Questions Asked on
December 16, 2010

  1. Chemistry (URGENT)

    In order to analyze the waste water containing Co^2+ from a manufacturing process, 1.0L of water was evaporated to 10.0mL, then placed in a spectrophotometer tube. The absorbance was found to be 0.20. Using your calibration curve, calculate the number of

    asked by John
  2. college

    what is the mass of solute dissolved in 50.0g of a 12.5% saline solution?

    asked by debbie
  3. phsyics

    A young girl sits at the edge of a dock by the bay, dipping her feet in the water. At the instant shown in the figure , she holds her lower leg stationary with her quadriceps muscle at an angle of 39 degree with respect to the horizontal. Use the

    asked by Lisa
  4. AP Physics

    A cowboy at a dude ranch fills a horse trough that is 1.7 m long, 50 cm wide, and 40 cm deep. He uses a 1.9 cm diameter hose from which water emerges at 1.3 m/s. How long does it take him to fill the trough? min

    asked by Alex
  5. algebra

    What is the value of x if 10 + 25x=5

    asked by Tahaji
  6. helping abused children

    the stubborn child law of 1646 by the state of massachusetts permits parents to do what

    asked by anna
  7. chemistry

    How much is the oxidation state of Cl2O3

    asked by Vlera
  8. 8th grade math

    circle A has a raduis that is twice the length og the raduis of circle B. Which is an accurate statement about the relationship of these areas of circle A and B and y? a.the area of circle A is 4 times the area of circle B b. the area of circle A is twice

    asked by Court
  9. math

    Troy is building a pool that is proportional to the Olympic-sized pool. The width of his pool will be 625 centimeters. find the scale factor troy will use to build his pool use the scale factor to show the length of troys pool if the length of the Olympica

    asked by Court
  10. AP Calculus

    a)Approximate root 26 by using the linearization of y= root x at the point (25,5) Show the computation that leads to your conclusion. b)Approximate cube root of 26 by using an appropriate linearization. Show the computation that leads to your conclusion.

    asked by Jerry
  11. physics

    a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached

    asked by Anonymous
  12. Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

    asked by Sammy
  13. Chemistry Kb question need to clarify something

    the pKb for methylamine is 3.36, what is the Kb for methylamine? pKa+pKb= 14.00 Kb= 10^-pKb = 4.4x10^-4 is the answer but HOW?? what is punched into the calculator to get 4.4 x 10^-4??

    asked by Lori
  14. physics

    a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached

    asked by Anonymous
  15. MATH please help!

    log 1/x + 3log2=log32

    asked by jessica
  16. Calculus

    A missile is rising vertically from a point on the ground 75,000 feet from a tracking station. The missile is rising at a rate of 16500 feet per minute at the instant when it is 38,000 feet high.What is the rate of change, in radians per minute, of the

    asked by Mika
  17. Science

    3 CaSO4 + 2 AlCl3 Al2(SO4)3 + 3 CaCl2 How many moles of aluminum chloride are required to produce 97.0 g of calcuim chloride in the above reaction?

    asked by Catherine
  18. AP Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

    asked by Tony
  19. BIOLOGY!

    In order to keep veggies crisp, grocery stores use coold water or ice. Which would keep veggies crisper, tap water or distilled water? Explain. I have no idea...

    asked by Anonymous
  20. math

    how many factors are in the multiplication sentence: 9 x 4 = 36?

    asked by shy
  21. physics

    A cannon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5 m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

    asked by tammy mikols
  22. math

    the perimeter of the rectangular shaped base of a piano is 16 feet. what are all the possible dimensions of the piano using only whole numbers?

    asked by alaysia jones
  23. Physics

    An airtight box, having a lid of area 12 in2, is partially evacuated. Atmospheric pressure is 15 lb/in2. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:

    asked by Ken
  24. high school

    The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of N.

    asked by Sangita
  25. physics

    a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached

    asked by Anonymous
  26. Physics

    A 44.0 kgseal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75 m higher than the surface of the water and the ramp is inclined at an angle of 35. degrees above the horizontal. If the seal reaches the water

    asked by Lisa
  27. 11th grade

    A reflecting telescope contains a mirror shaped like a paraboloid of revolution. If the mirror is 4 inches across at its opening and is 3 inches deep, where will the collected light be concentrated?

    asked by katie
  28. Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

    asked by Ken
  29. 11th grade

    A thunderstorm has an electric field one night of 1.5 105 N/C. What is the magnitude of the electric force on an electron in such a field?

