Questions Asked on
October 20, 2011

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. Chemistry

    What are the concentrations of OH– and H in a 0.00070 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.

    asked by Mark
  7. Chemistry

    Calculate [H3O ], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 °C. [H+]= [ClO4-]= [OH-]=

    asked by Sevy
  8. Chemistry

    Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2N2O4 a) Calculate Change in reaction G* and K for this equilibrium. b) Calculate the (e) (the measure of the progress of the reaction) for this equilibrium if 1.00 mol NO2

    asked by Jenna
  9. Finance

    5. John and Daphne are saving for their daughter Ellen's college education. Ellen just turned 10 (t=0), and she will be entering college 8 years from now (at t=8). College tution and expenses at State U. are currently $14,500 a year, but they are expected

    asked by Alice
  10. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ? I tried it out and thought it would be ka= HSO3-(aq) + H2O(l)= H+(aq) + SO3-(aq) kb= HSO3-(aq) + H2O(l)= H3O+(aq)+ OH-(aq) Would that be right? or is it wrong? please can you take a look at it . Thanks.

    asked by Nia
  11. physics

    A missile's trajectory takes it to a maximum altitude of 1300Km. If its launch speed is 5.9 Km/s, how fast is it moving at the peak of its trajectory? answer is in Km

    asked by Drew
  12. physics

    A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 55.2° angle from its original direction and the unknown atom travels away at a 51.8° angle. What is the mass of the

    asked by kago
  13. physics

    At 25°C, sound can travel 100 meters across a football field in 0.29 seconds. Determine the velocity of these sound waves in the direction they travel across the field.

    asked by Anonymous
  14. Chemistry

    Given that Kw for water is 2.4× 10–14 at 37 °C, compute the pH of a neutral aqueous solution at 37 °C, which is the normal human body temperature.

    asked by John
  15. organic chemistry --please help me!!!!!!!!!!!!!!!

    Calculate the theoretical yield for the bromination of bothstilbenes and cinnamic acid, assuming the presence of excesspyridinium tribromide. cinnamic acid - 150 mg cis-stilbene - 100 μL trans- stilbene - 100 mg pyridinium tribromide - 200-385 mg

    asked by vivian
  16. chemistry

    You were given 25.00 ml of an acetic acid solution of unknown concentration. You find that it requires 29.60 ml of a 0.1050 M NaOH solution to exaclty neutralize this sample. A) What is the molarity of the acetic acid solution? B) what is the percentage of

    asked by Rema
  17. Physics

    In a popular amusement park ride, a rotating cylinder of radius 3.0 m is set in rotation at an angular speed of 0.80 revolutions per second. The floor then drops away, leaving the riders suspended against the wall in a vertical position. (a) What minimum

    asked by harrison
  18. geometry

    DEFG is an isosceles trapezoid. Find the measure of

    asked by Marcus
  19. Science

    A 12 g rifle bullet traveling 220 m/s buries itself in a 3.3 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's maximum displacement.

    asked by kago
  20. physics

    In order to convert a tough split in bowling, it is necessary to strike the pin a glancing blow as shown in the figure. Assume that the bowling ball, initially traveling at 15.0 m/s, has four times the mass of a pin and that the pin goes off at 75° from

    asked by kago
  21. Alg 1 quadratic functions

    A baseball player hits a baseball into the outfield. The equation h= -0.005x^2 +x+3 give the path of the ball, where (h) is the height and (x) is the horizontal distance the ball travels. A. What is the equation of the axis of symmetry? It's -100 right? B.

    asked by Cole
  22. Physic

    A dolphin experiences a force of 320 N [up] when it jumps out of the water. The acceleration of the dolphin is 2.6 m/s 2 [up]. (a) Calculate the mass of the dolphin. (b) What would be the acceleration of the dolphin if it had the same strength but half the

    asked by Michelle
  23. physics

    Determine what the theoretical slope of the graph is (for example the slope of a distance vs. time graph is velocity); be sure to show all work. So, I had to make a weight vs. mass graph which i did, and i also found its numeric value for the slope. I

    asked by Anonymous
  24. Finance

    Steve and Ed are cousins who were both born on the same day, and both both turned 25 today. Their grandfather began putting $2,500 per year into a trust fund for Steve on his 20th birthday, and he just made a 6th payment into the fund. The grandfather (or

    asked by Alice
  25. Chemistry

    Calculate [H3O ], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 °C. [H+]= [ClO4-]= [OH-]=

    asked by Sevy
  26. physics

    A generating station is producing 1.2 x 106 W of power that is to be sent to a small town located 4.2 km away. Each of the two wires that comprise the transmission line has a resistance per length of 5.0 x 10-2/km. (a) Find the power lost in heating the

    asked by shaknocka lewis
  27. Science

    A child in a boat throws a 5.30 kg package out horizontally with a speed of 10 m/s, see the figure. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 55.0 kg

    asked by kago
  28. math (brainteaser)

    The pahges in jacks book are numbered from the number 1, there are 555 didgits ow many pages in Jacks book

    asked by Anonymous
  29. statistics

    A survey of college students was conducted during final exam week to assess the number of cups of coffee consumed each day. The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal. a. What proportion of students

    asked by Scott
  30. Physics

    A car starts from rest and accelerates unifomly at 3m/s^2. A second car starts from rest 6 seconds later at the same point and accelerates uniformly at 5m/s^2. How long does it take the second car to over take the first car?

    asked by Joe
  31. physics

    The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reached home plate, 18.3 m (60 ft) away. The acceleration of gravity is 9.81

    asked by matt
  32. math

    The number uses every number 0-9 the numbers are used only once the fourth digit is 4 the first digit in the billions place is 3 the 5 is next to the last digit the sixth digit is 7 the digit after 3 is 9 the digit before 5 is 2the third digit is half the

    asked by Anonymous
  33. Physics

    A dragster and a driver together have mass of 942.2 kg. the dragster starting from rest attains a speed of 25.5m/s in 0.56 s. 1. find the average acceleration of the dragster during this time interval? I really need the formula 2. What horizontal force

    asked by Ama
  34. physics

    At a track-and-field meet, the best long jump is measured as 8.00 m. The jumper took off at an angle of 46° to the horizontal. (a) What was the jumper’s initial speed? (Neglect air resistance.) 1 m/s (b) If there were another meet on the Moon and the

    asked by joe
  35. nutrition

    Review the nutrition quality of the items, using what you know about daily values, and ingredients (one of the products must have a health claim). Write a 300-500 word essay on what you have learned.

    asked by Marissa
  36. Physics 5

    Two blocks are free to slide along the frictionless wooden track ABC shown in Figure P9.20. A block of mass m1 = 5.00 kg is released from A. Protruding from its front end is the north pole of a strong magnet, repelling the north pole of an identical magnet

    asked by Anonymous
  37. 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
  38. college chemistry

    Calculate the equilibrium concentration of H3O+ in the solution if the initial concentration of C6H5COOH is 6.0×10^-2. Kc=6.3 *10^-5

    asked by erika
  39. ALGEBRA

    why dose duffer want lights around the golf course? there are 40 empty spaces

    asked by Brendan Riddell
  40. chemistry

    A gas cylinder of volume 5.00 L contains 1.00 g of Ar and 0.500 g of Ne. The temperature is 275 K. Find the partial pressure of Ne.

    asked by mary
  41. Geometry

    what is the value of x in the isosceles trapezoid below? the top is 10x degrees and the bottom is (3x+11) degrees

    asked by Lorraine
  42. chemistry

    Calculate [H3O ], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 °C.

    asked by Sevy
  43. Physics*

    A student sits on a rotating stool holding two 3.2-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is

    asked by Allie
  44. chemistry

    How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?

    asked by HElp
  45. Mathematics!

