Popular questions and responses by Kevin
  1. Statistics

    The Jones family was one of the first to come to the U.S. They had 9 children. Assuming that the probability of a child being a girl is .5, find the probability that the Jones family had at least 5 girls.

    asked on October 1, 2017
  2. Chemistry

    For the reaction HCONH2(g) -->

    asked on May 30, 2018
  3. geometry

    Can someone check my work please? What is the area of the figure below? 18 in² 30 in² 36 in² (my choice) 60 in² What is the area of the figure below? 31.5 m² 63 m² (my choice) 84 m² 126 m² What is the value of h? 9.6 units 26.7 units (my choice) 48

    asked on March 30, 2012
  4. Physics

    An electron is projected with an initial speed of (1.6x10^6 m/s) into the uniform field between two parallel plates. Assume that the field between the plates is uniform and directed vertically downward, and that the field outside the plates is zero. The

    asked on February 5, 2013
  5. physics

    A motorist drives along a straight road at a constant speed of 15.0 m/s. just as she passes a parked police officer,the officer starts to accelerate at 2.00 m/s^2 to overtake her. assuming the officer maintains this acceleration, a) determine the time it

    asked on January 17, 2011
  6. Calculus

    find the area of the region inside the limacon r= 8 + 4sin(theta) HElp!! if you can show steps, i'd be greatful

    asked on June 2, 2014
  7. Geometry

    A surveyor sights the far bank of a river at an angle of 110˚ to the near bank. She then moves 75 feet upriver and sights the same point on the far bank of the river at an angle of 150˚. What is the shortest distance across the river?

    asked on March 4, 2019
  8. Math

    When Sarah takes the bus to work, the trip takes 30 minutes. When she takes the train to work, the trip takes 20 minutes. The average speed to the train is 15 mph faster than the speed of the bus. Find the distance to work.

    asked on May 9, 2013
  9. geometry

    The trapezoids are similar. The area of the smaller trapezoid is 564m^2. Find the area of the larger trapezoid to the nearest whole number. The smaaler trapezoid is 24m, and the larger trapezoid is 57m. Possible answers: 576m^2--3,249m^2--3,181m^2--14m^2

    asked on April 8, 2012
  10. psychology

    People have claimed that Jamie’s paintings have given them the blues. Clearly this cannot be entirely correct, since many of Jamie’s paintings contain no blue at all. The argument above is flawed because the author:

    asked on July 9, 2015
  11. Social studies help PLEASE

    Which of the following factors helped trade to thrive during the Roman empire? Select all that apply. A. peace throughout the empire B. a shared religion throughout the empire

    asked on September 14, 2018
  12. Chemistry

    The molarity of concentrated HCl purchased for laboratory use is approximately 12.1 M. How many milliliters of this reagent should be diluted to 1.000 L to make 0.100 M HCl?

    asked on January 19, 2016
  13. goemetry

    The pentagons below are similar. The area of the smaller pentagon is 30m^2. What is the area of the larger pentagon in m^2? Small pentagon is 4m and the larger one is 10m

    asked on April 8, 2012
  14. Algebra

    James walked 212 miles in 23 of an hour. What was his average speed, in miles per hour?

    asked on November 21, 2015
  15. Physics

    A 90 kg halfback runs north and is tackled by a 120 kg opponent running south at 4 m/s. The collision is perfectly inelastic. Just after the tackle, both players move at a velocity of 2 m/s north. Calculate the velocity of the 90 kg player just before the

    asked on February 6, 2010
  16. physics

    A cyclist is at rest at a traffic light. When the light turns green, he begins accelerating at 2.13 m/s2. How many seconds after the light turns green does he reach a cruising speed of 5.05 m/s?

    asked on August 22, 2015
  17. physics

    A soccer ball travelling at 15 m/s [E] bounces off of a goal post and ends up moving 12 m/s [S 30¡Æ E]. If the ball was in contact with the post for 0.10 seconds, calculate the acceleration of the ball.

    asked on June 27, 2014
  18. english

    The shed held a (motley) supply of gardening tools. choose the letter of the word or phrase that best matches the () word outdated decomposing varied (my choice) small please help small

    asked on April 13, 2012
  19. math

    in the sequence 2,6,10,... what term has a value of 106?

    asked on June 24, 2018
  20. algebra 2b

    A simple random sample of 50 adults was surveyed, and it was found that the mean amount of time that they spend surfing the Internet per day is 54.2 minutes, with a standard deviation of 14.0 minutes. What is the 99% confidence interval (z-score = 2.58)

    asked on May 17, 2016
  21. Chemistry

    If a 45.3-g sample of potassium nitrate is dissolved in enough water to make 225 mL of solution, what will be the molarity?