    asked by jesse
  30. Physics

    Water (density = 1.0 × 103 kg/m3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0m/s and at the narrow end it is 5.0 m/s. The difference is pressure between the two ends is:

    asked by Sammy
  31. CHEMSIRTY

    How much energy would it take to warm 30.0 g of water at 35 oC to the boiling point and boil all the liquid away?

    asked by Miranda
  32. business research

    a. Employee job satisfaction (high, normal, low) and employee success (0-2 promotions, 3-5 promotions, 5+ promotions) are to be studied in three different departments of a company. b. Consumers making a brand choice decision between three brands of coffee

    asked by CL
  33. Calculus AB

    A police car is chasing a suspect. The policemen is at point y=0.6 (north of an intersection) and the suspect is at point x=0.8 (east of the intersection). The police car is traveling at 60mph. Their radar gun reads that the suspect's car is getting away

    asked by Matt
  34. algebra

    six people are going to be seated in a row of 8 chairs. how many different ways may they be seated?

    asked by tyler
  35. Science

    Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c salt and pepper d)sand and pebbles e)sugar and water 2. List several

    asked by Saquta
  36. US History

    The passage is an excerpt from President Bill Clinton’s State of the Union address in January 1998. . . . As we enter the twenty-first century, the global economy requires us to seek opportunity not just at home, but in all markets of the world. We must

    asked by anonymous
  37. Math

    A nanometer is a unit equal to 0.000000001 meter. Write a expression to represents this number is scientific notation

    asked by Lisa
  38. writing in math

    I need help writing a multiplication story with the factors 2 and 5.

    asked by shy
  39. math

    rudy went to the mall to spend some of his money he earned. he spent 1/3 of his money o n a new shirt. He then went to to the music store and bought a cd with 1/3 he had left. At dvds to go he bought a dvd with 1/3 of the money he had left. He stopped once

    asked by lisa
  40. phsyics

    A 8.0×10−2-{\rm kg} toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.30 m/s in a horizontal circle of radius 0.41 m, Find the angle the string makes with the vertical.

    asked by Lisa
  41. algebra

    Six people are going to be seated in a row of 8 chairs. How many different ways may they be seated?

    asked by mw
  42. algebra

    Solve by the linear combination method (with or without multiplication). 4g + 5h = 4 8g – 10h = 4

    asked by geddy
  43. chem/plz/check work studying for a final

    what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L

    asked by julia
  44. Stats

    Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the

    asked by Todd
  45. helping abused children

    what happens in most cases of sexual abuse a-the abuser is removed immediatley from the home b-the abuser is prosecuted in court c-nothing can be done until evidence is found d-the abuser receive institutuional counseling as a precautionary measure

    asked by anna
  46. Math

    segment yw is perpendicular to segment xz. the perimeter of triangle xyz is 71 meters. what is the length of segment wz

    asked by Lexi
  47. physics

    An electron starts at rest. Gravity accelerates the electron in the negative y direction at 9.80 m/s2 while an electric field accelerates it in the positive x direction at 3.80×106 m/s2. Find its velocity 2.45 s after it starts to move.

    asked by tammy mikols
  48. algebra

    Solve by the linear combination method (with or without multiplication). x + y = 50 0.05x + 0.06y = 2.8

    asked by geddy
  49. Physics

    A constriction in a pipe reduces its diameter from 4.0 cm to 2.0 cm. Where the pipe is wide The fluid velocity is 8.0m/s. Where it is narrow the fluid velocity is:

    asked by Sammy
  50. Physics

    The angular speed of an automobile engine is increased at a constant rate from 1200rev/min to 3000rev/min in 12s. How many revolutions does the engine make in this 12s interval? I worked it out to be 25200 rev. Is that right?

    asked by MT
  51. chem/plz/check work studying for a final

    what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L

    asked by julia
  52. algebra

    Solve by the linear combination method (with or without multiplication). 3x-5y = 7 2x + 3y = 30

    asked by geddy
  53. chemistry

    how many grams of water can be formed when 28.7 grams of CH4 reacts with 45.8 grams of O2

    asked by mickey
  54. chemistry

    suppose you have an unknown gas, and wish to determine whether it may be ammonia, hydrogen or carbon dioxide. Describe tests you might use to prove the existence of each of these gases.

    asked by jake
  55. math

    to identical jars are filled with equal amount of marbles. the marbles are coloured red or white. the ratio of red to white marblesis 7:1 in jar 1 and 9:1 in jar 2 if there are 90 marbles altogether, determin the number of red marbles in jar 2.