    A cereal factory has weekly fixed costs of $48,000. It costs $1.37 to produce each box of cereal. A box of cereal sells for $3.99. Express the profit function p(x) that gives the total weekly profit from x boxes of cereal.

    asked by Matt
  46. chem (flowchart) help

    draw an isolation flowchart to show how one would separate mixture of 1-decanol , aniline and benzoic acid

    asked by low
  47. calculus

    What angle does the tangent to the curve y(x)=sin^2(x/3)+15sin(x/3) at x=3pi make with the x-axis?

    asked by Anonymous
  48. American Literature

    How do you think Ralph Waldo Emerson, author of "Concord Hymn" , to Thomas Paine's arguments and his writing style? Well from what I could understand from Emerson's work, he would like Paine's arguments and writing style, i think. I don't know if this is

    asked by Anonymous
  49. Physics*

    A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 70.0-gram mass is attached at the 16.0-cm mark, the fulcrum must be moved to the 39.2-cm mark for balance. What is the mass of the meter stick? Answer in grams

    asked by Allie
  50. Finance

    Thompson Enterprises has $5,000,000 of bonds outstanding. Each bond has a maturity value of $1,000, an annual coupon of 12.0%, and 15 years left to maturity. The bonds can be called at any time with a premium of $50 per bond. If the bonds are called, the

    asked by k
  51. Calculus AB

    Give a formula for the extended function that is continuous at the indicated point. F(x)= (x-4)/((√x)-2) at x=4 I know the answer I just need to figure out how to work it out. The answer btw is y= (√x) + 2

    asked by Sarah
  52. Physics

    Two long parallel wires separated by a distance, d, carry currents in opposite directions. If the left-hand wire carries a current i/2, and the right-hand wires carries a current i, determine where the magnetic field is zero.

    asked by Jessica
  53. Math

    If you had a fraction strip folded into twelfths, what fractional lengths could you measure with the strip? b. How is your answer in part (a) related to the factors of 12?

    asked by Tina
  54. chemistry

    write the molecular, ionic and net ionic equation for the following Ph(NO3)2 + NaOH Pb(NO3)2 + Na2CO3 Ni(NO3)2 + NaOH Ni(NO3)2 + Na2Co3

    asked by TROUBLED
  55. physics

    Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 74 kg student to accelerate downward at 9.8 m/s2, determine the upward acceleration of the Earth during the student’s fall. Answer in units of m/s2

    asked by amanda
  56. chemistry

    In the following experiment, a coffee-cup calorimeter containing 100 mL of H20 is used. The initial temperature of the calorimeter is 23.0 C . If 3.60 g of CaCl2is added to the calorimeter, what will be the final temperature of the solution in the

    asked by Colin
  57. logic and design

    . Design a modular program that asks how many tickets for each class of seats were sold, and then displays the amount of income generated from ticket sales. There are three seating categories at a stadium. For a softball game, Class A seats cost $15, Class

    asked by Dewayne
  58. physics

    A large box is loaded into the very back of a pickup truck and is not tied down. The truck then goes down the road at 20.0 m/s. The coefficient of static friction is 0.80 and the coefficient of kinetic friction is 0.45 between the box and the bed of the

    asked by ....
  59. OChem

    A mixture of fluorene and benzoic acid is dissolved in diethyl ether and mixed thoroughly with an aqueous solution of NaOH. After the layers separate, what will each of the layers contain? Label the layers. Indicate the main components, not species that

    asked by David
  60. physics

    A certain spring stretches 4.6 cm when it supports a mass of 0.55 kg . If the elastic limit is not reached, how far will it stretch when it supports amass of 8 kg ? Answer in units of cm

    asked by amanda
  61. Healthcare professionals

    Hospitals frequently seek ways to ensure survival. Sometimes an adversarial climate cannot be avoided if the action that is being considered is controversial. For example, a hospital may seek to expand its market reach by opening an inpatient drug

    asked by Julie
  62. Physics help!!

    Assume: A 78 g basketball is launched at an angle of 56.8◦ and a distance of 10.4 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as

    asked by Louis
  63. English-Quote

    We come to them who weep foolishly, and sit down and cry for company, instead of imparting to them truth and health in rough electric shocks, putting them once more in communication with the soul.” Based on this quote, what can you ascertain about

    asked by hue
  64. Physics 1

    A 50.0-kg block and 100-kg block are connected by a string as in Figure P8.36. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between the 50-kg block and incline is 0.250. Determine the change in the kinetic energy

    asked by Anonymous
  65. physics

    as a baseball player strikes the ball with his batt the 1kg bat applies an average force of 250N on the .15kg baseball for .2 seconds. A) what is the force applied by the baseball on the bat? what is the acceleration of the baseball? C) what is the speed

    asked by Ali
  66. Chemistry

    You observe that when copper is added to a soltion containing gold ions, the copper dissolves and the gold precipitates. Similarly, almost every other metal will displace gold from solutions of gold salts. a) Do these observations mean that gold ion is a

    asked by Dani
  67. statistics

    a batch of 25 used automobile alternators contains 3 defectives. if 3 alternators are sampled at random, find the probability of the event . (a). A=[none of the defectives appear ] (b). B=[exactly two defectives appear]

    asked by marlynn
  68. grammar

    Underline the singular noun in each sentence, then write the plural form of the word you underlined. The sentence is the following. They are planning several projects for the year ahead.

    asked by Jess
  69. Biology

    You are supposed to add 0.1 mol of a substance with molecular weight = 354.9 to 1 liter of water. How much should you add? Choose one.

