Popular questions and responses by Kelly
  1. Algebra

    Which equation represents "fifteen more than r is sixty-one? a. r + 61 = 15 b. r + 15 = 61 c. r - 15 = 61 d. r + 61 = 15 I think its b or c because b is 46 and c is 76

    asked on August 26, 2015
  2. College Chemistry

    I balanced the equation: HBr(aq) +NH3(aq)->NH4Br I need to find the ionic equation and the net ionic equation

    asked on October 3, 2010
  3. math

    For his exercise today, Josh plans to both run and swim. Let r be the number of laps he runs and let s be the number of laps he swims. Each lap he runs takes him 4 minutes, and each lap he swims takes him 3 minutes. He wants to exercise for at least 30

    asked on September 25, 2016
  4. Calculus

    The equation of motion of a particle is s = t3 − 12t, where s is in meters and t is in seconds. For the velocity function, I got v(t)=3t^2-12 and for acceleration, a(t)=6t. The final question is: Find the acceleration when the velocity is 0. How do I do

    asked on September 29, 2015
  5. Redox Reaction

    In an acidic solution, manganese(II) ion is oxidized to permanganate ion by bismuthate ion, BiO3-. In the reaction, BiO3- is reduced to Bi3+. How many milligrams of NaBiO3 are needed to oxidize the manganese in 30.2 mg of manganese(II) sulfate?

    asked on April 19, 2015
  6. chemistry

    Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, NH4Br, and aqueous lead(II) acetate, Pb(C2H3O2). Enter the balanced net ionic equation, including phases, for this reaction.

    asked on October 23, 2012
  7. chemistry

    Will sodium sulfide and iron II sulfate form a precipitate? if so what would the reaction look like?

    asked on December 12, 2010
  8. Mathematics

    On a certain​ exam, Tony corrected 10 papers and found the mean for his group to be 80. Alice corrected the remaining 50 papers and found that the mean for her group was 90. What is the mean of the combined group of 60 ​students?

    asked on July 25, 2020
  9. chemistry

    3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3 standard flask. 25cm3 of this solution required 40.00cm3 of 0.01M HCl for neutralization. What is the percentage by weight of K2CO3 in the mixture? (K = 39, O = 16,

    asked on June 28, 2018
  10. Stats.

    Find the standard normal area for each of the following, showing your reasoning clearly. a. P(1.22

    asked on April 11, 2014
  11. Calculus Practice Problems

    A filter filled with liquid is in the shape of a vertex-down cone with a height of 12 inches and a diameter of 18 inches at its open (upper) end. If the liquid drips out the bottom of the filter at the constant rate of 3 cubic inches per second, how fast

    asked on October 16, 2013
  12. chemistry

    Find the concentration of Cu+ in equilibrium with CuBr(s) and 0.10 M Br-.

    asked on September 11, 2011
  13. CAL

    Consider the function y = 3x5 – 25x3 + 60x + 1. Find the absolute maximum value of y on the interval [0, 3]. What do you get I got -322, but I'm not 100% on how to find the absolute maximum.. so is that right?

    asked on December 9, 2014
  14. Math

    A rock is thrown upward with a velocity of 12 meters per sec from the top of a 25 meter high cliff and it misses on it's way back down. When will the rock be 3 meters from water

    asked on September 1, 2015
  15. College Chemistry-Please help me

    I need to find the ionic equation of: 3Ba(OH)2(aq)+2H3PO4(aq)->Ba3(PO4)2+6H20(l) I'm totally lost on this question

    asked on October 4, 2010
  16. MATH

    What is the estimated perimeter of an ellipse if the major axis has a length of 15 ft and the minor axis has a length of 7.5 ft?

    asked on October 7, 2016
  17. Chemistry

    Write chemical formulas for the compounds formed by the following positive and negative ions: Ba2+ and NO3-, Al3+ and Co3, and K+ and PO43-

    asked on July 30, 2016
  18. Math

    You need to put carpet in a rectangular room that measures 12 feet by 17 feet at a cost of $27.50 per square yard. Assuming that you can buy precisely the amount of carpet you need, how much will the carpet for the room cost? I came up with $1870.00 but

    asked on October 27, 2013
  19. physics

    The amplitude of an oscillator decreases to 69.0% of its initial value in 15.5s. a) What is the value of the time constant?