    asked on February 2, 2012
  22. Algebra 2

    A country's population in 1991 was 15 million. In 2001 it was 16 million. Estimate the population in 2005 using exponential growth formula. Round your answer to the nearest million.

    asked on July 29, 2011

    Crimini Foods is offered a $400,000 line of credit for six months at an APR of 10%. This loan has a loan origination fee of 2%. What is the actual six-month interest rate paid, expressed as an EAR

    asked on November 30, 2010
  24. physics

    three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)

    asked on September 25, 2010
  25. math

    There are 8 singers competing at a talent show. In how many different orders can the singer appear?

    asked on April 26, 2008
  26. Math

    A cotton reel has a diameter of 3cm. 91 metres of cotton goes around it. How many times does the cotton go around the reel? And give your answer to the nearest ten

    asked on September 28, 2016
  27. Spanish

    ESTRUCTURA | 13.1 The subjunctive with verbs of emotion Emociones Completa cada oración con la forma correcta del verbo apropiado de la lista. Usa cada palabra sólo una vez The words in () are my guess. I need help with clarification and spelling

    asked on July 3, 2012
  28. chemistry Molarity

    You have 353 mL of a 1.25 M potassium Chloride solution, but you need to make a 0.50 M potassium Chloride solution. How many milliliters of water must you add to the original 1.25 M solution to make the 0.50 M potassium Chloride solution

    asked on December 11, 2010
  29. Chemistry: Equilbrium

    How does adding NH3 to the reaction below affect the equilibrium of the reaction? N2(g) + 3H2(g) 2NH3(g) Increasing the amount of NH3 will make Q larger than K. A net reaction occurs in the direction to increase NH3, or the forward reaction. Increasing the

    asked on April 18, 2018
  30. Physics

    A car comes to a bridge during a storm and finds the bridge washed out. The driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 19.5m above the river, while the opposite side is a mere 1.6m above the

    asked on March 7, 2015
  31. physics

    A 900kg car strikes a huge spring at a speed of 22m/s, compressing the spring 4.0m How long is the car in contact with the spring before it bounces off in the opposite direction? I found the spring constant to be 27225, which i know is right, but am having

    asked on July 29, 2014
  32. psychology

    humanistic therapy acknowledge unconscious forces and --- as a source of personal difficulties environment negative thoughts genetics psychosis please help

    asked on April 16, 2012
  33. physics

    hey you guys , i reay appreciate it if you guys help me out . Q: a vector is a physica quantity that has which of the following properties ( can be more than one) a)magnitude b)color c)speed d)direction

    asked on April 12, 2012
  34. English

    What is the tense of the underlined verb in the following sentence? "I will be studying his painting techniques this summer." present emphatic present perfect progressive future progressive present progressive under lined verb ( will be studying)

    asked on January 9, 2012

    Carborundum Metals issues commercial paper with a face value of $1,000,000 and a maturity of three months. Carborundum receives net proceeds of $992,000 when it sells the paper. If the prime rate is 8% APR compounded quarterly, how much savings in interest

    asked on November 30, 2010
  36. Chemistry

    A reaction is said to be diffusion controlled when it occurs as fast as the reactants diffuse through the solution. The following is an example of a diffusion controlled reaction. The rate constant for this reaction is 1.4x1011 M-1s-1 at 25oC and the

    asked on May 19, 2009
  37. math

    Draw a line that goes through point B. Draw a line that intersects the first line, but not at point B. Measure the distance of point B to the intersection. On the second line, draw point B′ that is the same distance from the intersection as point B.

    asked on December 10, 2019
  38. Chemistry: Equilibrium

    What is the significance of a very large Kp value on the equilibrium concentration of H2 in the reaction: 2H2(g) + O2(g) ->2H2O(g)?

    asked on April 18, 2018
  39. projectile motion physics

    Imagine the ball on the left is given a nonzero initial speed in the horizontal direction, while the ball on the right continues to fall with zero initial velocity. What horizontal speed vx must the ball on the left start with so that it hits the ground at

    asked on March 8, 2015
  40. Microeconomics

    Suppose that the price of product X rises by 20 percent and the quantity supplied of X increases by 15 percent. The coefficient of price elasticity of supply for good X is?

    asked on February 26, 2014
  41. statistics

    Suppose that the test scores for a college entrance exam are normally distributed with a mean of 450 and a standard deviation of 100. If a student is selected at random what is the probability that the student will score above 600?