    asked by Gorege
  56. Statistics and Probability

    One six-sided fair die is rolled, and one two-sided fair coin is tossed. If the coin turns up heads, then the number of spots showing on the die is the value (score) for that trial. If the coin is tails then twice the number of spots showing on the die is

    asked by Laura
  57. Physics

    I have ten problems left on my homework that I need help with. My instructor gives us the answer and we have to write down the steps. So if anyone could help me I would really appreciate it. 1 A steel wire, 150 m long at 10°C, has a coefficient of linear

    asked by Jesse
  58. us history

    which type of government has the power to make marriage and divorce laws? the power to declare home rule belongs to with type of government? who has the power to relate educatoin? who has the power of local government that is not shared with the state

    asked by ?
  59. spanish

    Que tienes que comprar para el cumpleanos de una pariente?

    asked by Morgan
  60. geometry

    Triangle ABC has the following angle measures. Angle A = 44. Angle B = 4x. Angle C = 2x + 16. Find the measure of angle C.

    asked by jess
  61. chemistry

    how many grams of water can be formed when 28.7 grams of CH4 reacts with 45.8 grams of O2

    asked by mickey
  62. Intermediate Algebra

    in 1920 the record for a certain race was 45.7 seconds. In 1930, it was 45.4 seconds. Let R(t)= the record in the race and t = the number of years since 1920. Find the linear function that fits the data.R(t)=__ (round to nearest hundreth. What is the

    asked by Vienna
  63. us history

    when did the siminole wars begin.who was the simenole leader who led his tribe in order to keep siminole lands and homes in florida.what florida county did the siminoles fight the ameracen colinist over or tell me what the answers are in florida studies

    asked by daniel 4th grade
  64. Science

    I have been waiting for 30 minutes and noone has answered this question. Please help me! Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and

    asked by Saquta
  65. physics

    A vertical spring with constant 830 N/m has a ball of mass 3 kg attached to the bottom of it, which is held with the spring unstretched. (a) How far must the ball be lowered to reach its equilibrium position? (b) The ball is given a charge of 0.060 C. If

    asked by Jessica
  66. Physics

    One cm of a 10-cm-long rod is made of metal, and the rest is wood. The metal has a density of 5000 kg/m3 and the wood has a density of 500 kg/m3. When the rod is set into pure water, the metal part points downward. How much of the rod is underwater?

    asked by Sara
  67. physics

    A 4000 kg truck traveling at constant velocity and a braking force of 20000 N is suddenly applied. It takes 6 seconds for the truck to stop. a) what is the deceleration of the truck? b) what is the velocity of the truck before the brakes were applied c)

    asked by jldrew
  68. marketing

    ) According to the text, marketing means:

    asked by Anonymous
  69. physics

    In hitting a stationary pool ball with the mass of 170 g, a billiards player gives the ball impulse of 6.0 N-s. At what speed will the pool ball move toward the hole?

    asked by Robert
  70. 7th math

    At the mall, you spent a total of $170.86. You bought 2 pairs of jeans for $ 39.95 each,a jacket for $45.99, and shirts for 14.99each. How many shirts did you buy

    asked by Daniel
  71. 7th Grade Math-Exponents

    I don't understand this at all! Please help! Find the units digit for 7^197 without using a calculator. Explain how you found your answer.

    asked by Amber
  72. Physics

    A hill is 290 m long and makes an angle of 10 degrees with the horizontal. As a 68 kg jogger runs up the hill, how much work does gravity do on the jogger?

    asked by Casey
  73. Ap Physics

    a 70 kg object sits without sliding on a horizontal platform that rotates at a constant rate of one revolution every 6 seconds about a fixed vertical axis. The object moves on a circle of radius r=2m. If meu is now .4 what is the max distance from the

    asked by Emily Gutenber
  74. math

    Find the range of possible measures if each set of expressions represents measures of the sides of a triangle:x 2x+10, x+8

    asked by bob
  75. science

    how much energy is required to obtain superheated steam at 115 degrees celcius from 25 grams of water at 10 degrees celcius?

    asked by Tyler
  76. Math

    write the converse and contrapositive for the conditional statement below. decide whether each of the three statements is true or false. provide a counterexample for any false statement. If n is a prime number, then n+1 is an even number

    asked by bobby
  77. algebra

    two runners jog around an oval path at constant rates, but in opposite direstions. one runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? express answer

    asked by Tom
  78. Calculus

    A particle is moving around the unit circle radius = 1, at .6,.8 the horizontal velocity sx/st=3, what is vertical velocity dy/dt at that point?

    asked by J.
  79. Fine Art

    9. Features including easily understood symbols, illumination, and colorful shapes are common in a. paintings from the Gothic period b. paintings from the Romanesque period c. Islamic art d. paintings done by monks A 17. Because of the style of some

    asked by mysterychicken
  80. calculus

    Find the volume of the solid whose base of a solid is the region bounded bythegraphsofy=3x,y=6,andx=0. Thecross␣sections perpendicular to the x ␣ axis are rectangles of perimeter 20.

