Newest questions and responses by Charles
  1. social studies, slaves, industrial revolution

    Give an example of how being able to communicate over long distances would help Americans(using morse code)

    asked on February 11, 2019
  2. logarithm, precalculus, algebra 2

    how do you solve logarithms with log in the exponent?

    asked on February 11, 2019
  3. physics

    If a man weighs 600 N on the Earth, what would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2?

    asked on February 10, 2019
  4. Literature, History, Government, French

    Explain 5 measures that the government of Ghana is taking to promote science education in Ghana

    asked on November 21, 2018
  5. science

    A family in Virginia drove to California. The first day, they traveled 400 miles in 8 hours what is their velocity?

    asked on November 19, 2018
  6. English 12

    One goal of America Recycles Day is to raise awareness of the growing landfill problem. Which of these phrases is the complete infinitive phrase in the sentence?

    asked on November 6, 2018
  7. MATH

    Which ordered pairs are on the line ​ 4x−3y=84x−3y=8 ​? Select each correct answer. ​ (−1,4) ​ (1,−4/3) ​ ​ (3/2,−2/3)​ ​ (−4,−8) ​I know that one is (1,4/3) but I thought the other was (2,0) and it is not up their. Help

    asked on January 19, 2018
  8. Chem

    The brilliant color of fireworks is produced by shells containing lithium carbonate (Li2CO3) that are launched into the night sky and explode. The explosions produce enough energy to vaporize the Li2CO3 and produce excited state lithium atoms. These atoms

    asked on December 13, 2017
  9. math

    How many terms of the arithmetic sequence 88, 85, 82, . . . appear before the number -17 appears?

    asked on July 20, 2017
  10. math

    A girl starts from point A and walks 285m to B on a bearing of 078.She then walks due south to a point C which is 307m from A. What is the bearing of A from C,and what is {BC}? please i need the answer urgent ooo it is an assignment pls help me fast

    asked on May 18, 2017
  11. math

    A man walks due west for 4km. He then changes direction and walks on a bearing of 179 until he is south-west of his starting point.How far is he then from his starting point?

    asked on May 17, 2017
  12. English

    Two types of biographies are: a. Formate and genre b. Poetry and prose. c. Fiction and nonfiction. d authentic and fictionalized

    asked on May 4, 2017
  13. Chemistry

    How do you prepare 17.2cm³ of 36% conc HCL per dm³ of solution?

    asked on April 1, 2017
  14. math

    The length by the width of Roxie's photo is 24 cm long and 14 cm wide. In order to make a photo that will fit into a wallet, the photo needs to be reduced to a length of 7 cm. Determine the width of the wallet size photo.

    asked on January 30, 2017
  15. math

    The mean of Alice's last 5 math test scores is 88. The first 4 of these 5 math test scores were 87, 75, 93, and 85. What score did Alice earn on her fifth math test?

    asked on January 27, 2017
  16. Math

    A parking garage charges $2.00 to enter the garage and $1.50 an hour to park. Use the coordinate plane to graph this situation.

    asked on January 23, 2017
  17. chemistry

    a gas occupies a volume of 50.0mL at degrees Celsius and what temperature in degrees Celsius would the pressure be 101.3kPa if the volume remains constant?

    asked on December 19, 2016
  18. geometry

    Determine the Cartesian form of the equation r^2 cos theta -cos3theta

    asked on November 29, 2016
  19. Chemistry

    What is the morality of a solution prepared by dissolving 10.60g of sodium trioxocarbonate (v) in enough distilled water to obtain 250.0 ml of a solution?

    asked on November 21, 2016
  20. Physics

    A certain number of identical resistors are connected in series and their total resistance is measured. When the resistors are disconnected and re-connected in parallel, their total resistance drops to one-percent of the value measured when they were

    asked on November 7, 2016
  21. math

    two strips of fabric measure 14 2/3 inches and 20 7/8 inches in length. to form one length, the strips are sew together using 3/8 inch from each strip to make the seam. what is the final length of the fabric after the two strips are sewn together.

