Newest questions and responses by Caroline
  1. Science

    1. What stretches over most of the Arabian Peninsula ? a. Fertile farmland b.forest c. Desert d. Lakes 2. Camels were used by Bedouin’s because they require very little a. Food b. Water c. Sunlight d. Sleep 3. A search of waterfront in the desert is

    asked on May 22, 2018
  2. Statistics

    The normality of NaOH obtained was 0.0172, 0.0187, 0.0185, 0.189, and 0.0183 N. The theoretical normality of NaOH was 0.02 N. Please calculate: 1) Standard deviation based on the true mean: 2) Standard deviation based on the experimental mean: SD 3)

    asked on February 19, 2018
  3. Chemistry

    What volume of concentrated sulfuric acid (20% weight/weight, density = 1.14) is needed to prepare 1 L of a 0.5 N solution of sulfuric acid?

    asked on February 11, 2018
  4. Chemistry

    Describe the preparation of 500 ml of 0.25 M solution of NaOH from NaOH pellets (88% purity).

    asked on February 1, 2018
  5. Math

    How do you check the answer to a decimal multiplication problem plz explain your reasoning

    asked on December 4, 2017
  6. Math

    How can you check the answer to a decimal multiplication problem

    asked on December 4, 2017
  7. Math

    The amount of active ingredient of medicine ingested by the body, A in milligrams, is a function of time, t, in hours, given by A(t)=5/8(12t-t^2). a)Determine the average rate of change of the amount of medicine ingested during each of the intervals below

    asked on July 25, 2017
  8. Math

    Two software companies are developing new android apps. The average profit per x hundred downloads earned by each company can be modelled by the rational functions below, where x > or equal to 0. Trance Media: G(x)=80x+150/x Ellen's incorporated:

    asked on July 25, 2017
  9. MATHS


    asked on June 26, 2017
  10. language arts

    What is the appositive in this sentence? My father, David, goes to the golf course on Sundays. David father golf course Sundays

    asked on May 18, 2017
  11. language arts

    What is the preposition in this sentence? After the movie, we will grab a pizza to take home. after will grab to I think C

    asked on May 18, 2017
  12. language arts

    Jane's artwork is displayed alongside other contemporary art pieces at the modern art museum. which word that can be used to describe Jane's artwork has the most positive connotation? weird eccentric original odd

    asked on May 18, 2017
  13. 5th grade math

    Darren finished 5/6 of his homework. Olivia finished 1/6 less than Darren. How much of Olivia's homework did she finish? Make sure to simplify your answer.

    asked on January 10, 2017
  14. Physics

    A non-homogeneous trunk, 5 meters long and 100 kilograms mass is in equilibrium and is hung at the ends by two strings; One form an angle of 37 degrees and the other an angle of 53 degrees, both with the horizontal. Determine the location of the center of

    asked on December 10, 2016
  15. math algebra

    A tax free municipal bond pays 4.75% compounded continuously. What is the value of a $2,000 bond after 30 years? Round your answer to the nearest cent. [Hint- A=P e^rt where P= present(initial) value, A= future value, r= annual rate, and t= number of

    asked on December 1, 2016
  16. Math

    Leah spent 5/6 of an hour doing homework on Monday on Tuesday she spent 3/4 of an hour and on Wednesday she did it in 5/8 of an hour How much time did she spend doing her honework on Minday Tuesday and wednesday I know how to concert 5/6 and 3/4 hour but

    asked on November 29, 2016
  17. Probablility

    There are 4 cardio stations and six weight lifting stations at the gym. You decide to chose 4 stations randomly for today's workout. Whats the probability that you choose all weight lifting or all cardio?

    asked on November 27, 2016
  18. Calculus

    A lighthouse is built on an exposed reef, 5 miles off-shore. The shoreline is perfectly straight, and a town is located 9 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to the

    asked on November 8, 2016
  19. Physics

    a 50 kg ice skater is skating on a frozen lake where the ice has a coefficient of friction of .08. How much force is required to push her across the ice at a constant velocity?