    asked on December 1, 2009
  20. Statistics

    The Weight of a small Starbucks coffee is normally distributed random variable with a mean of 360 grams and a standard deviation of 9 grams. Find the weight that corresponds to each event. a. highest 10% b. highest 50% c. highest 5% D. highest 80% e.

    asked on April 11, 2014
  21. Physics

    A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 32 N. The coefficient of static friction between his

    asked on February 15, 2010
  22. Math- Algebra

    A mother wants to invest $15000 for her children's education. She invest a portion of the money in a bank certificate of deposit which earns 4 percent and the remainder in a savings bond which earns 7 percent. If the total interest earned after a year is

    asked on February 5, 2018
  23. Algebra

    Joylin receives a $50 gift card for the local movie theater for her birthday. She uses the card to purchase tickets and snacks for her family. If Joylin spends $6 more on tickets than she does on snacks, how much does Joylin spend on tickets?

    asked on July 3, 2014
  24. math

    The distance between city A and city B is 500 miles. On a certain wall map, this is represented by a length of 2.3 feet. On the map, how many feet would there be between city C and city D, two cities that are actually 800 miles apart? On the map, city C

    asked on September 7, 2012
  25. chemistry

    how would you prepare 1.00 L of 0.50 M solution of NiCl2 from the salt nicl2·6H2O? thanks :)

    asked on August 24, 2010
  26. chemistry

    an aspirin tablet contains 5.00X10^2 mg of active ingredient. how many grams of ap of active ingredient does it contain

    asked on July 5, 2010
  27. Physics

    A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 220N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (magnintude and direction)? Please show me how to do

    asked on January 2, 2007
  28. Accounts

    Assuming a proprietorship, partnership, and corporation earns equal amount of income and it is distributed evenly among owners, the amount collected by government toward tax will be: Select one: a. highest for proprietorship. b. highest for corporation. c.

    asked on April 28, 2018
  29. Math

    Hi can someone please help me? A recent study gave the information shown in the table about ages of children receiving toys. The percentages represent all toys sold. Age (years) Percentage of Toys 2 and under 3-5 6-9 10-12 13 and over 17% 19% 24% 13% 27%

    asked on December 14, 2016
  30. Calc

    The maker of an automobile advertises that it takes 13 seconds to accelerate from 25 kilometers per hour to 90 kilometers per hour. Assuming constant acceleration, compute the following. The acceleration in m/s^2 The distance the car travels during the 13

    asked on November 18, 2016
  31. college algebra

    The height of a projectile fired upward is given by the formula s = v0t – 16t2, where s is the height, v0 is the initial velocity and t is the time. Find the times at which a projectile with an initial velocity of 128 ft/s will be 144 ft above the

    asked on April 8, 2014
  32. physics

    Two point charges are fixed on the y axis: a negative point charge q1 = -23 µC at y1 = +0.23 m and a positive point charge q2 at y2 = +0.33 m. A third point charge q = +7.8 µC is fixed at the origin. The net electrostatic force exerted on the charge q by

    asked on March 29, 2012
  33. algebra

    If there are 8 red disks numbered 1 through 8, and 6 yellow disks numbered 9 through 14 placed in a box. Find the probability of selecting a red disk numbered 3.

    asked on November 14, 2010
  34. Math

    PQR ~ STU. PQ = 12cm and ST = 9cm. The area of STU is 72 cm². Find the area of PQR.

    asked on July 28, 2010
  35. Chemistry

    Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.

    asked on June 7, 2010
  36. Math

    name the 2 digit multiple of 8 who digits add up to 10

    asked on June 10, 2008
  37. Algebra

    The length of a rectangle is twice the width. The area is 578 yd.^2. Find the length and width.

    asked on November 21, 2011
  38. math helper plese

    2 isosceles triangles have the same height. The slopes of the sides of triangle A are double the slopes of the corresponding sides of triangle B. How do the lengths of their bases compare? A. The base of A is quadruple that of B. The base of A is double

    asked on January 17, 2011
  39. chemistry

    Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is 0.4 mg Hg/mL, what is the total

    asked on September 10, 2010
  40. English

    Analyze the childhood world of Jem, Scout, and Dill and their relationship with Boo Radley in Part One? Help me?