    asked by Ashley
  81. physics

    A person in an elevator is holding a 13 kg block by a cord rated to withstand a tension of 226 N. When the elevator starts up, the cord breaks. What was the minimum acceleration of the elevator?

    asked by Georgia
  82. English

    1. Our school play club will put on a play Nasrredin and the Fish. 2. Our school play club will perform a play Nasrredin and the Fish. 3. Our school play club will resent a play Nasrredin and the Fish. (Are they the same? Does 'put on' mean 'perform? Why

    asked by rfvv
  83. trig

    prove the identity: csc x-1/csc x+1 = cot^x/csc^x+2 csc x+1

    asked by shela
  84. algebra

    Solve by the linear combination method (with or without multiplication). 6x \-2y = 2 3x + 4y =-5

    asked by geddy
  85. physics

    an electron is moving in a circular path of radius 1500 m perpendicular to a 2000 T magnetic fieldWhat is the tangential velocity of the electron?

    asked by twan
  86. 7th grade

    what is the volume of a cylinder of a diameter 10cm and a height of 10cm

    asked by Anonymous
  87. chem/plz/check work studying for a final

    A 20.5 lb cast iron boat anchor displaces 1.33 qt of water when submerged. What is the density of the cast iron, in g/cm3? 1L=1.057 qt 1kg=2.205lb 1lb=453.6g 20.5lb X 453.6g/ 1lb = 9298.9g 1.33qt X 1L/1.057qt = 1.26L 1.26L X 1000cm3/1L = 1260cm3

    asked by julia
  88. 11th grade

    Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 215 miles above the surface of Earth. Use the rule of thumb that

    asked by Vanessa
  89. Calculus

    Find the slope-predictor formula and write an equation for the line tangent to (a, f(a)) for f(x) = x2 - 6x + 4. Make sure you detail the process.

    asked by Brian Meredith
  90. math

    Given the linear equation y=-3/2x+1, find the y-coordinates of the points (-4), (-2), and (6). Please show all of your work. Plot those points and graph the linear equation.

    asked by Allie
  91. Math

    Simplify each expression. You may use the properties to help. When you type your answer, do not space between numbers and symbols. (4a)(5b)(6c)?

    asked by Andrew
  92. Math-7th grade

    Im having trouble solving the amount per day... The table below shows the relationship between d, the number of days a DVD is returned late to a video rental store, and f, the amount of the late fee. Write an algebraic expression that describes this

    asked by Amber
  93. 7th grade

    There were 31 students who completed a survey. There were 13 boys and 18 girls. One survey was picked at random. To the nearest hundredth, what is the probability it was completed by a girl?

    asked by Anonymous
  94. Physics

    An airtight box, having a lid of area 12 in2, is partially evacuated. Atmospheric pressure is 15 lb/in2. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:

    asked by Sammy
  95. physics

    A person in an elevator is holding a 13 kg block by a cord rated to withstand a tension of 226 N. When the elevator starts up, the cord breaks. What was the minimum acceleration of the elevator?

    asked by Georgia
  96. 8th grade math

    Every year on the first day of Christmas my true love gives me one gift, a partridge in a pear tree. On the second day of Christmas my true love gives me a total of three gifts, two turtle doves and a partridge in a pear tree. This will go on until the

    asked by Anonymous
  97. algebra 1

    In a triangle ABC,angle b is 4 times angle "A" and angle "C" IS 17 less than 5 times angle "A". Find the size of the angles.

    asked by esther
  98. chemistry

    a given volume of a gas is at a temperature of zero degrees celsius. to what temperature must it be heated in order to double its volume and pressure?

    asked by danny boan
  99. Chemistry

    If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 + K2S ---> CoS + 2KNO3

    asked by Brittany
  100. Physics

    An isolated 3 kg object is moving in the positive y direction along the -y axis at 2 m/s; when it reaches the origin it breaks into two pieces sending a 1 kg fragment in the +y direction at a speed of 3.7 m/s. what are the velocity and direction of the

    asked by Sophie
  101. english

    I need help ASAP on this im writting a 6 paragraph essay and its due tomorrow i cant even think of a thesis its "Discuss the irony as its used in Animal Farm Be sure to give specific details from the novel." I need help ASSSSAAPP! I didn't realize before

    asked by Javay
  102. physics

    The student undergoes a second displacement of 5.0 meters at an angle of 45 degrees SOUTH of EAST. The x component, (EAST WEST) of the total displacement is_

