Questions Asked on
March 19, 2014

  1. Chemistry

    The energies, E, for the first few states of an unknown element are shown here in arbitrary units: n= 1, E=-21 n=2, E=-9 n=3, E=-4 n=4, E=-3 ...,... infinity, 0 A gaseous sample of this element is bombarded by photons of various energies (in these same

    asked by tec
  2. Physics

    Calculate the force of friction that keeps a 80-kg person sitting on the edge of a horizontal rotating platform when the person sits 2.4m from the center of the platform and has a tangential speed of 3.2m/s . Express your answer to two significant figures

    asked by Cassie
  3. math

    Mr.Ricci spent 1/3 of his salary on food and 2/5 of the remainder on transport. What fraction of his salary did he have left? If he had $600 left, find his salary.

    asked by Kate
  4. trig

    cos/sin use 2npi and tan uses npi, but how do you know when to add 2npi or npi to the solution of the equation?

    asked by Anonymous
  5. Math (algebra)

    Could you help me with this math question: A can in the shape of a right circular cylinder is required to have a volume of 500 cubic centimeters. The top and bottom are made of material that costs 11 cents per square centimeter, while the sides are made of

    asked by Kyla
  6. Physics

    A Plane flies north at 215 km/h. A wind from the east blows at 69km/h. What is the plane's new velocity with respect to the ground in standard position

    asked by James
  7. Math (algebra)

    Hi could you please help me with this algebra question. A rectangle has one corner on the graph of y=36-x^2, another at the origin, a 3rd on the positive y-axis, and the fourth on the positive x-axis. Express the area A of the rectangle as a function of x.

    asked by Kyla Bills
  8. Organic Chemistry

    Draw every stereoisomer for 1-bromo-2-chloro-1,2-difluorocyclopentane. Use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring, adjacent to each other.

    asked by Lauren
  9. ratio

    given the proportion a/b=5/19, what ratio completes the equivalent proportion a/5= / ? a. a/19 b. b/19 c. 5/19 d. 19/b

    asked by heather
  10. Finance

    Anderson International Limited is evaluating a project in Erewhon. The project will create the following cash flows: Year Cash Flow 0 –$690,000 1 243,000 2 175,000 3 256,000 4 231,000 All cash flows will occur in Erewhon and are expressed in dollars. In

    asked by Paul
  11. Algebra ll

    Help please, I don't understand how to do this... Give an example of an arithmetic sequence that is found in the real world. Find the common difference and write a recursive and iterative rule for the sequence. Use one of the rules to find another term of

    asked by Me and I
  12. Chemistry

    What mass of lithium (in g) is required to react completely with 57.5mL of N2 gas at STP? Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)→2Li3N(s)

    asked by Carter
  13. Physics

    Prove that tanø is equal to U(k) when the block slides down the incline with a constant speed. (Use symbols, not numbers.)

    asked by Veronica
  14. English

    Posted by rfvv on Wednesday, March 19, 2014 at 2:24am. 1. It's very noisy here. I can't stand it any more. (What does "it" refer to in the first sentence? What does "it" refer to in the second sentence? Are both the same? Is 'it' an impersonal pronoun or

    asked by rfvv
  15. MATH QUIZ PLS HELP!!!

    1.Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ©£ and round to the nearest tenth. 439.6 ft^2 324.5 ft^2 571.5 ft^2 285.7 ft^2*** 2.Find the surface area of a square pyramid with a base length of 24 cm

    asked by TTR+S<3
  16. Heath/Wellness

    Write a 300-500 word essay. Provide three examples of sporting events, or fitness activities, with which you have been involved. Describe what energy pathway was used in that sport or activity and explain why you are matching the pathway with the activity.

    asked by Jennifer Mesey
  17. chemistry

    Knowing the concentration of a solution allows us to find all of the following except A. the mass of a solute. B. the mass of the solvent. C. the volume of the solvent. D. the concentration of a solution when conditions change.

    asked by Natalie
  18. chemistry

    *the molar solubility of BaCo3 in 0.50M Bacl2 solution IS?ksp(1.6*10^-6) I CALCULATED AND GOT 3.2*10^-9 WANT TO MAKE SURE IF IT CORRECT

    asked by jessina
  19. Chemistry

    KClO3 = KClO4 + KCl What is the conversion factor to convert between moles of potassium chlorite and moles of potassium perchlorate?

    asked by Valarie
  20. phsyics

    A car races on a circular track of radius r. (a) Write an equation for the car's average speed when it travels a complete lap in time t. (b) The radius of the track is 100 m and the time to complete a lap is 14 s. Show that the average speed around the

    asked by price
  21. math

    Bonita bought 2 and 1/5 kg of potatoes and 1 and 1/2 kg of carrots. How much more potatoes than carrots did she buy?

