Questions Asked in October 2011

Most Popular Questions of October 2011

  1. English check please help me out

    My answers: 1. Suffice 2. Sinister 3. Intricate 4. Incoherent 5. Implausible 6. Degenerate 7. Intercede 8. Sanctuary 9. Vulnerable 10. Scrutiny One summer, Nan worked in a factory with an employee who had recently arrived from France, a soft spoken young

    asked by ME on October 6, 2011
  2. vocab

    The living room looked immaculate except for a lump under the carpet, an gaunt

    asked by me on October 19, 2011
  3. Chemistry

    How many grams of dry NH4Cl need to be added to 2.10L of a 0.600M solution of ammonia,NH3 , to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8x10^-5. I just wanted to make sure I dd this write, can you please check my work? Thank

    asked by Jessica on October 8, 2011
  4. Calculus

    Suppose that p(x) is the density function for heights of American men, in inches, and suppose that p(69)=0.22. Think carefully about what the meaning of this mathematical statement is. (a) Approximately what percent of American men are between 68.7 and

    asked by Cesar on October 27, 2011
  5. Chemistry

    Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq). I know the most acidic solution has the lowest pH and the most basic solution has the highest pH. But how am i supposed to know the pH if i don't

    asked by Nia on October 17, 2011
  6. Chemistry

    Write the net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hydrobromic acid are combined. I know that the first part of the formula would be BaOH + HBr but I do not know what the product would be since HBr is

    asked by Hannah on October 9, 2011
  7. physics

    A father racing his son has 1/3 the kinetic energy of the son, who has 1/3 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son?

    asked by nan on October 3, 2011
  8. chemistry 105

    Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)-->2LiN(s) What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?

    asked by JULIE on October 23, 2011
  9. chemistry

    In Chemistry: what is ph during the titration of 20.00ml of 0.1000m triethylamine (ch3ch2)3n (kb=5.2x 10-4) with 0.1000m HCL solution after the additions of titrant : a) 0ml (b) 10.00ml (c) 19.00ml (d)15.00ml (e) 20.00ml (f) 25.00ml

    asked by jain on October 17, 2011
  10. Math

    The numerator of a fraction is two less than its denominator. When both numerator and denominator are increased by 3, the fraction is incre ased by 3/20. Find the original fraction. Pls include solution and workings thx :)

    asked by Ghiffari on October 24, 2011
  11. College Chemistry

    Write formation reactions for the following. (You must include the states of matter for each atom or compound) A. Ca(NO3)2 (s) B. CH3OH (l) C. NaClO4(s)

    asked by Bekah on October 25, 2011
  12. Chemistry

    (a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to

    asked by Anon on October 31, 2011
  13. Calc

    If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will

    asked by Katrina on October 17, 2011
  14. Chemistry

    If you have 320.0 mL of water at 25.00 °C and add 110.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

    asked by Ryan on October 18, 2011
  15. Chemistry

    Each value below represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or neutral. pH=9.72 pOH=4.69 pOH=13.62 [H+]=7.5e-2 [H+]=7.8e-9 [H+]=1e-7 [OH-]=4.5e-12 [OH-]=3.5e-5 pH=4.09 pOH=7

    asked by Niloo on October 20, 2011
  16. Stoichiometry

    Find the limiting reactant for the initial quantities of reactants 2k(s) + Cl2(g)--> 2KCl(s) 1.8 mol K; 1 mol Cl2 I'm lost

    asked by Monique on October 4, 2011
  17. science

    What would happen if blood entering the heart mixed with blood leaving the heart?

    asked by brandon on October 27, 2011
  18. Calculus

    Find the linearization L(x) of y=e^(7x)ln(x) at a=1. L(x)=

    asked by Reonea on October 30, 2011
  19. Finance

    Nico Trading corporation is considering issuing long-term debt. The debt would have a 30 year maturity an a 10 percent coupon rate. In order to sell the issue, the bonds must be underpriced at a discount of 5 percent of face value. In addition, the firm

    asked by matt on October 19, 2011
  20. Physics 3

    A potential energy function for a two-dimensional force is of the form U = 3x3y – 7x. Find the force that acts at the point (x, y).

    asked by Anonymous on October 20, 2011
  21. Stoichiometry

    Consider the reaction between reactants S & O2 2S(s) + 3 O2(g) ==> 2 SO3(g) If a reactant vessel initially contains 5 mol S and 9 mol O2, how many moles of S, O2 and SO3 will be in the reaction vessel once the reactants have reached as much as possible?

