Questions Asked on
October 1, 2012

  1. chemistry

    Write a balanced chemical equation for the reaction that occurs when barium carbonate decomposes into barium oxide and carbon dioxide gas when heated. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

    asked by Anonymous
  2. Math, Trig

    The high level bridge, a railway bridge that crosses the Oldman River is over 1km long. From one point on the river, the angle of elevation of the top of the bridge is 62.6 degrees. From a point 20m closer to the bridge, the angle of elevation of the top

    asked by Sonny
  3. Physics

    A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.8 m/s and the tension in the rope is T = 21.7 N. 1)Now a peg is placed 4/5 of the

    asked by Anonymous
  4. geography

    Find a functional factor that connects Egypt to Africa, to Europe, and to Southwest Asia.

    asked by Anonymous
  5. language arts

    I have another question on object of the preposition. In the sentence, I found my homework inside my social studies book. Would the object of the preposition just be book or would it be social studies book? I'm getting confused. I know social studies tells

    asked by Brandi
  6. Physics

    Sam, whose mass is 80kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 8.0s. a) What is Sam's top speed? b) How

    asked by Anonymous
  7. math

    what two simpler problems can you use to find 9 times 38?

    asked by brendan
  8. Pre-Algebra

    If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground? Remember, the formula for distance is d = 16t^2. 1 3.2 10.5 16

    asked by Anonymous
  9. Physics

    To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern

    asked by AJ
  10. Organic Chemistry

    In lab, we did an oxidation of 2-ethyl-1, 3-hexanediol with acetic acid and sodium hydrochlorite. I understand the acid is the solvent and in combination with NaOCl produces hypochlorous acid the oxidizing agent. Then we mix with an ice salt mixture and

    asked by Anonymous
  11. statistics

    4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time

    asked by Ashley
  12. Statistic

    If a person told you what month he was born, would it be unusual to guess the date of his birth ( not including the year)? Justify your answer. (Note: An event is to be considered "unusual" if its probability is less than or equal to 0.05.)

    asked by Anonymous
  13. ap

    Identify the type of reaction C4H10(g) + O2(g) ! CO2(g) + H2O(g) 1. hydrocarbon synthesis 2. single displacement 3. incomplete combustion 4. complete combustion

    asked by cheri
  14. Math

    The number 57,733 contains two sets of digits in which one digit is ten times as great as the other. What are the values of the digits in each set?

    asked by Jimmy
  15. 7th grade math ms. sue please help

    If Fran’s fudge recipe calls for 2 and 1/2 cups of sugar and she increases it by 2/5 of a cup, how much sugar does she use? a. 2 2/10 b. 2 3/7 c. 2 4/9 d. 2 9/10 is the answer d because 2 1/2 plus 2/5 equals 2 9/10? If it is incorrect, then why? Thanks!

    asked by Delilah
  16. Math

    In the number 7,725 which places contains digits where one digit is ten times greater as the other?

    asked by Jimmy
  17. statistics

    4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time

    asked by Ashley
  18. ap

    An excess of aqueous AgNO3 reacts with 44.5 mL of 5 M K2CrO4(aq) to form a precip- itate. What is the precipitate? 1. K2CrO4 2. KNO3 3. Ag2CrO4 4. AgNO3 What mass of precipitate is formed? Answer in units of g

    asked by cheri
  19. Economics - Finance

    If your bank pays 5.5 percent interest on savings deposits, what is the simple interest paid in the third year on an initial $100 deposit? What is the total amount in the account after three years? What is the amount after three years if the interest was

    asked by Wendi Jones
  20. Daily word problems

    The distance across the front of the store is 294 feet. The distance from the front to the back is one-third of this distance. If the owners paint a sign all the way around the outside of the factory, how many feet long will the sign be?

    asked by Nay lean
  21. calculus

    If a rock is thrown upward on the planet Mars with a velocity of 13 m/s, its height in meters t seconds later is given by y = 13t − 1.86t2. (Round your answers to two decimal places.) (a) Find the average velocity over the given time intervals.

    asked by david
  22. Calculus

    A closed box is to be rectangular solid with a square base. If the volume is 32in^3, determine the dimensions for which the surface area is minimum.

    asked by kieran
  23. chemistry-lattice energy

    Determine the lattice energy for CaBr2 if the enthalpy of solution for CaBr2 is -145 kJ/mol, and the heats of hydration for Ca2+ and Br- are -1650 kJ/mol and -292 kJ/mol respectively.

    asked by Bru
  24. Geomatic Sequence

    In a geomatic sequence, the seventh term exceeds the fifth term by 1920. Find the sum of the first eleven terms if the common ratio of the sequence is 2.

    asked by Nina
  25. Chem

    Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the -2 mM, 7.16 times 10 to the -3 mM, 0.965 mM, and 5.00 times 10 to the -2 mM, respectively. What are the corresponding concentration is milligrams

    asked by HELP
  26. 7th grade math help quick please

    Which is irrational? 0.117117117 . . . 0.8596873205 . . . 0.812812812812 . . . 0.605605605 . . . 6. If there is 1/2 of a pizza and Jonas wants only 1/3 of it, how much of the pizza will he eat? (1 point) one-fifth two-fifths one-sixth two-sixths One

    asked by Delilah
  27. 7th grade science Ms. Sue

    Violent storms generally form along _____. (1 point) occluded fronts cold fronts warm fronts stationary fronts 2. Areas of low pressure usually have _____. (1 point) cloudy weather good weather descending air none of the above These are my answers. Are

    asked by Delilah
  28. Physics

    Sam, whose mass is 80kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 8.0s .

    asked by Anonymous
  29. chemistry

    A compound has the empirical formula CH2O. When 0.0866 g is dissolved in 1.0 g of ether, the solution’s boiling pint is 36.5oC. Determine the molecular formula of this substance

    asked by Danica
  30. ap

    An excess of aqueous AgNO3 reacts with 44.5 mL of 5 M K2CrO4(aq) to form a precip- itate. What is the precipitate? 1. K2CrO4 2. KNO3 3. Ag2CrO4 4. AgNO3

    asked by cheri
  31. Physics

    A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm

    asked by AJ
  32. trig

    a plane flying 33,000 ft is 130 miles from the airport when it begins to descend if the angle of descent is constant find this angle

    asked by gabby
  33. ap

    Which of the following metals or nonmetals are expected to displace Mn or Cl (respec- tively) from MnCl2? 1. Cu should displace Mn. 2. I should displace Cl. 3. Ca should displace Mn. 4. Br should displace Cl.

    asked by cheri
  34. Chemistry

    A chemist requires 0.780 mol Na2CO3 for a reaction. How many grams does this correspond to?