    asked by Mei
  22. math help

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

    asked by Jennifer
  23. math help!

    f(x) is a quadratic function such that f(1) = 3 and f(5) = 3. Find the x coordinate of the vertex of the graph of f.

    asked by tania
  24. Physics

    A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision? Answer a. 0.394 kg·m/s

    asked by Jake
  25. Math - PreCalc (12th Grade)

    Jake has decided upon three business ventures to invest in. The total cost of investing in all three ventures will be $15,000. Investing in the first venture will cost $3,000 more than investing in both the second and the third venture. According to

    asked by Shawna
  26. math

    A water heater has a diameter of 18 inches. It sits in a drain pan that has a diameter of 22 inches and a height of 2 inches, as modeled in the diagram below. Water that leaks out of the water heater sits in the drain pan. Which of the following is closest

    asked by Tanya
  27. Math

    suppose you have 2 dimes ad 3 quarters in a bag. You shake it so that 2 coins fall out. 1) What is the probability that both coins are quarters? 2) both coins are dimes? 3) both coins are the same? 4)you shake out one of each coin?

    asked by Matt
  28. Physics!

    Consider someone in a rotating space habitat. The outward force felt by the person A.has no reaction counterpart B.is an interaction with Earth C.is a form of gravity D.is real in the traditional sense

    asked by Anonymous
  29. physic

    A 47.5-g golf ball is driven from the tee with an initial speed of 41.8 m/s and rises to a height of 34.5 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 8.88 m below its

    asked by Anonymous
  30. Math: Statistics Least squares line

    Find an equation of the least squares line, then use it to complete the table. X- 111 169 230 287 335 ? Y- 2 3 4 5 6 7 Extrapolation I missed the lesson on this and as far as I can tell I think the least squares line is y= .01764x+ .oo693 If anyone could

    asked by Lola
  31. Chemistry

    Calculate the pH of a solution in which a. [H3O+] = 7.8 x 10-7 M pH = b. [H3O+] = 5.1 x 10-6 M pH = c. [H3O+] = 6.1 x 10-5 M pH = d. [H3O+] = 9.3 x 10-4 M pH = I get 8.1 9.5 9.1 6.7 but its wrong please someone help!

    asked by Danny
  32. psychology

    the cognitive psychology is primarily concerned with

    asked by art and social sceince
  33. psychology

    TMA: TMA1/CSS121

    asked by art and social sceince
  34. Chemistry

    A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was

    asked by Anonymous
  35. phsyics

    An airplane with an airspeed of 60 km/hr lands on a runway where the wind speed is 40 km/hr. (a) What is the landing speed of the plane if the wind is head-on? (b) What is the landing speed if the wind is a tailwind, coming from behind the plane?

    asked by price
  36. Chemistry

    Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an impact, a sensor ignites a detonator cap that sets off the following rapid reaction: 2NaN3(s) → 2Na(s) + 3N2(g) Part A What

    asked by keitanako
  37. chemistry

    a gas with a volume of 4.00 L at pressure of 205kPa is allowed to expand to a volume of 12.0L. what is the pressure in the container if the temp remains constant

    asked by Anonymous
  38. Chemistry

    1. A chemist prepares a solution by dissolving 4.603 g of NaNO3 in enough water to make 200 mL of solution. What molar concentration of sodium nitrate should appear on the label? Answer in units of M 2.If the chemist mistakenly makes 225 mL of solution

    asked by Bob Ewell
  39. pharmacy tech

    . To find out if a drug causes nausea, you would look in this section of the drug monograph

    asked by jen
  40. math (check)

    find the volume of a cylinder with a diameter of 16mm and a height of 5.7. A.2,292mm^3 . . . 4,584mm^3(i think its this one) . . . 689mm^3 . . . . 1,146 (but i also got an answer close to this but the tens place was 5)

    asked by luna
  41. MATH

    BRIANNA HAS 4 PINK BRACELETS

    asked by mary
  42. Physical Science

    When mixing colors of light, why does combining a secondary color with its complementary color give white light? I can't find the answer in my book, please help!

    asked by Alex
  43. Human relations

    A female doctor attempting to explain to her 27-year-old male patient that his severe acne can be cured with a specific drug, but the side effect of the drug might be that he will be temporarily bald.