    asked by Leanna
  70. Physics*

    A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 575 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 5,000 rev/min. (a) Find

    asked by Allie
  71. math

    An artifact was found and tested for its carbon-14 content. If 81% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. yr

    asked by Anonymous
  72. Finance

    Suppose a new company decides to raise a total of $200 million, with $100 million as common equity and $100 million as long-term debt. The debt can be mortgage bonds or debentures, but by an iron-clad provision in its charter, the company can never raise

    asked by Alice
  73. spanish

    que les gusta hacer a los padres de ruben

    asked by lemar
  74. math

    The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your

    asked by Anonymous
  75. Finance

    Which of the following statments is CORRECT? a. Assume that two bonds have equal maturities and are of equal risk, but one bond sells at par while the other sells at a premium above par. The premium bond must have a lower current yeild and a higher capital

    asked by Alice
  76. Physics

    A 0.90 × 10^3 kg sports car collides into the rear end of a 2.4 × 10^3 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 4.6 m before stopping. The police officer, estimating the coefficient of kinetic

    asked by kago
  77. Physics

    A 245 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 35.0 cm, as shown in Figure 5-21. (a) Calculate the gravitational potential energy at A relative to B. 1 . (b) Calculate the particle's kinetic energy at B. 2

    asked by Brooks
  78. Physics 2

    A particle moves along a line where the potential energy of its system depends on its position r as graphed in Figure P8.46. In the limit as r increases without bound, U(r) approaches +1 J. (a) Identify each equilibrium position for this particle. Indicate

    asked by Anonymous
  79. Math

    a) f(x) = 4.1x +92.16 b) f(x) = 17.9x + 19.36 c) f(x) = 8.8x + 55.4 ANSWERS: a) 4.8 b) 0.93 c) 2.2, i just have no clue how they got these answers EXTRA INFO: The demand function for a new product is p(x)= - 4x +42.5, where x is the quantity sold in

    asked by Nancy
  80. Alg1

    A baseball player hits a baseball into the outfield. The equation h= -0.005x^2 +x+3 give the path of the ball, where (h) is the height and (x) is the horizontal distance the ball travels. A. What is the equation of the axis of symmetry? It's -100 right? B.

    asked by Adam
  81. Math

    A baseball player hits a baseball into the outfield. The equation h= -0.005x^2 +x+3 give the path of the ball, where (h) is the height and (x) is the horizontal distance the ball travels. An outfielder catches 3 ft above the ground. How far has the ball

    asked by Vanessa
  82. Math (UBC)

    Economists use production functions to describe how output of a system varies with another variable such as labour or capital. For example, the production function P(L) = 200L + 10L^2 - L^3 goves the output of a system as a function of the number of

    asked by Assignment6
  83. Conley

    Chicken Delight claims that 88 percent of its orders are delivered within 10 minutes of the time the order is placed. A sample of 60 orders revealed that 50 were delivered within the promised time. At the .05 significance level, can we conclude that less

    asked by Della
  84. ALGERBRA 2

    rosalyn works no more than 25 hours a week during the school year. she is paid $12 an hour for tutoring geometry and $8 an hour for delivering pizzas for Pizza King. she wants to spend at least 2 hours but no more than 7 hours a week tutoring. find

    asked by faith
  85. Physics

    A 0.490 kg hockey puck, moving east with a speed of 5.80 m/s, has a head-on collision with a 0.870 kg puck initially at rest. Assume a perfectly elastic collision. (Let east be the +x direction.) (a) What will be the speed of each object after the

    asked by kago
  86. Chemistry

    A mixture containing 235 mg of Helium and 325 mg of neon has a total pressure of 453 torr. What is the partial pressure of Helium

    asked by Monique
  87. Finance - Net Advantage to Leasing

    Net advantage to leasing) Arkansas Instruments (AI) can purchase a sonic cleaner for $1,000,000. The machine has a five-year life and would be depreciated straight line to a $100,000 salvage value. Hibernia Leasing will lease the same machine to AI for

    asked by Dantes
  88. chemistry

    A 48 g sample of water at 98.°C is poured into a 55 g sample of water at 15°C. What will be the final temperature of the mixture?

    asked by Anna
  89. Psychology

    If a negative correlation between two sets of scores is displayed as a scatterplot, the points are clustered in a pattern that Question 5 options: resembles a bell-shaped curve. extends from the lower left to the upper right of the plot. resembles a

    asked by lisa
  90. Finance

    Which of the following statements is CORRECT? a. Two bonds have the same maturity and the same coupon rate. However, one is callable and the other is not. The difference in prices between the bonds will be greater if the current market interest rate is

    asked by Alice
  91. physics numerical

    a long horizontal wire is rigidly placed, carrying a current of 50a. another parallel long wire carrying a current of 40a is just supported above it.determine the distance between them at which the upper wire can be just supported by magnetic repulsion

    asked by brock
  92. Physics 4

    A 10.0-kg block is released from point A in Figure P8.57. The track is frictionless except for the portion between points B and C , which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2 250 N/m, and compresses

    asked by Anonymous
  93. physics

    During a baseball game, a batter hits a pop- up to a fielder 78 m away. The acceleration of gravity is 9.8 m/s2 . If the ball remains in the air for 5.8 s, how high does it rise?

    asked by matt
  94. Math (Please Help)

    A man went to a post office to buy stamps. He bought x, 50 cent stamps and y, 25 cent stamps for $3.50. If he bought twice as many 50 cent stamps and half as many 25 cent stamps, the cost would be $4.75. Evaluate x and y

    asked by Charmin
  95. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ?

    asked by Nia
  96. english

    A good strong thesis statement about the children's book Corduroy by Don Freeman

    asked by Nicole
  97. Ap chem

    When .4000 g of CH4 is burned in excess oxygen in a bomb calorimeter that has a heat capacity of 324, the temperature increases 6.795 degrees celsius. How much energy is released? (in kJ/mol CH4)

    asked by Hannah
  98. Finance

    Cosmic Communication Inc. is planning two new issues of 25-year bonds. Bond par will be sold at its $1,000 par value, and it will have a 10% semiannual coupon. Bond OID will be an Original issue Discount bond, and it will also have a 25-year maturity and a

    asked by Alice
  99. algebra

    A baseball player hits a baseball into the outfield. The following equation models the ball's path. If not caught, when will the baseball land? Round to the nearest tenth second. h = -16t^2 + 50t + 4

    asked by tracy
  100. social studies

    name two helpful developments in georgia and the rest of the country that occurred after the Revolutionary War

    asked by allie
  101. Functions

    Janice is running a 7613 meter race. Assume the she runs at a constant speed of 287 meters per minute. Express the function f(t) that gives her distance from the finishing line t minutes after the start of the race.

    asked by Cortney
  102. Finance

    Tuttle Buildings Inc. has decided to go public by selling $5,000,000 of new common stock. Its investment bankers agreed to take a smaller fee now (6% of gross proceeds versus their normal 10%) in exchange for a 1-year option to purchase an additional

    asked by k
  103. math

    Suppose the intrest rate is 8%APR on a monthly compounding. What is the present value which pays $95 every 6 months for 6 years.