    asked by Tisha
  35. MATH

    tHERE ARE 4 FIFTH GRADE CLASSES IN A SCHOOL. EACH CLASS Has 24 STUDENTS. fOR EACH GYM PERIOD, TWO FIFTH GRADE CLASSES TAKE GYM TOGETHER. tHERE ARE 10 GYM PERIODS IN ALL DURING SCHOOL WEEK. wHAT INFORMATION IS NOR NEEDED TO FIGURE OUT HOW MANY TOTAL

    asked by lhyza
  36. chemistry

    What is the density of a sample of 65.0mL of automobile oil having a mass of 59.82g

    asked by tina sayers
  37. Chemistry

    Suppose you titrated a sample of distilled water with EDTA, approximately what volume of EDTA would be required?

    asked by Julie
  38. math

    if you used the rule (6x, 6y) to transform Mug into a new figure, how would the angles of the new figure compare to Mugs angles

    asked by Aaron
  39. world civilization ( the roman empire)

    What political, social, and economic problems beset Rome in the third and fourth centuries c.e.? How did Diocletian and Constantine deal with them? Were they effective in stemming the tide of decline and disintegration in the Roman Empire? What problems

    asked by lashay
  40. chemistry

    A 25.00 mL solution of potassium nitrate (KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to 1.000 103 mL. The concentration of the final solution is 0.00421 M. Calculate the concentration of the original solution.

    asked by Tim
  41. English 4

    The 14th century was a time of what? a.peace b.urban growth c.inflation d.upheaval and change

    asked by Monica
  42. chemistry

    Calculate the mass of solid Na2S2O3•5H2O required to prepare 300. mL of 0.0200 M Na2S2O3

    asked by Nicolai
  43. physics 23

    A 4.1-m-diameter merry-go-round is initially turning with a 4.2 period. It slows down and stops in 24 . How many revolutions does the merry-go-round make as it stops?

    asked by Anonymous
  44. ap

    If aqueous hydrofluoric acid is reacted with sodium hydroxide, which of the following sub- stances are in the net ionic equation? 1. fluoride ion, hydronium ion, and water 2. hydrofluoric acid, sodium ion, hydroxide ion, and fluoride ion 3. hydrofluoric

    asked by cheri
  45. AP US History

    Here is the question: How consistent were the republican principles applied by Thomas Jefferson and James Madison during their presidencies? How did their policies affect the Federalist Party during Jefferson's and Madison's administrations? Don't be mean

    asked by Cora
  46. Physics

    A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.

    asked by AJ
  47. chemistry

    Calculate the molar mass of a non-electrolyte that lowers the freezing point of 25.0 g of water to - 3.9 oC when 4.27 g of the substance is dissolved in the water.

    asked by Danica
  48. hard 5th Grade Math

    Two 5th grade classes raised money for their local animal shaelters.There are 20 students in Class A. Each student raised 12$. There are 26 students in Class B raised 1.5 times as much as each student in Class A. A. How much money was raised altogether in

    asked by Kristiana
  49. PHYSICS

    1.) A bird can fly 20 km/h. How long does it take to fly 12 km? 2.) If you are driving 116 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period?

    asked by HELP!
  50. English III

    In Dust Tracks on a Road, what kind of literature did the young Hurston like best that made her think of heroic deeds? B. stories of math geniuses

    asked by Hally
  51. Geomatic Sequence

    In a geomatic sequence, the 7th term exceeds the 5th term by 48. Find the first term if the common ratio is 2.

    asked by Fara
  52. Calculus

    Consider the planes given by the equations 2y−2x−z=2 x−2y+3z=7 (a) Find a vector v parallel to the line of intersection of the planes. (b)Find the equation of a plane through the origin which is perpendicular to the line of intersection of these two

    asked by Felicia
  53. ap

    Classify the reaction (NH4)2Cr2O7 ! N2 + 4 H2O + Cr2O3 as one or more of the following: Z1) combination Z4) metathesis Z2) decomposition Z5) displacement Z3) redox 1. Z2 only 2. Z2 and Z5 only 3. Z2 and Z3 only 4. Z3 and Z5 only 5. Z1 and Z3 only

    asked by cheri
  54. ap

    A ruptured tank in Anywhere, USA, spilled hydrochloric acid. Officials were reported to be concerned that the acid might mix with sodium hydroxide (caustic soda) in a neigh- boring tank and form a toxic gas. What toxic gas would be formed by mixing

    asked by cheri
  55. Math

    A baseball diamond is a square sides 22.4 m. The pitcher's mound is 16.8 m from home plate on the line joining home plate and second base.. How far is the pitcher's mound from first base? (we are using the LAW OF SINES AND COSINES)

    asked by Kailey
  56. finance

    Your company will generate $45,000 in cash flow each year for the next nine years from a new information database. The computer system needed to set up the database costs $260,000. Assume you can borrow the money to buy the computer system at 8.25 percent

    asked by Anonymous
  57. HEALTH

    1)What is a doctor's responsibility if a patient requests restrictions on the use of his or her PHI? a. Since HIPAA doesn't address this issue, the doctor is free to decide on a case-by-case basis. b. The doctor need not comply with the patient's wishes if

    asked by Marcelo
  58. Maths

    Hi, I am working on some Nth problems - can anyone tell me if this is correct :- Nth term sequence is n + 4 are the first three terms 5,6,7, A nth term is 85 - 5n are the first three terms of the sequence 17, 34, 51, A nth term is 2n - 0.5 are the first

    asked by Andy
  59. Physics

    A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?

    asked by Maria
  60. 7th grade math

    I need help on these two questions because i have no clue what to say.... What caused the rise of the feudal system in Japan? More than 100 years after Akbar's death, the Mughal Empire began to fall apart. What were two of the reasons that caused this to

    asked by Delilah
  61. Physics

    A pipe that is open at both ends has a fundamental frequency of 330 Hz when the speed of sound in air is 333 m/s. What is the length of this pipe? Answer in units of cm. What is the second harmonic? What is the third harmonic? Answer in units of Hz. What

    asked by AJ
  62. Maths, Ratio

    Mrs Rama uses 0.4 liters of water melon juice for every 0.9 liters of apple juice to make a jug of mixed fruit juice. A) Find the ratio of the amount of watermelon juice to the amount of apple juice. B) For every 225 ml of apple juice, how much watermelon

    asked by Justin
  63. Math

    Round 11.76 to the nearest one

    asked by Ant
  64. Physics

    A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?

    asked by Maria
  65. Physics

    if pressure inside a cylinder with a circular hatch is 2 atm and the radius of the entrance hatch is 12 inches, what force does the air exert on the hatch? i cannot figure out if it would be 13,300.6 lb 24 lb 288 lb 1,300.6 lb or 904.8 lb

    asked by Lauren
  66. Chemistry/Electrochem

    Consider a cell at 299K: line notation Fe-Fe2+(1.39)--Cd2+(2.35)-Cd Given the overall standard reduction potential of the cell is -0.038. What will the concentration of the Cd2+ solution be when the cell is dead?

    asked by Andres
  67. physics

    Bob shoots an arrow straight up into the air at 78.5 m/s. 1)What is the maximum height of the arrows flight? 2)How long is it in the air?