    asked on October 20, 2016
  22. Math

    How many times does a palindromic number appear on a 12 hour digital clock between 12 midnight and 12 noon?

    asked on October 18, 2016
  23. Chemistry

    The atomic mass of CU 63 is 62.9296 amu with a natural abudance of 0.692. The average mass of copper is 63.546amu.What is the mass of copper's other isotope?

    asked on October 9, 2016
  24. Statistics

    Bill,mary,and Joe belong to a club of nineteen people. A committee of twelve is to be selected at random from the membership. How many different arrangements are possible? How many of these committees will contain Bill,Mary, and Joe at the same time?

    asked on September 29, 2016
  25. Statistics

    Bill, Mary, and Joe belong to a club of nineteen people. A committee of twelve is to be selected at random from the membership. How many different arrangements are possible. How many of these committees will contain Bill, Mary and Joe at the same time?

    asked on September 29, 2016
  26. Statistics

    Two committees, one with six and one with seven people, are to be selected from a group of eighteen people, with no one person serving on both committees at the same time. In how many ways can this be done?

    asked on September 29, 2016
  27. Science

    A 0.5kg mass connected to a light spring of constant 20N/M occilates on a frictionless track. Calculate the total energy of the system

    asked on September 23, 2016
  28. Math

    3. The population of Columbus, Ohio, in 2014 was about 823,000. The population of the United States was about 319 million in 2014. (a) Write each population in scientific notation. (b) About how many times larger was the population of the United States

    asked on September 20, 2016
  29. probability statistics

    A jar contains 6 red, 7 white, and 7 blue marbles. If a marble chosen at random. Find the following probabilities? A)P(red) B)P(white) C)P(red or blue) D)P(red and white)

    asked on August 10, 2016
  30. math

    In isosceles right triangle ABC, point D is on hypotenuse BC such that AD is an altitude of triangle ABC and DC = 5. What is the area of triangle ABC?

    asked on July 7, 2016
  31. Chemistry

    What volume of 1.0 M NaOH must be added to 1.5 L of 1.20 M CH3COOH (ka=1.8x10^-5) to make the solution a buffer for pH 4.50? I do not understand how to determine the mols of NaOH. I tried to use the equation where: [H3O+] = ka (nHA/nA-) but it is not

    asked on April 10, 2016
  32. math

    I need help making this question into a equation? A cable television company charges $15 plus $5 each for extra services and now write an equation to show how much a person would pay for television if they had x number of extra services?

    asked on April 5, 2016
  33. chemistry

    A 0.109g sample of a pure gaseous compound occupies 112ml at 100degrees and 750torr: what is the molecular weight of the compound. ANS=(30.2g,mol). Please I need the solution

    asked on March 21, 2016
  34. Physics

    A man walks 3km E and then 4km N. What is his resultant displacement?

    asked on March 8, 2016
  35. Physics

    An airplane is heading 20degree north flying at 200km/hr relative to the air. Simultaneously the wind carries the plane 10degree, east of south at the speed of 60km/hr. (a) find the velocity of the plane relative to the ground. (b) find the component (east

    asked on March 8, 2016
  36. Physics

    Find the vector cross product of two vectors C=2i-j and D=i+2j-3k. What is the angle between the vectors

    asked on March 8, 2016
  37. Physics

    Find the magnitude of the dot product of the two vectors B=6i+j+2k, D=-1+3j. What is the angle between B and D

    asked on March 8, 2016
  38. Physics

    Consider two vectors one of magnitude 3 and the other 4 unit, which of the following is not correct? We can combine these vectors to yield a resultant of. A.7 B.5 C.1 D.0

    asked on March 8, 2016
  39. Physics

    If D=7i-3j+2k and E=4i+5j-3k. Deduce angle between D and E

    asked on March 8, 2016
  40. Physics

    If D=7i-3j+2k. Find the magnitude of D

    asked on March 8, 2016
  41. Physics

    If D=7i-3j+2k and E=4i+5j-3k. Find the scalar product of D.E

    asked on March 8, 2016
  42. Physics

    Find the sum of vectors A=5m

    asked on March 8, 2016
  43. Thermodynamic

    One mole of CO2 is to be compressed adiabatically from 1 bar and 25 C. Because of irreversibilities and poor design of the compressor the compressor work required is found to be 25 %greater than that for a well-designed (reversible) compressor. Compute the