    asked on October 5, 2016
  20. Physics

    You throw a water balloon hoping to hit your sibling. You throw it at an angle of 21.0° at 5.50 m/s. It ends up leaving your hand at a height of 1.70 m above the ground. It completely misses your sibling and breaks on the ground. How far did the water

    asked on September 25, 2016
  21. Physics

    You push a skateboard so that it rolls down the road at a speed of 0.700 m/s. You run after the skateboard at a speed of 3.90 m/s and while still behind the skateboard you jump off the ground at an angle of 28.0° above the horizontal hoping to land on the

    asked on September 25, 2016
  22. Math

    what is the vale of 4²-2(3÷5 + 1)? A 8 B 1 C -16* D -21

    asked on September 12, 2016
  23. Math

    1. what is the solution o 204 - (-36)? A 240** B - 240 C 168 D -168 2. what is the solution of 87 + (-396)? A 183 B -183 ** C 9 D -9 3. Evaluate: -12 x 3 =? A 36 B -36** C 4 D -4 4. Evaluate: -20 ÷ -10 =? A 200 B -200 C 2 **8 D -2 5. Select all the

    asked on September 12, 2016
  24. Math

    which symbol is used to make -6 |-8| a true statement? A > B < C =

    asked on August 24, 2016
  25. Economics

    What factors do you need in order to calculate a country's level of development?

    asked on May 30, 2016
  26. math

    An account earns annual simple interest. Find the balance of the account. $2000 at 9% for 6 months = $

    asked on May 26, 2016
  27. math

    An account earns annual simple interest. Find the balance of the account. $250 at 4% for 1 year = $260 $2000 at 9% for 6 months = $?

    asked on May 25, 2016
  28. algebra 1

    Evaluate: 30 - m/6 for m = 30. a. 25 b. 0 c. 6 d. 1 i chose a. 25? please verify. thanks

    asked on May 21, 2016
  29. Life orientation

    Evaluate the physical,social and economic consequences of this crime to the offender

    asked on May 1, 2016
  30. Math ratio

    Melanie mixes water with plant fertilizer in a proportional relationship that can be represented by the equation w=3p, where w is the number of quarts of water and p is the number of tablespoons of plant fertilizer. To keep this suggested ratio,should

    asked on April 10, 2016
  31. Math

    1.Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in the following box plots: two box plots shown. The top one is labeled Males. Minimum at 1, Q1 at 3, median at 10.5, Q3 at 14,

    asked on February 22, 2016


    asked on February 22, 2016
  33. Art

    When creating a collection based on a message, an artist should consider all of the following except A. the audience the collection will the presented to B. the subject matter they most prefer using as a reference C. the dollar amount they wish to sell it

    asked on January 16, 2016
  34. Physics

    You have two tuning forks. One is a known frequency of 200 Hz. The second for his plate, there is a big frequency of five beats per second. What a piece of gum is placed on the second fork, the frequency increases three beats per second. What is the

    asked on January 14, 2016
  35. chemistry

    Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C? that is all of the information that was provided

    asked on December 2, 2015
  36. Chemistry

    Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C?

    asked on December 1, 2015
  37. English

    When the subject of the sentence is plural, should the nouns that follow agree with the subject's plurality? For example: In this stage, writers review and amend their paper to better articulate their intended message. Should the terms "paper" and

    asked on November 24, 2015
  38. physics

    A hollow cylinder, a solid cylinder, a hollow sphere, and a solid sphere roll down a ramp without slipping, starting from rest. The ramp is 0.25 m high. All the objects have radius 0.035. What are their final speeds? Please show what equation you used and

    asked on November 6, 2015
  39. Physics

    two students working on physics assignment to find out how far window is from the roof of a building drop a ball over the edge of the roof the ball takes .1 seconds to travel from the top of the window to its bottom of a distance of 1 m assume the

    asked on October 19, 2015
  40. Physics

    A child climbs up a set of stairs and reaches a height of 2.5m what is the child's gain I potential energy ?

    asked on October 11, 2015
  41. Math

    gena,freddie,and hank went running.gena ran 1/3 mile,freddie ran 4/7 mile,and hank ran 2/5 mile.who ran the farthest?

    asked on October 9, 2015
  42. physics

    A box of mass 50 kg starts from rest to slide down a ramp that makes an angle of 10.7 degrees with respect to the horizontal. 6.3 seconds later, it has covered a distance of 3.39 meters. What is the coefficient of kinetic friction?

    asked on September 30, 2015
  43. Math / Finance

    You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When

    asked on September 20, 2015
  44. Finance

    You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When

    asked on September 19, 2015
  45. life orientation

    extent to which bad road use has a direct impact on the physical

    asked on August 23, 2015
  46. algebra 2 and trig

    The scores on a chemistry test are normally distributed. Approximately 95 percent of the scores fell between 78 and 92. What is the standard deviation for this distribution?