    asked by kadeem
  68. physics

    Consider again the problem of a car traveling along a banked turn. Sometimes roads have a "reversed" banking angle. That is, the road is tilted "away" from the center of curvature of the road. If the coefficient of static friction between the tires and the

    asked by sierra
  69. education

    6. Which of the following statements about the field of child development is correct? A. It’s devoted to understanding human constancy and change over the lifespan. B. It’s part of a larger, interdisciplinary field known as developmental science. C. It

    asked by mandy
  70. science

    if two carbon atoms are joined by a triple bond how many other atoms can each carbon atom bond with

    asked by Neil
  71. Physics

    The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength answer in m What is the fundamental frequency? Answer

    asked by AJ
  72. Math

    Bunches of 6 roses were selling for $8. Anita paid $40 for roses. How many roses did she buy? PLEASE HELP!

    asked by Kathryn
  73. Math

    Which coins would you use to make $0.28? Write two ways

    asked by Harry
  74. Chemistry

    how many grams of ethylene (C2H4) are required for the complete reaction of 31.7 grams of hydrogen gas?

    asked by Vilma
  75. Chemistry/Electrochem

    A concentration cell is built based on the following half reaction: Zn(2+) + 2e(-) > Zn E(o)=-0.761 Using two pieces of zinc of electrodes (each 100.0 g), two Zn(2+) solutions, 0.101M and 0.427M (both exactly 1.00 L in volume), and all the other materials

    asked by Andres
  76. English 4

    What are 3 common forms Anglo-Saxon literature?

    asked by Monica
  77. ap

    A volume of equimolar strong acid like HCl is mixed with an equal volume of equimolar strong base like NaOH in a beaker of water. What exists after the reaction? 1. mostly water molecules and HCl, NaOH, and NaCl molecules 2. mostly water molecules and Na+

    asked by cheri
  78. Math. due tomorrow

    A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b

    asked by kyle
  79. math

    the perimeter of an athletic field is 104 meters and the length is 12 meters more than the width find the width and the length.

    asked by john
  80. math

    a an sold a bicycle for an amount which was greater by rs. 988 than half price he paid for it an made a profit of rs. 300 how much did he sell the bicycle for???

    asked by TUHITUHI
  81. probability

    in a health study, 18% of americans are underweight. If 4 americans are randomly selected, what is the probability that at least one will be underweight?

    asked by Lisa
  82. Biology

    How can NaHCO3 function as both the acidic component of the NaHCO3/Na2CO3 buffer system and as the basic compnent of the H2CO3/NaHCO3 buffer system?

    asked by Jim
  83. math

    Two friends decide to cycle to a picnic spot the first person cycles 5 and a 1/2 km/hour and 2nd cycles 6 and a3/4 km/hour to make up for being slow the first person starts out two and half hour earlier after how much time and distance will the 2nd person

    asked by TUHITUHI
  84. American History

    1. The Articles of Confederation called for which of the following? A. A single legislative body B. A chief executive C. The right of the legislature to assess taxes D. The Northwest Ordinance 2. Jacques Cartier sailed to the New World in 1534 in search of

    asked by Lily
  85. CHEM

    25.0 CM3 OF 0.100M acetic acid is titrated with 0.900M of NaOH. Ka for acetic acid =1.85*10^-5. calculate 1)the intial pH of the solution. 2) the pH of the mixture at 1cm3 before the equivalence point. 3) the pH of the mixture at the equivalence point 4)

    asked by DARRYL
  86. physics

    A 4.1-m-diameter merry-go-round is initially turning with a 4.2 period. It slows down and stops in 24 . Before slowing, what is the speed of a child on the rim?

    asked by Anonymous
  87. ap

    Which of the following is best described as an acid-base reaction? 1. NaCl + AgNO3 !NaNO3 + AgCl 2. NH3 + H2O ! NH+ 4 + OH− 3. 2HgO ! 2 Hg + O2 4. Ca + 2H2O ! Ca(OH)2 + H2 5. KCl + NH4NO3 ! KNO3 + NH4Cl

    asked by cheri
  88. ap

    The net ionic equation for ALL aqueous reac-tion of strong acids and strong soluble bases that form soluble salts is 1. the formation of H2O from H+ and OH−. 2. the formation of water and the corresponding salt. 3. the formation of water from the

    asked by cheri
  89. calculus

    For what values of x does the graph of f have a horizontal tangent? (Use n as your integer variable. Enter your answers as a comma-separated list.) f(x) = x − 2 sin x

    asked by Anonymous
  90. Calc 3

    If a function of one variable is continuous on an interval and has only one critical number, then a local maximum has to be an absolute maximum. But this is not true for functions of two variables. Show that the function f(x,y)= 3xe^y − x^3 − e^(3y

    asked by Becky
  91. math

    roated beef has 20g of protein and 11g of calcium per serving. serving of mashed potatoes has 2g of protein and 25g of calcium, how many servings of each are needed to supply 29 grams of protein and 61 grams of calcium?

    asked by deepa
  92. chem

    Which of the following solutions has the highest concentration of Cl- ions? 500 mL of 0.10 M NaCl 100 mL of 0.20 M MgCl2 200 mL of 0.10 M FeCl3 400 mL of 0.30 M NH4Cl 200 mL of 0.20 M KCl

    asked by Joe
  93. science

    if two carbon atoms are joined by a triple bond how many other atoms can each carbon atom bond with

    asked by Neil
  94. calculus and physics

    An explosion causes debris to rise vertically with an initial velocity of 75 ft/sec. a. In how many seconds does it attain maximum height? b. What is the maximum height? c. What is the speed of the debris as it reaches 12 ft on the way back to the ground?

    asked by olivia
  95. algebra 2

    -0.25(6.4x)>120

    asked by Yasmin
  96. Chemistry

    How do I calculate the overall confidence limit and the overall relative confidence limit for the percent chloride? I've found the percent mass of chloride in the unknown to be 60.03 % and the formula we were given uses the mean but I have no mean in this

    asked by Danielle
  97. chemistry

    Which compound on the left, when dissolved in water, does not produce the corresponding compound(s) on the right? 1. CaO ! Ca(OH)2 2. SO2 ! H2SO4 3. NaH ! NaOH + H2 4. N2O5 ! HNO3 5. Cl2O7 ! HClO4

    asked by cheri
  98. physics

    A football is thrown directly toward a receiver with an initial speed of 15.8 m/s at an angle of 17° above the horizontal. At that instant, the receiver is 18 m from the quarterback. In what direction and with what constant speed should the receiver run

    asked by :)
  99. math

    Roberto and Luisa Barron Lopez each work full time jobs, and Luisa's mother, Carmena, collects a monthly pension of $628. Between the three of them, their total household income is $4238 each month. If Luisa earns $1772, how much does Roberto earn each

    asked by jaime
  100. math

    there are 15 boys and 18 girls in fifth grade. Find the ratio of boys to girls in fifth grade.(how do I get the answer) can someone show me how to work the problem

    asked by dan
  101. Math

    What is the scientific notation for 135,000,000?

    asked by Yolondia Jones
  102. chemistry

    A 25.00 mL solution of potassium nitrate (KNO3) was diluted to 125.0 mL, and 25.00 mL of this solution were then diluted to 1.000 103 mL. The concentration of the final solution is 0.00421 M. Calculate the concentration of the original solution.