    asked by Anonymous
  104. math

    the center of three congruent small circles are collinear, and their diameters form the diameter of the large circle, shown, whose area is 81 pi units. what is the circumference of one of the smaller circles? express your answer in simplest radical form.

    asked by arch
  105. algebra real world problm solving

    You want to buy a cd plaer that cost $99. you already have $15.00. If you save $12 per week, when will you have enough money to buy the cd player? i need to write an expression and solve it. i wrote: x/12 - $15 = $99 im not sure how to do this?

    asked by marko
  106. math

    a chemistry experiment calls for 30% sulfuric acid solution. if the supply room has only 50% and 20% sulfuric acid solution on hand,how much of each should be mixed to obtain 12 litres of 30% solution?

    asked by patel
  107. Spanish

    I had to rewrite from English to Spanish-Please check if I did them correctly- 1.She sees them. Ella los ve. 2. We see them. Nosotros los vemos. 3. I invito you. Yo te invito. 4. I invite him. Yo lo invito. 5.She see you all. Ella los ve. 6. He invites us.

    asked by Bethany
  108. Nutrion

    What types of pathogens? What habits in your food preparation practices do you think might cause these pathogens to grow? What habits can you change in your life to reduce your risk of foodbourne illness?

    asked by Marissa
  109. physics

    A long jumper leaves the ground at an angle of 22.1◦ to the horizontal and at a speed of 10 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s2 . Answer in units of m

    asked by matt
  110. physics

    A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s

    asked by matt
  111. Chemistry

    so i had to calculate the pH of a 100ml solution of .10M acetic acid (ka=1.8x10(-5) I came out to 2.87. But then, they want the pH if 50ml HCL is added. So i thought...Ka = x2/.15M, therefore the square root of .15M x 1.8x10(-5) = .00164(concentration). So

    asked by Kevin
  112. logic and programing langage

    Design a modular program that asks the user to enter the replacement cost of a building and then displays the minimum amount of insurance he or she should buy for the property.

    asked by Dewayne
  113. physics numerical

    a satellite orbitting the earth at the equator at a na ltitude of 400 km, has an antenna that can be modelled as a 2.0m long rod. the antenna is oriented perpndicular to the earth's surface. at the equator, the earth's magnetic field is essentially

    asked by brock
  114. Algebra

    Find the percent of error of each measurement. 0.2cm 0.4cm

    asked by Tim
  115. Algebra

    The equation x^2+px+q=0, q cannot be equal to 0, has two unequal roots such that the squares of the roots are the same as the two roots. Calculate the product pq. I think the obvious root would be one but the second roots i just can't figure out!

    asked by Ricky
  116. Physics

    A 2.5 kg block is launched up a ramp at 9.0 m/s. If the ramp is 35 degrees above the horizontal and the coefficient of static friction is 0.60, while the coefficient of kinetic friction is 0.25. a. How far does the block go up the ramp from its starting

    asked by Me
  117. chemistry

    A 10.0 grams piece of gold 90.0 Celsius was stirred into 15.0ml of water at an initial temperature of 25.0 degrees Celsius. The final temperature of the water was 26.34 degrees celsius. Calculate the specific heat of gold. The specific heat of water is

    asked by casey
  118. Spanish

    I need to match the subject pronouns with the verb llevar these are the verbs: llevas, llevamos, llevo, llevan, lleva these are the subj. pronouns: yo, el, nosotros, ellas, tu, ella, ellos, ustedes. PLEASE HELP

    asked by Jahnay
  119. chemistry

    Hydrogen, H2(g), is above silver metal in the activity series of the metals. WIll the follwing reaction, Ag(s) + H+(aq) -> occur or not occur? why or why not?

    asked by Colby
  120. Mathematics

    After diving 92m below the sea level, the diver rises at a rate of 5 meters per minute for 7minutes. Where is the diver in relation to the surface?

    asked by Angel
  121. Chemistry Help!!

    why is it impossible to draw a distinction between natural substances and chemical substances?

    asked by Maci
  122. chemistry

    a 2.00-liter sample of a gas has a mass of 1.80 grams at STP. What is the density , in grams per liter , of this gas at Stp?

    asked by unkown
  123. Math

    A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished?

    asked by Jack
  124. Math

    A manufacture of television sets has a historical defective rate of ten percent. a. what is the probability that in an hourly production run of 10 televisions, one will be defective b. What is the probability that in an hourly daily production run of 10

    asked by Jim
  125. chemistry help!

    Potassium has an atomic mass of 39.10amu. a sample of potassium is made up of isotopes potassium-39 (mass=38.964) and potassium-41(mass =40.962 amu). What percentage of the potassium sample is potassium-39? what percent of the sample is potassium-41?

    asked by Skylar
  126. Finance

    Which of the following statements is CORRECT? a. Two bonds have the same maturity and the same coupon rate. However, one is callable and the other is not. The difference in prices between the bonds will be greater if the current market interest rate is

    asked by Alice
  127. Physics

    A 21.0-g metal cylinder is placed on a turntable, with its center 90 cm from the turntable's center. The coefficient of static friction between the cylinder and the turntable's surface is ìs = 0.84. A thin, massless string of length 90 cm connects the

    asked by mymi
  128. zoology

    what is the dental formula of rabbit?

    asked by brock
  129. High School

    Will high school will look at my middle school grades (or just 8th grade grades ?) ????

    asked by Laruen
  130. Calculus

    Show that the sum of the series ∑n(p^n) from n=1 to infinity (where 0

    asked by Ryan
  131. Statistics

    USA snapshot presented a bar graph depicting business travelers’ impression of wait times in airport security lines over the past 12 months. Statistics were derived from Travel Industry Association of American Business Traveler Survey of 2034

    asked by Jennifer
  132. Math

    write a function. f(x), that represents the cost of renting a car for x days with a total of 80 kilometers if there is a fixed charge of $17 per day and a charge of $0.35 per kilometer.

    asked by Cortney
  133. Calculus

    Find the Critical Numbers? 1.) f(x) = 2x^3 + 3x^2 + 36x x=? 2.) g(t) = |5t − 4| t=?

    asked by John
  134. English/writing

    If I am writing the following as a poem, how would I punctuate it- We are room 204 Check out our door It is clear to see We choose to be drug free

    asked by Mattie
  135. chemistry

    how many milliliters of concentrated NaOH(19.3 M) are needed to make 8.00 L of 0.25 M base solution?

    asked by HElp
  136. urgent maths help needed now

    jafar has an isosceles triangle with an area of 20.25cm squared, what is the length of the side facing the right angle?

    asked by joi
  137. physic

    A 16 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.24, and the impact drives the block a distance of

    asked by kago
  138. physics

    A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s

    asked by matt
  139. physics

    A car having an initial speed of 16 m/s is uniformly brought to rest in 4.0 s. How far does the car travel during this 4.0 s interval?