    asked by Anonymous
  103. algebra

    Two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? Express your

    asked by mw
  104. English

    Posted by rfvv on Thursday, December 16, 2010 at 3:21am. {At a restaursant} For hear or to go? Is this for here or to go? It's for here, please. It is to go, please. (Are the expressions above all grammatical? What is the meaning of 'is to' in 'It is to

    asked by rfvv
  105. english: greek mythology

    In the story Prometheus (he steals fire and gives it to humans), What human qualities do Prometheus and Zeus have? What is the significance of these gods having human qualities? please just point out a few qualities for each and some quotes that show

    asked by Rose
  106. algebra

    write the product of 35/14 x 3/125 in scientific notation

    asked by ty
  107. 8th grade algebra

    write a function to describe each statment buying apples for $.89 a lb

    asked by haywood
  108. Fine Art

    9. Features including easily understood symbols, illumination, and colorful shapes are common in a. paintings from the Gothic period b. paintings from the Romanesque period c. Islamic art d. paintings done by monks A 17. Because of the style of some

    asked by mysterychicken
  109. Math

    The distance from the center of the Ferrus wheel to a passenger car is 328 feet. What is the approximate distance a passenger travels in 3 full rotations during the ride?

    asked by Alyson
  110. chemistry

    The combustion of 38.5g of C2H6 with excess oxygen. Find the equation, balance equation and find the mass of each product

    asked by hbluefrost
  111. calculus

    Find the second derivative of the function: y=e^-2t*cos^2(t+(pi/4))

    asked by ireallyneedhelp
  112. Calculus AB

    Evaluate the following derivatives at the given points. Find the equation of the line tangent at each point. a) f(x)=ln(secx) @ x=pi/3 b) f(x)=(root(x+1))/(x-1) @ x=0

    asked by ireallyneedhelp
  113. math

    what is 7 16th plus 3 8th please help me i am hopeless

    asked by leah
  114. algebra

    Solve by the linear combination method (with or without multiplication). 4x-5y =-18 3x + 2y =-2

    asked by geddy
  115. Statistics

    An adverting firm wishes to demonstrate to its clients the effectiveness of the advertising campaigns it has conducted. Using x as cost in millions of dollars: 3.5o, 3.05, 3.64, 1.59, 3.21, 2.12, 2.07, 3.99,1.58, 3.01, 1.36, 2.24; y for increases in sales:

    asked by Angel MW
  116. Physics

    a 60 kg person falls off a 15 kg sled moving at 2 m/s. The person doesn't move after falling. Assuming no friction with the ice, and not other net forces acting on the sled, what is the change in velocity of the sled after the person falls off.

    asked by Sophie
  117. 9th grade science

    where are the cell and plasma membranes located

    asked by Miranda
  118. chem

    100 grams of sodium phosphate contains how many sodium ions? what is the formula?

    asked by shane
  119. math

    a principle of $16,000 is invested at 8% and earns $8,320. simple interest. How long has the money been invested

    asked by Anonymous
  120. physics

    The student undergoes a second displacement of 5.0 meters at an angle of 45 degrees SOUTH of EAST. The x component, (EAST WEST) of the total displacement is_

    asked by mohamed mokhbat
  121. business

    use five verbs and five adjectives write a 150-300 word review of a movie,sporting,event

    asked by marquita
  122. Chemistry

    If one were to mix 200.0 mL of an HCl solution that had a pH of 3.00 with 200.0 mL of an NaOH solution that had a pH of 10.00, what would be the pH of the final solution? Can you show me the steps please so that I can apply to questions that ask for the

    asked by Anonymous
  123. Algebra 1

    -p/-7>-9 What is p? For solving inequalities.

    asked by Lauren
  124. biology

    explain why salt can be used as a weed killer.

    asked by Anonymous
  125. Math

    a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly

    asked by Jimmy
  126. algebra

    Write the product of 35/14 x 3/125 in scientific notation.

    asked by ty
  127. Math

    prove that the difference of squares of any two odd numbers is divisible by 4. (first list at least 3 examples to support this statement.)

    asked by Henry
  128. geometry

    a wheelchair ramp has an angle of 4.5,what is the horizontal distance needed to have a vertical rise of 1 foot?

    asked by Chloe'
  129. English

    Here are some more sentences I need you to check. 1) Translate the following verbs then write the past simple and the past participle of each verb. 2) Write four questions each including a verb mentioned above. 3) Witches were suspected of casting spells

    asked by Franco
  130. 5th grade

    what is the magnitude estimate for 78.6 divided by 6

    asked by matt
  131. math

    when will the line .5(x)-87 and .4(x)-34.8 meet on a graph

    asked by karlyn
  132. chemistry

    a certain volume of a gas at 125K was heated such that its volume and pressure became four times their original values. what is the new temperature of the gas?