    asked on March 8, 2016
  44. Physics

    A body is projected such that the horizontal range is twice the maximum height of projection. Find the angle of projection; and the time of flight if the velocity of projection is 5m/s

    asked on March 7, 2016
  45. Physics

    What is the total time of flight of an object projected vertically upwards with a speed of 30m/s? (g=10m/s^2

    asked on March 7, 2016
  46. physics

    the surface tension Y, of liquid depends on the density,P, acceleration of gravity,g, and the height, h. use the method of dimension to derive the actual relationship between these quantities

    asked on March 7, 2016
  47. physics

    a sphere of radius r moving with velocity v through a fluid experiences a retarding force f given by F=6r^yv^zn^x where n is the viscosity of the liquid. use the method of dimensions to find the values of x,y,and z.

    asked on March 7, 2016
  48. Physics

    A brass cube 2cm on each edge is held in the jaw of a wire with a force 1600N. By aw much is the cube compressed. (Y for brass is 9.1×10^10pa)

    asked on March 6, 2016
  49. physics

    The vertical and horizontal component of the initial velocity of a projectile are 36m/s and 64m/s. Find the initial velocity and angle inclination

    asked on March 6, 2016
  50. maths

    A contractor supplied some items to a school. The contractor's bill is shown below. If each amount includes 5% VAT calculate how much the government receives as VAT. Electrical fittings = #52 500.

    asked on March 5, 2016
  51. maths

    A rectangle of length y m and breadth 4 m less than the length. What is the perimeter??

    asked on March 4, 2016
  52. math-finance

    suppose you are offered two identical jobs: one paying a starting salary of $40,000 with yearly raises of $2,000 and one paying a starting salary of $36,000 with yearly raises of $25,000. Which job will pay more over a 10 year period? I=PRT = 40,000 x 0.05

    asked on February 26, 2016
  53. math

    How do find determine fractions from the greatest to least

    asked on February 22, 2016
  54. physcis

    a girl throws a ball vertically upward with a speed of 20 ft/sec from the roof of a building 60 ft high.(a)how long will it take the ball to reach the ground? (b)what will its speed be when it strikes the ground?

    asked on February 21, 2016
  55. math

    jane gets 1/2 of a gold star each time she helps her teacher clean up the classroom after class. How many times would Jane need to help her teacher to earn 3 whole gold stars? Draw fraction. Strips to help.

    asked on February 5, 2016
  56. Programming Logic and Design

    Design an application that accepts eight friends' first names and displays them in alphabetical order

    asked on December 3, 2015
  57. derivrtives

    Find the derivative of d^2Y/dx^2 of y=e^2t and x=cost^2 and leave your answer in terms of x and y

    asked on November 25, 2015
  58. math

    Air is pumped into a spherical balloon at the rate of 20cm^3/s^-1.find the rate of change of radius of the balloon when the radius is 6cm

    asked on November 25, 2015
  59. probability theory

    3 students; A, B and C, are in a swimming race. A and B have the same probability of winning and each is twice as likely to win as C. Find the probability that B or C wins the swimming race. 3) Given three boxes as follows: Box A contains 3 red, 2 white

    asked on November 20, 2015
  60. chem

    How would your experimental formula of magnesium chloride “MgClx” have been affected if your product was not dried completely before weighing it? Would “x” be too high or two low?

    asked on October 28, 2015
  61. Biology

    Some people experience “heartburn” when eating fatty, greasy foods (similar to the effect that is felt when eating acidic foods). Why would this occur with fats? I know fatty acids are made of carboxylic acid and if you have too much, would it make

    asked on October 27, 2015

    An automobile accident causes both the driver and passenger front airbags to deploy. a. If the vehicle travelled at a speed of 88.6 km/h is now at rest, find the change in momentum for both the 68.4 kg adult driver and the 34.2 kg child passenger. b. The

    asked on October 24, 2015
  63. Combinations and Permutations

    A committee of 3 members is selected from a club made up of 10 junior members and 20 senior members. What is the expected number of juniors in the committee?

