Popular questions and responses by Tim
  1. Math

    1. Plane hkp and plane rkp are two distinct planes. name the intersection of the plane hkp and plane rkp. A) Ray KP B) Ray HK C) Ray RP D) The planes need not intersect. Is the answer A? Please correct me if I am wrong. Thank you!

    asked on September 14, 2015
  2. Math

    1. What is the name of the ray that is opposite of ray BA? Description of the ray. It's a straight line with the points A B C D all in a row. A) Ray BD B) Ray BA C) Ray CA D) Ray DA This doesn't make sense. I thought that CD would be opposite of BA. But

    asked on September 14, 2015
  3. Calculus Help Please!!!

    A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which the area within the circle is increasing after each of the following. after 1 s = after 3 s = after 7 s =

    asked on April 2, 2014
  4. Calculus

    A container in the form of a right circular cone (vertex down) has a radius of 4m and height of 16m. If water is poured into the container at the constant rate of 16m^3/min, how fast is the water level rising when the water is 8m deep. V=(pi/3)(r^2)h

    asked on July 27, 2014
  5. Physics

    When a converging lens is used in a camera (as in the first drawing), the film must be placed at a distance of 0.240 m from the lens to record an image of an object that is 4.30 m from the lens. The same lens is then used in a projector (as in the second

    asked on April 10, 2013
  6. Math

    1. Use formulas to find the lateral area and surface area of the given prism. Round your nearest answer to the nearest whole number. use the large 19x6 m rectangles on the top and bottom as the bases. Left corner is 2m, bottom length is 19m, and right face

    asked on May 16, 2016
  7. Math

    1. Which of the following best describes the altitude of a triangle? A) A segment perpendicular to a side of the triangle. B) A segment that passes through the midpoint and is perpendicular to a side of a triangle. C) A segment drawn from the vertex to the

    asked on February 1, 2016
  8. English

    A brief, concise introduction can be effective. True False I pick true, please recheck my answer.

    asked on August 6, 2016
  9. Algebra

    Find the polynomial function P of the lowest possible degree, having real coefficients, with the given zeros. 3+2i, -2 and 1

    asked on March 10, 2011
  10. human resource management

    1. Critically evaluate the job analysis that Mary conducted for the position of assistant manager. Has she used appropriate methods? What are the strengths and weaknesses of her efforts? 2. What kind of factors about Today's Fashion and its operations

    asked on May 25, 2011
  11. Math

    1. The two rectangles are similar. Which is the correct proportion for corresponding sides? the two rectangles are 4 by 12 and 8 by 24. thanks! A) 12/8=24/4 B) 8/4=24/12 C) 12/4=8/24 D) 4/12=24/8 Is the answer C? I'm not quite sure about it but that's what

    asked on March 14, 2016
  12. Calculus

    Find all points on the graph of the function f(x) = 2 cos x + cos^2 x at which the tangent line is horizontal. (Use n as your arbitrary integer.) smaller y-value (x,y)= larger y-value (x,y)=

    asked on March 9, 2014
  13. Science Check Answer

    1. Which of the following is the correct definition of minerals? A) A naturally occurring, inorganic solid that has a crystal shape and definite chemical composition. B) A naturally occurring, inorganic solid that forms through crystallization of melted

    asked on May 2, 2016
  14. Science

    1. What is the difference between a scientific theory and a scientific law? A) A scientific theory describes a pattern of observations, while a scientific law is an educated guess based on observation. B) A scientific theory is based on a few experiments,

    asked on September 14, 2015
  15. Calculus

    Find equations of both the tangent lines to the ellipse x^2 + 4y^2 = 36 that pass through the point (12, 3). smaller slope y= larger slope y=

    asked on March 14, 2014
  16. Physics

    A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion in which the string traces a conical surface with half-angle = 25.0. What tangential speed must the bob have so that it moves in

    asked on September 30, 2010
  17. Math

    1) A plane is located at C on the diagram. There are two towers located at A and B. The distance between the towers is 7,600 feet, and the angles of elevation are given. a) find BC, the distance from Tower 2 to the plane, to the nearest foot. b) find CD,

    asked on April 11, 2016
  18. Math

    1. Two angles whose sides are opposite rays are called _____ angles. Two coplanar angles with a common side, a common vertex, and no common interior points are called ____ angles. A. Adjacent; vertical B. adjacent; complementary C. vertical; adjacent D.

    asked on September 18, 2015
  19. English

    Which of the following is unimportant for an introduction in formal or academic writing? a.Entertaining the audience b.Establishing the key point the piece of writing will make c. Discussing your opinion on the topic for at least three sentences.