    asked by danny boan
  133. Calculus AB

    Find the equation of the line tangent to the curve at t=pi/3: a) x=t-sin(t) b) y=1-cos(t)

    asked by ireallyneedhelp
  134. calculus

    Use implicit differentiation to find dy/dx: a) xrooty-ye^x=1 b) sinxy + ln y=x

    asked by ireallyneedhelp
  135. AP Calculus

    A line is perpendicular to 2x+y-7=0 and passes through (4,6). Find the y coordinate of the point where x=-8

    asked by bri
  136. Science

    My answers are at the bottom. Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and water b)oil and water c salt and pepper d)sand and pebbles

    asked by Saquta
  137. Math

    Elanor wants to purchase two art posters. One poster costs $4.85 and the other poster costs $15.00. There is sale at the store for 20% off each item, and there is 5% sales tax. Find the approximate amount that she has to pay for the two posters

    asked by PHelp
  138. calculus

    find deriviative using definition lim x heads toward a of f(x)-f(a)/ (x-a) of x^5

    asked by Anonymous
  139. Calculus

    Find dy/dx, y= -7e^6x+11 + xe^x

    asked by Hannah
  140. geometry

    Given: ÚA≅ÚBDE; AB x DE = AD x BD Prove: AB x CD = AD x BC

    asked by kristie
  141. World History

    Can you summarize and answer these: •a brief definition of the Second Industrial Revolution •a description of urban life and the problems created by industrialization •measures workers took to improve conditions •technological innovations that

    asked by Joan
  142. chem/plz/check work studying for a final

    23. A 32.3 L sample of a gas at 305oC and 1.20 atm is to be cooled at constant pressure until its volume becomes 28.4L. What will be the new gas temperature? Tf = Vf*Ti/Vi Tf =28.4L x (305+273)K / 32.3L = (28.4)(578)K / 32.3 = 16415.2/32.3 Tf = 508K I got

    asked by julia
  143. trig

    triangle has sides 200,172 and155 find area

    asked by john
  144. 4th grade

    how many 8 ounce servings can be created from a six pack of 12 ounce fruit drinks

    asked by dk
  145. free enter

    true or false the assembly line uses a division of labor

    asked by tyler
  146. Health

    what negative physical problems is specifically associated with how heroin is taken?

    asked by Betty
  147. Healthcare

    What current issues affect positive communication in health care organizations today?

    asked by DeeDee
  148. algebra

    How many cubic feet are inthe volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? Express your answer in tterms of pi.

    asked by mw
  149. English

    I just need to know if the sentences are possible (especially the ones in parentheses). I'm sending you the first five. 1)During the Middle Ages witchcraft was regarded as an offence against the State. Henry VIII imposed the death sentence for witchcraft.

    asked by Franco
  150. math

    how do i know if the points of the boundary line of a graph are on the boundary line or if they are below it?

    asked by william clemons
  151. World History

    I'm comparing three different authors views on why the "rise of the west" occured in the 19th century. i have to compare ander gunder frank's "reorient", kenneth pomeranz' "the great divergence" and jack goldstone's "Why Europe? the rise of the west in

    asked by Nicole
  152. chemistry

    What is the pH of a solution prepared to contain 155 grams of HCl in 200.0 mL? Can you tell me how to do it? I can't remember how...

    asked by Claudia
  153. Math

    suppose you inves $8000 and the value grows to $12000 in 10 years. What yearly interest did you earn assuming that interest is coumpounding continuously?

    asked by Jeri
  154. poetry/song

    My group member and i changed some lyrics with this christmas song so it relates to something about gov. Congress, You better watch out, You better not cry, You bettre not pout, We're telling you why The veto is coming to town He's reviewing your bill and

    asked by Song for AP Government
  155. Math

    A truck tire travels about 11 feets in 1 full rotation. What is the diameter of the wheel, to the nearest inch?

    asked by Help
  156. Math

    convert 12.44 as a percent and as a fraction

    asked by Anonymous
  157. Math

    The glass in a frame has an area of 91 m sqaurd. If the window length is 14 m, what is the window height?

    asked by Lisa
  158. English

    {At a restaursant} For hear or to go? Is this for here or to go? It's for here, please. It is to go, please. (Are the expressions above all grammatical? What is the meaning of 'is to' in 'It is to go, please.'? Does it mean 'must'? That is, "It (the food)

    asked by rfvv
  159. polymer science

    how the strength polymer need for polymer electrolyte prepatation

    asked by pradee
  160. Calculus AB

    Calculate dy/dx at the point t=10 for the equations: a) x=5t b) (t^2)-1

    asked by ireallyneedhelp
  161. Math

    A measuring cup can hold 2 cups of water. There are 1 1/8 cups of water in it now. How much more water can it hold?