    asked by Holly
  44. chemistry

    Calculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation. a. [OH-] = 2.8 x 10-7 M b. [OH-] = 8.8 x 10-3 M c. [OH-] = 2.4 x 10-11 M everytime I do the problem In the calculator I get system

    asked by Danny
  45. English

    1. Today is April 15th. 2. Today will be sunny and warm this afternoon. (Are both grammatical?)

    asked by rfvv
  46. us history

    Hello! Can you please help me?? 1. In the 1800s, there was a wave of religious fervor known as the () Religious Right. (x) Second Great Awakening. () Religious Awakening. () Revival Times. 2. What movement called for drinking little or no alcohol? ()

    asked by Anonymous
  47. Chemistry

    What is the concentration of hydronium ions in a solution that is 0.12 M HBrO(aq) and 0.160 M NaBrO(aq)?

    asked by Lucy
  48. math

    of the total number of spectators at a circus show, 1/4 are men. 2/5 of the remaining number of spectators are women. there are 132 women at the circus show. how many children are at the circus show? I don't know what to do help me!!! :-(

    asked by shmoolalalalalalaletyevity
  49. Chemistry

    The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M.

    asked by Anonymous
  50. biology

    In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). The mechanism for inheritance of the sex chromosomes is exactly the same as for X and Y sex chromosomes in other species. In chickens the character of

    asked by raj
  51. Chemistry

    I'm having trouble trying to figure out how to setup and solve these problems: 1) 2,600.0 mL of air is at 20.0C. What is the volume at 60.0C? 2) A gas occupies 900.0 mL at a temperasture of 27.0C. What is the volume at 132.0C? 3) What change in volume

    asked by Austin
  52. Math - PreCalc (12th Grade)

    What is the left-hand limit of f(x)=|x−3|/x−3 as x approaches 3? A) 1 B) 2 C) 0 D) -1 E) -2

    asked by Shawna
  53. Science URGENT PLEASE

    1. what would you expect the pH value for grapefruit juice to be? (>7, 7,

    asked by Anonymous
  54. science

    When a switch is turned from the off to the on position, it is changing the circuit in which of the following ways?

    asked by toni
  55. statistic****help*****

    if three coins are tossed, what is the number of equally likely outcomes? 3 4 6 8 9

    asked by HELEN
  56. biology

    What graphic could you use to best show the checkpoints in the cell cycle? a. line graph b. bar graph c. flowchart d. map I'm not sure, I think it's c?

    asked by Anonymous
  57. Algebra Based Physics

    A 2.50-kg steel ball strikes a massive wall at 10.0 m/s at an angle of θ = 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is in contact with the wall for 0.224 s, what is the

    asked by Anonymous
  58. Science

    If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can

    asked by Bailey
  59. A Peculiar Question

    Is either a B+ or an A- considered a terrible grade? If I received a B+ for two essays that I was assigned and then an A- for another, will these grades ultimately cause a decrease in my GPA? I want to enter into either a film or art college, and I want to

    asked by Anonymous
  60. math

    Factor out the greatest common factor in each question. 1. 7× + 21 2. 12n - 9 3. 10c + 30 4. 10b + 25

    asked by ★★ PLEASE HELP ★★
  61. Description

    Which of the following sentences are considered as a description of the terms "active voice" and "passive voice"? "Sentences written in the active voice are often less wordy and more direct than those written in the passive voice." Or "A verb in the active

    asked by Anonymous
  62. Geography Answer Evaluation (Ms. Sue)

    Which four seas border Italy? My answer: The Adriatic, Ionian, Ligurian, and Tyrrhenian Seas border Italy.

    asked by Anonymous
  63. College Math

    In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology

    asked by Ed
  64. physics

    A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 7.60kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box. If the box is initially at rest at x=0,

    asked by gzag
  65. Chemistry

    I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

    asked by Amanda
  66. Chemistry

    what is the mass in grams of one molecule of water?

    asked by Katie
  67. Math Polygons

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

    asked by Caroline
  68. maths

    5^(logx) + x^(log5) = 50 . Find x

    asked by sunkanmi
  69. Grammar

    What is the part of speech of the word "bliss"?

    asked by Anonymous
  70. Math

    Mrs. Meier had 3/5 kg of sugar. She used 1/4 of it to make cookies. How much sugar did she use to make the cookies?

    asked by Angel
  71. Chemistry

    Determine the specific heat of a material if a 34.7 g sample absorbed 45.2 J as it was heated from 293 K to 318 K. Answer in units of J/g · K Your answer must be within ± 2.0%

    asked by Danny
  72. math

    Danny bought 6 packets of drink. Each packet contained 1/4 liter of drink. Find the total amount of drinks in liters.

