Popular questions and responses by Jack
  1. Lang ARts

    hat fact best explains why it is significant that Angelou's narrative is set in 1940? In 1940, the United States was not yet involved in World War II. In 1940, segregation of blacks and whites was still the norm. In 1940, most high school students did not

    asked on August 15, 2013
  2. Career

    Which of the following are the top two job expectations of people who career plan Hours** Benefits Type of work** coworkers security Which of the following is an example of a job that would supply a good that would meet a need? limo driver** actor farmer

    asked on September 4, 2018
  3. probability

    Humans carry two copies of most genes. Individuals that carry two identical variants of a gene are called homozygous whereas those that carry two different variants are called heterozygous. For example, if there are two possible variants labelled A and a,

    asked on August 1, 2020
  4. math

    write 480 in a) 1 significant figure b) 2 significant figures c) 3 significant figures d) 4 significant figures

    asked on August 23, 2010
  5. Math

    The average weight of 3 boys is 53 pounds. Not one of these boys weighs less than 51 pounds. What is the maximum possible weight in pounds, of any one boy?

    asked on June 8, 2014
  6. spanish

    I need hep unscrambling these words can anyone help? 1)GJAUDRO 2)ARBCUE 3)EUPQIO 4)MCLICISO 5)PEASRA 6)NEIST

    asked on January 31, 2014
  7. Chemistry

    "Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion [cation/anion] is most likely in each case?" Followed by a short list of elements such as Na and Sr. What I'm wondering is how I'm to know? I can't find

    asked on October 18, 2007
  8. critical thinking test AU

    1. Question : The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses: Student Answer:

    asked on March 12, 2012
  9. Physics

    A block slides down a frictionless plane having an inclination of θ = 13.2°. The block starts from rest at the top, and the length of the incline is 1.70 m. -> Find the acceleration of the block. (m/s2 down the incline) -> Find its speed when it reaches

    asked on October 2, 2016
  10. chemistry

    Please help with this problem =) The combustion of liquid chloroethylene, C2H3Cl, yields carbon dioxide, steam, and hydrogen chloride gas. I. write a balanced equation for the reaction (I sorta get this part) II. How many moles of oxygen are required to

    asked on October 9, 2008
  11. calculus

    Evaluate the Riemann sum for f(x) = 5 −1/2x, 2 ≤ x ≤ 14,with six subintervals, taking the sample points to be left endpoints. I don't understand is the answer 18?

    asked on July 15, 2020
  12. Math

    A pair of fair dice is rolled. Let E denote the event that the number landing uppermost on the first die is a 3, and let F denote the event that the sum of the numbers landing uppermost is 6. Determine whether E and F are independent events

    asked on August 15, 2010
  13. Algebra

    For how many two-digit prime numbers is the sum of its digits 8?

    asked on April 14, 2011
  14. Math

    There are 12 animals in a farm.some are cows the rest are chickens.there are 28 animals legs in all.how many cows are there? how many chickens are there ?

    asked on August 26, 2016
  15. math

    which has greater volume? a) 1.0 kg of feathers or 1.0 kg of lead b) 100 g of gold or 100 g of water c) 1.0 L of copper or 1.0 L or mercury

    asked on August 23, 2010
  16. Chemistry

    If the amount of mercury in a polluted lake is 0.4 µg Hg/mL, what is the total mass in kilograms of mercury in the lake? (The lake has a surface area of 100mi^2 and an average depth of 20 ft.) I'll probably be able to solve this once I know what it's

    asked on October 12, 2007
  17. Chemistry

    Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. Is Al2(CO3)3 ==> Al2O3 + CO2 the right equation? If so, how do you balance this equation?

    asked on March 1, 2010
  18. mathematics

    I have a very important test (mathematics). I need help with quadratic equations and trapezoid calculator, I can't understand them and in my textbook is very very poorly explained. Can somebody give me a link for a tutorial or write something please?