    asked on August 6, 2016
  20. Calculus

    A ship sailing parallel to shore sights a lighthouse at an angle of 12 degrees from its direction of travel. After traveling 5 miles farther, the angle is 22 degrees. At that time, how far is the ship from the lighthouse?

    asked on October 23, 2011
  21. Math

    1. To find the height of a pole, a surveyor moves 120 feet away from the base of the pole and then, with a transit 8 feet tall, measure the angle of elevation to the top of the pole to be 36*. to the nearest foot, what is the height of the pole? A) 87

    asked on April 19, 2016
  22. statistics

    In a contest in which 8 contestants are entered, in how many ways can the 5 distinct prizes be awarded?

    asked on August 8, 2010
  23. Math

    1. What is the area of the circle in terms of pi? The diameter is 4.9. A) 9.8 pi m^2 B) 12.005 pi m^2 C) 6.0025 pi M^2 D) 24.01 pi m^2 I've redid this problem over and over again, and I keep getting an answer that isn't one of the choices. The closest my

    asked on June 7, 2016
  24. Math

    1. The figure represents the overhead view of a deck surrounding a hot tub. What is the area of the deck? Round to the nearest tenth. *IF You search this question it is the first link that comes up that has the image. It just doesn't give me a clear

    asked on April 28, 2016
  25. College Physics

    A truck moving north at a speed of 70 km/h. The exhaust pipe on top sends out a trail of smoke that makes a 20 degree angle east of south. If the wind is blowing toward the east. What is the wind speed at that location?

    asked on February 10, 2016
  26. English

    In 25-50 words, describe what a thesis statement does. Once you have narrowed the topic of your essay, it is important to state your topic clearly in one sentence. Like the topic sentence in the paragraph, the thesis statement introduces what the essay is

    asked on August 6, 2016
  27. Math

    1. The length of the hypotenuse of a 30-60-90 triangle is 7. Find the perimeter. A) 7/2+21/2 sqrt 3 B) 21+7 sqrt 3 C) 7+21 sqrt 3 D) 21/2 + 7/2 sqrt 3 Could someone please help me, I don't know how to do this. Thank you!

    asked on June 7, 2016
  28. Math

    1. In triangle DEF, m angle D=45, m angle E=63, and EF=24 in. What is DE to the nearest tenth of an inch? A) 30.3 in. B) 15.1 in. C) 32.3 in. D) 10.5 in. Is the Answer A? I'm not quite sure though since i'm confused on this question. If someone could help

    asked on April 19, 2016
  29. Physics

    A tennis ball, starting from rest, rolls down a hill. At the end of the hill the ball becomes airborne, leaving at an angle of 35° with respect to the ground. Treat the ball as a thin walled spherical shell (I=2/3 mr^2 )and determine the range x it

    asked on January 26, 2016
  30. Physics

    For a given initial projectile speed, you observe that the projectile has a certain range R at a launch angle A = 30 degrees. For what other launch angle will the projectile have the same range (assuming the same initial projectile speed)? Without the use

    asked on February 17, 2014
  31. math 242

    It is estimated that the demand for a manufacturer's product is increasing exponentially at an instantaneous rate of 7% per year. If the current demand is increasing by 7000 units per year and if the price remains fixed at $100 per unit, how much revenue

    asked on January 27, 2012
  32. English

    What is the maximum amount of your paper that should be a direct quotation? A. 15% B. 20% C. 25@ D. No maximum as long as all material is cited properly. I say B

    asked on October 1, 2016
  33. Physics

    Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a resistance of 0.835. What is the resistance of the copper wire? Take the resistivity of copper to be 1.72 x 10-8 Ω·m, and that of aluminum to be 2.82 x 10-8

    asked on June 5, 2013
  34. Physics

    The amount of heat per second conducted from the blood capillaries beneath the skin to the surface is 250 J/s. The energy is transferred a distance of 1.7 x 10-3 m through a body whose surface area is 1.8 m2. Assuming that the thermal conductivity is that

    asked on April 30, 2013
  35. Physics

    An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. How much work is done by the lifting force (include units)? b.) How much work is done by the Earth on the object? c.) What is the net work done on the object? d.)

    asked on December 9, 2012
  36. Grammar

    Topic sentences in body paragraphs should usually show some relationship to an idea from the introduction or thesis statement. 1. True 2. False I answered true. Check my answer for me and thanks.

