Questions Asked on
March 31, 2012

  1. Pre-Calc Helppp!!!

    Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers so that B1 is smaller than B2.) a = 39, c = 40, angle A

    asked by John
  2. physics

    The weight of the atmosphere above 1 m^2 of Earth's surface is about 100,000 N. Density, of course, becomes less with altitude. But suppose the density of air were a constant 1.2 kg/m/s^3. Calculate where the top of the atmosphere would be.

    asked by C
  3. physics

    Estimate the buoyant force that air exerts on you. (To do this, you can estimate your volume by knowing your weight and by assuming that your weight density is a bit less than that of water.) Assume that your weight is a about 1000 N, for example.

    asked by C
  4. Chemistry help please

    i need some help understanding this problem please. How many moles of O are there in 32.4g N2O5, how many oxygen and nitrogen atoms are there in the 32.4g?

    asked by Mary
  5. chemistry

    An equilibrium mixture of SO2, O2, and SO3 at 1000 K contains the gases at the following concentrations: [SO2] = 3.77 10-3 mol/L, [O2] = 4.30 10-3 mol/L, and [SO3] = 4.13 10-3 mol/L. Calculate the equilibrium constant, K, for the following reaction. 2

    asked by antonio
  6. math

    10.For each of these sets of premises, what relevant conclusion or conclusions can be drawn? Explain the rules of inference used to obtain each conclusion from the premises. a)"if I play hockey, then i am sore the next day.""I use the whirlpool if i am

    asked by soasi piutau
  7. math

    there are fewer than 6 dozen eggs in a basket. If I count them by 2's there is 1 left over. If I count them by 3's there are 2 left over Three are left if I count by 4s. Four are left if I count by 5s. how many egs are there

    asked by sam
  8. physics

    In lab, Will burns a 0.6 g peanut beneath 48 g of water, which increases in temperature from 22 degree C to 55 degree C. The amount of heat absorbed by the water can be found with the equation Q =cm \Delta T, where Q is the amount of heat, c the specific

    asked by christy
  9. Chemistry

    Fe(s) + H2O(g) FeO(s) + H2(g) Calculate K for the above reaction, using the information which follows. H2O(g) + CO(g) H2(g) + CO2(g) K = 1.6 FeO(s) + CO(g) Fe(s) + CO2(g) K = 0.67

    asked by antonio
  10. chemistry

    According to the following reaction, how many grams of zinc hydroxide will be formed upon the complete reaction of 29.8 grams of water with excess zinc oxide? ZnO (s) + H2O (l) Zn(OH)2 (aq)

    asked by Anonymous
  11. Trig Circular Motion

    A es004-1.jpginch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.

    asked by Emily
  12. physics

    In a 25 degree C room, hot coffee in a vacuum flask cools from 72 degree C to 54 degree in 8 hours.Find its temperature after another 8 hours.

    asked by Kristie
  13. chemistry

    What is the concentration of Ag+ remaining in solution? Calculate the following when 0.250 L of 0.249 M AgNO3 solution is mixed with 0.350 L of 0.300 M Na2CO3 solution. Ksp for Ag2CO3 is 8.46E-12. A) What mass of the precipitate forms? I found out the

    asked by hellp
  14. NARAYANA

    a point charge q=-8.0nC is located at origin . find electric field vector at point x=1.2m,y=-1.6m

    asked by B.Y.SARAT
  15. algebra

    Last year, Susan had 30,000 to invest. She invested some of it in an account that paid 8% simple interest per year, and she invested the rest in an account that paid 7% simple interest per year. After one year, she received a total of $2150 in interest.