    asked on July 27, 2020
  19. Math

    Given that a and b are nonnegative real numbers such that a+2b=60, what is the largest possible value of ab? And If f(x) = x^2 - 3x + 4, find the value of f(sqrt3 - sqrt2). And The median of {20, x, 15, 30, 25} is 0.4 less than the mean. If x is a whole

    asked on July 6, 2017
  20. probability

    a bowl contains 8 marbles, numbered 1 to 8. Find the probability that in a randomly selected arrangement of 3 marbles, without replacement. largest # = 5 how to do?

    asked on August 12, 2020
  21. Chemistry

    Consider the combustion of ethane: 2C2H6(g)+7O2(g)-->4CO2(g)+6H2O(g) If the ethane is burning at the rate of 0.7 mol/L × s, at what rates are and being produced?

    asked on May 14, 2015
  22. EDTECH

    UNIT 4 lesson 4 All of this information is part of a ___ in a database. a. record b. row c. column d. field What other information do you need to add to complete the database above? a. cell fill color b. fields c. field names d. borders

    asked on November 13, 2014
  23. College Algebra

    Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in

    asked on July 9, 2013
  24. chemistry

    2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions are best balanced by the

    asked on March 22, 2013
  25. chem

    For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around that atom. (a) As in AsO43- number: arrangement: linear bent trigonal planar square planar tetrahedral (b) Se in SeO42- number:

    asked on March 20, 2013
  26. Chemistry

    which has the highest lattice energy BaO or SrO

    asked on February 23, 2010
  27. algebra

    nestor has nickels, dimes, and quarters amounting to $1.85. if he has twice as many dimes as quarters, and the number of nickels is two less than twice the number of dimes, how many quarters does he have?

    asked on June 16, 2017
  28. algebra

    if log xy=6 and log x/y=2. solve for x and y

    asked on June 16, 2017
  29. Science

    What is the total displacement of two trips one 10km north and the other 24km east

    asked on September 30, 2015
  30. physics

    in a experiment to measure the speed of sound in glass, a pulse of sound is sent into a glass rod, 14 m in length. the reflected sound is detected after 5.6 ms (0.0056 s). calculate the speed of sound in glass.

    asked on January 19, 2014
  31. physics

    A 4.0 kg object is lifted 1.5 m. (a) how much work is done against the earth's gravity ? (b) repeat if the object is lowered insteadof lifted

    asked on March 19, 2012
  32. Chemistry

    Calculate the enthalpy change for the reaction: Zn (s) + S (s) + 2 O2 (g) → ZnSO4 (s) ΔH = ? kJ by using the following data: Zn (s) + S (s) → ZnS (s) ΔH = –206.0 kJ ZnS (s) + 2 O2 (g) → ZnSO4 (s) ΔH = –776.8 kJ My answer is -982.8 but I'm not

    asked on January 30, 2020
  33. phsics

    throughout a time interval, while the speed of a particle increases as it moves along the x-axis, its velocity and acceleration might be: a) positive and negative B) negative and negative c) negative and positive D) negative and zero E) positive and zero

    asked on September 2, 2013
  34. social studies

    What are some advantages and disadvantages of a reorganized family

    asked on February 11, 2015
  35. physics

    A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 19.0m/s when the hand is 1.50m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of

    asked on September 26, 2014
  36. chem

    At 20 degrees celsius the vapor pressure of dry ice is 56.5atm. If 10 g of dry ice (solid CO2) is placed in an evacuated 0.25 L chamber at a constant temperature of 20 degrees celsius, will all of the solid sublime? Is the answer no? I don't know if this

    asked on January 22, 2011
  37. Math

    d+g/h for d =35, g = 19, and h=6

    asked on November 6, 2017
  38. Math

    Write an algebraic expression for the sum of 3 Coins and c Coins

    asked on October 25, 2017
  39. trigonometry

    the angle of elevation of a tower at place A south of it is 30degrees and at B west of A and a distance of 50 from it the angle of elevation is 18degrees, determined the height of the tower

    asked on June 5, 2017
  40. chem

    For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around that atom. (a) As in AsO43- number: arrangement: linear bent trigonal planar square planar tetrahedral (b) Se in SeO42- number:

    asked on March 19, 2013
  41. chemistry

    A 15.0ml sample of NaCL solution has a mass of 15.78g.after the NaCL solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. calculate the following concentrations for the %(m/m), % (m/v), molarity (M)

    asked on November 1, 2012
  42. Chemistry

    In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation. 2Al + 3Cl2 ==> 2AlCl3 a)Identify the limiting reagent for the reaction. b)Calculate the number of moles or

    asked on April 5, 2010
  43. math

    I need some help. My teacher gave me a worksheet "Why does a poor man drink Coffee?" written by Pizzazz. Does anyone know how to do this sheet?