    asked on April 24, 2013
  42. Algebra

    Jamie ran two laps around a track in 99 s. How long did it take him to run each lap if he ran the first lap at 8.5 m/s and the second at 8.0 m/s?

    asked on November 16, 2012
  43. earth

    About how fast will it be traveling on average? Assume that its trajectory is close to a straight line. Give your answer in {\rm AU/yr} and in {\rm km/hr}.

    asked on May 1, 2012
  44. grammar punctuation

    Fine the error in punctuation or capitalization 1. "After you've rested," Frank said, "please help me move these boxes." "Can we wait until later?" asked Emily. "I have a lot of homework." "It won't take very long." replied Frank. (my choice) Emily told

    asked on April 18, 2012
  45. Chemistry

    Would you expect PbCl2 to dissolve in dilute HNO3(aq)? Explain in terms of solubility (Ksp)/equilibrium?

    asked on April 1, 2012
  46. Chemistry

    Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage

    asked on January 9, 2011
  47. Physics

    Four identical charges (+1.6 ìC each) are brought from infinity and fixed to a straight line. Each charge is 0.36 m from the next. Determine the electric potential energy of this group. i placed the charges as follow q1 q2 q 3 q4 and used q1 as the

    asked on September 21, 2006
  48. chemistry

    2. Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g) + 3H2(g) à 2NH3(g) o a. How many moles of H2 are needed to react with 1.0 mol of N2? o b. How many moles of N2 reacted if 0.60 mol of NH3 is produced? o c. How many moles of NH3 are

    asked on December 5, 2018
  49. Chemistry

    In a titration experiment, 15.0 mL of 0.10 M Ba(OH)2 is required to titrate a 10.0 mL of an unknown solution of HNO3. Calculate the concentration of the HNO3 solution using the data. 2HNO3 + Ba(OH)2 ® Ba(NO3)2 + 2H2O

    asked on April 18, 2018
  50. Geometry

    1. If line JK is perpendicular to line XY at its midpoint M, which statement is true? a) JX = KY b) JX = KX c) JM = KM d) JX = JY Is it c? 2. What information is needed to conclude that line EF is the bisector of ∠DEG? a) m∠DEF = m∠DEG b) m∠FEG =

    asked on December 2, 2017
  51. Calculus

    If θ is an acute angle and tan(θ)=5/12, then sin(θ)=??

    asked on August 28, 2016
  52. Calculus

    Sketch the region enclosed by the curves given below. Decide whether to integrate with respect to x or y. Then find the area of the region. y=4cos(x),y=4−8x/π. I thought it was the integral of 4cos(x)- the integral of 4- 8x/π on the interval 0 to π/2.

    asked on April 27, 2016
  53. Chemistry

    what is the oxidation number of Chlorine in KCIO4???

    asked on February 26, 2016
  54. sociology

    Studies show that people from higher socioeconomic backgrounds tend to live longer and report feeling healthier than people from the lower classes. What are some explanations for this phenomenon? please help

    asked on July 28, 2015
  55. Statistics

    A 95% confidence level for the difference between u1 and u2 runs from -2 to +6. From this we can infer that a. u1 is probably greater than u2. b. u1 is probably less than u2. c. there may be no difference at all between u1 and u2. d. the difference between

    asked on April 30, 2014
  56. Algebra

    A test consist of 15 multiple choice questions, 12 true-false questions and 10 fill in the bland questions. you got 8 questions wrong. what percent of the answers were correct?

    asked on May 8, 2013
  57. Service management

    An outpatient clinic has kept a record of walk-in patients during the past year. The table below shows the expected number of walk-ins by day of the week: The clinic has a staff of five physicians, and each can examine 15 patients a day on average. a. What

    asked on May 8, 2013
  58. Algebra 2

    A culture started with 2,000 bacteria. After 6 hours, it grew to 2,200 bacteria. Predict how many bacteria will be present after 12 hours. Round to the nearest whole number.