    asked by Hailey
  16. statistical quality control

    A new process is started, and the sum of the sample standard deviations for 25 subgroups of size 4 is 750. If the specifications are 700 +- 80, what is the process capability index? What I know: D2=2.059 USL = 780; LSL = 620; Tolerance = 160

    asked by Tera
  17. narayana junior college,physics

    a point charge q=-8.0nC is located at origin . find electric field vector at point x=1.2m,y=-1.6m

    asked by B.Y.SARAT
  18. Chemistry

    Answer the following questions based on 2NH3->N2+3H2+450Joules How much heat is released in the equation: 6NH3->3N2+9H2 What is the heat of the reaction: H2+1/3N2->2/3NH3

    asked by JR.
  19. science

    12. The specific heat of copper is 0.385 J/g • °C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of copper from 7°C to 29°C? (1 point)Q = 0.385 J/g • °C x (29°C – 7°C) Q = 0.75 g x 0.385

    asked by miki
  20. Physics

    A car is at velocity of 20 km/h. If the car traveled 120 km in 3 hours at constant acceleration, what is its final velocity?

    asked by Anonymous
  21. chemistry

    If you add 5.0 mL of 0.50 M HCl solution to 20.0 mL to Buffer C, what is the pH of the buffer? (where buffer C is 8.203 g sodium acetate with 100.0 mL of 1.0 M acetic acid)

    asked by Alex
  22. English

    Is there any irony in the short story The Whirligig Of Life? If so, what are some examples?

    asked by LeiLani
  23. statistics

    transportation officials reported that 8.25 out every 1000 airline passengers lost luggage during their travels last year.if we randomly select 400 airline passengers,what is the probability that 5 lost some luggage?

    asked by lela
  24. physics

    e AM and FM radio waves are transverse waves consisting of electric and magnetic disturbances traveling at a speed of 3.00 x 10 8 m/s. A station broadcasts an AM radio wave whose frequency is 1230 x 10 3 Hz. (1230 kHz on the dial) and an FM radio wave

    asked by rahul patel
  25. physics

    On a perfect fall day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward nor downward. The total weight of the balloon, including its load and the hot air in it, is 24000 N. Find the weight of the displaced air. I got the

    asked by Kristie
  26. statistical quality control

    A new process is started, and the sum of the sample standard deviations for 25 subgroups of size 4 is 750. If the specifications are 700 +- 80, what is the process capability index? What I know: D2=2.059 USL = 780; LSL = 620; Tolerance = 160

    asked by Tera
  27. math

    A rectangular garden, with length twice its width, is to be expanded so that each side is increased by 4 yards. a. Write expressions for the dimensions of the expanded garden. b. Write and simplify an expression to represent the area of the expanded

    asked by jayzatar
  28. Physics

    A rat and a cat is 35 m apart. When the rat started to run at 2 km/h (0.556 m/s), the cat started to chase him at 1 m/s2. Can the cat catch the rat in 10 seconds?

    asked by Anonymous
  29. chemistry

    Calculate the molar solubility of Cu(OH)2, Ksp = 2.2 × 10–20, in 0.91 M NH3. Don't forget to use the complexation reaction Cu2+ + 4 NH3 ⇌ Cu(NH3)42+, K = 5.0 × 1013. Round your answer to two significant figures and do NOT use scientific notation.

    asked by Debbie
  30. Physics

    A stone is thrown vertically upward at 15 m/s. Neglect friction due to the air. What is the stone's velocity after 2 seconds?

    asked by Nikhil
  31. statistics

    Lost Luggage in Airlines Transportation officials reported that 8.25 out of every 1000 airline passengers lost luggage during their travels last year. If we randomly select 400 airline passengers, what is the probability that 5 lost some luggage?

    asked by lela
  32. Applied physics

    two men are carrying a 12m uniform ladder on their shoulders. Man A is 1.0m from one end, and man B is 3.0m from the other end. If the beam has a mass of 200kg, determine the load supported by each man.

    asked by José
  33. Trig

    A ferris wheel at the fair has a radius of 60 feet. If it takes 24 seconds to make a full revolution, what is the linear speed for the passengers?

    asked by Emily
  34. physics

    A 200g tennis ball approaches a racket at 20m/s, is in contact with the racket for 0.008s, and the ball rebounds at 4m/s. Find the average force that the racket exerted on the ball.

    asked by sugin
  35. Chemistry

    How many moles of O are there in 32.4g N2O5, how many oxygen and nitrogen atoms are there in the 32.4g?

