Popular questions and responses by Kay
  1. HELLP!! calculus

    A piece of wire 25 m long is cut into two pieces. One piece is bent into a square and the other is bent into a circle. (a) How much of the wire should go to the square to maximize the total area enclosed by both figures? (b) how much of the wire should go

    asked on November 23, 2011
  2. statistics

    for a standard normal curve, find the z-score that separates the bottom 30% from the top 70%

    asked on November 5, 2008
  3. Chemistry

    The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.

    asked on March 18, 2014
  4. SAT Math Question?

    Lindsey and Stephen work at a factory. Lindsey can complete one full job in three hours, and Stephen can complete the same job in five hours. If Lindsey and Stephen work together on the job for one hour, then how long, in minutes, will it take Stephen to

    asked on December 28, 2016
  5. CHEM 2: Boiling Point

    Which Aqueous solution has the highest normal boiling point? a.) 0.1 m NaCl b.) 0.1 m C2H5OH c.) 0.1 m CaCl2 d.) They all have the same boiling point. I think that the answer is D, the all have the same boiling point. Is this correct? Because Delta T=

    asked on June 12, 2016
  6. Trig

    Use the half angle formula to find the exact value of tan 7 pie/8

    asked on September 13, 2007
  7. Algebra

    The formula I = PRT where I = Interest, P = principal, R = rate, and T = time is used to calculate the amount of simple interest earned. Solve this formula for T.

    asked on October 22, 2016
  8. chemistry

    When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:

    asked on March 3, 2014
  9. math

    Can you please check my work. A particle is moving with the given data. Find the position of the particle. a(t) = cos(t) + sin(t) s(0) = 2 v(0) = 6 a(t) = cos(t) + sin(t) v(t) = sin(t) - cos(t) + C s(t) = -cos(t) - sin(t) + Cx + D 6 = v(0) = sin(0) -cos(0)

    asked on June 23, 2011
  10. math

    In how many ways can a teacher arrange 6 students in the front row of a classroom with a total of 20 students

    asked on January 27, 2012
  11. Stats

    Health insurers are beginning to offer telemedicine services online that replace the common office visit. Wellpoint provides a video service that allows subscribers to connect with a physician online and receive prescribed treatments (Bloomberg

    asked on April 6, 2019
  12. SAT Math Question?

    Which of the following accurately defines all possible values of p-q if 15≤p≤30 and 7≤q≤19? The answer is -4≤(p-q)≤23, but I'm not sure how. Thank you!

    asked on December 22, 2016
  13. English

    What's a good thesis statement for the book hunger games ?

    asked on April 28, 2011
  14. spanish

    select the correct form for the verb escribir. 1. Dudaba que el principe___ cuentos para ninos. My answer escribia b. escribe c. escribiera d. escribio 2. Elena___ a una conferencia anoches. a. asistio my answer b. asistia c. asiste d. ha asistido 3.

    asked on May 8, 2010
  15. geometry

    A rectangle has a length of 9inches and a height of 1.5 feet. What is the area of the rectangle in square inches?

    asked on March 13, 2012
  16. physics

    Calculate the density of the balls in this area. Each ball has a mass of 1 kg. Estimate the area taken up by the whole structure by looking in the Parameters Palette for the diameter of the balls and multiplying this by the number of balls on each side.

    asked on November 13, 2011
  17. physics

    A reflecting telescope is used to observe two distant point sources that are 3.50 m apart with light of wavelength 600 nm. The telescope's mirror has a radius of 5.0 cm . What is the maximum distance in meters at which the two sources may be distinguished?

    asked on June 22, 2016
  18. Phychology

    Which of these guests would require service to their car? A young mother with her baby A man in his workout wear A couple with three bags of groceries An elderly person with one bag of groceries All of the above

    asked on December 30, 2015
  19. Statistics

    32% of adult internet users have purchased products or services online. For a random sampling of 200 adult users, find the mean, variance and standard deviation for the number who have purchased goods or services online?