    asked on April 24, 2008
  44. Physics

    A ball is thrown horizontally from the top of a building. The ball is thrown with a horizontal speed of 8.2 ms^-1. The side of the building is vertical. At point P on the path of the ball, the ball is distance x from the building and is moving at an angle

    asked on September 2, 2019
  45. algebra

    the sum of ages of maria and anna is 35. when maria was two-thirds her present age and anna was three fourths of her present ages, the sum of their ages was 25. how old is maria now?

    asked on June 16, 2017
  46. Physics. PLEASE HELP!

    two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of magnitude F is applied to the block of mass m1. if P is the magnitude of the contact force between the blocks, what are the net

    asked on October 11, 2012
  47. math

    A piano manufacturer has a daily fixed cost of $1200 and a marginal cost of $1500 per piano. Find the cost C(x) of manufacturing x pianos in onde day. Use your function to answer the following questions: a)On a given day, what is the cost of manufacturing

    asked on September 15, 2012
  48. math

    The sum of two numbers is 10.The sum of their squares is 52.Find the numbers.

    asked on February 2, 2012
  49. mathmath

    A study conducted by the Metro Housing Agency in a midwestern city revealed the information below concerning the age distribution of renters in the city. (Round your answers to four decimal places.) Age Adult Population, % Group Who Are Renters, % 21-44 53

    asked on October 15, 2010
  50. chemistry

    Write Skeleton equations for these reactions. A) Heating Copper(II) sulfide in the Presence of diatomic oxygen produces pure copper and sulfur dioxide gas. B)When heated, baking soda (Sodium hydrogen carbonate) decomposes to form the products sodium

    asked on February 28, 2010
  51. trigonometry

    a triangle has sides equal to 68 cm, 77 cm and 75 cm, respectively. find the area of the escribed circle tangent to the shortest side of the triangle.

    asked on June 17, 2017
  52. Algebra

    Angle A is three times the measure of angle B. The sum of their measures is 128 degrees. Angle B is (x + 2) degrees. Find the value of x.

    asked on October 30, 2014
  53. Chemistry

    some of the acetic acid splashed out the beaker when you dropped the tablets into the acetic acid. How would this affect your measurement? Would your final calculated mass of sodium bicarbonate in the tablet be artificially high or low as a result of this

    asked on November 21, 2013
  54. Chemistry

    the density of H2 gas in a rigid container is 0.117 g/L at 55 C. what is the pressure of hydrogen in the flask if it is heated to 125 C?

    asked on November 5, 2012
  55. calculus

    A trough is 16 ft long and its ends have the shape of isosceles triangles that are 5 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 11 ft3/min, how fast is the water level rising when the water is 7

    asked on October 13, 2011
  56. math

    when 0.0709 is rounded to the nearest thousandth, the result is A. 0.0709 B. 0.0701 C. 0.070 D. 0.071 is D correct?

    asked on July 23, 2018
  57. Physics

    The pupil of an eagle’s eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. From a distance of 182 m, the eagle sees them as one unresolved object and dives toward them at a speed of 15 m/s. Assume that the eagle’s eye detects light

    asked on April 9, 2018
  58. art

    keeping facial features in proportion means

    asked on October 3, 2017
  59. Algebra 1

    A student reads an average of 34 pages per day. The number of pages she reads per day varies from the average by up to 8 pages. a. Write an absolute value inequality that represents the range of the number of pages she reads per day. b. Solve your

    asked on September 25, 2014
  60. Math

    How many tenths are there in 4/5?