    asked on May 18, 2015
  47. Chemistry

    What is the value of the equilibrium constant at 25°C for the reaction between each of the following? (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq) I have been unable to get either and have spent the last two hours attempting it. I have been using the

    asked on May 4, 2015
  48. Literature

    I have an 8-10 page final essay due concerning the Odyssey. I know my topic I want to use for my essay is FAMILY. The problem I having is forming an argumentative thesis. My question is... How would I begin to form an argumentative thesis? I continue to

    asked on April 30, 2015
  49. Literature

    I am currently writing a compare/contrast paper discussing Flannery O'Connor's literary works and Dennis Covington's novel Salvation on Sand Mountain. My question is... Would I use present perfect or past perfect when discussing Dennis Covington's novel

    asked on April 26, 2015
  50. Biology

    Could you potentially use up all of your memory B and T cells for a specific antigen and become susceptible to that antigen again?

    asked on April 13, 2015
  51. Chemistry

    A professor wanted to set up a similar experiment as the one you performed in lab. The professor wanted to use Al(OH)3 in place of Ca(OH)2. Calculate how many mL of saturated Al(OH)3 solution it would take to titrate against 12.00mL of 0.0542M HCl

    asked on April 9, 2015
  52. Chemistry

    Instead of using ratios for back titrations we can also use molarities if our solutions are standardized. A 0.188g sample of antacid containing an unknown amount of triprotic base Al(OH)3 was reacted with 25.0mL of 0.101M HCl. The resulting solution was

    asked on April 6, 2015
  53. Chemistry

    Instead of using ratios for back titrations we can also use molarities if our solutions are standardized. A 0.188g sample of antacid containing an unknown amount of triprotic base Al(OH)3 was reacted with 25.0mL of 0.101M HCl. The resulting solution was

    asked on April 3, 2015
  54. Chemistry

    1. Imagine you have a saturated solution of Ca(OH)2, at equilibrium, that has some undissolved Ca(OH)2 precipitated on the bottom of the test tube. If you add an additional scoop of Ca(OH)2 to the solution will concentration of [OH-] in the solution

    asked on March 16, 2015
  55. Chemistry

    Calculate the volume at which pH = pKa if 30.00mL of weak acid with a concentration of 0.0955M is titrated against a strong base with a concentration of 0.1233M.

    asked on March 11, 2015
  56. Chemistry

    Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If 0.46 mol H2S is placed in a 4.6 L container, what is the equilibrium concentration of H2(g) at 700°C? So I thought that by

    asked on March 10, 2015
  57. Chemistry

    At 19.0°C, what is the fraction of collisions with energy equal to or greater than an activation energy of 151.0 kJ/mol? I got 1.06 which wasn't right

    asked on March 5, 2015
  58. Chemistry

    If all the H2O2 in 25mL of a 3% solution of H2O2 decomposed, calculate the diameter of a sphere that would contain the resulting O2 at 1 atm and 296K. I understand how to do the problem if I have moles but I am not sure how to get moles. I thought

    asked on February 18, 2015
  59. Chemistry

    The coinage metals -- copper, silver, and gold -- crystallize in a cubic closest packed structure. Use the density of gold (19.3 g/cm3) and its molar mass (197 g/mol) to calculate an approximate atomic radius for gold. Work So Far:

    asked on February 3, 2015
  60. ela

    is there another way of saying better understand? the snetence im trying to write is "imagery can also help the reader to better understand the poem thus the reader is able to ...(is it appropriate to write better understand again here?)"

    asked on February 2, 2015
  61. Honors Physics

    A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. If he can paddle his canoe at a velocity of 6.2 m/s, will he make any headway? What will his velocity relative to the shore be?

    asked on December 18, 2014
  62. Chemistry

    A gas is allowed to expand at constant temperature from 4.274L to 6.877L against an external pressure of 1.977 atm. If at the same time the gas absorbs 773 J of heat from the surroundings, what is Delta E for this process? (Note: Pay attention to units; 1

    asked on December 14, 2014
  63. Chemistry

    A 500 mL flask has a measured volume of 586.0 mL. A 0.608g sample of an unknown vapor occupies the flask at 373K at a pressure of 0.981atm. Assume the vapor behaves ideally. What is the molecular weight of the unknown vapor?