    asked on March 17, 2013
  20. physics

    In a tennis serve, a 0.070 kg ball can be accelerated from rest to 35 m/sec over a distance of 0.80 m. find the magnitude of the average force exerted by the racket on the ball during the serve

    asked on December 7, 2010
  21. Math

    Find the angle elevation of the top of a flagpole 31.9m high from a point 55m away on level ground

    asked on March 4, 2020
  22. Physic

    Show the equation that 100g of 100C steam will completely melt 800g of 0C ice.

    asked on November 9, 2014
  23. algebra

    $400 invested at 3% compounded daily after a period of 3 years=$?(round to nearest cent)

    asked on July 27, 2012
  24. Chemistry

    CCl3F boils at 23.8 degrees Celcius, and its molar heat of vaporization is 24.8 kJ/mol. Calculate the molar entropy of vaporization of CCl3F (l)

    asked on January 31, 2012
  25. Calculus

    I need help setting up the equation. The portion of the graph y = ex between x = 0 and x = ln 3 is rotated around the y axis to form a container. The container is filled with water. Use n = 4 subintervals and midpoints to approximate the work required to

    asked on July 22, 2011
  26. Math

    If a bag contains 50 marbles with 28 red ones and 22 blue ones. A marble is picked at random from the bag.what is the probability of picking a red marble after a blue marble was picked first?

    asked on March 3, 2011
  27. Chem

    What is the empirical formula of a compound that contains 27.0%S, 13.4%O,and 59.6%Cl by mass?

    asked on December 8, 2010
  28. Medical Coding

    What are the CPT and ICD codes for this case? Gladys Swain slipped from a sidewalk curb and twisted her right ankle. Because of the severe pain she was suffering and the inability to bear weight on the foot, she sought treatment at her neighborhood

    asked on June 3, 2010
  29. math. logs

    anyone know how to solve this step by step? e^(3ln2)

    asked on September 28, 2008
  30. Physics

    A helicopter rises vertically with a constant upward acceleration of 0.40 m/s2 . As it passes an altitude of 20 m, a wrench slips out the door. A) How soon does the wrench hit the ground? B) At what speed does the wrench hit the ground?

    asked on January 21, 2017
  31. algebra

    Yoko runs 3 miles in 25 minutes. At the same rate, how many miles would she run in 20 minutes?

    asked on March 15, 2015
  32. Chemistry

    net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq

    asked on March 1, 2014
  33. physics

    Calculate the pressure exerted halfway up a 30-ft tank. The liquid level in the tank is 22 ft. Specific gravity is 0.79. Vapor pressure at 100 degrees Fahrenheit equals 12.2 psi. The tank operates at 36 psi.

    asked on September 16, 2019
  34. Biology

    An organism that is eukaryotic, multicellular, and lacks a cell wall would be classified in which kingdom. Protista Fungi Animalia Archaebacteria Eubacteria I really don't know which ones it is I tried 13 times. Choose all the applies.

    asked on March 18, 2019
  35. german

    1. Ich ___ warmes Wetter gern. ( 2 points ) A. bist B. habe C. bin D. hat 2. Wur ___ Sport gern. ( 2 points ) A. habe B. habt C. hast D. haben 3. ___ du Schnee gern? ( 2 points ) A. hast B. haben C. hat D. habt 4. Herr Barker ___ Amerikaner. ( 2 points )

    asked on December 11, 2017
  36. Physics

    Sam pushes crates starting form rest across the floor of his classroom for 3 s with a net force as shown above. For each crate, rank the following from greatest to least: A 100N/30kg, B 75N/20kg C 50N/10kg 1. Impulse delivered 2. Change in momentum 3.

    asked on November 12, 2014
  37. Macro Consumption Question

    (Simple Spending Multiplier) For each of the following values for the MPC (marginal propensity to consume), determine the size of the simple spending multiplier and the total change in real GDP demanded following a $10 billion decrease in spending: a. MPC

    asked on April 16, 2013
  38. physics

    A document ys to be reproduced using a duplicating camera where should the document be placed in order to obtain an exact copy

    asked on February 24, 2013
  39. math

    I am a two-digit number less than 40. You say me when you count by fives. The sum of my digits is 7. What number am I?

    asked on September 25, 2012
  40. Probability

    Jolie has 6 quarters, 6 dimes, 4 nickels, and 10 pennies in her coin purse. If two coins are drawn at random without replacement, what is the probability of drawing a quarter on the first draw and a nickel on the second draw?

