61. What is the largest integer in the set?

    asked on December 4, 2017
  33. Chemistry

    Given the following equation: Na2O + H2O ---> 2 NaOH. How many grams of NaOH is produced from 1.20 x 10^2 grams of Na2O? How many grams of NaO2 are required to produce 1.60 x 10^2 grams of NaOH?

    asked on March 21, 2012
  34. algebra 2

    teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected /

    asked on April 23, 2009
  35. Science

    A ray of light hits a plane mirror lying across a floor 2m from the vertical wall. The angle of incidence of the ray is 40 degrees. At what point on the wall will the reflected light fall? Express the answer in terms of height from the floor.

    asked on May 2, 2019
  36. precalc

    how to find difference quotient for: f(x) = 1/x+3

    asked on August 29, 2019
  37. science

    why is it advisable to use plasticwares instead of the conventional glasswares in spectrophotometry?

    asked on May 12, 2019
  38. Geometry

    A billiard ball bounces off the sides of a rectangular billiards table in such a way that

    asked on September 27, 2017
  39. Math

    Tameron made a recipe that called 1/4 teaspoon of salt. If the recipe is doubled, how much salt is needed?

    asked on March 17, 2016
  40. Algebra

    If (4,2) is a point on the graph of y=f(x), which of the following points must be on the graph of y=f(2x). a) (4,1) b) (8,2) c) (2,2) d) (4,4)

    asked on September 10, 2019
  41. Precalc

    find difference quotient f(x) = 1/x+3

    asked on August 29, 2019
  42. Math

    t) Let a , b , c and y be the three dimensional vectors a =4j +2k ,b =−3i +4j +4k ,c =3i −j ,y =8i −7j Perform the following operations on these vectors: (a) c⋅a +a⋅y = (b) (a ⋅b )a = (c) ((c⋅c)a )⋅a =

    asked on May 6, 2018
  43. Math

    Michaela walked 2/5 mile to the store in 1/4 hour. What is the walking pace?

    asked on March 17, 2016
  44. Physics

    During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

    asked on August 27, 2018
  45. Essex

    An investment club placed $33,000 into two simple interest accounts. On one account, the annual simple interest rate is 6.5%. On the other, the annual simple interest rate is 4.5%. How much should be invested in each account so that both accounts earn the

    asked on February 16, 2016
  46. Chemistry

    Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M NaOCl(aq) with 0.3 M HBr At 0.00 mL of HBr: At 70 mL of HBr: At 100 mL HBr: At 120 mL of HBr

    asked on March 12, 2015
  47. math

    Water is pumped into a cylindrical tank, standing vertically, at a decreasing rate given at time minutes r(t) = 130 - 10t ft^3/min for 0≤t≤5.The tank has radius 6 ft and is empty when t=0. Find the depth of the gasoline in the tank at t=3.

    asked on August 23, 2018
  48. Math

    convert feet and inches to only feet. a) 17 ft 6 in

    asked on March 8, 2019
  49. physics

    suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?

    asked on August 22, 2012
  50. statistics

    1. A researcher is interested in whether students who attend private high schools have higher average SAT Scores than students in the general population. A random sample of 90 students at a private high school is tested and and a mean SAT score of 1030 is

    asked on June 8, 2011
  51. Chemistry

    1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess

    asked on April 26, 2011
  52. chemistry

    a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387

    asked on November 15, 2008
  53. algebra

    Solve the problem. Frank can type a report in 3 hours and James takes 4 hours. How long will it take the two of them typing together?

    asked on March 20, 2009
  54. Science

    Common suspension and their uses

    asked on June 18, 2019
  55. Batteries

    3 Sn^2+ (aq) + 2 Al (s) 2 Al3+(aq) + 3 Sn(s). What is the voltage for this cell? What is the voltage for the cell if the Sn2+(aq) is [.15] and Al3+(aq) is [1.80]? Using proper line notation, describe the cell described in the question.