    asked on May 7, 2013
  59. Math

    Optimization Problem A right circular cylindrical can of volume 128tπ cm^3 is to be manufactured by a company to store their newest kind of soup. They want to minimize the surface area of the can to keep costs down. What are the dimensions of the can with

    asked on March 15, 2013
  60. Spanish

    13.2 The subjunctive with doubt, disbelief, and denial Completar Completa cada oración con la forma correcta del verbo apropiado de la lista. word bank haber ir llegar querer resolver ser 1. No creo que el gobierno el problema de la contaminación

    asked on July 3, 2012
  61. psuchology

    Currently there are --- types of cognitive therapy in common practice. 2 4 6 cognitive therapy is rarely used today please help

    asked on April 16, 2012
  62. physics

    If a simple machine provides an increased output force, what happens to the output distance? Can someone please help

    asked on April 11, 2012
  63. geometry

    Find the area of the rhombus. Leave your answer in simpliest radical form. Looks like kite the left sied top corner is 60 degrees and the bottom right corner is 6. Possible answers are: 12sqrt3--36sqrt6--72--72sqrt3 Could someone please help.

    asked on April 8, 2012
  64. grammar

    Can someone please check my work? Thank you. Which of the style guides is most focused on professionals who are writing articles for publication? MLA APA Chicago (my choice Which of the style guides no longer recommends citing URLs? MLA APA (my choice)

    asked on March 30, 2012
  65. physics

    Josh starts his sled at the top of a 2.0 m-high hill that has a constant slope of 25 degrees . After reaching the bottom, he slides across a horizontal patch of snow. The hill is frictionless, but the coefficient of kinetic friction between his sled and

    asked on March 7, 2012
  66. Chemistry

    So if i want to write the conjugate base for NH3, NH3 NH2 + H(+)

    asked on October 17, 2011
  67. chemistry

    A 1.00 mol sample of N2O4 (g) is placed in a 10.0 L vessel and allowed to reach equilibrium accourding to the equation N2O4(g) 2NO2(g) K = .0004 Calculate the equilibrium concentrations of N2O4(g) and NO2(g)

    asked on September 19, 2011
  68. chemistery

    how many grams of O2 will it take to Oxidize 88 grams of C3H8 to CO and H2O

    asked on April 29, 2011
  69. Physics

    A nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 ´ 10‑6 W‑m. What is the resistance per unit length of this wire?

    asked on February 23, 2011
  70. mat h

    ms. buxx invested a total of $2000 in two savings accounts. The first account pays 3% interest per year and the second account pays 5% interest per yera. If the interest from both accounts totals $84 per yera, how much is invested in each account?

    asked on January 17, 2011
  71. ChemistryDrBob222

    Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage

    asked on January 13, 2011
  72. Algebra

    a rectangle with perimeter of 198 cm is divided into 5 congruent rectangles. What is the perimeter of one of the five congruent rectangles? i got the expression 5w + 4L = 198 the rectangle has two smaller rectangle on the top facing horizontally on the top

    asked on October 14, 2010
  73. Math

    How would you work this... You are facing north. You turn 270 degrees counterclockwise. Which direction are you facing? Is it West? You start out at 90 and go from there? I don't know...

    asked on February 10, 2010
  74. physics

    The plates of a parallel plate capacitor each have an area of 0.40 m2 and are separated by a distance of 0.02 m. They are charged until the potential difference between the plates is 3000 V. The charged capacitor is then isolated. How much work is required

    asked on October 12, 2006
  75. physics

    1) A parallel plate capacitor has a potential difference between its plates of 1.2 V and a plate separation distance of 2.0 mm. What is the magnitude of the electric field if a material that has a dielectric constant of 3.3 is inserted between the plates?

    asked on October 9, 2006
  76. physics

    2) A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 8.6 x 10^-23 kg·m/s from 2.4 x 10^-23 kg·m/s in a time of 5.7 x 10^-6 s. What is the magnitude of the electric

    asked on September 14, 2006
  77. chem

    For the reaction below, Kc = 0.154 at 2000 K. 2 CH4(g) ⇌ C2H2(g) + 3 H2(g) A 0.750 L equilibrium mixture at 2000 K contains 0.650 mol each of CH4(g) and H2(g). What is the equilibrium concentration of C2H2(g)?

    asked on March 9, 2020
  78. Algebra

    Dan is choosing between two exercise routines. In routine 1, he burns 20 calories walking. He then runs at a rate that burns 10.5 calories per minute. In routine 2, he burns 39 calories walking. He then runs at a rate that burns 5.75 calories per minute.

    asked on September 13, 2019
  79. Sociology

    Describe the demographic characteristics of the poor in the United States. What are some possible explanations for this distribution?