    asked on October 4, 2015
  64. Science

    The solubility of a compound in water is 6.8g/100ml at 25°C.. Calculate the amount of water required to crystallize 10g of the compound. If the pure compound is collected at 25°C what is the maximum possible yield percent.

    asked on September 21, 2015
  65. life science

    investigation to determine whether expired air contains carbondioxide

    asked on September 6, 2015
  66. Math

    A toy company manufactures miniature cars. They sell miniature sports cars in a box. They sell 12 miniature trucks in a box. Mrs. Murphy wants to buy an equal number of sports cars and trucks for the Boys and Girls Club. What is the least number of

    asked on August 16, 2015
  67. maths

    A box contains 5 red bowls, 6 yellow bowls and 3 white bowls. If 4 bowls are randomly drawn from the box at the same time, (a)find the probability that exactly 2 red bowls are drawn; (b)find the probability that at least 2 red bowls are drawn.

    asked on July 23, 2015
  68. math

    A box contains 5 red bowls, 6 yellow bowls and 3 white bowls. If 4 bowls are randomly drawn from the box at the same time, (a)find the probability that exactly 2 red bowls are drawn; (b)find the probability that at least 2 red bowls are drawn. My work: (a)

    asked on July 22, 2015
  69. physics

    consider a vertical piston system. the piston has a 50g mass and a given radius of 3mm. what amount of pressure does the piston exert? ( use g==9.8 m/s^2 )

    asked on June 2, 2015
  70. math

    what is the surface area of a cube with sides measuring 2 inches?

    asked on May 14, 2015
  71. Managerial Economics

    1. A principal-agent problems occur when managerial decisions are not consistent with the firm's shareholders' interests. T 2. A firm making more than a normal profit may still be experiencing an economic loss. T 3. An inferior good is a good whose demand

    asked on May 13, 2015
  72. english

    Choose the correct sentence pattern for the sentence below. I hereby declare Tuesday Shakespeare Day.

    asked on April 19, 2015
  73. Chemistry

    What volume of carbon tetrachloride (density = 2.71 g/mL) contains 2.46x10^25 chlorine atoms? I did: 2.46x10^25 Cl atoms x 1 atom/4 atoms x 1 mol/6.02x10^23 x 154 g/1 mol x 1 mL/2.71 g And the correct answer is apparently 572 mL when I got 581 mL.

    asked on March 29, 2015
  74. Chemistry

    What volume of carbon tetrachloride (density = 2.71 g/mL) contains 2.46x10^25 chlorine atoms?

    asked on March 29, 2015
  75. Chemistry

    If 84.1 g of sodium hydroxide are reacted with 51.0 g of aluminum in the following equation: 2NaOH + 2Al + 2H2O --> 2NaAlO2 + 3H2 a) what mass of excess reactant remains? b) what mass of water would react?

    asked on March 28, 2015
  76. Physics

    A baseball player leads off the game and hits a long home run. The ball leaves the bat at an angle of 30.0o from the horizontal with a velocity of 40.0 m/s. How far will it travel in the air? Working out please

    asked on March 17, 2015
  77. Maths

    e) A fair coin is tossed 6 times. What is the probability of getting exactly 2 heads? What is the mean of this experiment?

    asked on February 7, 2015
  78. Math

    I have 14 hundreds, 16 tens and 9 ones. What number am I?

    asked on February 4, 2015
  79. Math

    The winner of a raffle will receive 3/4 of the 530.40 raised from raffle ticket sales

    asked on January 22, 2015
  80. Math

    Delia has 493 stamps in her stamp collection. She can put 16 stamps on each page of an album. How many pages can she fill completely?