    asked by Mary
  36. Physics

    Three balls with masses of 4 g, 6 g, and 4 g,respectively, are connected by massless rods. The balls are located (in meter intervals).What is the x-coordinate of the center of mass? Answer in units of m

    asked by Amber
  37. Chemistry

    In a chemical analysis, 3.40g of silver nitrate in solution reacted with excess sodium chloride to produce 2.81g of precipitate. What is the percent yield? Please show work. Thanks

    asked by gambit
  38. Math

    Of the 300 tickets 240 were sold to sixth grade studentss What percent of the total number of tickets sold were sold sixth grade students

    asked by Leslie
  39. Geometry

    (1) Construct a regular hexagon 55mm across the flat. Within it inscribe the largest possible isoscelence triangle having it base 40mm long across the flat. (2) Construct a regular octagon within the following direct 45mm across the flat, 50mm across the

    asked by Christopher
  40. Chemistry(Please help, thank you)

    What is the [H3O+] for a neutral solution at 50 degrees celsius? I know that kw=[H3O+][OH-] but I am not sure what to do to get the H3O. The value I have for kw=5.76e-14 and I have the pH 6.62 but I do not know what the OH would be.

    asked by Hannah
  41. stats

    a student randomly guesses at five multiple-choice questions, each question has five possible choices (suppose the choice for each question is independent): a) Find the probability that the student gets exactly three correct. b) What is the probability

    asked by jeanette
  42. personal finance

    explain why a savings and loan association that pays a nominal rate of 4.5% interest, compounded daily, actually pays an effective rate of 4.6%.

    asked by cory
  43. Physics

    Light waves with two different wavelengths, 632 nm and 474 nm, pass simultaneously through a single slit whose width is 7.63 x 10-5 m and strike a screen 1.30 m from the slit. Two diffraction patterns are formed on the screen. What is the distance (in cm)

    asked by Jim
  44. Physics

    A particle of mass m kg is attached to one end A of a model spring OA of natural length L=0.81m and stiffness K N/m. The spring is hung vertically with the end O fixed and end A attached to the particle, which moves in a vertical line. The particle's mass,

    asked by Anonymous
  45. Physics

    A rat and a cat is 35 m apart. When the rat started to run at 2 km/h (0.556 m/s), the cat started to chase him at 1 m/s2. Can the cat catch the rat in 10 seconds? WHAT EQUATION DO I USE??????????

    asked by Anonymous
  46. Physics

    A rat and a cat is 35 m apart. When the rat started to run at 2 km/h (0.556 m/s), the cat started to chase him at 1 m/s2. Can the cat catch the rat in 10 seconds?

    asked by Anonymous
  47. physics

    Consider an airplane with a total wing surface of 90 m^2. At a certain speed the difference in air pressure below and above the wings is 4.2% of atmospheric pressure. Find the lift on the airplane.

    asked by christy
  48. physics

    The magnitude of vector A is 18 units at an angle of 90 degrees with the x-axis, and the magnitude of vector B is 12 units at an angle of 330 degrees with the x-axis. What vector C must be added to the vectors A and B so that the resultant of these three

    asked by Ro2ita
  49. physics

    A 40-kg sled rests at the top of a 34˚ incline that is 500 m long. If the coefficient of friction is 0.2, what will be the speed at the bottom of the slope? The 40-kg mass includes the mass of the person on the sled.

    asked by rahul patel
  50. Physics

    A hockey player shoots the puck which is initially at rest by applying a force of 72 N through a displacement of 1.6 m. The mass of the puck is 161 grams. a) Calculate the work done by the player on the puck. b) Calculate the resulting speed of the puck

    asked by Anonymous
  51. science

    A 600- newton diver dives off a 10 meter platform. If it takes 2 seconds to hit the water, what is the diver's power?

    asked by Porky
  52. Math help

    Fimd the market price and demand for the pair of supply and demand equAtions: supply: Q=88p+653 Demand: q=1903- 37 p

    asked by Janine
  53. Algebra!!