    asked on December 7, 2014
  64. Chemistry

    A student analyzing 2.000g of Epsom Salt found that it contained 39.0% by mass water. What is the hydration number for this sample?

    asked on December 7, 2014
  65. Chemistry

    A student was isolating copper metal from a copper salt. If the student started with 1.255g of copper (II) sulfate how many grams of copper solid would you expect them to recover?

    asked on December 7, 2014
  66. chem/science

    A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the

    asked on November 24, 2014
  67. please help! physics

    A 1200 kg car is moving at 95 km/h when the driver notices a deer down the road. He immediately moves his foot toward the brake pedal, taking only 0.50 seconds before the car starts slowing down. The brakes cause a net force of 2400 N (backwards) on the

    asked on October 21, 2014
  68. Geology

    Hi, I am doing a geology course and I am really struggling with the topography graph. Currently, I am doing a test/quiz that involves me finding out what the contour interval is,the elevations of lines, and so on. I have tried looking back over the

    asked on July 18, 2014
  69. Math Homework: Check Answers

    1. Suppose you earned 8t - 3 dollars on Monday and 6t + 5 dollars on Tuesday. What were you total earnings? Simplify your answer. A) 2t + 2 B) 2t - 8 C) 14t + 2 D) 14t - 8 Answer: A 2. f^2 • f^4 A) (2f)^8 B) (2f)^6 C) f^8 D) f^6 Answer: D 3. 100^12/100^8

    asked on May 27, 2014
  70. Data Management

    Emilio has played ten rounds of golf this season. His mean score is 80 and standard deviation is 4. Assume Emilio's golf scores are normally distributed. a) Find the 95% confidence interval of Emilio's mean golf score b)Find the 95% confidence interval of

    asked on May 15, 2014
  71. physics

    A square loop of wire of side 2.8 cm carries 3.0 A of current. A uniform magnetic field of magnitude 0.67 T makes an angle of 43° with the plane of the loop. (a) What is the magnitude of the torque on the loop? (b) What is the net magnetic force on the

    asked on May 14, 2014
  72. physics

    What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

    asked on May 13, 2014
  73. Algebra 1

    Can you please check my work? A city planning committee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Is this an example of a: random sample, systematic sample, self-selected sample, convenience sample,

    asked on April 27, 2014
  74. Algebra 1

    Will you please check my work? :) Choose ALL (if any) applicable terms for the events described, then calculate the probability of the events. Jason has a cube with colored sides: red, orange, yellow, green, blue and purple. 1. Rolling a red or a primary

    asked on April 27, 2014
  75. Algebra 1

    Can you please check my work and help me with the parts that I don't understand? For each event, choose the most appropriate term and solve the problem. 1. In a sweepstakes with nine hundred entries, the first winner selected receives the grand prize, the

    asked on April 27, 2014
  76. Chemistry

    Write the balanced net ionic equations for the reactions of the halogens with copper metal. The halogens are oxidizing agents and the copper metal is a reducing agent. a) Bromine (Br2)+copper metal (Cu) b) Iodine (I2) + copper metal (Cu) Based on your

    asked on April 16, 2014
  77. math

    What is 8% of 15?

    asked on April 14, 2014
  78. Math Polygons

    I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.

    asked on March 19, 2014

    1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

    asked on March 5, 2014
  80. Math Help? Check my answers.

    1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

    asked on March 5, 2014
  81. life orientation

    identify three study fields/career paths in order of preference and provide two reasons for each choice

    asked on March 5, 2014
  82. Molecular cell Biology

    The following chemicals have the indicated formula weights:Sucrose-342.3,Potassium dihydrogen phosphate(KH2PO40-136.09,Tris -121.14.You also have the following solutions made:20%SDS,5M NaCl,500mM EDTA.You have a 40%glycerol solution and 10X TBE.List the

    asked on January 19, 2014
  83. Math

    If you can buy three raffle tickets for $5, how many tickets can you buy for $55? I need to know to different ways to solve this problem...