    asked by Adam
  73. Chemistry

    If 689000 J of energy are added to 4.00 L of water at 284 K, what will the final temperature of the water be? Answer in units of K

    asked by Danny
  74. Physics

    A 11 kg box slides 4.2 m down a frictionless ramp and then collides with a spring whose spring constant is 250 N/m. What is the maximum compression of the spring? I got 1.35 m but it is incorrect. Any help would be great!

    asked by Mark
  75. CHEMISTRY

    What is the mass in grams of one Mole of water?

    asked by Katie
  76. Puncuation

    Am I supposed to write the definition, pronunciation, and part of speech of the word "bliss" like this? Bliss /blis/ (noun): perfect happiness; great joy.

    asked by Anonymous
  77. algebra

    Michelle has 45 books. Olivia has b fewer books. Which expression represents the total number of books Olivia has?

    asked by isabella
  78. Math

    A 12-foot ladder is leaning against a wall. The base of the ladder is 4 feet from the wall. How tall is the wall?

    asked by Natasha
  79. Dont I need more info for this Math problem??

    You borrow $2,000 at a rate of 3% for a period of 4 years. How much will you re-pay at the end of 4 years? This is a 7th grade math question and I feel like it's a trick question. I am thinking that I should use the simple interest formula, but I know that

    asked by SDog
  80. Finance

    Handy Enterprises has gathered projected cash flows for two projects. Year Project I Project J 0 –$215,000 –$215,000 1 104,000 75,000 2 93,000 86,000 3 79,000 96,000 4 72,000 105,000 Requirement 1: At what interest rate would the company be indifferent

    asked by Paul
  81. please answer this one..

    what is the mass in grams of one molecule of water... and is this one different from what is the mass in grans of one mole of water?

    asked by Katie
  82. Math

    two angles are vertical. if angle A is 37 degrees, what is the measure of angle B?

    asked by Natasha
  83. planning. and leadership

    Which one of the following ia a defensive strategy.

    asked by lovely
  84. emily

    some skin creams claim that they are "pH balanced" and yet do not have a pH of 7. what do they mean when they say pH balanced?

    asked by please answer!! ASAP
  85. math

    sub 780 for x -2,5x^2 +2825x -115,812.5

    asked by WINSTON
  86. Chem

    In the lab a 3.3mol per liter solution was prepared by adding H2O to 140mL of a 4.3mol Per Liter solution of HCL. How much water was added?

    asked by BILL
  87. Applied Math (Biological application)

    The deformation y(t) of heart muscle from its rest position after t seconds can be modelled as a spring-mass system, described by the differential equation: my" + vy' + ky = F(t) where m, v, and k are positive constants denoting the mass of the myocardial

    asked by Joey
  88. A Peculiar Question

    If I have been given a B+ for two essays, it is considered a terrible grade? Will it affect my report card?

    asked by Anonymous
  89. Finance

    Handy Enterprises has gathered projected cash flows for two projects. Year Project I Project J 0 –$215,000 –$215,000 1 104,000 75,000 2 93,000 86,000 3 79,000 96,000 4 72,000 105,000 Requirement 1: At what interest rate would the company be indifferent

    asked by Alec
  90. Rate Law - Chemistry

    I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

    asked by Amanda
  91. chemistry

    I feel like this question is pretty easy, but I can't seem to figure out how to go about solving it. It's like the solution is on the tip of my tongue: Nitromethane (CH3NO2) burns in air to produce significan amounts of heat. 2 CH3NO2(l) + 3/2 O2(g) -> 2

    asked by Jamie
  92. algebra

    Write the numeral as a Roman numeral. 503,303 A. MMCCCIII B. MMMCCCIII C. MMCCCXIII D. MMCCIII

    asked by monique
  93. Math

    One of my questions say 16, base 4. It says to write it as an exponent but which one is which?

    asked by Michelle
  94. MATH

    1/8 OF TONY'S BOOKS ARE MYSTERY BOOKS

    asked by mary
  95. chemistry

    How many moles of sodium chloride can be produced if 29g of Magnesium Chloride are reacted in the reaction 2NaNO3 + MgCl> 2NaCl+Mg (NO3)2?

    asked by green
  96. statistics

    Find z such that 7.1% of the standard normal curve lies to the left of z ?

    asked by leia
  97. science help pleasee

    what type of bonding is phosphoric acid?