    asked by Aiden
  103. into to film

    Review a film explain how cinematography is used within the scene how does the cinematography inform the setting? How does it inform the characters?

    asked by latasha
  104. Physics

    A ball is thrown downward from a balcony that is 19.6m above the ground one kid throws downward at 14.7m/s, at the same time another student throws a ball upward from the balcony at the same speed. what is the difference of the time the balls are in the

    asked by Bear
  105. math

    Order each set of numbers from least to greatest. 0.27,0.56,0.212, 0.563, 0.276, 0.5

    asked by stephanie
  106. Science

    The densities of the Jovian planets are A. not more than about 0.5 times the density of water. B. not more than about 1.5 times the density of water. C. from 3.9 to 5.5 times the density of water. D. more than 5.5 times the density of water. Reset

    asked by Anonymous
  107. Statistics

    3. A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community service will have higher Christian maturity scores. The

    asked by Anonymous
  108. MATH/PHYSICS

    1.) A bird can fly 20 km/h. How long does it take to fly 12 km?

    asked by please help!
  109. Chemistry/Electrochem

    Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which

    asked by Andres
  110. AP physics

    Lucy is using a programmable treadmill. She inputs a top speed into the treadmill and presses "start." The treadmill accelerates from rest at 0.100 m/s2 until it reaches that speed, after which it stays at that constant speed. Later, when she is getting

    asked by Philip
  111. Evolutionary Bio

    What is Ghost of selection past?

    asked by M
  112. Physics

    A mass m1 = 5.0 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5.9 kg. A force of magnitude F = 40.0 N pulls m1 to the left a distance d = 0.77 m. 1)How much work is done by the force F on the two block system?

    asked by J.C.
  113. physics

    the mass density of a mixture of ethyl alcohol and water is 950kg/m^3. is the mixture mostly water, alcohol, or about half and half. What is your reasoning?

    asked by tiffany
  114. College Physics

    a 5.63kg ball hangs from a vertical pole by a 2.4 long string. Assume the ball is moving at 4.33m/s in a horizontal circle with the string remaining taut. Calculate the angle that the string makes with the pole.

    asked by Nicole
  115. physics

    A ball is thrown straight up with an initial speed of 30 m/s. How high does it go? Assume the acceleration of gravity is 10 m/s 2 . Answer in units of m

    asked by James
  116. math

    jenny's company has two photocopying machines, one of which is older and slower than the other. In fact, the newer machine can put out four-thirds as many copies as the older machine in the same amount of time. If, while running at the same time, together

    asked by jaime
  117. math

    the high of a trapezoid is 10ft the upper base is 6ft shorter then the lower base if the area of the trapezoid is 50 square ft how long is the upper and lower base?

    asked by zac
  118. math

    One of the following functions is neither odd nor even. Which one? x^5 + 3x 6x^2 – |x^2| + 3 x^9 + 3x^7 + 6x (my answer)x^2 + 3x + 3 + |x –3| This is really tricky pre-calc graphing problem. Thanks for the help!

    asked by Anonymous
  119. 7th grade math help please

    12. Which of the following numbers is an example of an integer? square root of five square root of nine one-third 0.8 13. Which number is equivalent to 4/5? 25/100 0.2 16/100 0.8 14. Riding the bus, Jasmine uses two-thirds of her money for bus fare. What

    asked by Delilah
  120. Math

    One band has fewer than 40 speakers. They stack them in an array exactly 9 high. How many speakers could they have? Explain how you know.

    asked by Breana
  121. chemistry

    In the formula of crystalline CuSO4 I.E.:-CuSO4.5H2O, wHAT DOES THE 5H20 STANDS FOR???

    asked by Snehal
  122. physics

    what is the velocity of the jumper at the end of 1.5second? How far does he fall?

    asked by princess cayetano
  123. Phy new

    ____​2.​An object is thrown vertically upward with a speed of 25 m/s. How much time passes before it comes back down at 15 m/s? (Air resistance is negligible.)

    asked by Shan
  124. Chem

    Which of the following compounds are soluble? Choose at least one answer. a. BaSO4 b. K2SO4 c. KBr d. NaOH e. Al(OH)3 I originally thought it was the last four, but it isn't, or it isn't only/all of them. Aren't all sulfates and potassium soluble? What are

    asked by Anonymous
  125. Physics

    Pt. 1 Gas in a container is at a pressure of 2.3 atm and a volume of 6.1 m3. What is the work done on the gas if it expands at constant pressure to five times its initial volume? Answer in units of J My wrong answer: 56.12 Pt. 2: What is the work done on

    asked by Ray
  126. Physic

    A ball is thrown upward. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 7.2 m,. Neglect air resistance. Answer in units of m/s

    asked by Patrick
  127. Physics

    Pt. 1 Gas in a container is at a pressure of 2.3 atm and a volume of 6.1 m3. What is the work done on the gas if it expands at constant pressure to five times its initial volume? Answer in units of J My wrong answer: 56.12 Pt. 2: What is the work done on

    asked by Ray
  128. Math. Due in 4 hours. Please helpp!

    A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b

    asked by Lindsay
  129. Chemistry

    Sulfuric acid, H2SO4, is sold as a 36% aqueous solution. What is this concentration in A. Molality B. Molarity C. The Mole Fraction Please and thank you. :)

    asked by Em
  130. Physics

    Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.80 m. The stones are thrown with the same speed of 9.05 m/s. Find the location (above

    asked by Jackie Li
  131. Physics

    Consider the position of a ball thrown down with an initial speed of 17 m/s.What will be its position after 2.6 s? Let the initial position be 0. The acceleration of gravity is 9.8 m/s 2 . Answer in units of m

    asked by Diego
  132. Calc

    Evaluate the integral using any method: (Integral)sec^3x/tanx dx I started it out and got secx(1tan^2x)/tanx. I know I just have to continue simplifying and finding the integral, but I'm stuck on the next couple of steps. Also, I have another question

    asked by H
  133. physics

    A mass m = 14.0 kg is pulled along a horizontal floor with NO friction for a distance d =8.7 m. Then the mass is pulled up an incline that makes an angle θ = 27.0° with the horizontal and has a coefficient of kinetic friction μk = 0.41. The entire time

    asked by need of help
  134. french

    unscramble the word for a sport ciemesr

    asked by Anonymous
  135. PSYCHOLOGY

    what are the apparent symptoms of anxiety in terms of physiological, behavioral, and cognitive indicator? if both a parent and a child experience anxiety in similar situations, how would you account for the influences of heredity, preparedness, and

    asked by jasmine
  136. Math

    Refer to the following chart. Using the equation (body-size factor X height in centimeters = volume of lungs), calculate the difference in the lung volumes of a male athlete who is 62 inches tall and a female athlete who is 56 inches tall. Show your work.