    asked on November 14, 2013
  84. physics

    I am having a really hard time figuring this question out, would somebody be able to help me? Imagine a giant dry-cleaner's bag full of air at a temperature of -35∘C floating like a balloon with a string hanging from it 12km above the ground. Estimate

    asked on August 5, 2013
  85. PreCalculus

    Could someone check these? I'm finding the magnitude for 5 and 6. 5. v=3i+j My magnitude is 3.16 6. v=2i+3j My magnitude is 3.61 For 22 and 23 I'm finding each specified vector or scalar. u=2i-5j, v=-3i+7j, w=-i-6j 22. v+w answer: -4i+j 23. u-v answer:

    asked on June 11, 2013
  86. PreCalculus

    I'm having trouble with these problems.. Could someone please explain how to find the domain of either of these functions? 3. f(x) =(x-2)/(x^2+6x+8) 7. g(x)= sqrt[(9)/(x+3)]

    asked on June 11, 2013
  87. English

    Which of the following is NOT a Gothic element in this novel? A. the low, demonic laugh in the hall at midnight B. strange laughter in a hidden, upstairs room C. the mysterious fire in Rochester’s bedroom D. the young Jane’s growing love for the older,

    asked on May 26, 2013
  88. Pre-Calculus

    I'm having trouble with this problem because I'm not sure what to do with the 1.. 21. (x-5)^2+(y+2)^2=1 (x-(5))^2+(y+2)^2= ???? center= (5,2) radius= ???

    asked on May 10, 2013
  89. Pre-Calculus

    I'm currently working with parabolas, and I'm not sure if I am doing this specific problem correctly.. 12. x= y^2-6y+6 y= -b/2a = 6/2(1)= 6/2= 3 x= (3)^2+6(3)+6 x= 33 y=3 (33,3)

    asked on May 10, 2013
  90. Pre-Calculus

    45. log b sqrt 7x 46. log b sqrt (3/y) Could someone please explain these?

    asked on May 6, 2013
  91. Pre-Calculus

    My book doesn't explain how to do these problems.. The examples they tell me to refer to have no relevance whatsoever. Any help would be appreciated. Use the power property to rewrite each expression. 17. log_3(x)^2 18. log_2(x)^5 19. log_4(5)^-1 20.

    asked on May 5, 2013
  92. Pre-Calculus

    Could someone check my answers? 25. 32^(2x-3)=2 Answer- x= 8/5 26. 9^(2x+1)=81 Answer- x= 1/2 27. 1/4=2^3x Answer- x= -2/3 28. 1/27=3^2x Answer- x= -3/2 29. 9^x=27 Answer- x= 3/2 30. 32^x=4 Answer- x= 2/5 31. 27^(x+1)=9 Answer- x= 1/2 32. 125^(x-2)=25

    asked on May 1, 2013
  93. Pre-Calculus

    I'm having problems understanding how to do these problems. 25. 32^(2x-3)=2 27. 1/4= 2^3x 29. 9^x=27 33. 81^(x-1)= 27^2x

    asked on April 27, 2013
  94. World Geography

    Cultures often develop along with science and ____________.

    asked on April 23, 2013
  95. Pre-Calculus

    Could someone check my answers? 27. (16/9)^2/3 = 64/27 28. (49/25)^3/2 = 343/125 31. (-64)^2/3 = 8 32. (-8)^-4/3 = 1/16 or -1/16

    asked on April 23, 2013
  96. Excel

    Which option must be selected for all sheets within a workbook to be printed?

    asked on April 16, 2013
  97. Pre-Calculus

    I'm having trouble understanding how to do complex fractions.. My book doesn't explain it very well.. 12. (x+3/12)/(4x-5/15) 14. (2/x^2 + 1/x)/(4/x^2 - 1/x) 16. (1/y + 3/y^2)/(y + 27/y^2) If you could please explain how to begin the process I would

    asked on April 10, 2013
  98. Math

    I have some white and black marbles in a box. There are 30 white marbles. There are 14 more white marbles than black marbles. How many black marbles do I have?

    asked on April 5, 2013
  99. Physics

    Nicole throws a ball straight up.Chad watches the ball from a window 5meters above the point where Nicole released it . The ball passes Chad on the on the way up, and it has a speed of 10m/s as it passes him on the way back down.Determine how fast Nicole

    asked on April 4, 2013
  100. trig

    An airplane pilot wishes to maintain a true course in the direction 250° with a ground speed of 400 mi/hr when the wind is blowing directly north at 60 mi/hr. Approximate the required airspeed and compass heading

    asked on April 2, 2013


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