    asked on September 21, 2014
  61. physics

    A river flows with a uniform velocity v. A person in a motorboat travels 1.11km upstream, at which time she passes a log floating by. Always with the same throttle setting, the boater continues to travel upstream for another 58.8min and then returns

    asked on September 14, 2014
  62. statistics

    A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined

    asked on December 11, 2012
  63. Chemistry

    An experiment that led to the formation of the new field of organic chemistry involved the synthesis of urea, CN2H4O, by the controlled reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g)= CN2H4O(s) + H2O(l) What is the theoretical yield of urea when

    asked on November 30, 2012
  64. @elena

    i noticed you helped a lot of people with their questions with physics ? can you hep me out please ? In putting, the force with which a golfer strikes a ball is planned so that the ball will stop within some small distance of the cup, say 2.00m long or

    asked on April 15, 2012
  65. english

    consonant patterns wr,kn,st,mb,gn directions read each word and idenify the consonant pattern with the silent letter. on the lines,write two more words that have the same silent consonant pattern. underline the consonant pattern in each word you write. 1-

    asked on March 2, 2012


    asked on September 28, 2011
  67. chemistry

    Consider the following unbalanced reaction: Fe2O3 (s) + CO (g) --> Fe (s) + CO2 (g) How many moles of carbon dioxide are produced per mole of iron (III) oxide reacted.

    asked on September 20, 2011
  68. physics

    a student standing on the roof of a 50 meter high building kicks a stone at a horizontal speed of 4 meters per second, how much time is required for the stone to reach the level ground below?

    asked on January 16, 2011
  69. physics

    A ball is launched from ground level at 31.8 m/s at an angle of 35° above the horizontal. How far does it go before it is at ground level again? A) 14 m B) 21 m C) 43 m D) 86 m E) 97 m

    asked on June 10, 2010
  70. Chemistry

    How many grams of K2SO4 would you need to prepare 1500 g of 5.0% K2SO4 (m/m) solution?

    asked on April 26, 2010
  71. Accounting

    The cost principle requires that when assets are acquired, they be recorded at

    asked on April 12, 2010
  72. Physics

    An object traveling at 5.0 m/s East has a mass of 6.0 kg. What is the magnitude of the object's momentum? I am not sure what the formula is for this one!

    asked on October 11, 2009
  73. math

    You have to answer 2 essay questions for an exam. There are 8 essays to choose from. How many different groups of 2 essays could you possibly choose?

    asked on July 18, 2018
  74. Physics

    In Young's experiment a mixture of orange light (611 nm) and blue light (471 nm) shines on the double slit. The centers of the first-order bright blue fringes lie at the outer edges of a screen that is located 0.452 m away from the slits. However, the

    asked on April 9, 2018
  75. math

    The inside of a trough is shaped like a rectangular solid, 25 feet long, 6 inches wide, and filled with water to a depth of 35 inches. If we wish to raise the depth of the water to 38 inches, how much water must be let into the tank? a. 25/96 cubic foot b.

    asked on June 10, 2017
  76. Math

    why inscribed quadrilaterals have opposite angles that are supplementary?

    asked on June 7, 2017
  77. math

    Juan is cutting lumber into one half foot lenths.How many one half foot lengths will he get from an 8 foot long piece of lumber?

    asked on May 2, 2017
  78. algebra

    Using factoring and zero-product property solve: 4a^2 -10a +6=0 Thank's a lot.

    asked on December 26, 2016
  79. algebra

    Please show me how to put this number in scientific notation. 3.000052 Thank you.I appreciate your help.

    asked on December 14, 2016
  80. physics

    Imagine a parallel universe in which the electric force has the same properties as in our universe but there is no gravity. In this parallel universe, the sun carries charge Q, the earth carries charge −Q, and the electric attraction between them keeps

    asked on January 31, 2016
  81. math

    Boris has a coin and a number cube. The number cube is labeled 1-6. He flips the coin once and rolls the number cube once. What is the probability that the coin lands tails up and the cube lands on a even number? A. 2/3 B. 1/4 C. 1/12 D. 1/6 How do i solve

    asked on April 9, 2015
  82. Math

    Eighty metres of fencing are available to enclose a rectangular area. What are the dimensions that enclose the max area. What is max area?