    asked by In need of an answer fast!
  137. college stats

    can someone please explain the steps: suppose that the grade point average,denoted by X,of a university student is Normally distributed with the mean 2.786 and standard deviation 0.375 A). a student is on the deans list if her GPA exceeds 3.746. What

    asked by damon
  138. History

    The responsibility of compiling the data from the Domesday Survey fell to The Norman King the shire tenant in chief the office of the Exchequer the local sheriff none of the above

    asked by Billy
  139. English

    In the novel The Lord of the Flies, how do the many themes connect? So far the themes I have discovered have to do with society being built on ethics, fear or fear of the unknown, the loss of innocence, the capability of evil in human nature, and the

    asked by Kailyn
  140. math - integers

    The sum of 25 consecutive integers is 1000. What is the smallest integer used as an addendum?

    asked by nicole
  141. Math

    At the start, a biologist counts M microbes in a sample. Every day after that, the number of microbes  in the sample, is multiplied by some number N.   Write the expression for the number of microbes in the sample 1) after day one  2) after day two Use

    asked by Meagieting
  142. Physics

    The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and one-half wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.

    asked by AJ
  143. Accounting

    Accounting for a Job-Order Cost System [LO 3, 6, 7, 9] Bob and Beth Ford retired from the food services industry and began catering wedding receptions on a limited basis. The major costs in setting up their business included: linens, $1,600; two complete

    asked by Patricia
  144. Answer my grammar q.

    Please answer it quick i don't have a lot of time to wait for the answer!

    asked by Unknown
  145. Geometry

    True or False: If a ray bisects an angle of a triangle, then it also bisects the side opposite the angle. If a plane intersects a cylinder, then the intersection must be a circle. I think the first one is true and the second one is false.

    asked by Rayne
  146. Physical science

    Why through photosynthesis we mustn't put sodium or potassium hydroxide?? (an experiment for testing the carbon dioxide if it is important for the starch formation)

    asked by Razan
  147. Maths

    Find a three digit number so that when the digita of the number Are added together the total is one fifth of the product of the digits

    asked by Izzy
  148. chemistry

    what is the height of the ethyl alcohol that exactly fills a 200.0mL container? the density of ethyl alcohol is 0.789/mL

    asked by Alexis
  149. fransis xavier anglo indian

    how do you describe the night

    asked by shanmathi
  150. college physics

    By immersing a crown in water its volume is 26inc^3=4.2x10^-4m^3. what would its weight be if it were pure gold? What would its weight be if its volume were half gold and half lead?

    asked by tiffany
  151. Math

    Determine if the ordered pair is a solution to the system. -5x - 7y= 4 y= 1/2 x - 1 a. (2,2) b. (2, -2)

    asked by Neil
  152. 6th grade math

    how many hours dose it take for a rino to run 158,400 feet

    asked by Josh
  153. physics

    A compact disc spins at 2.7 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the CD when it reaches a point 2.8 cm from the CD's center.

    asked by sierra
  154. chemisry

    compare and contrast the abilities of carbon, sodium, and neon to form chemical bonds?????

    asked by alex
  155. math

    Abby takes 6 steps forward, them 2 steps back. If she repeats this pattern, how many steps will she be from where she started after 4 moves? After 5 moves?

    asked by anonymous
  156. math

    use the orden of operation and the digit 4 four time to write problems that have the following answers 44

    asked by kelly
  157. sew

    what is easing definition of easing

    asked by qwerty
  158. 7th grade math

    What is three-eighths written as a decimal? (1 point) 2.3 repeating 0.375 .3 repeating 2.667

    asked by Delilah
  159. history

    What are three good points to talk about in a research paper about child labor in the 1800s? 10th grade level please.

    asked by bob
  160. Chemistry

    254 g of copper sulphate, CuSO4 is dissolved in water to produce 650 ml of solution. Determines the degree of concentration of the solution in mol / L.

    asked by Maxine
  161. PHYSICS

    A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?

    asked by Liz
  162. English

    An example of back-formation is

    asked by Mike Howard
  163. Algebra

    What is the rule in equation form of an input/output table if the inputs are 2 10 and 6 and the outputs are 2 6 and 4 ?

    asked by Jenna
  164. english

    spelling rule V exercise: Which word is out of the place in each line? and why? a. equipped, preferred, controlled, committed, committee b. tonnage, stoppage, occurrence, recurrence, deferred, acquittal c. deterrent, different, installment, recurrent,

    asked by Anonymous
  165. maths

    what is prime factorization of 58

    asked by dian
  166. Chemistry

    I am trying to figure out how to calculate the reaction rate. In my question the reaction rate is: 1/2x molarity of sodium thiosulfate/reaction time Then I have to compare the rates of runs 1-3 and determine the orders of the reaction. Do I only find the

    asked by Zach
  167. Math

    A large company has a private computer network connecting 300 different sites. Each site is connected to the network independently with a switch that fails with probability 1% on any given day. 1. What is the probability that exactly two of 300 sites lose

    asked by Steven
  168. geography

    Will you please check my answers? 1. What is the capital of South Carolina, the first state to withdraw from the Union before the Civil War? Columbia, South Carolina 2. Which Scandinavian country has the highest overall elevation? Norway 3. What color is

    asked by Reed
  169. math

    A company produces three types of color TVs: Models X, Y and Z. Each model X requires 2 hours of electronic work and 2 hours of assembly work. Each Y model requires 1 hour of electronic work and 3 hours of assembly work. Each model Z requires 3 hours of

    asked by justin
  170. world civilization . NEED HELP ASAP

    What theories have scholars advanced to explain the decline and fall of the Roman Empire? What are the difficulties involved in explaining the fall? What explanation would you give?

    asked by lashay
  171. chemistry

    I need to determine how many grams of Cesium Iodide following solutes would be needed to make 5.00 102 mL of a 0.300 M solution.

    asked by Shawn
  172. english

    Early that day the weather turned and the snow was melting into dirty water. Streaks of it ran down from the little shoulder-high window that faced the backyard. Cars slushed by on the street outside, where it was getting dark. But it was getting dark on

    asked by zarra
  173. Math

    Create an addition word problem and a subtraction word problem using fractions. Show how to find the solution to each problem. Once you find the solutions to your problems, rewrite the solutions as either a terminating or nonterminating decimal.

    asked by Christian
  174. phi

    Karl Popper advocates, as a more efficient way to examine a scientific hypothesis, which of the following?

    asked by renee
  175. Math

    An amount of $2,500.00 is depsoisted in a bank paing an annual interest rate of 5.3% coumpounded quaterly. Find the balance after 3 years

    asked by Dierdre
  176. language arts

    In the sentence "You can get supplies from the stationary store." I know the prepositional phrase is from the stationary store and the preposition is from. Would the object of the preposition be just store or would it be stationary store? Thanks...

    asked by Brandi
  177. Physics

    A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?

    asked by Maria
  178. pre-calculus

    form a polynomial f(x) with real coefficients having the given degree and zeros. degree 5; zeros -7; -i;-9+i enter the polynomial. f(x)=a(?)