    asked by anonymous
  98. Chem

    When 100mL of 0.60mol per liter K3BO3 is added to 200 mL of 0.40 mol per liter Ca3(BO3)2 Find a)moles of K3BO b) moles of Ca(BO3)2 c)final concentration of K+ d)final concentration of Ca+2 e) final concentration of BO3 negative 3

    asked by BILL
  99. phsyics

    the coefficient of volume expansion for iron is 3.6 X 10^-5/C degrees. If a 17 m long rod of iron is cooled from 100 degrees C to 5 degrees C, What is the new length?

    asked by mel
  100. science

    A meteorite weighs 300 Newtons on the moon. the moons force of gravity is 1/6 that of earth. what is the meeorites weight on earth?

    asked by kimmy plus
  101. business management

    how can an organisations strategic and business plan influence staff recruitment, selection and induction?

    asked by steph
  102. math algebra

    a square parking lot has a surface area of (w^4-2w^2x+x^2) square feet. Factor this trinomial to find the length of one side in feet.

    asked by carl
  103. Algebra

    Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?

    asked by Anonymous
  104. Algebra

    Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?

    asked by Anonymous
  105. statistics

    If boys and girls are equally likely and groups 400 births are randomly selected find the standard deviation

    asked by Anonymous
  106. Chemistry

    In a heating and cooling curve, I understand that the flat part means that the bonds are either forming or breaking, depending on if the input of energy is increasing or decreasing, but what is happening to the bonds in the slanted parts? Thanks!

    asked by Serena
  107. English

    1. It's very noisy here. I can't stand it any more. (What does "it" refer to in the first sentence? What does "it" refer to in the second sentence? Are both the same? Is 'it' an impersonal pronoun or just a pronoun which refers to something that is

    asked by rfvv
  108. MATH (check please)

    find the lateral area of a cone with a radius of 7ft. and slant height of 13ft, use 3.14 for pi and round the nearest tenth. . . . . A.439.6 ft^2 . . . . . B.324.5 ft^2 . . . . . . C.571.5 ft^2 . . . . . . D.258.7 ft^2(I PICKED THIS ONE)

    asked by luna
  109. Statistics

    A random sample of 150 towns in a western state had a mean annual precipitation of 2.86 inches. Assume that the population standard deviation is known to be 0.78 inches. Compute the 95% confidence interval for μ.

    asked by Kathy
  110. english

    how would you start off an essay that is about the lack of privacy you have? (has to be in first person)

    asked by anonymous
  111. physics

    The drawing shows a skateboarder moving at 6.93 m/s along a horizontal section of a track that is slanted upward by 45.6 ° above the horizontal at its end, which is 0.654 m above the ground. When she leaves the track, she follows the characteristic path

    asked by Anonymous
  112. Chem

    A 7.00 mL sample of blood serum has a pH of 7.38 a. What is the concentration of H3O+? b. What is the concentration of OH-? c. How many moles of H3O+ are present? I have no clue what to do and I don't have a calculator with me someone help me I would

    asked by Johnny
  113. math

    What numbers value is 100, 000 less than 1, 547, 298?

    asked by Martha
  114. math --- check my work!

    1.Find the surface area for a sphere with a radius of 10 feet. Round to nearest whole number. 1,256 ft2*** 4,189 ft2 1,089 ft2 1,568 ft2 2.Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. 1,257 ft3 4,187 ft3*** 1,089

    asked by TTR+S<3
  115. Business

    I really need help learning how to understand & fill out an income statement packet, ASAP!

    asked by Paige
  116. Math

    A man completed a trip of 136 km in 8 hrs. Some part of the trip was covered at 15 km/hr. What is the part of the trip covered at 18 km/hr?

    asked by Abhishek
  117. math

    bill and jane are 1080 miles apart. They start driving towards each other at exactly the same time. Bill travels at 70 mph. Jane travels at 65 mph. How long must they drive before they meet?

    asked by ray
  118. physics

    A pitcher throws a 0.198-kg baseball, and it approaches the bat at a speed of 57.5 m/s. The bat does 85.1 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.7 m above the

    asked by Anonymous
  119. Criminal investigation

    If you had information about a crime, would you be an official informant for the authorities? What would your concerns be? I don't think you would be a official informant, but im not sure what by concerns would be. Can somebody help?

    asked by Alex
  120. MATH

    sub 789 for x -2.5x^2 +2825x-115,812.5

    asked by WINSTON
  121. math

    A lounge suite is on sale for 15% off its original price. On sale the price of the suite is R8000. How to calculate the original price?

    asked by Michael
  122. math

    in acertain ratio of boys and girls is 4:5. if the class has 54 students, how many are girls?