    asked on May 31, 2018
  80. Chemistry

    A 1.50 kg sample of a metal sample absorbs 43.5 kJ of heat, resulting in a Temperature rise of 65.0 °C. What is the specific heat capacity of the metal? M=1.50kG Q=43.5kJ dT=65C

    asked on April 20, 2018
  81. Algebra

    A rectangle's width is 6 inches less than its length. If it's area is 216 square inches find the dimensions of the rectangle. Write an equation and solve

    asked on March 28, 2017
  82. Math

    You do not have enough 6-inch beads to make the rope, so you will use 10-inch beads instead. Write and solve an inequality that represents the number of 10-inch beads that you can use.

    asked on December 2, 2016
  83. math

    A cylindrical tin of diameter 9cm and height 224cm is half filled with water.Find the volume of water in the tin.

    asked on September 8, 2016
  84. Physics/Science

    How much heat must be removed from 15.0g of water at 10°C to become ice at 0°C?

    asked on August 13, 2016
  85. Physics

    In the Biomedical and Physical Sciences building at MSU there are 135 steps from the ground floor to the sixth floor. Each step is 16.0 cm tall. It takes 5 minutes and 40 seconds for a person with a mass of 63.9 kg to walk all the way up. How much work did

    asked on April 19, 2016
  86. Physics

    Find the change in the force of gravity between two planets when the distance between them is decreased by a factor of 4.7

    asked on March 9, 2016
  87. Chemistry

    Calculate the molarity of 3 drops (0.15mL) of a 0.5M Na3PO4 solution after adding 15 drops (.75mL) of water. (Presume drops are the same size, one drop = 0.05mL)((Presume volumes are additive)) So far I've figured .15g Na3PO4/163.94g/mol Na3PO4 =

    asked on March 8, 2016
  88. chemistry

    Stoichiometrics: a 36 grams sample of calcium hydroxide is allowed to react with 40.5 grams of phosphoric acid according to the following reaction. 3Ca(OH)2 + 2H3PO4 = Ca3(PO4)2 + 6H2O how many grams of calcium phosphate are produced? how many moles of

    asked on December 5, 2015
  89. math sqrt root

    1) x¡Ô2x + 2¡Ô2x^3 + 2x^2/¡Ô2x Ans 4x¡Ô2x 2) (1/2)^1/3 Ans 3¡Ô1/2 = 3¡Ô4 /2 3) ¡Ô2/3 Ans ¡Ô6/3 4) 3¡Ô2/3 Ans 3¡Ô18/3 5) ¡Ô2 + 1/¡Ô2 Ans 3¡Ô2/2 Please help I really don't know how to simplify.

    asked on August 18, 2015
  90. science

    A force of 16.0 newtons is sufficient to set a box that is at rest into motion. If the coefficient of static friction is 0.380, what is the normal force acting on the box?

    asked on June 24, 2015
  91. Physics

    A 130kg mail bag hangs by a vertical rope 3.9m long. A postal worker then displaces the bag to a position 2.2m sideways from its original position, always keeping the rope taut.

    asked on March 21, 2015
  92. Root Words

    Which of the following root words means “more than one”? A. Junct- B. Ambi- C. Ject- D. Terr- B?

    asked on September 3, 2014
  93. Definitions

    A smaller group of people within a larger group A. Culture B. subculture C. Demography D. Population None of the definitions say anything like the question please help

    asked on September 1, 2014
  94. Definitions

    People joined together in business. A. Proprietorship B. Ownership C. Partnership D. Investment I got C

    asked on September 1, 2014
  95. Algebra

    Jan can run at 7.5 m/s and Mary at 8.0 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?

    asked on November 16, 2012
  96. chemistry

    In part B of my question, I was asked calculate the number of atoms in 0.615 mol of 13C (mass number of this Carbon is 13). I received the correct answer of 3.70E23 atoms. However, I do not know how to do Part C of my question, which asks "Based on your

    asked on September 16, 2012
  97. Physics

    Which of the following best describes kinematics? a) Kinematics is a part of mechanics that involves the description of motion. b) Kinematics is the branch of physics that deals with the motion of objects and the action of forces on the objects.

    asked on September 14, 2012
  98. Physics

    Suppose that an environmental study determines that a town produces approximately 2,000 lb of trash each day. The study group decides to convert their findings to SI units, using the conversion 1 lb = 0.4536 kg. They report that the town produces 907.2 kg

    asked on September 6, 2012
  99. area hexagon

    Find the area of a regular hexagon with an apothem 10.4 yards long and a side 12 yards long. Please help

    asked on April 16, 2012
  100. raiots and perimeter

    you have to figures that are similar, large one is 28yds, and the smaller one is 8yds. give the ratio of the perimeter and the ratio of the areas of the larger figure to the small one. Can someone please help not just answer but explain

    asked on April 16, 2012


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