    asked by ladybug
  179. ela

    what is the word that describe sad and angry together

    asked by zarra
  180. educational research

    I so overwhelm and lost at the moment. Summarize and complete an annotated bibliography of at least ten (10) scholarly sources that pertain to your research topic. This annotated bibliography should be a minimum of five pages in length, excluding title and

    asked by June
  181. Spanish

    Part 2 Directions: Complete the description of the following people by using the correct form of the verb and translating the adjective. Remember to make it agree in gender and number with the person(s). Example: Elena _______________ (pretty). Response:

    asked by Unknown
  182. math

    what is 750 pounds equal to in tons please show your work because i need help!!!!

    asked by gaby
  183. Please

    The War of the Roses placed the __________ on the English throne. Lancasterists Tudors Sheffields Bosworths Normans

    asked by Isaac
  184. governement

    citizens of a place?

    asked by jenna
  185. college chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by

    asked by Cristian
  186. Math Help!

    is 10 000 more than 881 462 is 1000 000 less than 2 183 486 is 1 000 000 more than 746 000 is 1 000 000 less than 624 327 207

    asked by Jenna
  187. Grammar

    Does the sentence make sense: Sweat formed on the palms of my hands.

    asked by Unknown
  188. Physics

    A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.

    asked by AJ
  189. DEBATE

    How would you present a uniqueness, link,or impact in a policy debate? Someone told me that during the cross examination period. You are supposed to ask a question and once receive the answer you are given permission to add the link but, i forgot how the

    asked by Samantha
  190. Algebra

    -214 / 2

    asked by Melinda
  191. Math

    Expression for the square of one more than a number

    asked by Kelly
  192. psychology

    1. I am using a measure of optimism in a research study. Describe two things you need to know to be sure that I have a reliable and valid measure of the construct of "optimism." 2. Describe evidence for one situational factor that has been shown to cause

    asked by gifty
  193. Algebra

    y/10-25=75

    asked by LaTaya
  194. physical science

    determine how many millimeters of soft drink in a 2-L bottle and how many are in a sixpack of soda cans.Also express each answer in liters.

    asked by Kesha
  195. social studies

    on what terms did BC enter confederation?

    asked by sydney
  196. Dr. Bob, help please

    does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more

    asked by josh
  197. calculus

    Find an equation of the tangent line to the curve at the given point. y = sec x, (π/3, 2)

    asked by Anonymous
  198. math

    Radical /12

    asked by Donna
  199. fransis xavier anglo indian

    how do we know that the bicycle is moving fast

    asked by shanmathi
  200. math

    there are 5 people.Each person has 1 hat.How many are in all.4

    asked by jordan
  201. Healthcare Management

    Whay is the role and duties of an healthacre manager?

    asked by Sharon Walton
  202. chemistry ----------- chemistry

    on the atomic level , how are physical changes and chemical changes different ?

    asked by Maria
  203. Math

    How can you tell by looking at a graph if it's a linear, quadratic or exponential function?

    asked by Emma
  204. math

    the perimeter of an athletic field is 104 meters and the length is 12 meters more than the width find the width and the length.

    asked by john
  205. math

    the perimeter of an athletic field is 104 meters and the length is 12 meters more than the width find the width and the length.

    asked by john
  206. Math

    Two sides of a triangle measure 14 and 10. If A is the set of possible lengths for the third side, how many elements of A are integers? Is the correct answer 19 elements of A are integers?

    asked by Mark
  207. math

    the hardware store is 5 blocks east of john's house. sean lives 3 blocks west of the bank, which is 4 blocks south and 2 blocks west of the hardware store. how many blocks and in what direction is sean's house from john's house?

    asked by nancy
  208. science

    what are the four biogeochemical?

    asked by chy
  209. business communication

    Select a company of your choice in a sector that you would like to work in. Imagine that you have to make a brief presentation on this company to business school students. Develop:-a) A general and specific statement of purpose.b) The key idea.c) Your

    asked by Akash
  210. social studies

    what happenswhen its time to launch the hot air balloon

    asked by marco
  211. ILIAD (ENGLISH)

    In the book Iliad, was Achilles afraid to die in the Trojan war?

    asked by BOOKER PERRY
  212. introduction to ethics

    Virtue ethics regards which of these as virtues? (Points : 1) power envy temperance inconsistency

    asked by sonia
  213. math

    How many equal groups of 24? what info do I need

    asked by Janiya
  214. american history

    Was Zbigniew Brzezinski directly involved in continuing the SALT talks or did he try to reverse the policy of detente, during the Carter administration? Those are 2 of the 4 multiple choices given to me to answer the question,but I'm confused because I'm

    asked by Shawna
  215. Math

    You're friend tells you about a new online music site called ComboAl- bum that lets you choose any 10 songs from their song library for 9:99. ComboAlbum's advertising says their song catalogue is so large there are over 10; 000; 000 diff erent song

    asked by John
  216. Math

    Two sides of a triangle measure 14 and 10. If A is the set of possible lengths for the third side, how many elements of A are integers? Is the correct answer 19 elements of A are integers?

    asked by Mark
  217. Maths

    A sum of money is shared between Alice, Gayah and Sita in the ratio 3:2:4. If Gayah receives $4287.50, how much money do Alice and Sita receive altogether?

    asked by Zayn
  218. Math

    How do you write 0.013 in expanded notation

    asked by Hahaah
  219. english

    how to make a sentence with the word puerto escondido ?

    asked by raechel
  220. MATH 4TH GRADE

    THINK OF ALL THE WAYS TO BREAK 10 X 6?

    asked by DENISE
  221. Chemistry

    Would Tin(II) Fluoride be SnF^2? Im so confused!

    asked by Bryce
  222. English

    I had to write a paragraph about a personal experience of mine with no passive verbs. When I submitted mine my teacher told me it was almost correct but not right yet. Could you tell me a list of passive verbs?

    asked by Brittany
  223. HCR210

    How might a novice confuse the following advance directives within the Patient Self-Determination Act when distinguishing information as administrative or clinical? Here is my answer please tell me what you think.... administrative data includes

    asked by Sdao
  224. American Government -

    In most States, the right to vote was originally denied to all but which one of the following groups?

    asked by miracle
  225. programming

    Daily Life Magazine wants an analysis of the demographic characteristics of its readers. The Marketing Department has collected reader survey records containing the age, gender, marital status, and annual income of readers. Design an application that

    asked by Penny
  226. algebra

    What is the rule for this equation. in: 1 2 3 4 5 6 7 8 9 10 out: 1 3 6 10 15 21 28 36 45 55

    asked by Anonymous
  227. English

    An example of back-formation is

    asked by Mike Howard
  228. math

    solve the follow inequality. write your solution in interval notation. x^3-49x¡Ü0

    asked by ladybug
  229. Math

    Write the number that is 2 tens more than 53.

    asked by Harry
  230. math

    two numbers differ by 11 and 1/3rd of the greater exceeds 1/4th of the other by 7 . find the number ???

    asked by TUHITUHI
  231. AP PYHSICS

    A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?

    asked by Liz
  232. business math

    sam buys a $10,000.00 teasury bill at 5 1/2% what is the effective ratr?