    asked on July 23, 2016
  37. Grammar

    An introduction must contain a thesis statement. 1. True 2. False I answered true. Please check my work

    asked on July 23, 2016
  38. Physics

    Determine the magnitude of the vector sum V=V1+V2 and the angle theta(x) which V makes counterclockwise from the positive x-axis. V1 = 34 units and makes a 20 degree angle with the +x axis V2 = 28 units and forms a 3,4,5 triangle with the -x axis

    asked on August 26, 2014

    As a standard voltaic cell runs, it "discharges" and the cell potential decreases with time. Explain.

    asked on April 19, 2014
  40. maths

    One pump fills a tank two times as fast as another pump. If the pumps work together they fill the tank in 18 minutes. How long does it take each pump working alone to fill the tank?

    asked on February 2, 2014
  41. English

    When the servers arrived, Jack gave them the information on today's specials. He talked enthusiastically about the fresh berries: "They look fantastic! I want to serve them with shortcake." 1. In the above passage, "talked" is an example of a(n):

    asked on November 18, 2013
  42. Chemistry 2B - UC Davis

    Now calculate Kb the base dissociation constant for [C2H3O2-], acetate anion, for each of your trials from the concentrations of species at the equivalence point. Report 3 significant figures, e.g. 5.97E-10.

    asked on May 11, 2012
  43. Math

    Fill in the missing numbers to complete the linear equation that gives the rule for this table. x y -91 6 -50 -35 -34 -51 -11 -74

    asked on February 22, 2019
  44. Math

    1. What is the area of a regular octagon with an apothem 16 inches long and a side 19 inches long? Round the answer to the nearest inch. A) 144 in^2 B) 216 in^2 C) 1,216^2 D) 2432 in^2 Is the answer D? That's what I solved it.

    asked on June 8, 2016
  45. Math

    1. Determine whether the two figures are similar. If so, give the similarity ratio of the smaller figure to the larger figure. The figures are not drawn to scale. Figure One: (CYLINDER) Height is 9.9 and radius is 1.3 Figure Two: (CYLINDER) Height is 23.76

    asked on May 24, 2016

    Albert is saving up money for a down payment on a house. He currently has $4718, but knows he can get a loan at a lower interest rate if he can put down $5323. If he invests the $4718 in an account that earns 5% annually, compounded quarterly, how long

    asked on October 9, 2015
  47. Social Studies

    1)How did the shift to farming impact native american cultures? A) Farming impact native cultures to build more permanent shelters out of brick, clay, stone, and wood. B) Agriculture led to a new way of life for native peoples, encouraging the development

    asked on September 9, 2015
  48. English

    A topic sentence should be very long. True False I pick false

    asked on August 6, 2016
  49. Math

    1. What is the surface area of the pyramid shown to the nearest whole number? The diagram is not drawn to scale. The lengths are, 3ft as the base, 3ft as the width, and the height is going up at an angle on the outside face on the pyramid which is 8ft. A)

    asked on June 8, 2016
  50. Chemistry

    1) Determine the amount of heat in kJ given off when 1.26 x 10^4 g of NO2 are produced according to the equation: 2NO (g) + O2 (g) --> 2NO2 (g) and delta (H) = 483.6 kJ/mol 2) A sheet of gold weighing 10 g and at a temperature of 18 degrees C is placed on

    asked on November 18, 2014

    Steve cutter sells big blade lawn mowers in his hardware store, and he is interested in comparing the reliability of the mowers he sells with the reliability of Big blade mowers sold nationwide. Steve knows that only 15 percent of all Big Blade mowers sold

    asked on December 27, 2011
  52. English

    Revise the following sentence to omit personal pronouns. I think it is important for you to evaluate information before it in a paper. It's important to evaluate information before including in your paper. Please check my work.

    asked on February 4, 2017
  53. English

    Subject guides contain sources that have been selected by humans. True False I say True

    asked on October 1, 2016
  54. Science

    which two conditions are required for cloud formation? A) high humidity and warm temperatures. B) high humidity and cool temperatures. C) warm temperatures and the presence of particles. D) cool temperatures and the presence of particles. Is there a link I

    asked on May 2, 2016
  55. Statistics

    A survey of physicians in 1979 found that some doctors give a placebo to patients who complain of pain for which the physician can find no cause. If the patients' pain improves, these doctors conclude that it had no physical basis. The medical researchers

    asked on November 20, 2015
  56. Algebra

    Suppose a population of bacteria in a Petri dish has a doubling time of 6 hours. How long will it take for an initial population of 11000 bacteria to reach 20000? Round your answer to two decimal places.

    asked on October 10, 2015
  57. Math

    1. Name the intersection of plane ACG and plane BCG. A. AC B. BG C. CG D. The planes need not intersect. Is the answer C? this is hard for me since there isn't a picture. Thank you!