    asked by Monique on October 4, 2011
  22. calculus II SURFACE AREA Integration

    Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sqrt(1 + 5x) from 1 ≤ x ≤ 7

    asked by Michael on October 31, 2011
  23. Stoichiometry

    For each precipitation reaction, calculate how many grams of the first reactant are necessary to completely react with 17.3 g of the second reactant. 2KI(aq) + Pb(NO3)2(aq)--->PbI2(s) + 2KNO3(aq) Not looking for the answer I really want to know if I did it

    asked by Monique on October 4, 2011
  24. chemistry

    Write the balanced molecular, complete ionic, and net ionic equations for the following reactions in aqueous solution: a. magnesium chloride reacts with potassium carbonate b. sulfuric acid reacts with sodium hydroxide

    asked by gold on October 13, 2011
  25. arithmetic

    The initial term of an arithmetic sequence is 5. The eleventh term is 125. what is the common difference of the arithmetic sequence?

    asked by Jane on October 25, 2011
  26. Science

    Use the terms atom and element to explain what makes silver and gold different.

    asked by Carlos PLEASE on October 26, 2011
  27. chemistry

    A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per min.(cpm) compared to 40 cpm for new wood. If carbon-14 has a half life of 5730 years what is the age of the wood? Please get me started. Thank you

    asked by Connie on October 19, 2011
  28. general chem

    Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write NR. (a) Nickel metal is added to a solution of copper (II) nitrate; (b) a solution of zinc nitrate is added to a

    asked by rob on October 9, 2011
  29. University Chemistry (first year)

    I'm working on a first year chemistry lab where we synthesized alum from alunimini foil and I'm doing the report and one of the questions is as follows: Based on your findings, what volume of water can be cleared of suspended solids by one beverage can

    asked by clam on October 17, 2011
  30. Physics

    You're driving your pickup truck around a curve with a radius of 22meters. A box in the back of the truck is pressed up against the wall of the truck. -How fast must you drive so that the force of the wall on the box equals the weight of the box?

    asked by Noe Valencia on October 24, 2011
  31. chemistry

    A solution contain 43mEq/L of Cl- and 11 mEq/L of HPO4*2-. If the only cation in the solution is Na+ what is the Na+ concentration if mEq/L? Can you help me with each step to solve this problem?

    asked by Connie on October 14, 2011
  32. math


    asked by may lou on October 3, 2011
  33. Stat Help

    A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 4% if the true proportion. Find the sample necessary if in a prior study, a sample of 200 people showed that 40 traveled overseas

    asked by Shannon on October 6, 2011
  34. chem

    When the valve between the 2.00-L bulb, in which the gas pressure is 2.00 atm, and the 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened, what will be the final pressure in the two bulbs? Assume the temperature remains constan

    asked by ana on October 17, 2011
  35. Physics

    (a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 23.2 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa. Pa (b) What force is exerted by the water on the window of an

    asked by Allie on October 27, 2011
  36. Physics (7)

    A 12-g bullet moving horizontally strikes and remains in a 3.0-kg block initially at rest on the edge of a table. The block, which is initially 80 cm above the floor, strikes the floor a horizontal distance of 120 cm from its initial position. What was the

    asked by Anonymous on October 29, 2011
  37. College Chemistry

    How many milliliters of 0.100 M HNO3 are needed to neutralize the following solutions? A. 45.0 mL of 0.667 M KOH B. 58.5 mL of 0.0100 M Al(OH)3

    asked by Bekah on October 6, 2011
  38. MSU

    aluminum sulfate and sodium phosphate Express your answer as chemical equation.

    asked by Sarah on October 6, 2011
  39. chemistry

    an 8.5g ice cube is placed into 255g of water. Calculate the temp change in the water upon the complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and then use q = mc^T to calculate the temp change of the 255g of water

    asked by Monique on October 23, 2011
  40. physics

    A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 21.12 N. Find the magnitude of the net force exerted by the wire on the crooked tooth.

    asked by sarah on October 5, 2011
  41. science

    how many kilojoules of heat must be transferred to a 480 g aluminum pizza pan to raise its temperature from 22 degree c to 234 degree c? The specific heat of aluminum in this temperature range is 0.97 J/g degree C.

    asked by Justin on October 28, 2011
  42. chemistry

    a)H2SO4 b)CuS c)HF d)Zn(NO3)2 Which are strong, weak, or non electrolytes. I was think A was strong B and C were weak and D is non

    asked by jessica on October 5, 2011
  43. pysics

    A projectile of mass 0.777 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 7.8m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and

    asked by steve on October 4, 2011
  44. pre algebra with pizzazz 239

    why didn't the circus managers want their human cannonball to quit?