    asked by heidi
  233. languagae

    what is the subject noun for Jack fell down the hill

    asked by damiyah
  234. Calculus

    Find the value of c where the line l tangent to the graph of y=2.5*5^x at (0,2.5) intersects the x-axis

    asked by Marlanea
  235. homework help

    compare and contrast the abilities of carbon, sodium, and neon to form chemical bonds?????

    asked by mandy
  236. algebra check please

    7(4 - t) = -84 i got: 28 - 7t = -84 -28 = -28 7t = -112 ----- ----- 7 = 7 t = -16 is this right : -16

    asked by marko
  237. chemistry

    how much E is used to heat 500g of iron from 22c to 55c? Cfe=0.451 Jg-1C-1.

    asked by mark
  238. math

    what is the prime factorization of 62

    asked by dian
  239. Healthcare

    Indicate at which point flat-of-the-curve medicine is experienced in the following example (imagine that antibiotics have been prescribed for a given population of 1,000 elderly persons).

    asked by Hope
  240. math

    A mother is 4 times as old as her son and 5 times as old as her daughter .When the son is three times as old as he is now, the mother's age will be 3 year's more than twice the daughter's age then what are there current ages??

    asked by TUHITUHI
  241. math

    mutiplaction 3 digit by 2 digit numbers

    asked by jander
  242. math

    solve the following inequality. write your solution in interval notation x^3-49x

    asked by ladybug
  243. Chemistry

    Please describe how you would approximately 0.050 M standard solution of NaCl by dissolving the appropriate amount of the salt in a 250 mL volumetric flask. Thank you!

    asked by Quinn
  244. chemistry

    A 31.0 mL solution of 0.155 M iron (III) perchlorate is prepared. This solution is then titrated with 27.1 mL of 0.250 M potassium hydroxide. What is the concentration of iron (III) perchlorate that remains in the solution?

    asked by Anonymous
  245. Science

    May you please list some pigs found in the caribbean. Thank you

    asked by Juanita
  246. intermediate algebra

    Y varies directly with square root of X. Y=3 when X=4. find Y when X=1

    asked by suzy
  247. check my precalc

    #1. solve x^2-120 I got (-infinity, -4) U (5,infinity) #3 what is the domain of this function? f(x)= squre root of (x-3x^2) i got [-1/3,0] thanks!!!

    asked by rebekah
  248. Statistics

    . Payne (2001) gave participants a computerized task in which they first see a face and then a picture of either a gun or a tool. The task was to press one button if it was a tool and a different one if it was a gun. Unknown to the participants while they

    asked by Elspeth
  249. Physics

    An object is released from rest on a planet that has no atmosphere. The object falls freely for 2.73 m in the first second. What is the magnitude of the acceleration due to gravity on the planet?

    asked by Diego
  250. Geometry

    True or False: If a ray bisects an angle of a triangle, then it also bisects the side opposite the angle. If a plane intersects a cylinder, then the intersection must be a circle. I think the first one is true and the second one is false.

    asked by Rayne
  251. language arts

    Hi..need help with this question. Tim is moving to a new house. The words is moving can also be called a a. verb phrase b. prepositional phrase c. linking verb d. main verb Thanks..

    asked by Brandi
  252. English

    what this question means: how does the point of view affect your interpretation of the events?

    asked by zarra
  253. cjs240

    Will someone please help me find a website to complete this assignment? Write a 200- to 300-word response in which you explain the court process as it relates to juvenile offenders.

    asked by sade c
  254. Earth Science

    How energy flows through the Earth's system?

    asked by John
  255. Physics

    ____​2.​An object is thrown vertically upward with a speed of 25 m/s. How much time passes before it comes back down at 15 m/s? (Air resistance is negligible.)

    asked by Shan
  256. math

    Find two answers the exact answer is between. 4*9

    asked by kyn
  257. language art

    sentences that are long show how toshorten sentence

    asked by paullanguage aet
  258. calculus and physics

    An explosion causes debris to rise vertically with an initial velocity of 75 ft/sec. a. In how many seconds does it attain maximum height? b. What is the maximum height? c. What is the speed of the debris as it reaches 12 ft on the way back to the ground?

    asked by olivia
  259. precalc

    how to graph y=5sin[3[2-pi/6]]+2

    asked by Deb
  260. math

    i need help with this problem 2x+2y+3z=-1 3x-5y-2z=21 7x+3y+5z=10

    asked by rayne
  261. math

    prime factorazation of 34

    asked by lisa
  262. chemistry

    How would you separate a mixture of equal amount of dibenalacetone a neutral compound and benzoic acid an acidic compound?

    asked by Julius muson
  263. English

    Would "the flight to cancun" be an anecdote or a memoir? Would "a day in Canada" be an anecdote or a memoir?

    asked by Emily
  264. math

    How long is the strip of wood shwan wants to buy

    asked by jackie
  265. Math

    if im given a scale of 1:200 can i start my graph at 100m

    asked by Lexi Reid
  266. Physics

    A crate with a mass of 50 kg has a coefficient of static friction with the floor of 0.8 and a coefficient of kinetic friction of 0.25. If it is pushed with a force of 425 N, how long will it take to move it across a 65 meter horizontal floor?

    asked by Katie
  267. Chemistry

    Which of the following compounds are soluble? Choose at least one answer. a. BaSO4 b. K2SO4 c. KBr d. NaOH e. Al(OH)3 I originally thought it was the last four, but it isn't, or it isn't only/all of them. Aren't all sulfates and potassium soluble? What are

    asked by u
  268. algebra check please

    help i am stuck : -8 - 5y = 12 - 9y i got: -8-12 -5y = 12-12 - 9y -20 - 5y = 9y -20 +20 - 5y - 9y im so stuck idont understand this one can you please help me

    asked by marko
  269. Math

    A vendor sold 1/3 of his fish balls in the afternoon and 2/5 of the remainder in the evening. If he had 150 fish balls left, find the number of fish balls he had at first?

    asked by Camille
  270. english

    use words 9-15 in a creative story. can you please help me!! besiege ephemeral altruism carrion erotic amorphous opulent I KNOW WHAT THEY MEAN I JUST NEED HELP FIGURING OUT HOW TO USE THEM IN A STORY

    asked by katie
  271. Math 7th grade

    1) of the dolls in mo's doll collection, 1/5 have red hair. of these 3/4 have green eyes. what fraction of Mo's dolls collection have both red hair and green eyes? 2) ( Use measurement conversions) find 1/2 of 1/4 of a gallon. 3) Cheryl is organizing her

    asked by catalina
  272. Science

    Calculate the molarity of a solution formed using 55.4 g of AgNO3 in enough water to form 250 ml of solution.

    asked by Megan
  273. Calculus

    Find the value of c where the line l tangent to the graph of y=2.5*5^x at (0,2.5) intersects the x-axis

    asked by Marlanea
  274. biology

    science has limitation because?