    asked by john
  140. aLgEbrA variable & expression

    i need to define a variable and write an algebraic expression for each phraase. 1) two points few than 3 times the number of points scored yesterday. i wrote: 3p-2 = 2) one metere more than 6 times your height in meters i wrote: 1 + 6h 3) seven pages fewer

    asked by marko
  141. algebra 2 word problem

    1) a fitness club advertises a special for new members. each month of membership cost $19, with an initial enrollment fee of $75.00. write an expression for the total cost. Then evaluate your expression for 8 months of membership i wrote: $75.00 + 19m = ?

    asked by marko
  142. calculus

    area of a semicircle is increasing at a constant rate. At 5 secs the area is 4pi. At 7 secs the area is 5pi. In terms of r at what rate is the radius changing?

    asked by David
  143. earth

    a satellite orbits the earth in circular orbit 620 km above the suface. if the radius of the earth is 6380 km, calculate, to 3 significanf figures, the distance travelled in a single orbit?

    asked by mike
  144. Finance

    Rainier Bros. has 12.0% semiannual coupon bonds outstanding that mature in 10 years. Each bond is now eligible to be called at a call price of $1,060. If the bonds are called, the company must replace them with new 10-year bonds. The flotation cost of

    asked by k
  145. English

    I need your help with the following sentences. Are they grammatically correct? Thank you. 1) How long have you been married for? Since 1998. 2) Is it wrong: "How long is it since you got married? (The answer is not since 1998 but for three years). 3) How

    asked by Henry2
  146. physics

    A simple harmonic oscillator has spring constant = 8.8N/m , amplitude = 11cm , and maximum speed 4.6 m/s. what is the speed at x=6cm?

    asked by Alan
  147. english

    How do i make an outline? From Lord of the Flies, i need to make an outline of one page. this one: The boy with fair hair lowered himself down the last few feet of rock and began to pick his way toward the lagoon. Though he had taken off his school sweater

    asked by derp
  148. Chemistry

    If 4.0 g of hydrogen and 10.0 g of oxygen are mixed according to the equation 2 H2 + O2 = 2 H2O, which is the limiting reagent?

    asked by HElp
  149. Chemistry

    When a solution is made from 1.0 g of KI and 90 mL of water, what is its molarity?

    asked by HElp
  150. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ? I tried it out and thought it would be ka= HSO3-(aq) + H2O(l)= H+(aq) + SO3-(aq) kb= HSO3-(aq) + H2O(l)= H3O+(aq)+ OH-(aq) Would that be right? or is it wrong? please can you take a look at it . Thanks.

    asked by Nia
  151. maths

    If (2x-3) is a factor of 2x raised to the power four-3xsquare+15x-15k,find the value of (3k- root of 5 k).

    asked by maths rockzzz
  152. maths

    one side of a right triangle is 12.5 ft the perimeter is 38.7 ft. what is the length of the hypotenuse and the other unknown side?

    asked by patel
  153. math

    a college lab paced two orders with a chemical supplier. the first order was for 13 bottles of calcium hydroxide solution and 4 bottles of sulfuric acid and totalled $ 487. the second order was for 6 bottles of calcium hydroxide solution and 2 bottles of

    asked by patel
  154. Calculus

    Find a series ∑a_n for which ∑(a_n)^2 converges but ∑|a_n| diverges

    asked by Sarah
  155. chemistry

    When hydrazine (N2H4) is burned in a 259-g brick container, the temperature of the brick increases by 5.13 C. Calculate the quantity of heat released in this reaction. The specific heat of the brick is .840 J/(g C)

    asked by n
  156. math

    a college lab paced two orders with a chemical supplier. the first order was for 13 bottles of calcium hydroxide solution and 4 bottles of sulfuric acid and totalled $ 487. the second order was for 6 bottles of calcium hydroxide solution and 2 bottles of

    asked by patel
  157. algebra

    A charitable fund's balance is modeled by y = -4.1x^2 + 7.1x + 145, where y is the balance and x is the years after 1996. If no money is added to the fund, in how many years will the fund have a balance of 0? Round to the nearest year.

    asked by tracy
  158. math

    a chemistry experiment calls for 30% sulfuric acid solution. if the supply room has only 50% and 20% sulfuric acid solution on hand,how much of each should be mixed to obtain 12 litres of 30% solution?

    asked by patel
  159. physics

    Vector {\bf{\vec V}}_1 is 6.3 units long and points along the negative x axis. Vector {\bf{\vec V}}_2 is 8.5 units long and points at 30^\circ to the positive x axis.

    asked by Anonymous
  160. physics

    Vector {\bf{\vec V}}_1 is 6.3 units long and points along the negative x axis. Vector {\bf{\vec V}}_2 is 8.5 units long and points at 30^\circ to the positive x axis.

    asked by help me plzzzzz
  161. Physics

    In an amusement ride, fun seeking people enter a 7.4 meter diameter cylinder and stand up against the wall. The cylinder spins fast enough so that when the bottom drops down 2 meters, the people remain pinned to the wall. The cylinder continues to rotate

    asked by Me
  162. philosophy

    This is a case and i need to identify which to theories apply to it out these three Kant's deontology, Mill's utilitarianism, and Hursthouse's virtue ethics. In the summer of 1945, President Harry Truman ordered the atomic bombing of the Japanese cities of

    asked by mas
  163. Math

    There are 3 spider webs. The 1st web is twice as large as the second web. The 3rd web is 3 inches larger than the 1st web. The combined width of the 3 webs is 1 foot 6 in. How long is each web?

    asked by Dena
  164. Math

    Leo has 8 more markers than colored pencils. He has a total of 32 markers and colored pencils. How many of each kind does he have?

    asked by Dena
  165. Calculus

    If a_n >0 and b_n >0 and series ∑ sqrt( (a_n)^2 +(b_n)^2 ) converges, then ∑a_n and ∑b_n both converge. True or false? If true, why? If false, give a counterexample.

    asked by Rebecca
  166. physics

    A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s

    asked by matt
  167. social studies

    the two major tribes of the northeastern part of the Eastern Woodlands were the

    asked by maxwell
  168. statistics

    30 customers the first week and 55 customers the second week and 80 customers the third week, what would you project for week 4

    asked by Lorea
  169. Math

    Using known Facts to Find Unknown Facts. You can use breaking apart to find a product. Find 4 x 5. example: 4 x 5= 2x5+2x5 =10 + 10 =20

    asked by Latoya
  170. Physics

    Multiple choice please help. How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s? a. 100 J. b. 50 J. c. 10 J. d. 5 J. The airbag in a car works in a collision by . . . a. increasing the time of the impact to the person. b. reducing

    asked by Lisa
  171. Chinese

    Where would I look to find out how to pronounce the Chinese name Xuelin?