    asked on March 30, 2012
  41. algebra 1b

    the speed of a passenger train is 18mph faster than the speed of a freight train. The passenger train travels 310 miles in the same time it takes the freight train to travel 220 miles. Find the speed of each train passenger train mph and freight train mph

    asked on March 21, 2012
  42. Criminal Justice

    Compare and contrast state and local programs as they contribute to successful reintegration and transition services for women in the criminal justice system

    asked on October 9, 2011
  43. Math

    Solve for L L^2*pi*a- 2L*pi*x + pi*x^2=0

    asked on July 23, 2011
  44. chemistry

    If you add 50 g of sylvite in 100 ml of water at 60 ° C, the resulting solution will she unsaturated, saturated or supersaturated? You prepare a solution and you add 50 g of potassium nitrate to 100 ml of water at 50 ° C. What type of solution are you

    asked on February 8, 2011
  45. Math

    Find the number of degrees in an interior angle, a central angle, and an exterior angle of a regular hexagon.

    asked on October 7, 2009
  46. Chem - IUPAC naming system

    I don't know how to name this. Help? You'll have to write out what I'm describing because I can't set it up in this. In a straight line, there is (1)CH3 - (2)C - (3)CH2 - (4)C - (5)CH - (6)CH3. On #2, there is CH3 and CH3. On #4, there is CH3 CH3 and CH3.

    asked on May 13, 2009
  47. Anatomy and Physiology

    Which one of the following groups of structures is involved in regulating calcium levels? A. Parathyroid, thymus, intestines, kidneys, and bones. B. Parathyroid, bones, intestines, kidnesy, and adrenal glands. C. Thyroid, parathyroid, bones, intestines,

    asked on February 21, 2009
  48. Science

    Which part of the electromagnetic spectrum is divided into seven ranges of wavelengths and is the part visible to the human eye? A Television waves B Visible light C infrared light D telemetry waves I believe it's visible light?

    asked on February 18, 2020
  49. Earth Science

    Help? Having studied the data for patterns and trends, you should now be able to draw some conclusions about how knowing the half-life of the element Lokium would help you determine the absolute age of rock in which this element is found. In a paragraph,

    asked on September 24, 2019
  50. Chemistry

    If the pressure of the gas inside the flask were increased and the height of the column in the open-ended arm went up by 0.5mm, what would be the new pressure of the gas in the flask, in torr? ANSWER IS 807.3 TORR

    asked on January 17, 2018
  51. SAT Math

    If m percent of 50 is equal to 20 percent of n, then what is the value of m/n? Thank you!

    asked on December 23, 2016
  52. physics

    an aeroplane has a mass of 15 tonnes. At cruising speed,air flows over the top of it's wing at 150 m/s and under the wing at 120m/s. Calculate the pressure in difference between the top and the bottom of the wing and the surface area underside the wing

    asked on November 25, 2016
  53. chemistry

    Write the net ionic equation for the following molecular equation. HBr is a strong electrolyte. HClO is a weak electrolyte. KClO(aq) + HBr(aq) KBr(aq) + HClO(aq)

    asked on March 3, 2014
  54. physics

    Suppose the Earth's orbit is divided in two by its minor axis as shown in the figure. How much longer in days does the Earth spend in one half than the other? The eccentricity of an elliptical orbit is defined as e:=a/c where c is the semi-major axis and a

    asked on June 25, 2013
  55. geometry

    The measures of two consecutive angles of a parallelogram are in the Ratio 3:7. Find the measure of an acute angle of the parallelogram

    asked on March 23, 2013
  56. Maths

    L=2x-1 W=x+3 Area =294cm find length and with of rectangle

    asked on February 23, 2013
  57. chemistry

    Need to find info about chemical reaction of lemon juice and baking soda. Doing experiment where gas produced will inflate balloon hopefully. Will outcome be a lot different than if I had used vinegar?

    asked on December 7, 2012
  58. Chemistry

    If 4.02g of hydrogen and 25.0g of oxygen (at standard conditions) are reacted to form water vapor, what quantity of heat is evolved from this reaction given that standard enthalpy of formation of H2O is -242kJ/mol?