    asked by DeeBee
  162. Communications

    Techniques for Creating Behavior Change in a Staff Member

    asked by tina
  163. History Help Please!!!

    i'm writing a paper on the Bolivarian Alternative for the Nations of Our America and I need to tie in a leaked U.S. document that referred to particular countries called the "Axis of Mischief." I can't find one, could you please help??

    asked by brett
  164. Math

    Trail Mix and Number of people A - 27 people B- 33 people Write a proportion that can be used to predict the number of people x who would choose Mix A out of 300 people

    asked by PHelp
  165. math 116

    Simplify. -2[38-(-56-50)]=

    asked by sue
  166. Chemistry URGENT

    If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 + K2S ---> CoS + 2KNO

    asked by Brittany
  167. Math

    make a conjecture (obsevations based on patterns) for each sequence below. a)7,10,13,16 b)4,44,444,4444,44444 c)2,10,50,250 d)1,2,6,42,1806,3263442

    asked by Kale
  168. algebra

    how many cubic feet are in the volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? express answer in terms of pi.

    asked by tyler
  169. algebra

    Compute: 7!/6! x 3!2!/(8-1)! express answer as acommon fraction.

    asked by tyler
  170. physics

    The force acts on a 1.2kg object at 120m/s. The direction of the force is aligned with the velocity. What is the new velocity of the object

    asked by Sarah
  171. math

    If the average of 11 numbers are 20 and the average of 3 numbers are 48, what is the average of all the numbers.(

    asked by Anonymous
  172. Business math

    21,000*5%*1 and three fourths of a year

    asked by Charlene
  173. 10th grade

    I need help ASAP on this im writting a 6 paragraph essay and its due tomorrow i cant even think of a thesis its "Discuss the irony as its used in Animal Farm Be sure to give specific details from the novel." I need help ASSSSAAPP!

    asked by Javay
  174. physics

    as an object is dropped from a high cliff, which of the following statistics can be made in regard to the objects potential energy?

    asked by katie
  175. physics

    A rock is dropped. How fast will the 5.0 kg rock be traveling in 4.0s if a 5.o N force of air resistance acts on it?

    asked by Nate
  176. Math

    prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.

    asked by bob
  177. Healthcare

    What current issues affect positive communication in health care organizations today?

    asked by DeeDee
  178. language arts

    a 10 to 15 line pome about a mom

    asked by chy
  179. adult education

    use lattice multiplication to find the prduct of 124 x 56

    asked by molly
  180. pre calculus

    Write the trigonometric expression in terms of sine and cosine, and then simplify. cot(x)/csc(x)-sin(x)

    asked by chris
  181. Math117

    Is this equation correct: (x y)3 = x y3 ? Explain why. If it is correct, how can you prove this? If it is incorrect, what should be done to make it right?

    asked by Sherine
  182. us history

    when did the siminole wars begin.who was the simenole leader who led his tribe in order to keep siminole lands and homes in florida.what florida county did the siminoles fight the ameracen colinist over

    asked by daniel 4th grade
  183. medical

    an objective sign is one that 1. can be observed by another person. 2. precedes a disease 3. is felt by the patient and can't be observed by another person 4. causes the patient the most trouble

    asked by Angela
  184. calculus

    Find the volume of the solid whose base of a solid is the region bounded bythegraphsofy=3x,y=6,andx=0. Thecross␣sections perpendicular to the x ␣ axis are rectangles of perimeter 20.

    asked by Ashley
  185. Math

    I am a square number divided. I am an odd number. I appear more than once in the table. What dividend am I?

    asked by Bernadette
  186. algebra 1

    In a triangle ABC,angle b is 4 times angle "A" and angle "C" IS 17 less than 5 times angle "A". Find the size of the angles.

    asked by esther
  187. History

    Writing of grito de Dolores and petition of the first continental congress?

    asked by Jim
  188. English

    1. We need to prepare food inorder to take a party. 2. We need to prepare food inorder to have a party. 3. We need to prepare food inorder to throw a party. (Are they all grammatical? Would you take a look at the verbs?)

    asked by rfvv
  189. Math

    A pizza parlor has 2 1/2 pizzas left. Each pizza originally has 8 slices. How many slices are left?

    asked by Lisa
  190. Math

    The equation Ax^2 + 4y^2 = 16 represents an ellipse. Find all values of A such that its intersection with y = |x| has coordinates (x,y) which are integers.

    asked by Andy
  191. Science

    What are some filters in your home? What's the purpose of each filter?

    asked by Pratigya
  192. physics

    A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?

    asked by haresh
  193. Health Care

    I need help with a team powerpoint on Health Care Costs and need to do 3-4 slides with speaker notes on Recommendations for Improvement

    asked by Donna
  194. History Help Please!!!