    asked on October 18, 2008
  41. Math

    The city council gave a questionnaire to its citizens, asking them to rank their priorities for next year's budget. People were asked to rank the following four choices: (P)olice, (R)oads, (S)chools, and (T)rash removal. The results are summarized in the

    asked on April 3, 2017
  42. Calc

    Use upper and lower sums to approximate the area of the region using the given number of subintervals (of equal width). (Round your answers to three decimal places.) y = 5/x

    asked on October 29, 2016
  43. Math

    if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left

    asked on April 2, 2013
  44. physics

    An automobile traveling 95 overtakes a 1.10--long train traveling in the same direction on a track parallel to the road. Q1: If the train's speed is 75 , how long does it take the car to pass it Q2:How far will the car have traveled in this time? Q3:What

    asked on April 8, 2012
  45. Algebra

    The flower garden has the shape of a right triangle. 5ft of a perennial border forms the hypotenuse of the triangle, and one leg is 1ft longer than the other leg.Find the lengths of the legs.

    asked on November 9, 2011
  46. Physics

    Two students are on a balcony 19.6 m above the street. One student throws a ball (ball 1) vertically downward at 15.8 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the

    asked on May 13, 2011
  47. Math

    My son's math homework asks him to find each product by factoring the tens. 6 x 2, 6 x 20 and 60 x 20. There is no explaination in the book..can you help?

    asked on January 4, 2011
  48. College Chemistry

    How many milliliters of a 0.200M AgNO3 solution are required to preccipitate most of the Cl^- ions from a solution containing 0.855 g of NaCl?

    asked on September 27, 2010
  49. physics

    Using dimensional analysis, which one of the following equations is dimensionally correct? ( a → m/s2, v → m/s, x → m , t → s)

    asked on September 17, 2010
  50. Chemistry

    Which pair of compounds will form a solution?Benzene (C6H6) and hexane (C6H14)Na2SO4 and benzene (C6H6)NaCl and hexane (C6H14)H2O and CCl4More than one of the combinations above will form solutions.

    asked on April 19, 2016
  51. Chemistry

    Consider the chemical equation. 2H2 + O2 -> 2H2O What is the percent yield of H2O if 87.0 g of H2O is produced by combining 95.0 g of O2 and 11.0 g of H2? a 56.5% b 59.0% c 88.5% d 99.7%

    asked on March 23, 2016
  52. Algebra

    Find the domain of the function. (Write your answer using interval notation.) sqrt(x)/ (4x^2 + 3x − 1) If you set the bottom equal to zero, I got that x can't be -1 or 1/4. But I'm not sure if that's right, or how to write the answer in interval

    asked on September 12, 2015
  53. Chemistry

    Acetylene(C2H2) torches are used in welding. How much heat (in kJ) evolves when 2.0L of C2H2 (d=1.0967kg/m3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is C2H2(g)+52O2(g)→2CO2(g)+H2O(l), ΔH∘=−1299.5kJ

    asked on March 24, 2014
  54. college chemistry

    How many total moles of ions are released when the following sample dissolves completely in water: 5.15x10^-3 g Ca(NO3)2

    asked on September 26, 2010
  55. Chemistry

    What volume of 0.123 M AgNO3(aq) is needed to form 0.657 g of AgCl(s)? 0.564 mL. 18.6 mL. 37.2 mL. 1.77 L.

    asked on June 12, 2010
  56. business math

    translate : nine times the product of three and a number

    asked on September 18, 2017
  57. Chemistry

    In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction?

    asked on July 6, 2016
  58. Calculus

    Find the limit as x approaches infinity. sqrt(81x^2 + x)− 9x. I've worked this two different ways and have gotten 0 and 1/9, neither of which is the right answer according to the homework system??