    asked by Teri
  172. Algebra 2

    1/16(x)^3a + 1/2(y)^(6a)(z)^(9b)

    asked by Peter
  173. Math

    CRANES Season 1: Wins 38 Season 2: Wins 42 Season 3: Wins 31 Season 4: Wins 50 Season 5: Wins 31 Season 6: Wins 48 PANTHERS Season 1: Wins 36 Season 2: Wins 42 Season 3: Wins 40 Season 4: Wins 40 Season 5: Wins 42 Season 6: Wins 40 Which team had the

    asked by Mary
  174. Physics

    At 7.65 cents per kilowatt-hour, what does it cost to operate a 8.00 hp motor for 7.00 hr?

    asked by Kyle
  175. Math

    for what value of k will the function f(x)=kx^2-4k+k have no zeros

    asked by Ariel
  176. Math

    the graph of the function f(x)=x^2-kx+k+8 touches the x-axis at one point. What are the possible values of k

    asked by Ariel
  177. Algebra

    I'm working midpoints, distance, circles and standard form and general form. I have some questions with my answers to the first two-I'm stuck on #3 1. What is the distance between points (0,0) and (-3,5) My answer: sqrt34 2.What is distance between (3,1)

    asked by Sally
  178. Math

    A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished? How do you get 32 tiles?Can you please explain?Thanks

    asked by Jack
  179. algebra

    how do you get square root of (72)+ square root of (18) + square root of (50)

    asked by Katy
  180. algebra

    Can someone show me how to use fractional exponents to solve 5^(1/4)*5^(2/3) and then convert to radicals and simplify to the lowest terms?

    asked by Katy
  181. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ? i know you got to ignore Na because is a strong base but i don't know how to get the actual ka and kb ! pleasee help me!!!!!!!!!!!!

    asked by Nia
  182. Math

    a) f(x) = 4.1x +92.16 b) f(x) = 17.9x + 19.36 c) f(x) = 8.8x + 55.4 ANSWERS: a) 4.8 b) 0.93 c) 2.2, i just have no clue how they got these answers EXTRA INFO: The demand function for a new product is p(x)= - 4x +42.5, where x is the quantity sold in

    asked by Nancy
  183. Math

    The marching band, cheerleaders, and chaperones are traveling by bus to play in the Citrus Bowl parade in Orlando. There are 216 bank members, 32 cheerleaders, and 40 chaperones making the trip. They can rent any number of one type of bus shown in the

    asked by HELP ME PLEASEEEE
  184. 5th Grade Science

    Creation of landforms??

    asked by Julie
  185. COMM 215

    Please guide me on what I have done incorrectly: Part I: True or False 1. The following word group is a FRAGMENT: That movie, one of my favorites. X True __False 2. The following word group is a FRAGMENT: The local baseball team, needing a good pitcher

    asked by Ashley
  186. Algebra Please help!!!!

    I need assisatnce with this. I do not want the answer I just want some guidence on how I should start it. The width of a rectangle is 5 ft, its length is (3x+2) ft, and its area is 75 ft². Find x

    asked by Liz
  187. Math

    The equation x^2+px+q=0, q cannot be equal to 0, has two unequal roots such that the squares of the roots are the same as the two roots. Calculate the product pq.

    asked by Ricky C.
  188. Science

    A container with equal sides of 8 cm is filled with 1200g of fluid. What is the force in Newtons on the bottom of the container?

    asked by Hannah
  189. Spanish

    I need to match the subject pronouns with the verb llevar these are the verbs: llevas, llevamos, llevo, llevan, lleva these are the subj. pronouns: yo, el, nosotros, ellas, tu, ella, ellos, ustedes. PLEASE HELP

    asked by Jahnay
  190. math

    if their are 72 students 2/3 of the students are 12 years old how many are 12 years old

    asked by John
  191. Math

    How do I convert a decimal to a fraction. .350 My answer: 350/100

    asked by Leslie
  192. programming

    Part A: Write a code segment that inputs an integer from cin, and then outputs a row of that many stars on cout. Part B: Change the code segment to read a series of numbers from file indata, and print a row of stars on cout for each number read.

    asked by Ayuda!!!
  193. Psychology

    example of work smarter, not harder. I need one sentence of how this phrase could apply to launching internet search.

    asked by Sharon
  194. history

    what safeguards are containded in the constitution to protect the states from violations of their rights

    asked by Anonymous
  195. SOCIAL STUDIES

    despite such limits athens is still admired as an early model of democracy

    asked by ZUICK
  196. math

    I am a 4 digit number greater than 9,000 my omes digit is 3 and my hundreds digit is the smallest prime number greater than 5 the sum of my digits is 20. What number am i?

    asked by Anonymous
  197. geometry

    draw two points r and s then sketch rs add a point t on ray so that s is beetween r and t

    asked by brenda
  198. SCIENCE

    Craig sees a glass with ice tea sitting on the table. He notices that there is a great deal of moisture on the outside of the glass and a puddle of water on the table. He asks his family what they think causes the water to form on the outside of the glass.

    asked by Jaime
  199. Math( help please ! )

    For what values of k will the function f(x)=3x^2+4x+k=0 have no zeros, one zero, 2 zeros

    asked by Poppy
  200. Math

    Prove that if "a" is a unit in a ring R with unity, then "a" is not a zero divisor in R.

    asked by Jackie
  201. grammar

    Does this sentence need a comma? Gum and drinks are not allowed, because they can create disasters in the dirt-free zone.

    asked by dakota
  202. algabra

    cubes 1 and 2 are similar if the volume of cube 2 is 45 and the scale factor between sides of the two is 2:3 what is the volume of cube 1?

    asked by nicholas
  203. science

    In the 1980s a popular environmental slogan was "Reduce, Reuse and Recycle" and now "Go Green," is a popular message. Consider the Reusable Grocery Bags sold in markets everywhere. What are the pros and cons that you see in this latest trend? Give examples

    asked by ronnew
  204. Algebra

    How do you factor out y=x^3-9x^2+9

    asked by Carey
  205. Physics

    110.817

    asked by swim chick
  206. physics

    George takes off for a long jump at an angle of 28 degrees, and lands 6.9 m away. How fast was he when he jumped?

    asked by Tyler
  207. statistics

    Assuming that the data are normally distributed with a mean of 45 and a standard deviation of 3.25, what is the z-score for a value of 40?

    asked by Dean
  208. math

    Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.36 multiplied by 10-6 watts/cm2 D = mark dB

    asked by Anonymous
  209. math

    The half-life of 234U, uranium-234, is 2.52 multiplied by 105 yr. If 98.7% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed? yr

    asked by Anonymous
  210. math

    linear equations

    asked by kayla
  211. physics

    A 0.82 kg physics book with dimensions of 32.4 cm by 20.1 cm is on a table. What force does the book apply to the table? Answer in units of N

    asked by amanda
  212. MCC

    Design a modular program that asks the user to enter the replacement cost of a building and then displays the minimum amount of insurance he or she should buy for the property.