    asked on September 18, 2015
  58. Statics

    If both the projection Pa and component Fb of the force F are 305 N, determine the magnitude F and the orientation è of the b-axis. There is a 70 degree angle from the negative y-axis to the a-axis. There is a 108 degree angle from the negative y-axis to

    asked on September 1, 2014
  59. Physics

    Assume that you take data on the projectile range for a variety of different launch angles A at a fixed initial velocity Vo. You would like to plot your data to see if the range formula discussed in the introduction is supported by the data. The easiest

    asked on February 17, 2014
  60. algebra

    Bob had three 10' lengths of conduit. If he used a total of 13.75' of conduit to install a motor, how much total conduit does he have left?

    asked on June 28, 2012
  61. English

    Any good thesis statement should contain in-text citations. A. True B. False I say true.

    asked on January 21, 2017
  62. Grammar

    A thesis statement clarifies the main point an essay will make. 1. True 2. False I answered true. Please check my work.

    asked on July 23, 2016
  63. Math

    1. O is the center of the given circle. the measure of angle O, is 134. The diagram is not drawn to scale. Assuming that the lines that appear to be tangent are tangent, what is the value of x? A) 67 B) 46 C) 314 D) 268 can someone please help? I saw an

    asked on June 8, 2016
  64. physics

    (a) Two point charges totaling 7.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.561 m. What is the charge on each?

    asked on February 14, 2016
  65. Chemistry

    1) A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/C. The temperature increases by 1.126 degrees C. Calculate the heat given off by the burning Mg, in kJ/g and kJ/mol. 2) Determine the

    asked on November 18, 2014
  66. Chemistry

    Free-energy change, ΔG∘, is related to cell potential, E∘, by the equation ΔG∘=−nFE∘ where n is the number of moles of electrons transferred and F=96,500C/(mol e−) is the Faraday constant. When E∘ is measured in volts, ΔG∘ must be in

    asked on May 18, 2014
  67. Elements of Calc.

    A 17 foot ladder is placed against a wall. if the foot of the ladder is pushed toward the wall at 0.5 feet per second, how fast is the top of the ladder rising when the foot is 8 feet from the wall?

    asked on May 1, 2013
  68. social studies

    Although the Chesapeake and New England colonies differed in many ways, relations with Native Americans followed a similar course in both regions. Why? What were the biggest factors in relations between the two sides? Did relations change over time and

    asked on September 10, 2011
  69. physics

    3. A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage

    asked on June 8, 2011
  70. math

    david gained 14 pounds over the winter. he went on a diet and lost 26 pounds. then he regainged 5 pounds and weighed 179 pounds. how much did he weigh orignally ?

    asked on October 15, 2009
  71. Chemistry

    Does anyone know what CH3CH2CH(OH)COOH or C4H9O(C=O)CH3 is?

    asked on February 16, 2008
  72. Grade 12 Calculus

    A science project studying catapults sent a projectile into the air with an initial velocity of 24.5 m/s. The formula for distance (s) in meters with respect to time in seconds is s = -4.9t2 + 24.5t. a)Find the time that this projectile would appear to

    asked on March 18, 2018
  73. English

    Scholarly articles contain loosely related paragraphs, without a formal structure. True False I say False

    asked on October 1, 2016
  74. English

    Identify and list one error in the sentence below: If it ain’t broke, don’t fix it. Error:? not sure on this one.

    asked on July 30, 2016
  75. English

    Identify and list one error in the sentence below: How can yous tell when the cake is fully baked? Error:yous

    asked on July 30, 2016
  76. Math

    1. What is the surface area of the cylinder in terms of pi? The diagram is not drawn to scale. A) 990 pi in^2 B) 342 pi in^2 C) 378 pi in^2 D) 504 pi in^2 The radius is 9 and the height is 19. when I solve this, no matter what the formula is, I always get

    asked on June 8, 2016
  77. Math

    1. Based on the given information, what can you conclude, and why? Given: m angle P= m angle T ; PR=TR. A) Triangle QRP is congruent to Triangle TRS by SAS. B) Triangle QRP is congruent to Triangle SRT by SSS. C) Triangle QRP is congruent to Triangle SRT

    asked on February 9, 2016
  78. Math

    1. Write the converse of the following true conditional statement. if the converse is false, write a counterexample. If a < 10, then a < 15 a) if a > 10, the a > 15; false. Counterexample: a=12 and a

    asked on October 13, 2015
  79. Maths

    4. Tonya is 1.3 meters tall. She stands 7 meters in front of a tree and casts a shadow 1.8 meters long. How tall is the tree?