    asked by marcus on October 27, 2011
  45. physics

    A 53.5 N object is in free fall. What is the magnitude of the net force which acts on the object? Answer in units of N What is the magnitude of the net force when the object encounters 15.4 N of air resistance? Answer in units of N What is the magnitude of

    asked by amanda on October 20, 2011
  46. Physics w/ Calc

    A baseball approaches home plate at a speed of 43.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 54.0 m/s straight up. The ball has a mass of 145 g and is in

    asked by Lauren on October 16, 2011
  47. Chemistry

    Which of the subshells in the electron configuration of Hf behave as core orbitals Check all that apply 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d

    asked by Caitlin on October 4, 2011
  48. English Lit

    I have two questions about these Emily Dickinson's "Wild Night" 1.Which best describes the rhyme in the second stanza--internal rhyme,slant rhyme,feminine rhyme,descending rhyme or no rhyme Would it be slant rhyme? 2.Which is the following sound device

    asked by Leah on October 7, 2011
  49. Stoichiometry

    So I have this question it reads Consider the generic chemical reaction How many moles of B are required to completely react with 2A + 3B ==> 3C 1. 6 mol of A 2. 2 mol of A I won't put them all just guide me in the right direction please

    asked by Monique on October 5, 2011
  50. statistics

    {Exercise 3.55} Morningstar tracks the total return for a large number of mutual funds. The following table shows the total return and the number of funds for four categories of mutual funds (Morningstar Funds500, 2008). a. Using the number of funds as

    asked by abdull on October 16, 2011
  51. Calculus 1

    A fence is to be built to enclose a rectangular area of 220 square feet. The fence along three sides is to be made of material that costs 6 dollars per foot, and the material for the fourth side costs 13 dollars per foot. Find the dimensions of the

    asked by Olivia on October 31, 2011
  52. general chem

    Determine the oxidation number for the indicated element in each of the following compounds: (a) Co in LiCoO2, (b) Al in NaAlH4, (c) C in CH3OH (methanol), (d) N in GaN, (e) Cl in HClO2, (f) Cr in BaCrO4.

    asked by rob on October 9, 2011
  53. Calculus

    Suppose that p(x) is the density function for heights of American men, in inches, and suppose that p(69)=0.22. Think carefully about what the meaning of this mathematical statement is. (a) Approximately what percent of American men are between 68.7 and

    asked by Cesar on October 28, 2011
  54. ALGEBRA 2


    asked by ANGELO on October 13, 2011
  55. chemistry

    Mg3N2 +6H2O- 3Mg(OH)2 + 2NH3-- How many grams of H2O are needed to produce 150g of Mg(OH)2? I thought I had this but.....the correct answer should be 93 grams Where did I go wrong?? 1) Change 150 g Mg(OH)2 into moles by dividing by molar mass from periodic

    asked by Connie on October 2, 2011
  56. Physics.. please help!!!!!

    A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 16 m/s at angle of 46◦ above the horizontal. The top of the fence is 4 m

    asked by Elle on October 20, 2011
  57. chemistry

    A patient receives 3.0 mL of a solution containing technetium-99m for a breast image. If the activity of the technetium-99m is 9.5mCi/mL what is the dose received by the patient? Answer Choices are: a)29mCi b)3.2mCi c)320uCi d)28.5mCi So I times 3.0mL *

    asked by Connie on October 19, 2011
  58. calculus

    At noon, ship A is 110 km west of ship B. Ship A is sailing east at 25 km/h and ship B is sailing north at 15 km/h. How fast is the distance between the ships changing at 4:00 PM?

    asked by John on October 13, 2011
  59. math

    Find two numbers the exact answer is between. 3 X 567

    asked by andrew on October 5, 2011
  60. chemistry

    Phosphorus trichloride gas and chlorine gas reacts to form phosphorus pentachloride gas: PCL3(g) +CL2(g) = PCL5(g). A vessel is CHARGED WITH A MIXTURE OF PCL3(g) and CL2(g), which is allowed to equilibrate at 450K. At equlibrium the partial pressures of

    asked by MIndy on October 19, 2011
  61. Chemistry

    What do we call the part of the universe that is not part of the system

    asked by Caitlin on October 4, 2011
  62. Calculus

    A rancher plans to make four identical and adjacent rectangular pens against a barn, each with an area of 100m^2. what are the dimensions of each pen that minimize the amount of fence that must be used?