    asked by Dewayne
  213. math

    there are seven pies if i take away 2 1.3 how many are left

    asked by ash
  214. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ? i know you got to ignore Na because is a strong base but i don't know how to get the actual ka and kb ! pleasee help me!!!!!!!!!!!!

    asked by Nia
  215. English

    Thank you. Can you please clarify this doubt to me? If the answer is "since 1998" can the question be: How long is it since you got married"? Is the sentence "How long ago did you marry"? wrong. The verb is "get married". When did you divorce your fist

    asked by Henry2
  216. English

    I forgot to add this sentence. 1)How long is it since it last snowed? ..... December. (Which is the correct preposition?)

    asked by Henry2
  217. Economics

    Your demand curve for baseball tickets is as follows: price per ticket Qd $1 4 $2 3 $10 2 $20 1 YOu buy 2 tickets at $10 each. THe value yo you of the two tickets is what? It say the answer is $30. I do not understand why you have to add 10 and 20. I

    asked by Jim
  218. physical chemistry

    if 10 litres of a solution of na2co3 contains 21.2g of na2co3, what is its strength?

    asked by brock
  219. Phys sci

    we are makeing rube goldberg machiens but are problem is hot to activate the pulley by putting the string in to the fire befor its time and makeing the machine do other things.

    asked by Abigail
  220. algebra

    26.8 over .01 it says to evaluate each expression

    asked by Colby
  221. algebra

    26.8 over .01, I don't know what to do with this it is set up so it looks like a fraction, could this mean divide 26.8 by .01?

    asked by Colby
  222. English

    Could you please check these sentences for me? Thank you very much for your invaluable help. 1) I find it difficult to translate the following description into English since I don't know how old the students are in their fifth or sixth class. How old are

    asked by Henry2
  223. math

    a rectangle has an area of 330m^2 , one side is 7 m longer than the other what are the dimensions of this rectangle

    asked by Hannah
  224. Math

    Mike bought 252 bricks to build a wall in his yard. Each row has 14 bricks. Each bricks is 3 inches tall. How many inches tall will be wall be if Mike uses every brick?

    asked by Mia
  225. Comm 215

    Is this correct 49. To succeed in the new economy, workers will have to learn throughout their careers, adapt to changing circumstances, and have self-motivation.

    asked by Ashley
  226. SOCIAL STUDIES

    In 1900 for health reasons the course of what river was changes in the U.S. making it world's only river to flow backwards?

    asked by Justin
  227. Chemistry

    Naoh+h2so4--------h20 +na2so4 Now the question is what number of moles of naoh require to neutralize 1 mole of h2sor.

    asked by Anonymous
  228. problem solving

    random sampling for tensile strenght 6500 5800 6150 6050 5900 6150 6200 5880 6130 5880dtetermine % 6000psi 67000psi 68000psi

    asked by veronica
  229. algebra

    i have tried alot of different ways of doing this problem but i cant find the right answer. QUESTION:2and2/3 plus 2/3 plus 1and1/3

    asked by John
  230. algebra

    Use the quadratic formula to find the zeros of the function. Round to tenths if necessary. y = 17x^2 - 21

    asked by tracy
  231. Physics

    A roller coaster travels 41.9 m at an angle of 15.0◦ above the horizontal. How far does it move horizontally? Answer in units of m

    asked by Anonymous
  232. algebra

    each week you gave a quiz in social studies and science class. find the probability both quizzes given on the same day tell if independent or dependent

    asked by barb
  233. Poetry

    This is my poem. :P Does it fit into the theme of loneliness? Loneliness Never Sleeps. I scream, call for help, my lungs frozen in ice I can't breathe, I'm alone, my screams don't suffice My heart pounding hard, wishing someone would hear I begin to taste

    asked by Izzy
  234. ETH125

    Did Hungarians face prejudice, segregation, racism, or any combination of the three?

    asked by samm
  235. Math

    Janice is running a 7613 meter race. Assume the she runs at a constant speed of 287 meters per minute. Express the function f(t) that gives her distance from the finishing line t minutes after the start of the race.

    asked by Cortney
  236. physics

    A car has a mass of 1.34 × 10^3 kg. If the force acting on the car is 6.46 × 10^3 N to the east, what is the car’s acceleration?

    asked by Stephen
  237. Math( help please ! )

    for what value of k will the function f(x)=kx^2-4k+k have no zeros the graph of the function f(x)=x^2-kx+k+8 touches the x-axis at one point. What are the possible values of k

    asked by Poppy
  238. Math( help please ! )

    a) f(x) = 4.1x +92.16 b) f(x) = 17.9x + 19.36 c) f(x) = 8.8x + 55.4 ANSWERS: a) 4.8 b) 0.93 c) 2.2, i just have no clue how they got these answers EXTRA INFO: The demand function for a new product is p(x)= - 4x +42.5, where x is the quantity sold in

    asked by Poppy
  239. Math( help please ! )

    In class we learnt operation with radicals how would you answer a question like this determine the length of the line segment from A(-2,7), to B (4,1)?

    asked by Poppy
  240. English

    what is immperative sentence and interrogative sentence

    asked by christian
  241. physics

    A girl starting from rest at the top of a 40 m jump, inclined at 30º above the horizontal, has 0.15 coefficient of friction. The jump ends with a frictionless, horizontal part. How far does she land away from the jump, which is 50 m above the horizontal

    asked by hum
  242. Functions

    write a function. f(x), that represents the cost of renting a car for x days with a total of 80 kilometers if there is a fixed charge of $17 per day and a charge of $0.35 per kilometer.

    asked by Cortney
  243. Business

    How do you think the mode of communication—written, verbal, or electronic—influences the interpretation of a message?

    asked by Diane
  244. math

    For a fixed element 'a' of a ring R, prove that the set {x exists in R such that ax=0)is a subring of R.

    asked by Melissa
  245. Stats

    The linear correlation coefficient is a numerical value that ranges from -1.00 to +1.00. Describe in a sentence or two the meaning of each of these correlation coefficients: a) -1.00 b) +1.00

    asked by Jennifer
  246. physics

    The force of tension of a rope is 300N. If a man is 50 m above the ground, what is the longest time it could take him to get to the bottom?

    asked by dew
  247. SCIENCE

    How much variables shoulld be changed?

    asked by SHIPOFSH**
  248. English/writing

    But would you put commas, periods or anything like that in it. Would every sentence begin with a capital?

    asked by Mattie
  249. HEalth

    how much carboydrates we need in percentage in a day how much Fats we need in a day in percentage Why do we need fat how much percentage of protein we need what is complex carbohydreates

    asked by ZUICK
  250. Physics

    I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints

    asked by Belinda
  251. sci

    Extinction is a natural selection process. Should humans strive to preserve a representative sample of all biomes or aquatic zones? Why should humans be concerned with the extinction rate?