    Ms. Sue, I don't think that is what he wants. He seems to be asking for a particular document.

    asked by Brett
  195. History help

    Can you summarize and answer these: •a brief definition of the Second Industrial Revolution •a description of urban life and the problems created by industrialization •measures workers took to improve conditions •technological innovations that

    asked by Joan
  196. social studies

    the blank blank shows the main directions, which are called the blank directions.

    asked by kaylyn
  197. Algebra/functions

    PLEASE HELP. I wanted to put effort into this problem just need confirmation. F(x) = 2 x^2 - 2x; F(0) = 0 F (-1)= 6 F(2) = 4 Thank you

    asked by Amy
  198. Chemistry!!

    How many moles of Mg are there in 4.00 L of a 0.500 M solution of MgCl2?

    asked by margrav2
  199. Math

    complete the pattern 3 8 13 18 23 what three numbers come next?

    asked by Tiffany
  200. English

    I need help writting a thesis statement

    asked by Javay
  201. Math

    5^1=5 5^2=25 5^3=125 using patterns determine the last 3 digits of 5^100

    asked by Blake
  202. Math

    start with the word RODE. change one letter at a time to form a new until u have the word FILM. the best solution has the fewest steps.

    asked by walter
  203. high school

    From the reading and video Jurgis truly believed in the American Dream: What was the American Dream? How did the Meat Packing Industry and Jurgis's experiences destroy that myth?

    asked by The Jungle by Upton SInclair
  204. English

    Can you please chech the following sentences for me? Thank you very much. 1)During the Middle Ages witchcraft was regarded as an offence against the State. Henry VIII imposed the death sentence for witchcraft. (Rephrase: Henry VIII had witches sentenced to

    asked by Franco
  205. SCIENCE

    WHAT IS THE WEIGHT OF THE HUMAN BRAIN IN GRAMS?

    asked by ANTONIO
  206. Healthcare

    What current issues affect positive communication in health care organizations today?

    asked by DeeDee
  207. social studies

    when did the siminole wars begin.who was the simenole leader who led his tribe in order to keep siminole lands and homes in florida.what florida county did the siminoles fight the ameracen colinist over

    asked by Anonymous
  208. calculus

    how is the lim as x heads towards infinity of 3/(1+(3/x) equal to 3?

    asked by Anonymous
  209. 8th grade

    how do i know if all of the points are on the boundary line or they are all below it?

    asked by william clemons
  210. independent high school

    4x-5

    asked by nerrisa
  211. statistics probablity

    Each time that Ed Charges an expense to his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the

    asked by Joe
  212. 11th grade math

    Using the formula 4.9t^2... A object is dropped how long will it take it to fall 92 meters

    asked by ALI
  213. Spanish

    for the verbs ending in car, gar, zar i thought you only change the "yo" form but i learned that for conjugar becomes conjuguen. would that be in the present and not preterite?

    asked by Amy
  214. science

    scientific name of flower lotus?

    asked by Dev
  215. math

    Jim divied -2 by an integer and his result was between -1 and 0 Which integur could have been the divisor

    asked by Anna
  216. Chemistry!! Please Help

    How many grams of chloride are present in 1.00 liter of a 1.5 M solution of CaCl2?

    asked by margrav2
  217. 4th grade

    ms plants wants to place a fence around a garden that measures 12 feet by 20 feet. how much fencing does she need for the perimeter of the garden.

    asked by dk
  218. math

    find the slope and y-intercept of the line in the given equation: y=6/7x-4

    asked by Allie
  219. Algebra 1

    5n-8 is < or = to 2n+10 What is n?

    asked by Lauren
  220. SCIENCE

    NUMBER OF CHAMBERS IN THE HUMAN HEART?

    asked by ANTONIO
  221. Algebra 1

    -y

    asked by Lauren
  222. Social Studies ASAP!!!

    Where can I find letters about soliders in the American Revolution (Solider Writing about his life in the REevolution)

    asked by Sumaiya
  223. History- Seperation of Quebec

    What would happen to all the members of parliament from Quebec if they separated? Would the prime minister be the leader of canada even though they don't hold a seat in the house of common?

    asked by Anonymous