    asked by tameka
  275. calc

    d/dx (4ln) (2x)sin2x using product rule

    asked by ifrahissa
  276. algebra

    Explain the process for finding the equation for a line of best fit from a data table and evaluate whether it is possible to have 2 correct answers.

    asked by Tae
  277. algebra

    3x^3+x^2-12x-4=0

    asked by Katie
  278. precalc graph

    If it says to identify 5 critical points what would that be?

    asked by Deb
  279. Math

    Write an equation for a line of best fit for the data in the table below. Sandwich Total Fat Total Cals. Hamburger 9 260 Cheeseburger 13 320 Quarter Pounder 21 420 Quarter w/cheese 30 530

    asked by Tae
  280. physics/math

    If you are driving 116 km/h along a straight road and you look to the side for 3.0 s, how far do you travel during this inattentive period?

    asked by kyle
  281. biology

    what statement describes the 1st step of ecological community it is known as? A. reed plants attract dragonflies and mayflies. B. frogs and snakes arive after emergent plants are established. C.climax trees such as ash and beech appear and eventually

    asked by tameka
  282. Statistics

    Let X1,...,Xn be a sample from the N(0, sigma^2). 1) Find the method of moment estimator of sigma^2 2) Find the MLE estimator of sigma^2

    asked by Nick
  283. math 7th grade

    so is it okay if you explain to me why we multiply first and then divide???

    asked by catalina
  284. Science

    what happens when we apply force below the centre of mass of a cube ? Will it tip?

    asked by suman
  285. genetics

    In a village with 4300 people, 1 in 90 males has a condition called 5-ARD that causes men to be pseudo-hermaphroditic. What is the frequency of autosomal recessive 5-ARD allele in this village, assuming Hardy-Weinberg equilibrium?

    asked by kat
  286. Algebra 2

    Explain what the notation f(4)=100 means? We could also say that when x=___, y=___?

    asked by Maria
  287. Chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by

    asked by Cristian
  288. World History

    In the question "Why the haitian revolution probably truer to itself than it's French or American counterparts?" Is it referring to how the Haitian revolution stayed truer to their cause in revolution because they gave everyone equal rights, while american

    asked by Melissa
  289. psychology

    Albert Ellis depicts the relationship between irrational belief and negative emotions through use of: A. A contingency contract B. dialectical theory C. The abc model D. Observational learning

    asked by Sharon
  290. Break-Even Analysis

    Given: Jay Letterman has just (year: 2012) become product manager for Avenir. Avenir is a consumer product with a unit retail price of $1.00. Retail margins on the product are 33%, while wholesalers take a 12% margin. Avenir and its direct competitors sell

    asked by Andrea
  291. Social Studies

    Whose marriage transferred large amounts of French lands to the English king and essentially made the King of England a vassal to the French King? (1 point) Richard I & Lady MacBeth Edward the Confessor & Diana of Wales William the Conqueror & Margorie of

    asked by Paul
  292. Physics

    1. On a spacecraft, two engines are turned on for 648 s at a moment when the velocity of the craft has x and y components of v0x = 4360 m/s and v0y = 6270 m/s. While the engines are firing the craft undergoes a displacement that has components of x = 4.11

    asked by Thomas
  293. pre-calculus

    find the complex zeros of the polynomial function. write F in the factored form. f(X)=x^3-7x^2+20x-24 use the complex zeros to write f in factored form. f(x)= (reduce fractions and simplify roots)

    asked by ladybug
  294. PHYSICS

    WHEN THE BAROMETRIC PRESSURE IS 14.9LBS\IN AND THE PRESSURE GAGE ON A TIRE READS 34.6LBS\IN WHAT IS THE ABSOLUTE PRESSURE INSIDE THE TIRE

    asked by PATRICK
  295. Physics

    Consider the position of a ball thrown down with an initial speed of 17 m/s.What will be its position after 2.6 s? Let the initial position be 0. The acceleration of gravity is 9.8 m/s 2 . Answer in units of m

    asked by Diego
  296. math

    my paper says to divide two fractions by 1/2 to find out which one is biger, I forgot exactly how to do that, could you remind me?

    asked by Anonymous
  297. math

    my paper says to divide two fractions by 1/2 to find out which one is biger, I forgot exactly how to do that, could you remind me?

    asked by Anonymous
  298. math

    Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5? 1) commutative property of addition 2) distributive property 3) additive identity 4) additive inverse

    asked by amber
  299. Comment on my question

    PLEASE help me sorry its long!

    asked by Unknown
  300. language arts

    Would the sentence, "Sprinkle the colored sugar on top of the frosting." have 2 prepositional phrases....on top and of the frosting? Or would on top not be one? I know for sure of the frosting is one. Thanks...

    asked by Brandi
  301. math

    sorry i remembered the ? now you don't need to answer anymore.

    asked by Anonymous
  302. pre-calculus

    find a bound on the real zeros of the polynomial functions. f(x)=x^4+7x^3-x-2 every real zero of f lies between - ? and ?

    asked by ladybug
  303. math

    teemu's t-shirts designs and manufactures t-shirts for a $15 flat design rate and $7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them $10 for each t-shirt. write a function,c,

    asked by sahar
  304. world history

    Can someone help me on this? or give me a link that explains it to me? I have no idea what these things are saying... Read the following five document excerpts, and then write one well-organized paragraph summarizing the reasons many Americans felt pushed

    asked by Cora
  305. math

    teemu's t-shirts designs and manufactures t-shirts for a $15 flat design rate and $7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them $10 for each t-shirt. a) write a function,c,

    asked by sahar
  306. PHI 103

    construct an argument that supports Mary's decision to steal the food or an argument that shows why Mary should not steal the food.

    asked by sasha
  307. algebra

    400 Learners attended High School of the future for 4 days this past week. If 7 students were caught violating the uniform policy, what percentage was the overall compliance for the entire week???

    asked by Jasmn Theman
  308. History

    William Shakespeare recorded early English History as a historian for the Tudor line True False

    asked by Bobby
  309. math

    Factor each expression (X+5)^3-(2x+1)^3

    asked by Melissa
  310. Calculus

    determine the point(s)at which the graph of y^4 = y^2 -x^2 has a horizontal tangent.

    asked by Ashley
  311. math

    Factor each expression (X+5)^3-(2x+1)^3

    asked by Melissa
  312. Math

    Sorry guys but I cant seem to figure this out can you help me:) Billy has 7 pears and Sally has 4 pears . They have 11 pears all together Hannah takes 1 pear from Billy and 1 pear from Sally . How many pears do they have all together now?

    asked by Mr. Gibbens
  313. language arts

    Hi..need help determining whether the verb in this sentence is transitive for intransitive. "We arrived late for the movie." Thanks..

    asked by Brandi
  314. Math

    The zoo needs 1436 pounds of hay each week to feed the animals. Hay costs $2.00 per pound. About how much does the zoo spend on hay each week? What am I supposed to do?

    asked by Callie
  315. government

    set of land boundaries of a state?

    asked by jenna
  316. old forge math

    write an inequality to show the following. 4.90 was spent. there is still over 60$

    asked by elijah