    asked by Anonymous on October 25, 2011
  63. Physics

    A tennis ball on Mars, where the acceleration due to gravity is 0.379 of a and air resistance is negligible, is hit directly upward and returns to the same level 6.20 later. (a)How high above its original point did the ball go? (b)How fast was it moving

    asked by Bojian on October 10, 2011
  64. Physics

    A sled is being held at rest on a slope that makes an angle (theta) with the horizontal. After the sled is released, it slides a distance (d1) down the slope and then covers the distance (d2) along the horizontal terrain before stopping. Find the

    asked by Mary on October 13, 2011

    a) How will the concentration of NaOH be affected if during the titration some of the solid potassium hydrogen phthalate was spilled during the transfer? Will the concentration of the standardized NaOH increase, decrease, or have no effect? b) How will the

    asked by Josh on October 24, 2011
  66. Calculus

    A searchlight rotates at a rate of 2 revolutions per minute. The beam hits a wall located 8 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle between the beam and

    asked by Reonea on October 30, 2011

    1) The specific heat of solid copper is 0.385 J/g(C). What thermal energy change occurs when the temperature of a 34.10 g sample of copper is cooled from 35.7 degrees Celsius to 13.9 degrees Celsius? Answer: -286.3 J This amount of heat is used to melt

    asked by Jen on October 17, 2011
  68. Chemistry

    Without calculating any frequeny values, select the highest frequency transition in the hydrogen atom. 1. From n= 4 to n= 6 2. From n=6 to n=8 3. From n=9 to n=11 4. From n=11 to n=13

    asked by Anonymous on October 22, 2011
  69. math

    A manufacture has been selling 1300 television sets a week at 450 each. A market survey indicates that for each 14 rebate offered to a buyer, the number of sets sold will increase by 140 per week. a) Find the demand function , where is the number of the

    asked by Jim on October 9, 2011
  70. Chemistry

    Complete this table of values for four aqueous solutions at 25 °C. Solution A: [H+]=0.0093M [OH-]=? pH=? pOH=? Solution B: [H+]=?[OH-]=1.4e-6M pH=? pOH=? Solution C: [H+]=?[OH-]=? pH=5.36 pOH=? Solution D: [H+]=?[OH-]=? pH=? pOH=10.14

    asked by Help on October 20, 2011
  71. MATH

    a pile of bricks has 85 bricks in the bottom row, 79 bricks in the second row, 73 in the third row, and so on until there is only 1 brick in the top row. how many bricks are in the 12th row? how many rows are there in all?

    asked by Katie on October 31, 2011
  72. math

    determine the value of k such that g(x)=3x+k intersects the quadratic function f(x)=2x^2-5x+3 at exactly one point determine the value(s) of k such that the linear function g(x)=4x+k does not intersect the parabola f(x)=-3x^2-x+4

    asked by Melissa on October 24, 2011
  73. Chemistry

    a chemical engineer placed 1.520 g of a hydorcarbon in the bomb of a calorimeter. The bomb was immersed in 2.550 L of water and the sample was burned. The water temperature rose from 20.00C to 23.55C. If the calorimeter (excluding the water) had a heat

    asked by Tori on October 31, 2011
  74. Physics

    a 2.5kg block initially at rest on horizontal surface. A horizontal force F of magnitude 6N and a vertical force P are the applied to the block. The coefficients of friction for the block and surface are Ms=0.4 and Mk=0.25.Determine the magnitude of the

    asked by Fatima on October 8, 2011
  75. Chemistry

    Imagine that you mix 50 g of a solute with 100 g of water at 40 degree C. Classify each solute by whether it would completely or partially dissolve under these conditions. -KCl -KClO3 -K2Cr2O3 -KNO3 -NaNO3 -Pb(NO3)2 I need help understanding the

    asked by Steph on October 11, 2011
  76. AP Chemistry

    Which of the following electron configurations correspond to an excited state? Identify the atoms and write the ground-state electron configuration where appropriate. If the configuration is a noble gas, enter the noble gas in brackets, for example [Ne]

    asked by Ferdinand on October 30, 2011

    The only force acting on a 2.3 kg body as it moves along the positive x axis has an x component Fx = - 6x N, where x is in meters. The velocity of the body at x = 3.0 m is 8.0 m/s. At what positive value of x will the body have a velocity of 5.0 m/s? I'm

    asked by Anonymous on October 21, 2011
  78. Probability

    9) A gumball machine has just been filled with 50 black, 150 white, 100 red and 100 yellow gum balls that have been thoroughly mixed. Sue and Jim, each purchased one gumball. What is the likelihood both Sue and Jim get red gumballs