    asked on November 9, 2015

    This question tells us to answer if the children bahaved good or bad from the paragraph below. Todos los niños le regalaron a Ana muchas cosas fantásticas. Había muñecas, juguetes, animales de peluche … y más cosas. Susana le regaló un oso de

    asked on February 3, 2015
  57. Chemistry

    A pH = 7.6 buffer is needed in the lab. This buffer is made by first dissolving 17.42 g K2HPO4 in 600 mL of water. What is the pH of this salt solution? This solution of course will be too basic becuase we only have the base of the buffer present. What

    asked on March 12, 2015
  58. Chemistry

    120.0g of ice is melted, how much energy is absorbed?

    asked on February 21, 2014
  59. Science

    Some nitrogen atoms have seven neutrons and some have eight neutrons. These two forms of nitrogen are: a. ions of each other b. phases of each other c. isotopes of each other and how exactly do you know? My book doesn't cover this at all yet its in my

    asked on February 5, 2013
  60. Physics

    When a patient’s injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the neck. This can be accomplished with the system of pulleys shown in the figure. The pulleys are all small and extremely light in

    asked on February 23, 2011
  61. Algebra

    If (4,2) is a point on the graph of y=f(x), which of the followint points must be on the graph of y=f(2x).

    asked on September 10, 2019
  62. science

    if 2 north poles are brought together, is the resultant pole strength of the combination equal to the sum of their pole strengths?

    asked on May 3, 2019
  63. njit

    please life saver i am taking a quiz now can some one help me with this pleeeeeeeaaaaaaaaassssssseeee Calculate the pH of 0.175 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13.

    asked on March 15, 2013
  64. Us history

    Define unicameral legislature and bicameral legislature. Which type of legislature did must states have? I cant find what type of legislature did the states have

    asked on October 13, 2013
  65. Calculus (math)

    A rescue cable attached to a helicopter weighs 2 lb/ft. A 190 lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done by lifting the man if the helicopter is 50 ft above to water.

    asked on April 26, 2013
  66. Calculus

    Give an example of a function that is integrable on the interval [-1,1], but not continuous on [-1,1].

    asked on November 9, 2009
  67. chemistry

    Calculate the increase of entropy in J/K when 8.6 mole of C 2 H 5 OH melts at (-114) o C and 1 atm. ΔH fus = 5.02 kJ/mol

    asked on March 31, 2013
  68. Trig

    In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A

    asked on December 13, 2011
  69. Physics

    A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

    asked on November 21, 2010
  70. Science

    When a bar magnet is cut into two halves repel each other. Why? What becomes of the original north and south poles of that magnet??

    asked on May 3, 2019
  71. Chemistry

    What is the pH of a 150 mL buffer solution containing 0.5 M NaH2PO4 with 0.5 M K2HPO4? Determine the new pH of the solution upon the addition of 10 mL of 1.2 M strong acid to the 150 mL buffer solution above.

    asked on March 12, 2015
  72. physics

    suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?

    asked on August 19, 2012
  73. Calculus

    A particle is moving along the curve y = 2 √{3 x + 7}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 4 units per second. Find the rate of change of the distance from the particle to the origin at this instant.

    asked on October 26, 2010
  74. Physics, need help now

    A car going 15 m/s is brought to rest in a distance of 3 m as it strikes a pile of dirt. How large a force is exerted by the seatbelts on a 90 kg passenger as the car is stopped?

    asked on October 21, 2017
  75. Physics

    In DESPERATE NEED OF HELP!!! An object of mass m = 10 kg and speed v = 2 m/s collides head on with a second object of mass m = 5 kg which has a speed v = 1 m/s. The objects stick together. There are no external forces on the two objects (note the given

    asked on November 10, 2016
  76. math

    the width of a rectangle is 4cm and the length is 8 cm if both the width and the length are increased by equal measures, the area of the rectangle is increased by 64 cm 2. find the length and width of the larger rectangle

    asked on October 26, 2014

    Book april morning Describe both sides of the Boiled pudding controversy in town. What does this reveal about the town?