    asked on November 12, 2014


    asked on August 21, 2014
  81. Chemistry

    A sample of oxygen, O2, occupies 32.2 mL at 30 °C and 452 torr. What volume will it occupy at –70 °C and the same pressure?

    asked on November 7, 2017
  82. Math

    The two stadiums with the largest capacities are Marshfield Stadium and Bowden Stadium. The capacity of Marshfield Stadium exceeds that of Bowden by 7,341 people. Combined, the two stadiums have a capacity of​ 210,355 people. Find the capacity of each

    asked on March 12, 2017
  83. English

    The reputation of the author is an important criterion to determine when evaluating a book to include for scholarly research. True False I say True.

    asked on October 1, 2016
  84. English

    Identify and list one error in the sentence below: Hand sanitzer doesnt kill all germs. Error:doesnt

    asked on July 30, 2016
  85. Math

    1. The volume of a sphere is 1476 pi m^3 . What is the surface area of the sphere to the nearest tenth? A) 629.9 m^2 B) 672.4 m^2 C) 1,344.8 m^2 D) 1,973.5 m^2 Is the answer D?

    asked on June 7, 2016
  86. Math

    1. In ABC, A is a right angle, and m B=45*. Side CA also has a length of 17ft just to let everyone know. What is the length of BC? If the answer is not an integer, leave it in simplest radical form. The diagram is not shown to scale. A) 54 ft B) 17 sqrt 3

    asked on June 7, 2016
  87. Language Arts

    "President Lincoln's Declaration of Emancipation, January 1, 1863 by Frances E. W. Harper It shall flash through coming ages, It shall light the distant years; And eyes now dim with sorrow Shall be brighter through their tears It shall flush the mountain

    asked on April 21, 2016
  88. Math

    1. If Angle ABC is congruent to Angle DEF by side-side-side triangle congruence, the angle B is congruent to Angle E by? A) Side-angle-side congruence. B) Angle-angle-side congruence. C) Corresponding parts of congruence. D) Corresponding parts of

    asked on January 30, 2016
  89. Math

    1. A ferris wheel is drawn on a coordinate plane so that the first car is located at the point (30,0). what are the coordinates of the first car after a rotation of 270* about the origin. A) (30,0) B) (-30,0) C) (0,-30) D) (0,30) This doesn't make any

    asked on November 4, 2015
  90. Math

    School is 2 miles from home along a straight road. The table shows your distance from home as you walk home at a constant rate. Time(mins): 10-20-30 Distnce(mi)1.5-1-0.5 1)Is the relationship in the table proportional? 2)Find your distance from school fro

    asked on October 11, 2015
  91. Chemistry

    Complete and balance the reactions A) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→

    asked on June 3, 2014
  92. Physics/Calculus

    It takes a force of 21,714lb to compress a coil spring assembly on a New York City Transit Authority subway car from its height of 8in to its fully compressed height of 5in. A. What is the assemblys force constant? B. How much work does it take to compress

    asked on May 2, 2014
  93. Physics

    For a given initial projectile speed Vo, calculate what launch angle A gives the longest range R. Show your work, don't just quote a number.

    asked on February 17, 2014
  94. MATH

    Mrs Lim is 41 years old and her daughter is 14 years old. How many years ago was Mrs Lim four times as old as her daughter?

    asked on January 26, 2014
  95. chemistry

    A 25.00 mL solution of potassium nitrate (KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to 1.000 103 mL. The concentration of the final solution is 0.00421 M. Calculate the concentration of the original solution.

    asked on October 1, 2012
  96. business and stats

    What type of data is the projected return on an investment? Qualitative , continous, attribute,discrete or none of the above

    asked on August 31, 2011
  97. Algebra

    compound inequality write the solution set using interval notation and graph -7x+1>=15 or 5x+3>=-17 -1 -1 -3 -3 -7x/-7>=14/-7 5x/5>=-20/5 x>=-2 x>=-4 {-2,sideways8) {-4,sideways8) On my graph I have a { at -2 Does someone know how to do this?

    asked on March 21, 2008
  98. History

    1.Which is an effect of deforestation? A. soil erosion B. air pollution C. water pollution D. earthquakes 2.Which of the following is a reason so many people have migrated from Middle America to other regions? A. They dislike the region's climate. B. They

    asked on October 29, 2018
  99. English

    A typical research-based paper contains an introduction with a thesis, a body in which the paragraphs begin with topic sentences, a conclusion, and a references page. True False I say True. Please check my work.

    asked on February 11, 2017
  100. English

    Revise the following sentence to include gender neutral pronouns. Change any words necessary. A writer must include research to ensure the reader understands his point. I need help with this one.

    asked on February 4, 2017


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