    asked on January 21, 2015

    Find the present value of the ordinary annuity. Please round the answer to the nearest cent.$2,000 per semiannual period for 7 yr at 12%/year compounded semiannually

    asked on December 30, 2014
  82. Math

    The denominator of a fraction is one more then the numerator. If 2 were added to both the numerator and denominator, the new fraction equals 4/5. Find the original fraction.

    asked on December 18, 2014
  83. Cardiovascular Respirtory

    In which condition is the patient most likely to hemorrhage? A. Thalassemia B. Erythroblastosis fetalis C. Thrombocytopenia D. Polycythemia

    asked on December 17, 2014
  84. physics

    A 75-g piece of aluminum at 89 °C is dropped in 1.0 L of water at 1.3 101 °C, which is in an insulated beaker. Assuming that there is negligible heat loss to the surroundings, determine the equilibrium temperature of the system

    asked on December 8, 2014
  85. math

    Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint. Did Gina use the same ratio of yellow paint to blue paint instructed by her teacher.

    asked on December 7, 2014
  86. math

    taryn and alastair both mow lawns. Each charges a flat fee to mow a lawn. The table shows the number of lawns in the past week, the time spent mowing lawns and the money earned. Taryn mowed 9 lawns. She spent 7.5 hrs mowing lawns. Taryn earned $112.50

    asked on December 3, 2014
  87. math

    1/3 / 7/9 =1/3 * 9/7 =9/21 is this right??

    asked on November 23, 2014
  88. math

    1 3/5 - 5/6 =8/5 - 6/5 =2/5 or is it =1/3/5 - 5/6 =48/30 - 25/30 =23/30 I don't know which one is right. Pleas e help!

    asked on November 23, 2014
  89. math

    3/8 + 2 1/2 =3/8 + 5/2 =8/10 =4/5

    asked on November 23, 2014
  90. math

    5/7 *9/10 =63/70 =9/10

    asked on November 23, 2014
  91. math

    5/7 * 9/10 = 50/70 * 63/70 =3150/70 =45

    asked on November 23, 2014
  92. math

    4/5 * 3/4 = =16/20 * 15/20 =240/20 =12 is this right?

    asked on November 23, 2014
  93. math

    A jar contains 133 pennies. A bigger jar contains 1 2/7 times as many pennies. What is the value of the pennies in the bigger jar

    asked on November 23, 2014
  94. Advanced Finance

    6. (TCO F) Suppose the December CBOT Treasury bond futures contract has a quoted price of 80-07. What is the implied annual interest rate inherent in the futures contract? Assume this contract is based on a 20-year Treasury bond with semiannual interest

    asked on November 21, 2014
  95. decimals

    Mark wants to paint a mural. He has 1 1/3 gallons of yellow paint, 1 1/4 green paint, and 7/8 gallon of blue paint. mark plans to use 3/4 gallon of each paint color. How many gallons of paint will he have left after painting the mural?

    asked on November 18, 2014
  96. math

    Melina walked her dog 2 1/5 miles. Cathy walked her dog 1 3/4 times as far as Melania did. How many more miles did Cathy walk her dog?

    asked on November 15, 2014
  97. Physics

    A 1000 kg Toyota, initially traveling at 40 mph, collides into the rear end of a 2000 kg Cadillac, initially stopped at a red light. The bumpers lock and the two cars skid for 2 seconds before coming to rest. Calculate the coefficient of kinetic friction

    asked on November 2, 2014
  98. math

    In order to pass a physical education class at a university, a student must run 1.0 mi in 12.5 min. After running for 10.0 min (assume constant speed), she still has 510 yd to go. What constant acceleration does she need over the final 510 yd in order to

    asked on September 14, 2014
  99. Physics

    You are given vectors A = 5.0i - 6.5j and B = -2.5i + 7.0j. A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 15.0. Find the x and y components to vector C. Answer key shows x component is

    asked on August 30, 2014
  100. chemistry

    In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor. If you burn 54.8 g of hydrogen and produce 4.90 × 102 g of water, how much oxygen reacted?

    asked on August 29, 2014


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