    asked by ronnew
  252. biology

    what questions do affected people, potential parents, and families face when a diagnosis of the sickle cell anemia is made

    asked by mas
  253. English/writing

    If I am writing the following as a poem, how would I punctuate it- would each letter at the beginning be a captial, would it have commas or a period. We are room 204 Check out our door It is clear to see We choose to be drug free

    asked by Mattie
  254. Finance

    Consider a firm that has decided to make, but has not yet announced, a large “bonus” cash dividend amounting in the aggregate to $5 million. The firm has 1 million shares outstanding that sell for $20 each. The firm has no debt; there are no taxes; and

    asked by Dantes
  255. Chemistry Help!!

    which element do not combine readily with other elements because they already have eight electrons in their outermost shell?

    asked by Maci
  256. Help With math

    Solve (3x-2)^2=2

    asked by katie A
  257. trig

    Solve system of inequalities by graphing Yx+4

    asked by theo
  258. dove elem

    jill bought a coat for $500 dollars the sale tax rate was 7% . what is the total cost of the coat including sales tax

    asked by jerry
  259. math

    A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.8 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.) M =

    asked by Anonymous
  260. AED200

    an outline of your Educational Debate Persuasive Paper. The outline should be based on one of the educational debates found in Appendix A and should highlight the main points of your paper. Include an annotated bibliography of at least three sources you

    asked by raina
  261. Algebra 2

    Factor. 2x⁴ + x³ + 2x² + 4x - 24

    asked by Peter
  262. Algebra 2

    Factor. (y-1)⁴ - (y-1)²

    asked by Peter
  263. Spanish-8th grade

    We're doing superlatives and we had to have three groups of sentences. Did I compare these correctly?I numbered each group as 1, 2 or 3, not each sentence in the group. 1.Tocar el piano es interesante. Tocar la guitarra es más interesante que tocar el

    asked by Victor
  264. social studies

    write a poem on resoures(word should rhyme)

    asked by nikheel
  265. Math

    For what values of k will the function f(x)=3x^2-4x+k have on x-interccept

    asked by Ariel
  266. Calculus

    If a_n does not equal zero for any n>=1 and ∑a_n converges absolutely, then ∑ 1/|a_n| diverges. The series are from n=1 to infinity. I think this is true but I'm not sure.

    asked by Jeff
  267. organic chemistry

    how could you obtain benzaldehyde from toluene?

    asked by brock
  268. Math

    Least to greatest Plz help me ....o.o101-0.100-0.110-0.0011 Plz help me to find a least to greTesT.

    asked by Hiba
  269. physics numerical

    an electron moving with the speed of 1067 m/s is passed into a magnetic field of intensity 0.1T normally.what is the radius of the path of the electron inside the field? if the strength of the magnetic field is doubled, what is the new radius of the path?

    asked by brock
  270. physics numerical

    a parallel combination of two resistors of 2ohm each has third resistor of 4ohm in series with the combination.if a battery of 10V with negligible internal resistance be applies across them,find the p.d. across the resistor.

    asked by brock
  271. math

    what is the percent of 438 to 789

    asked by felix
  272. zoology

    what is diastema?

    asked by brock
  273. Math

    The question is A rectangular has parameter of 24 units ,if width is 24 units what is length. I don't get how to use units .I would appreciate if some one willing to help me .

    asked by Bbana
  274. zoology

    define stroke volume.

    asked by brock
  275. chemistry

    what will happen when you drop a ball of naphthalene in a 25ml gasoline.will it dissolve or not?

    asked by ram
  276. english

    the comment of one little boy was especially movinng

    asked by shawn
  277. math

    what is 42-37 thanks.

    asked by sarah
  278. English

    I urgently need your help to translate this school profile into English. Thank you. I included another sentence, too. 1) Students aged between sixteen and eighteen can opt for the bilingual branch (??) and study subject like Geographie/Earth Science,

    asked by Henry2
  279. hilosophy

    a specific moral question which might make it difficult to accept the relativist's response. State the moral issue involved, and provide an explanation as to why you think a relativist might have problem giving a justified response to it

    asked by Dawn
  280. algeBRA WORD PROBLEM

    six familys split the cost of a family reunion. each family also spends $65 for a hotel room. Each familys share of the cost of the party plus the cost of the hotel room totlas $160. write and solve and equation to find the cost of the reunion. i don't

    asked by marko
  281. math

    how you figure percents like percent of438 to 789

    asked by felix
  282. Statistics

    Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.

    asked by jane
  283. English

    I still have a doubt. Could you check these sentences, too? I last saw Mary a month ago. The last time I saw Mary was a month ago. It has been two months since I last saw her. It has been two months since I saw her for the last time

    asked by Henry2
  284. Algebra 2

    Factor. -16 + 17(5-y²)-(5-y²)² and [x + y + 1][x² - x(y + 1)+(y + 1)²

    asked by Peter
  285. Calculus

    If a_n>0 and a_(n+1)

    asked by Raaki
  286. Math

    In class we started operation with radicals how would you answer a question like this determine the length of the line segment from A(-2,7), to B (4,1)?

    asked by Lindsay
  287. science

    name 3 effects that can be caused by friction

    asked by renee
  288. statistics

    perform a two tail hypothesis test on both the legal services satisfaction and the sentence satisfaction variable's data using a .05 significance level.

    asked by Porsha
  289. math

    a tank can be filled by one pipe in 3 .5 hours and emptied by another in 4.2 hours.if both ipes are running, how long will it take to fill an empty tank?

    asked by patel
  290. physics

    A ball is thrown straight up with an intial velocity of 85 ft/s. At what times will it have a height of 200 ft?

    asked by Anonymous
  291. math

    write 0.9,2/8,0.35 from least to greatest

    asked by sweetzaidie
  292. science

    why do scientist only change one varieble at a time during a experiment ?

    asked by sweetzaidie
  293. French

    What are some french adjectives that end in ant? I'm trying to make a french poem and need words to fit in the blanks: 1. Quand la vie est une fleur Chaque jour est ______ 2. Quand la vie est un livre Chaque jour est ______ 3. Quand la vie est une

    asked by Rebecca
  294. programming

    Write a code segment that inputs an integer from cin, and then outputs a row of that many stars on cout.

    asked by Ayuda!!!
  295. jlc

    Three is the first number of pair and 8 is second if 50 is first number what is second number?

    asked by matthew
  296. algebra

    Use the quadratic formula to find the roots of the equation. Round to tenths if necessary. 3x^2 - 4x - 8 = 0

    asked by tracy
  297. religion

    what did hebrews do to please their gods?

    asked by laura
  298. Chemistry

    Hi, I have a question on column length for HPLC (high performance liquid chromatography). If the column length is increased,eg from 100mm to 150mm and all other column parameters e.g. particle size of stationary phase, internal diameter..etc.remain the

    asked by angie