    1.a swimming pool has a radius of 10 feet and a height of 4 feet. What is the volume? 2.What is the volume of a soup can with a radius of 4cm and a height of 16cm? 3.What is the volume of a triangular prism with a length of 10cm a width of 15cm and a

    asked by Renee
  54. Chemistry

    In a chemical analysis, 3.40g of silver nitrate in solution reacted with excess sodium chloride to produce 2.81g of precipitate. What is the percent yield? Please show work. Thanks

    asked by gambit
  55. chemistry

    Benzoic Acid (HC6H5OO, 122.0 g/mol) has a Ka = 6.3 x 10-5. What is the pH of a solution that has 3.050 g of benzoic acid in enough water to make a 0.250 L solution?

    asked by Anonymous
  56. Math

    the height, at a given time, of a child above the ground when the child is on the trampoline is shown in the table. determine a algebraic model for the data. Then use the model to predict when the child will reach a height of 3m Time height in metres 0 1m

    asked by Katie
  57. Algebra!!

    1)volume of a ctlinder: 198mm Radius base: ?? Height of cylinder: 7mm 2)Volume of a triangular prism:60 cu yd Length of base: ?? Height of base: 6m Height of prism: 2m

    asked by Renee
  58. Chemistry

    Calculate the partial pressure of monatomic hydrogen in hydrogen gas at 2000 K and 1 atm pressure. Given: (i) For ½ H2 ï‚® H, Ho298=217,990 J; So298=49.35 J/K. (ii) Assume that the heat capacity of monatomic gas to be 3/2R (iii)The heat

    asked by Plizzz help me
  59. geometry

    Draw a regular pentagon on a base AB 35mm long, within it inscribe the largest equilateral triangle.

    asked by Christopher
  60. Computer Class: History research

    What made Sir Francis Drake a famous explorer?

    asked by Losa
  61. chemistry

    Got my as chemistry practical next week on OCR. Really stuck on it, don't know how to work out how the expected volume of CO2 is greater than that is obtained. Looked at the mark scheme ocr chemistry evalutative task specimen , but its not much help as it

    asked by anonymous
  62. Physics

    Part of a single rectangular loop of wire with dimensions .35 m by .75 m (.35 is the height and .75 is the length) is situated inside a region of uniform magnetic field of 0.395 T. The total resistance of the loop is 0.690 Ω. Calculate the force required

    asked by Nadine
  63. physics

    4 Consider an airplane with a total wing surface of 90 m^2. At a certain speed the difference in air pressure below and above the wings is 4.2% of atmospheric pressure. Find the lift on the airplane.

    asked by Jim
  64. CHEMISTRY

    calculate the ionization constant of the conjugate base for a solution made from 0.2Molar HC2H3O2 and 0.5Molar C2H3O2.The ionization constant for the acid (HC2H3O2) IS 1.8 Multiplied by 10^(-5)

    asked by laze
  65. geometry

    If two medians of a triangle are equal, prove that the triangle formed by a segment of each median and the third side is an isosceles triangle.

    asked by Nuwaya
  66. maths

    Find the sum of the smallest 2 digit prime number and the largest 2 digit prime number.

    asked by ssssss
  67. Economics(Please help)

    Given the wage in dollar per day and the CPI for years 1 and 2 how do you calculate the nominal % increase in wage and the real % increase in wage? I am not sure what to do for this or what the formula is if any. Thank you for your help.

    asked by Hannah
  68. Physics

    Part of a single rectangular loop of wire with dimensions .35 m by .75 m (.35 is the height and .75 is the length) is situated inside a region of uniform magnetic field of 0.395 T. The total resistance of the loop is 0.690 Ω. Calculate the force required

    asked by Charlie
  69. bookkeeping

    Fuses on 2/1/20 i purchased 5000@1.20 on 5/6/20 i purchased 2500@1.24 on 9/18/20 i purchased 1000@1.33 i have 2481 on hand what is the ending inventory value for fuses using FIFO? A)$2,977.20 B)$3,044.33 C)$3166.44 D)$3299.73 my answer is c please help

    asked by susue
  70. physics

    A flux density of 1.2testa is produced in piece of castle by a magnetic force 1250a/m. Find the relative permability of the steel under these conditions. B. Determine the magnetic flux strenght and magnetic force required to produce a flux density of

    asked by Isaiah. c
  71. Algebra

    What are the similarities and differences in finding the volumes of a rectangular prism, a triangular prism, and a cylinder?