    asked on October 17, 2012
  59. algebra 1b

    it is known that making 1 lb of honey requires 20,000 trips by bees to flowers to gather nectar. How many pounds of honey would 75,000 trips produce how many pounds of honey would 75,000 trips produce.

    asked on March 21, 2012
  60. Math

    A mechanic charges $35 an hour plus parts to fix a car. If the parts cost $90 and it took 5 hours to do the job, what is the total cost of the repair?

    asked on March 13, 2012
  61. Geometry

    Given the following sets, select the statement below that is NOT true. A = {b,l,a,z,e,r}, B = {b,a,l,e}, C = {a,b,l,e}, D = {l,a,b}, E = {a,b,l} E  C E  B D  B B  C C  A I chose the last one. Did I choose correctly?

    asked on May 26, 2011
  62. Geometry

    I want to check this problem also; An elctronics store surveyed every 7th customer who came into the store for a week. Of the 350 people who responded 144 poeple watched movies on VHS tapes. 239 people watched movies on DVDs. 54 people watched movies both

    asked on May 26, 2011

    a ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes over a frictionless pulley of negligible mass. the block lies on a frictionless incline of angle theta. (a) draw the free body diagrams (b) express newton's second law

    asked on April 10, 2011
  64. geometry

    when an elephant casts a 2.5 meter shadow, a man 2 meters tall casts a 1.5 meter shadow. how tall is the elephant

    asked on February 3, 2011
  65. physics

    A mass of 0.246 kg is converted completely into energy of other forms. How much energy of other forms is produced? The speed of light is 2.99792 × 108 m/s. Answer in units of J.

    asked on March 28, 2011
  66. Chemistry

    Stoichiometry-I have the basic strategy, but am still stuck on how to do them.example...propane burns in oxygen according to the following reaction C3H8 + O2 produces CO2 + H20 a. How many moles of CO2 are formed when 2.8 g of propane reacts? b. If 0.45 g

    asked on March 1, 2010
  67. HRM/240

    letter recommending to a company's board of directors that affirmative action policies be implemented Include points supporting the recommendation and clearly address points that may be used against this recommendation. The letter must also address how

    asked on February 28, 2010
  68. Chemistry

    how do you do lewis structure? I cannot seem to understand exactly what to do.

    asked on November 10, 2009
  69. Trig help?

    The question is: State the vertical shift and the equation of the midline for y = 4cosθ-1? I have NO idea what to do here. Can someone possibly show me step by step? I am more of a visual learner, if I see something done I can usually understand it.

    asked on February 3, 2009
  70. trig

    a state trooper is hidden 30ft. from a highway. One second after a truck passes, the angle beta between the highway and the line of ovservation from the patrol car to the the truck is measured. if the speed limit is 55mph and a speeding ticket is issued

    asked on July 8, 2008
  71. physics

    im confused... how should i solve this when there is no resistivity value given? The resistance of a rod with a length of 3.0 m and diameter of 1.0 cm is 56.0 ohms. If this rod is stretch to form a wire with a diameter of 0.01 cm, what is its resistance?

    asked on May 7, 2020
  72. calculus

    Find the most general antiderivative. (Use C for the constant of integration. Remember to use absolute values where appropriate.) f '(x) = 4x^3 − 10x + 4

    asked on January 10, 2020
  73. calculus

    ABC Daycare wants to build a fence to enclose a rectangular playground. The area of the playground is 950 square feet. The fence along three of the sides costs $5 per foot and the fence along the fourth side, which will be made of brick, costs $10 per

    asked on January 10, 2020
  74. History

    Regarding colonialism,the highest rates of alcoholism, depression, poverty, and suicide are found among native Americans

    asked on August 24, 2019
  75. Chemistry

    The rate equation for the hydrolysis of sucrose to fructose and glucose is first order. After 27 minutes the sucrose concentration decreased from 0.0146M to 0.0132M. Find the rate constant K. Please help me!