    asked on September 14, 2015
  59. Chemistry

    Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is based on a comparison with the combustion properties of isooctane. Gasoline usually contains an isomer of isooctane called tetramethylbutane (C8H18), which has an

    asked on July 9, 2013
  60. Chemistry

    the reaction of 6.62g of carbon with excess oxygen yields 13.40g of CO2. what is the percent yield of this reaction

    asked on May 18, 2013
  61. physics

    A 1500kg car is approaching the hill shown in the figure at 15.0 m/s when it suddenly runs out of gas. Part A What is the car's speed after coasting down the other side?

    asked on November 26, 2012
  62. japenese

    what does furasosu mean?

    asked on May 22, 2010
  63. Statistics

    Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent

    asked on November 28, 2009
  64. World Liturature

    Explain the significance of the title Quality by John Galsworthy

    asked on November 15, 2009
  65. MATH

    If you roll a 6 sided dice 6 times, what is the best prediction possible for the number of times you will roll a two? A) 6 B) 1 C) 2 D) 0

    asked on April 20, 2016
  66. English

    Which of the following did NOT contribute to the Harlem Renaissance? A.The Emancipation Proclamation. B. By 1930, the population of African Americans in Harlem grew to over 200,000.

    asked on February 26, 2016
  67. Algebra

    I have another one What is the value of 42-2(3x5+1)? I thought you worked the parentheses first which would be 16, then subtract 42 from 2 and you get 39, you would then multiply 16x39 and you would get 624. But the answers I have to choose from are 8, 1,

    asked on August 26, 2015
  68. Physics

    A watermelon seed has the following coordinates: x = -8.7 m, y = 1.6 m, and z = 0 m. Find its position vector as (a) a magnitude and (b) an angle relative to the positive direction of the x axis. If the seed is moved to the xyz coordinates ( 3.4 m, 0 m, 0

    asked on February 2, 2015
  69. Science

    List these from broadest to specific Organism Ecosystem Population Community Where would ecosystem fall Population, community, organism

    asked on November 10, 2014
  70. Calculus Area between curves

    Consider the area between the graphs x+6y=8 and x+8=y2. This area can be computed in two different ways using integrals First of all it can be computed as a sum of two integrals where a= , b=, c= and f(x)= g(x)= I found a, but not b or c. I can't seem to

    asked on November 24, 2013
  71. Chemistry

    Calculate the theoretical mass percent of oxygen in KClO3. here is the my mass percentage of 02 25gKCl03/30.0gKCl03=0.61%02.

    asked on September 7, 2013
  72. Chemistry

    a .6800g sample of carboxylic acid is burned in oxygen, producing 1.212 g of CO2 and .4991 g of H2O. determine the empirical formula of the carboxylic acid

    asked on May 18, 2013
  73. English

    Choose the correct form for each phrase. 1. the budget for this month this months budget this month's budget this months' budget this months's budget 2. the schedule of the doctor the doctor's schedule the doctors schedule the doctors' schedule the

    asked on May 16, 2013
  74. Physical Science

    Find the change in the force of gravity between two planets when their masses remain the same but the distance between them is increased by 10 times.

    asked on February 27, 2013
  75. statistics

    A food snack manu. samples 15 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 10.0 and the sample standard deviation is .15, find the 95% confidence interval estimate for the true mean.

    asked on January 3, 2013
  76. Physics

    a mouse pushes a piece of cheese with a mass of 6.4 g for a distance of 75 cm over the frictionless surface of an air hockey table. He exerts a constant 0.5 N force as he does so. If the cheese starts from rest, what is it's final velocity?

    asked on December 5, 2012
  77. math

    The sum of the measures of the angles of any triangle is 180 degrees. In triangle abc, angles a and b have the same measure, while the measure of angle c is 78 degrees larger than each of a and b. What are the measures of the three angles? angle a is

    asked on September 7, 2012
  78. Algebra

    A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 100 ft of fence? What should the dimensions of the garden be to this given area? The maximum

    asked on November 21, 2011
  79. physics

    A shell is fired from a gun with a muzzle velocity of 466m/s at an angle of 57.4 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is

    asked on October 10, 2011
  80. college physics

    The energy difference between states A and B is twice the energy difference between states B and C (C > B > A). In a transition (quantum jump) from C to B, an electron emits a photon of wavelength 300 nm. What is the wavelength emitted when the photon