    asked by Jessie
  72. thermodynamics

    A volume of gas V at temperature T1 and pressure P is enclosed in a sphere. If is connected to another sphere of volume V/2 by a tube and stop cork. This second sphere was initially evacuated and the stop cork is closed. If the stop cork is now opened and

    asked by frank fred
  73. English

    I urgently need you to help me,write five sentences about why you think knowledge of English language registers will be important in accounting and finance.

    asked by Siarah
  74. math help please

    A drainage system for a 40 acre field is designed to remove 3/8 inch of standing water from the entire field in 24 hours. What flow rate (gpm) must the drainage system achieve to meet the design specification?

    asked by Nabil
  75. physics

    Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80

    asked by C
  76. math

    if a 1100 lb motorcycle(w/2 passengers)is doing 40mph,how long will take to come to a complete stop?

    asked by dean
  77. chemistry

    calculate the ionisation constant of the conjugate base of a solution made from 0.20M HC2H3O2 AND 0.50M C2H302.

    asked by laze
  78. finance

    Weighted Average Cost of Capital)As a member of the Finance Department of Ranch Manufacturing, your supervisor has asked you to compute the appropriate discount rate to use when evaluating the purchase of new packaging equipment for the plant. Under the

    asked by Mike
  79. physics

    A hockey player shoots the puck which is initially at rest by applying a force of 72 N through a displacement of 1.6 m. The mass of the puck is 161 grams.

    asked by Anonymous
  80. Economics

    I've been doing research all day but I can't find out anything about this: Why is the number of people on welfare in Canada higher than the number of people on welfare in the US?

    asked by Labz
  81. english

    Hi, we're reading the bible (old testament) in my class and we have to write a research paper about a topic that relates to a topic in any of the readings. Do you have any ideas what I could possibly write about? I was thinking the significance of numbers

    asked by jon
  82. Physics

    A 6 kg block moves at 5 m/s to the right while a 9.5 kg block moves at 8 m/s to the right. Find the total kinetic energy of the two-block system. Answer in units of J

    asked by Amber
  83. Applied physics

    a string is wrapped around a cylinder with radius of 20cm. If the force of 300N is applied to the string, what is the magnitude of the torque that is developed about the axis?

    asked by jose souljoe
  84. Math

    Find the equation of the tangent to the graph at the indicated point. f(x) = x^2 − 1; a = 3 and f(x) = x^2 − 8x; a = −9 whats the difference between 1 and 8x. What formula do I use and how should i solve both of these problems? Thank you

    asked by Nick
  85. science

    you are riding your bike at 9km/h. ten minutes later; your speed is 6km/hr.

    asked by Britt
  86. physics

    What would be the final temperature of a mixture of 50 g of 15 degrees C water and 50 g of 40 degrees C water?

    asked by Jim
  87. English

    I can't send you my post. I hope this time I can. 1) Rewrite the following sentences using wish (I think I need to express this better). 2) She is not here with me. (I wish she were here with me) I couldn't talk to her. (I wish I could have talked to her).

    asked by Matthew
  88. Math

    Zaidi drove 9.8 kilometers on Monday and 7.39 kilometers on Tuesday. What is the total number of kilometers she drove.

    asked by Tye
  89. Math

    Find the Dimensions of a rectangular garden of the greatest area that can be enclosed in 40 feet of fencing.

    asked by John
  90. math

    A lawn sprinkler covers a rectangular pattern of 20ft x 30ft. 1)If the flow rate of the sprinkler is 2.5 gpm, derive a formula for calculating the time (hours) to apply D inches of water over one 20ft x 30ft area. 2)What are the units on the constant?

    asked by Anil
  91. math - please help

    What is the rotational speed (rpm) of the 64 in diameter rear tires of a tractor traveling at 6.5 mph if there is no slippage? How do I work this? Thank you.