    asked on October 24, 2013
  78. Chemistry II

    This is what I have. Could you please correct my work? Thank you. Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). reduction Ni²⁺(aq) + 2 e⁻ ⇌ Ni(s) ; E°_red = -0.25V -oxidation Cd(s) ⇌ Cd²⁺(aq) + 2 e⁻ ; E°_ox = 0.40V (negative

    asked on April 28, 2010
  79. Science

    Index of refraction is defined as the ratio of the speed of light in free space and its speed in the medium. What is the speed of light in a medium with n= 1.33?

    asked on May 2, 2019
  80. Math

    Calculate the indicated Riemann Sums for the function g(x)=4-x^2 a)one rectangle b)two rectangles

    asked on July 24, 2018
  81. Chemistry

    Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M HCN(aq) with 0.2 M NaOH At 0.00 mL of NaOH At 85 mL of NaOH. At 150 mL NaOH. At 160 mL of NaOH

    asked on March 12, 2015
  82. Geometry

    A swimming pool is to be constructed in the space of partially overlapping identical circles. Each of the circles has a radius of 9 m, and each passes through the center of the other. Find the area of the swimming pool.

    asked on September 28, 2014
  83. algebra

    A boat can travel 114 miles upstream in the same time that it can travel 186 miles downstream. If the speed of the current is 6 miles per hour, find the speed of the boat without a current.

    asked on August 17, 2011
  84. Physics

    A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.6x10-3 kg bullet with a speed of 670 m/s. What is the Kelvin temperature of the gas?

    asked on November 19, 2013
  85. History

    How did American debates about foreign policy in the 1790s reflect the beliefs of the political parties? i think it tells poltical parties what to change ,but i need more info.

    asked on October 22, 2013
  86. Statistics

    Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.34, P(B) = 0.41, P(A | B) = 0.2

    asked on June 8, 2013
  87. physics

    It takes you 7.3 min to walk with an average velocity of 1.5 m/s to the north from the bus stop to the museum entrance. How far did you walk? Answer in units of m

    asked on September 21, 2012
  88. math

    If you buy a pair of shoes on sale for $48. The price is discounted 25% and the sales tax is 7%. Which of the follwoing statements would be true? Answer choices 1. The final price would be lower if you add the 7% sales tax first and take the 25% discount

    asked on December 4, 2017
  89. trigo

    A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

    asked on November 21, 2015
  90. calculus

    You have been hired by a farmer to design a fenced-in rectangular enclosure for emus. The emus will require 720 square feet of area in which to roam, and the fence will cost 20 dollars per foot. The rectangular area will adjoin an existing wall, so a fence

    asked on November 17, 2015
  91. math

    a variable y varies directly as the square root of a varies x,and equals 6 when x=4 find y when x=25

    asked on November 20, 2014
  92. statistics

    3. A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community service will have higher Christian maturity scores. The

    asked on June 20, 2011
  93. statistics

    2. A teacher wants to investigate whether there is a difference between male and female students in the amount of time they spend studying for statistics. The table below shows the amount of time students spend studying statistics each week. The amounts of

    asked on June 15, 2011
  94. Math

    A flag has a length of 3 1/3 feet when the width is 1 5/6 feet. Write the ratio of the length to the width as a fraction in simplest form.

    asked on June 23, 2016
  95. Chemistry

    How much water must be added to make 500 ml of 12.0 M HCl to 1.0 M HCl (500mL• 12M) / 1.0M =6000m Is this correct?

    asked on May 10, 2015
  96. physics-can anyone solve this please

    3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a

    asked on November 23, 2013
  97. Urgent Chem Help

    A certain substance has a heat of vaporization of 55.30 kJ/mol. At what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 361 K?

    asked on February 10, 2013
  98. physics

    a couple part in a car on moonlit evening. Find that their car is stop in the sand. The women having studied physics, ties a rope to the car's bumper and stretches it around a tree in front of a car. She then pushes with 200 newton force against the

    asked on September 21, 2012
  99. algebra

    Does the function y = 2^x ever cross the x-axis? Explain why or why not

    asked on August 17, 2011
  100. statistics

    3. A researcher is interested in whether listening to music helps or hinders test-performance. To control for differences in cognitive level, this researcher decides to use a within-participants design. He selects a random sample of participants and has

    asked on June 15, 2011


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