    asked by BS42
  123. statistic****help*****

    Show all your work. Indicate clearly the methods you use because you will be graded on the correctness of your methods as well as on the accuracy of your results and explanation. A simple random sample of adults living in a suburb of a large city was

    asked by akiba
  124. Quick Science Question

    I have a question. Is a Atwood Machine a suspended pulley? I have question asking me what the machine is, and there are two answers with the word pulley in them. I am really confused between the two. I have tried looking it up, and I get confused again

    asked by Brady
  125. understanding and managing money

    guarantee replacement cost in a homeowner's insurance policy means that the insurance company

    asked by nelda
  126. Physical Science

    The current in a toaster oven is 15 A when plugged into an electrical outlet that is 110 V. How much electric power is used by the toaster oven? Formula: P = IV

    asked by Anonymous
  127. Chemistry

    I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

    asked by Amanda
  128. Physics

    A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision?

    asked by Jake
  129. Phy

    A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. the combined mass swings up to a height of 8.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision? Answer a. 0.394 kg·m/s

    asked by Jake
  130. math

    If a school canteen makes 72 sandwiches and sells 5/6 of them how many are sold

    asked by theresa
  131. physics

    Two cars start off a race with initial velocities u0 and v0, and travel in a straight line with uniform acceleration á and â. If the race ends in a dead beat, prove that the length s of the race is: s=(2(u_0-v_0)(u_0 â-v_0 á))/(â-á)^2

    asked by Anonymous
  132. Math

    What is the answer to 4+3p=19 ?

    asked by Keyera
  133. Biology

    A poultry farmer hopes to profit from the current craze for keeping egg laying chickens as pets and wishes to increase his stock of interesting and unusual breeds. (a) The farmer crossed a pure-breeding white chicken with a pure-breeding black chicken and

    asked by raj
  134. Math

    How do you solve 6k-8=k+2???

    asked by Natasha
  135. Math - PreCalc (12th Grade)

    If the length of the minor axis of an ellipse is 6 units and the length of the major axis is 10 units, how far from the center are the foci located? A) 4 units B) 2 units C) √4 units D) √8 units E) 5 units

    asked by Shawna
  136. maths

    A dress cost $1600 after 20% discount was given.What was the price of the dress before the discount.

    asked by allisha lewis
  137. Economics

    Which of the following is not a factor of production? A. Capital B. Goods and Services C. Labor D. Land

    asked by Nina
  138. Chemistry

    Calculate the number of moles of ag in 5ml of .004m agno3 and the number of moles of cr04 in 5ml of .0024m k2cro4

    asked by Candice
  139. Science question, only 1

    What would be the consequence of an ecosystem that had no nitrogen-fixing bacteria? Nitrogen from decomposing animals would never be returned to the soil. Decomposers would not be able to break down the nitrogen present in plants they feed on. Plants would

    asked by anonymous
  140. Chemistry

    Calculate the change in mass of the In electrode after the cell supplies 100 mA of current for 10 minutes. The balanced redox reaction is 2In+Cl2=2In+ + 2Cl-. I understand the idea behind the question, I just don't know if I should use 1 mol In per 1 mol

    asked by anonymous
  141. math

    Why is comparing fraction s hard?

    asked by ronaldo
  142. Health

    There are ________ of muscles that are responsible for chewing movements or mastication.

    asked by Jackson
  143. math

    What is 11.11

    asked by Anonymous
  144. Chemistry

    I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

    asked by Nicole
  145. math

    Evaluate cot -220o Round your answer to the nearest hundredth. A. -1.31 B. 1.56 C. -1.19 D. -0.84

    asked by tiana
  146. grammar

    The patient’s first visit, to the office, was for lower back pain.

    asked by Anonymous
  147. SCIENCE 1 QUESTION PLS HELP!!!!!

    3. Which of the following describes the relationship between friction and inertia? (1 point) When there is more friction, there is less inertia. When there is less friction, there is more inertia. When there is more friction, there is more inertia. When

    asked by TTR+S<3
  148. physics

    A cylinder floats with its volume 3 cubic metre inside water. What is its total volume if its density 100 kg per cubic metre? Density of water is 1000 kg per cubic metre

    asked by Anonymous
  149. math trig

    a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle

    asked by mier
  150. Chemistry [back-titration] - please check my sol'n

    A 7.00 gram sample containing the mineral tellurite was dissolved then treated with 70.0 mL of 0.03114 M K2CrO7. 3 TeO2 + Cr2O7 ^2- + 8 H+ -> 3 H2TeO4 + 2 Cr3+ + H2O When reaction is complete, the excess Cr2O7 2- required a 14.05 mL back titration with

    asked by Nina
  151. algebra

    jim is 13 years older than tom the sum of their age is 75. how old is tom and how old is jim

    asked by tata
  152. chemistry

    If a tank contains 55.2 g of butane, what volume, in liters, of oxygen is needed to burn all the butane at 0.850 atm and 25 degrees Celsius? Need to show work too.

    asked by heather
  153. English??