    asked on January 2, 2015
  83. Physics

    A football is kicked at ground level with a speed of 17.9m/s at an angle of 39.0∘ to the horizontal. How much later does it hit the ground?

    asked on February 5, 2014
  84. programming MIPS ask 3

    Write a MIPS assembly language program for the following for loop: Pseudocode: int x; # for(x=10; x>0; x--){ # printf("x=%d", 4x); #} In the program use the slt or slti instruction and sll

    asked on November 11, 2012
  85. Math

    If line g passes through point (2, 2) and is perpendicular to the line h, then what is the equation of line g? With h passing through two points (1, 2) and (3, 6)

    asked on January 25, 2011
  86. chemistry

    The pH of a solution that contains 0.818 M acetic acid (Ka = 1.76 x 10-5) and 0.172 M sodium acetate is __________. The Ka of acetic acid is 1.76 × 10-5.

    asked on November 23, 2010
  87. chemistry

    The solubility of lead (II) chloride (PbCl2) is 1.6 x 10^-2 M. What is the Ksp of PbCl2?

    asked on November 22, 2010
  88. Chemistry

    Complete and balance this equation for a combination reaction. Be + O2 ==> Would it be Be + O2 ==> BeO2 ? or... 2Be + O2 ==> 2BeO ? Why??

    asked on March 14, 2010
  89. Chemistry

    Write and balance equations for the following reactions. A)Iron metal and Chlorine gas react to form solid iron(III) chloride. B)Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. C)Solid magnesium reacts with aqueous

    asked on February 28, 2010
  90. government

    If the issue that colonists would have coming out of the Articles of Confederation, what impact whould the Articles of Confederation, what impact whould those issues have on the designing of the constitution? If the issue that colonists would have coming

    asked on October 17, 2006
  91. Math

    x^2+9x+20=0 Solve using quadratic formula

    asked on April 9, 2020
  92. Chemistry

    How much CaCl2.6H2O and water must be weighed out to make 100 g of a solution that is 5% CaCl2 by mass? Thanks to anyone who explains this to me

    asked on January 26, 2020
  93. music

    1. the step pattern for a minor scale is a. W-H-W-W-H-W-W b. H-H-W-W-W-H-W c. W-W-H-H-W-W-W d. W-H-H-W-W-H-W 2. a sharp in a scale a. lowers the note by one half step b. raises the note by one whole step c. raises the note by one half step d. lowers the

    asked on November 4, 2019
  94. Career

    Please check my answer In which of the following would a person works as a business administrator be interested? 2 points A. convincing someone to purchase a project** B planning employee work schedules C. typing memos and letters D. writing facts,

    asked on September 14, 2018
  95. Math

    Write and expression to represent the area of a trapezoid, which can be found by multiplying the height of the trapezoid by half of the sum of base1 and base2.

    asked on August 28, 2018
  96. math

    Fiona is repairing the wiring on a radio broadcast tower. She is in the basket of the repair truck 40m from the tower. if she looks up at an angle of 42° she can see the top of the tower. She can see the base if she looks down at an angle of 32°. How

    asked on June 13, 2018
  97. Science

    Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens. A. Integumentary system B. Nervous system C. circulatory system D. endocrine system I think it is C

    asked on November 16, 2017
  98. math / science

    a bacteria population doubles every eight minutes. if the population begins with one cell how long will it take to grow to 512 cells?

    asked on October 11, 2017
  99. trigonometry

    the angle of elevation of the top of the tower from the foot of a flagpole is twice the angle of elevation of the top of the flagpole from the foot of the tower. at the point midway between the tower and the flagpole, the angles of elevation to their tops

    asked on June 17, 2017
  100. Math (Physics)

    What is the resistance of a 3.9-m length of copper wire 1.1 mm in diameter? The resistivity of copper is 1.68×10^−8Ω⋅m. R=______ Ω Please Help. I've been at this for hours.

    asked on April 25, 2017


  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14