    asked on April 26, 2010
  81. Physics

    Figure 8-33 shows a 1.50 kg block at rest on a ramp of height h. When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 10.0 cm that has a

    asked on March 30, 2010
  82. Algebra

    Find the sum of the first four terms of the geometric sequence with a = -3 and r = 3. I have NO idea how to attempt to solve this. I do not want an answer just instuctions. Thanks

    asked on January 11, 2010
  83. Math

    What percent of students in the college are history majors (to the nearest tenth of a percent)? 200 students major in math 300 students major in history 400 major in english 150 major in science 175 major in other Total number of students divided by the

    asked on October 21, 2009
  84. Word Problem

    Use a proportion to solve the problem. On Anne's bicycle, the ratio of pedal turns to rear-wheel turns in second gear is 4 to 7. If her rear wheel turns 994 times per mile, how many times does she turn the pedal in one mile? Express your answer as an

    asked on October 21, 2009
  85. chemistry-check over work

    2C6H5Cl(chlorobenzene)+C2HOCl3(chloral)=C14H9Cl5(DDT)+H2O in a gov. lab 1142 g of chlorobenzene is reacted with 485 g of chloral. a). what mass of DDT is formed? 1166.179 g of C14H9Cl5 b). which reactant is limiting?C2HOCl3 which reactant is in

    asked on March 7, 2008
  86. accounting

    identify three external users of accounting information and indicate two questions they might seek to answer through accounting information.

    asked on February 15, 2008
  87. physics

    what is the final temperature when a 3.0 kg gold bar at 99 degrees is dropped into a .22 kg of water at 25 degrees

    asked on February 5, 2008
  88. Calculus

    How many 2-digit numbers can be formed using the digits 1,2,3,4,5,6,7,8,9 and 0? No digit can be used more than once

    asked on December 10, 2007
  89. calculus

    Use the even odd properties to find the exact value of the expression. It may be helpful to draw the unit circle graph sin(-pi)

    asked on November 18, 2007
  90. Math

    Suppose that there are two types of tickets to a show Advanced and same day. The combined cost of one advance ticket and one same day ticket is 55. for one performance 25 advanced tickets and 40 same day tickets were sold the total amount paid for the

    asked on April 5, 2020
  91. English

    As a senior prefect, write a speech on your principal senth forth party.

    asked on February 1, 2020
  92. Math

    Write 1+iroot 3 and 1-iroot3 in trig form and simplify (1+iroot3)^9 +(1-iroot3)^9 in x+iy form.

    asked on November 20, 2019
  93. chemistry

    When 3,3-dimethyl-2-butanone is reduced, the product is a. 3,3-dimethyl-2-butanene b. 3,3-dimethyl-2-butana c.3,3-dimethyl-2-butanol d. 3,3-dimethyl-2-butananoic acid

    asked on March 29, 2018
  94. math

    solve log9(x-y)=log3(x+y

    asked on January 17, 2018
  95. Chemistry

    If you start with 4.00 moles of C3H8 (propane) and 4.00 moles of O2, how many moles of carbon dioxide can be produced?

    asked on July 29, 2016
  96. math

    How many 1oz bottles will this solution fill.

    asked on June 15, 2016
  97. math

    What is the 20th term of the sequence that begins with −2, 4, -8, 16 ANSWER CHOICES: A)2,097,152 B)524,288 C)-524,288 D)1,048,576

    asked on May 17, 2016
  98. english

    Which of the following did NOT contribute to the Harlem Renaissance? A.The Emancipation Proclamation. B. By 1930, the population of African Americans in Harlem grew to over 200,000. C.F. Scott Fitzgerald

    asked on February 26, 2016
  99. math(epidemiology)

    A population of 100 healthy men was followed for the development of prostate cancer. After being followed for 5 years, 20 men developed prostate cancer. Ten other men were followed for 1 year and then were lost to follow-up. The remaining men who never

    asked on January 18, 2016
  100. Intro to Undergraduate Studies

    Does the sentences below need to be cited? Why or why not? Bill Gates is the founder of Microsoft. Students who studied two hours a day did 25% better in the final exam.

    asked on October 6, 2015


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