    I am writing a recommendation paper on the type of medication to treat ADD/ADHD.. does anyone have an interesting idea for a title?? maybe something joke-ish? i cant think of anything and my teacher said it has to be something to 'draw the audience in'

    asked by Amanda
  154. Grammar

    Is this sentence grammaratically correct? "Although I already wished you one at Seminary this morning, I still hope you have a Happy Birthday."

    asked by Anonymous
  155. math trig

    verify the identities COSX OVER 1PLUS SINX PLUS 1PLUS SINX OVER COSX IS EQUAL TO 2SEC.

    asked by mier
  156. math trig

    a triangle has a measured of hypoteneuos 15 and an adjacent of 10 solve for the triangle.

    asked by mier
  157. Math - PreCalc (12th Grade)

    What is the right-hand limit of this function at x=2? g(x)=x^2−3/x−3 A) -1 B) 0 C) 1 D) 2 E) 3

    asked by Shawna
  158. geometry

    A person riding the original Ferris Wheel is traveling at a speed of 0.495 mph. If one revolution takes 9 minutes, what is the diameter of the Ferris Wheel? Show your work.

    asked by Brittany
  159. Math - PreCalc (12th Grade)

    What is the first natural number that causes the statement:(2+3)^n

    asked by Shawna
  160. Math - PreCalc (12th Grade)

    What does this function show at x = 5? f(x)=x^2−25/x−5 A) removable discontinuity B) jump discontinuity C) infinite discontinuity D) continuity E) none of the above

    asked by Shawna
  161. Math - PreCalc (12th Grade)

    What is the first natural number that causes the statement 1 + 3 + 5 +... + (2n − 1)

    asked by Shawna
  162. CHEMISTRY

    I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

    asked by Amanda
  163. MATH

    sub 789 for x -2.5x^2 +2825x-115,812.5 having troubble undeerstanding the process . could someone show me step by step..

    asked by WINSTON
  164. Science

    How much copper 2 sulfate do you need to react with 0.5grams of steel wool?

    asked by April
  165. math

    Find the solution to the system of equations given below using elimination by addition. 5x + 20y = 40 x + 3y = 6

    asked by tiffanette
  166. algebra: functions

    Which expression represents the quotient of f and 52?

    asked by Isabella
  167. uta

    the acidity constant of acetic acid is 1.8 x 10^-5. Calculate the % error of the measured Ka value of 1.82 x 10^-5

    asked by Anonymous
  168. Finance

    A company has just completed the third year of a five-year MACRS recovery period for a piece of equipment it originally purchased for $300,000. a. What is the book value of the equipment? b. If the company sells the equipment today for $180,000, and its

    asked by Nabil
  169. Maths

    A string of decorative lights is 28 ft long the first light on the string is 16 inches from the plug if the lights on the string are spaced 4 inches apart how many lights are there on the string

    asked by Pinks
  170. Physics

    I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the

    asked by SumSum
  171. physics

    what is the magnetic flux of a magnetic field of 3.5 x 10 T lassing a given circular surface with radius 30 cm

    asked by luhan
  172. Math

    how do you use the quadratic formula on a TI-83 calculator? I'm in algebra 1!

    asked by Anonymous
  173. mathematics

    If paul pays the newspaper company 70% of what he collects, how much would he keep for himself in a month when he collected $450.00?

    asked by ashley
  174. AP Chemistry

    A solution is 1.0M in AgNO3 and Fe(NO3)2.in the electrolysis of this solution using inert electrodes, the voltage is gradually increased. What is the order in which the substances in the solution would plate our or react at the cathode ? Assume that the

    asked by chemistinprogress
  175. Chem.