    asked by Anonymous on October 25, 2011
  79. Physics

    Let vector B = 8.8 m, 75 degrees counterclockwise from the vertical. a) Find the x- and y-components of vector B in the normal coordinate system (where x is a horizontal line and y is a vertical line...both intersect each other). b) Find the x- and

    asked by Beth on October 8, 2011

    The figure shows a ball with mass m = 0.405 kg attached to the end of a thin rod with length L = 0.516 m and negligible mass. The other end of the rod is pivoted so that the ball can move in a vertical circle. The rod is held horizontally as shown and then

    asked by Anonymous on October 23, 2011
  81. physics

    A 28.0 block is connected to an empty 2.20 bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.44 and the coefficient of kinetic friction between the table and the block is 0.35. Sand

    asked by xxx on October 31, 2011
  82. Calculus

    A ship sailing parallel to shore sights a lighthouse at an angle of 12 degrees from its direction of travel. After traveling 5 miles farther, the angle is 22 degrees. At that time, how far is the ship from the lighthouse?

    asked by Tim on October 23, 2011
  83. Living environment

    Defective receptor proteins on a cell membrane have the least effect on 1.homeostasis 2.Muscle activity 3. nerve signals 4. Diffusion

    asked by FITTY on October 27, 2011
  84. Trigonometry

    Prove identity. Sec(pi-x)=-sec x

    asked by ALISON on October 23, 2011
  85. Chemistry

    An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be: KOH,NH3,HNO3,

    asked by Anon on October 31, 2011
  86. Calculus

    If a rock is thrown upward on the planet Mars with a velocity of 14 m/s, its height in meters t seconds later is given by y = 14t − 1.86t^2. Estimate the instantaneous velocity when t = 1.

    asked by Katy on October 8, 2011
  87. Trig

    Find the exact value of tan 5pi/12 using the half-angle identity.

    asked by Cynthia on October 15, 2011
  88. Math

    what is the perimeter of a right triangle with legs 6 cm and 3cm , leave the answer in simplest radical form

    asked by Kestrel on October 23, 2011
  89. chem

    How many moles of chloroethylene contain 5.47X10^26 molecules

    asked by mimi on October 1, 2011
  90. Business English

    Selecting concrete words 22. we have found that young men are best for this work. 23. She makes good grades 24. John lost a fortune in Las Vegas. 25. if we don't receive the goods soon we will cancel. 26.some years ago she made good money 27. His grades on

    asked by efi on October 18, 2011
  91. chemistry

    Consider the reaction, C2H4(g) + H2(g) ® C2H6(g), where DH = – 137 kJ. How many kilojoules are released when 55.3 g of C2H4 reacts?

    asked by Cooper on October 21, 2011
  92. Calculus

    A ball is thrown straight down from the top of a 220-foot building with an initial velocity of -22 feet per second. What is its velocity after 3 seconds? What is its velocity after falling 108 feet?

    asked by Susana on October 3, 2011
  93. Calculus

    The number N of US cellular phone subscribers (in millions) is shown in the table. (Midyear estimates are given.) t 1996 1998 2000 2002 2004 2006 N 44 69 109 141 182 233 (a) Find the average rate of cell phone growth between the following years. In each

    asked by Christina on October 29, 2011
  94. physics

    An artificial satellite circling the Earth completes each orbit in 139 minutes. (The radius of the Earth is 6.38 106 m. The mass of the Earth is 5.98 1024 kg.) (a) Find the altitude of the satellite.

    asked by Anonymous on October 31, 2011
  95. Chemistry

    How many mole of H2 will be produced if 0.500 grams of magnesium is reacted with 10.00mL of 2.0 M HCl? I've concluded the answer is 0.02 moles of H2, but I'm doubting myself a lot because I don't understand the aspects of the balanced chemical equation and

    asked by Martin on October 22, 2011
  96. Physics

    The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground some

    asked by Mary on October 7, 2011
  97. Math

    Two faucets can fill a tank in 1 hour and 20 minutes. The first faucet takes more than two hours longer to fill the same tank when functioning without the second tap. How long does it take to fill each one separately? Explain your solution

    asked by Louis on October 22, 2011
  98. physics

    A thin 2kg box rests on a 6kg board 50cm long with 20cm hanging off the edge of a table. How far can the center of the box be from the end of the table before the board begins to tilt?

    asked by Dan on October 12, 2011
  99. physics31

    1.A man in a hot-air balloon drops an apple at a height of 150m. If the balloon is rising at 15 m/s, find the highest point reached by the apple.

    asked by cedric on October 1, 2011
  100. Math

    Determine the equation of the quadraticcc function f(x)=ax^2-6x-7 if f(2)=3

    asked by Kestrel on October 21, 2011