    asked on April 11, 2018
  76. Trigonometry

    a 10ft ladder is resting against the wall. the ladder touches the ground 6ft away from the wall. what angle, rounded to the nearest tenth, id the bottom of the ladder making with the ground The correct answer is 53.1 degrees Can someone explain how to get

    asked on February 26, 2018
  77. physics

    The height of the Empire State building is 318.00 meters. A pebble is dropped from the top of the building, what is the stones velocity just before it strikes the ground?

    asked on February 12, 2018
  78. Math

    How to use the hundredths grids to subtract 1.65-0.98

    asked on October 4, 2017
  79. math

    On average, the earth is 93 million miles away from the center of the sun. The complete revolution around the sun takes 1 year. how fast is the earth moving in this orbit in feet per second?

    asked on August 20, 2017
  80. Physics

    After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 2.5 m/s from 1.5 m above the ground. A) How much time does it take until the book hits the floor? B) What's its velocity then?

    asked on January 21, 2017
  81. Algebra

    a submarine was cruising at a depth of 1,375 feet. The captain gave an order to climb 450 feet. Compared to sea level , find the depth of the sub

    asked on January 13, 2017
  82. SAT Math

    The function w is defined by w(x)=6+3x. If 4⋅ w(z)=96, what is the value of z? So is w(x)=w(z)?

    asked on December 29, 2016
  83. math

    33 pounds of bananas cost $163.50. how much would 18 pounds cost? how much would a one pound banana cost?

    asked on August 9, 2016
  84. Math

    Every 1 1/2 on a wilderness map represents 1 mile. If the actual distance between two likes is 10 miles how far apart are the lakes on the map?

    asked on June 23, 2016
  85. math

    Are is their a good website that has good video with precal lessons im havong difficulty with a bad teacher

    asked on January 27, 2016
  86. Psychology

    A man feels anxious and a little sick to his stomach when he walked up to the front door of his old elementary school. School had been very hard for him and he remembers feeling “stupid” a lot of the time he was in school. What is the unconditioned

    asked on January 27, 2016
  87. Algebra

    A square has an area of 49 square units. Find the sode length and perimeter of the square.

    asked on November 25, 2015
  88. Geometry

    The degree measure of the vertex angle is (3x-8). The degree measure for each base angle is (6x-41). What is the value of vertex angle?

    asked on October 21, 2015
  89. algebra

    9 balls in a hat. balls are numbered 1-9. you choose 3 balls. how many possible combinations are there?

    asked on September 13, 2015
  90. Chemistry

    when titrating 50 mL of .10M H2SO45 with .10 M NaOH, how many mL of NaOH will you have added to reach first equivalence point?

    asked on April 14, 2015
  91. Human service

    A description of how client feedback can be applied following an intervention

    asked on February 4, 2015
  92. Physic

    A penny on its side moving at speed v slides off the horizontal surface of a table a vertical distance y from the floor. a) Show that the penny lands a distance v√(2y/g) from the base of the coffee table. b) If the speed is 3.5 m/s and the coffee table

    asked on November 7, 2014
  93. sociology

    explain The impact of preventive medicine and public health

    asked on August 10, 2014
  94. math


    asked on May 6, 2014
  95. math

    there are 13 boys and 14 girls in mrs greens class if 3 of the students are absent today what is the ratio of students absent to students present?

    asked on April 19, 2014
  96. Stats

    Suppose that you are in a class of 31 students and it is assumed that approximately 10% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed. (b)

    asked on February 16, 2014
  97. Chem year one

    what is the balanced net ionic equation for the oxidation of hydrogen peroxide by permanganate ion and find out how many moles of hydrogen peroxide react with one mole of permanganate ion. would the answer be: 2MnO4^- + 6h^+ + 5H2O2 ---> 2Mn^2+ + 8H2O +

    asked on November 22, 2013
  98. Chemistry: Organic Chemistry

    Optically pure 2-octyl sulfonate, a compound with a leaving group comparable to the tosylate and mesylate groups discussed in this chapter, was treated with varying mixtures of dioxane and water as solvent. The optical purity of the resulting 2-octyl

    asked on November 5, 2013
  99. Social studies

    How was New England and the southern colonies were alike? How we're they different?

    asked on August 23, 2013
  100. Physics (help steve)

    A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions

    asked on July 9, 2013


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