    N2+3H2 2NH3, The equilibrium constant for the chemical equation is Kp = 0.143 at 225 °C. Calculate the value of the Kc for the reaction at 225 °C.

    asked by Anonymous!!
  176. I NEED HELP PLEASE

    A trough is 8 meters long, 3 meters wide, and 5 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 5 meters, and base, on top, of length 3 meters). The trough is full of water (density

    asked by Hao
  177. Geometry

    I am pulling my hair out trying to figure out glide reflections. P-->P'(-2,-6) for the glide reflection where the translation is (x,y)-->(x,y-1) and the line of reflection is x=1?? A)(4,-5) B)(-2,-7) C)(-2,-5) D)(4,-6) Help please, I am a mom pulling her

    asked by Kandy
  178. math

    The first term of an AP is 8. The ratio of d 11th term to the 7th term is 5:8 calculate the common difference

    asked by victor
  179. statistics

    99% of men scored between -52.68 ,64.64 where did 95% of the values for weight relative to the ideal lie?

    asked by sandy
  180. math

    there are 18 boys in a class. there are W less boys than girls. How many students are in the class?

    asked by Anonymous
  181. Algebra

    If a salesman earned 6% commissions on sales, and in one week he earned $300 in commissions, how much merchandise did he sell that week?

    asked by Mandy
  182. math

    if a took a loan out for $12000 for one year at 10% simple discount what would be my interest

    asked by bill
  183. math

    If a took a loan of $12000 for one year at 9.5% simple interest what would be my interest

    asked by bill
  184. Business Math

    A comforter sells for $40 dollars and is marked up 40% of the selling price. What is the cost of the comforter?

    asked by Johnnie
  185. Math

    3 pieces of ribbon, each 85 cm long, are cut from a length of ribbon 3 m long. What is the length of the remaining piece of ribbon?

    asked by Romell
  186. Bus

    Guaranteed replacement cost in a homeowner’s insurance policy means that the insurance company A. guarantees they’ll replace the lost items for you. B. guarantees they’ll pay the current value of items lost. C. will pay you what it costs to replace

    asked by Pirurris
  187. physics question for damon (a clarification)

    Hi Damon! You helped me out in this question yesterday (jiskha. com /display.cgi?id = 1395185605) and I was wondering why you added gravity when calculating the friction. Thanks for your help!

    asked by gzag
  188. Science

    The total amount of ice in the Greenland ice sheet is estimated to be 2.85 million cubic km. Assume the Earth's surface is 70% covered by ocean, and that the Earth's radius is 6300 km. How many meters would sea level rise if the entire Greenland ice sheet

    asked by Bane Havoc
  189. Science

    CFC-11 and CFC-12 are very potent greenhouse gases. Suppose the emission of 1 Tg of CFC-11 causes a 1.0 W m-2 instantaneous perturbation in the radiation budget. The emission of the 1 Tg of CFC-12 causes a 1.5 W m-2 radiative forcing. The 100 year global

    asked by Bane Havoc
  190. math

    B(0,5) F(0,3) G(30,3) C(30,5) Find the area, Area BFGC =

    asked by jay
  191. Physics.

    Calculate the tension in a horizontal string that whirls a 1.9-kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units

    asked by Cassie
  192. Math

    A recipe for snack mix has a ratio of 2 cups nuts, 4 cups pretzels, and 3 cups of raisins. How many cups of nuts are there for each cup of raisins?

    asked by Charissa
  193. Physics

    Bats chirp at a high frequency which humans cannot hear. They use the echoes to detect small objects, such as insects, as small as one wavelength. If a bat were to emit a chirp at a frequency of 60.0 kHz and the speed of sound waves in the air are 340 m.s,

    asked by Steven
  194. FOSSILS PLEASE HELP

    Footprints and trails are examples of trace fossils? TRUE*** FALSE

    asked by Runtafus
  195. Language Arts

    In the sentence, "If you keep talking to me, I can't finish." would "to me" be a prepositional phrase? Thanks...

    asked by Brandi
  196. Social Studies

    What are some travel attractions in El Salvador? What are some famous celebrities from El Salvador?

    asked by Celest
  197. Statistics PLEASE HELP FINAL IN 1 HOUR

    Is a new hair shampoo product actually effective? Ask participants to grade themselves on scale of 1-10 how attractive their hair is both before and after using a shampoo product after 2 weeks Results Subject Initial Rating (A) Rating After 2 Weeks (B) 1 1

    asked by UCI STUDENT
  198. Finance

    Handy Enterprises has gathered projected cash flows for two projects. Year Project I Project J 0 –$215,000 –$215,000 1 104,000 75,000 2 93,000 86,000 3 79,000 96,000 4 72,000 105,000 Requirement 1: At what interest rate would the company be indifferent

    asked by Alec
  199. Math

    Any began a running program she ran less than 5/6 of a mile what part if a mile could any have run

    asked by Lisa
  200. Chemistry

    Calculate the pH of the solution that results from mixing 30.0 mL of 0.050 M HCN(aq) with 70.0 mL of 0.030 M NaCN.

    asked by Anonymous
  201. Chemistry

    How do you find the initial concentration of the acid give the titration curve of a weak acid-strong base titration?

    asked by Anonymous