    asked by Nilan
  92. maths

    Express 252 as a product of its prime fators.

    asked by srihita
  93. algebra

    a large drainage pipe has a radius of 8 feet and a height of 12 feet. What is the volume?

    asked by Renee
  94. geometry

    not sure if youll understand but ill try and explain the picture is a trapezoid i believe b1 is 7cm, and do not have the height but the numbers on the long side is 8cm and the side of b2 is 4cm this part of the pic looks like a right triangle am not able

    asked by kevin
  95. Art and Writing

    I'm looking for a job that you write a story, poem, etc. and create an art work for a magazine and you get paid. FOR TEENS AND YOUNG ADULTS ONLY!!! BTW - My sister is in high school and she is looking for that kind of job.

    asked by Laruen
  96. Chemistry

    I am having trouble answering this. please help! Q: Cereol is a newly discovered compound in corn flakes. A biologist suspects that it increases mental ability. She is making a solution to test on rats. First she makes a stock solution. She discovers that

    asked by Maddy
  97. physics

    the mass of the boy is 70kg. calculate the force in newtons acting on the boy due to his deceleration. how do i work this out

    asked by evie
  98. NARAYANA JUNIOR COLLEGE .PHYSICS

    2 PARTICLES [FREE TO MOVE] WITH CHARGES +q and +4q are a distance L APART. A 3RD CHARGE IS PLACED SO THAT THE ENTIRE SYSTEM IS IN EQ2UILIBRIUM.FIND THE LOCATION,MAGNITUDE AND SIGN OF THE 3RD CHARGE

    asked by B.Y.SARAT
  99. physics

    A spacecraft circling the moon at a distance of 384,000 km from the earth communicates by radio with a person on earth. How much time elapses between the sending and receiving of a signal?

    asked by rahul patel
  100. English

    Thank you very much, Writeacher. Can you also suggest to me short reading comprehension (to be done in 15 minutes) with a set of comprehension questions at the end (intermediate level) ? Can you check if my sentences to turn into indirect speech are

    asked by Matthew
  101. Intermediate Algebra

    sqrt(-24)

    asked by sherry
  102. English

    Please Check, Thank You! When choosing your search strategy for a search engine, it's best to A. Combine keywords into phrases by using quotation marks B. Enter the least important word first C. use verbs, articles, and capitals D. Ignore alternate

    asked by Kourtney
  103. English

    Writeacher, thank you very much for giving me advice. Can you please tell me if my sentences are possible? 1) "What about making pizza for dinner”,he said. He suggested making pizza for dinner. 2) “OK. It was me who broke the vase”, she said. She

    asked by Matthew
  104. physics

    You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound

    asked by sara
  105. Chemistry please help

    How would an HA acid behave in water if it were a strong acid, weak acid, and non-electrolyte?

    asked by Robert
  106. Math

    Wallace made 14 1/2 cups of soup He used 2/3 cup of water in each cup of soup How much water did Wallace put in the soup

    asked by Leslie
  107. science fair

    Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and

    asked by samantha
  108. Customer Relation

    I know what a internal customer is, but what are some ways you can resolve conflict with a internal customer.

    asked by Bryan
  109. Geometry

    Need help please: (3,0) (7,6) (x-7)2 + (y-6)2 = 7(2) (x-7)2 + (y-6)2 = 49 Having difficulty with this problem.Can someone help? geometry - Reiny, Saturday, March 31, 2012 at 8:07am You don't say what the actual problem is. I see the resemblance to finding

    asked by Kel
  110. Geometry

    Need help please: (3,0) (7,6) (x-7)2 + (y-6)2 = 7(2) (x-7)2 + (y-6)2 = 49 Having difficulty with this problem.Can someone help? geometry - Reiny, Saturday, March 31, 2012 at 8:07am You don't say what the actual problem is. I see the resemblance to finding

    asked by Kel
  111. math

    A dozer is traveling at 5 miles per hour. How many seconds will it take to travel 160 feet? I have to solve this by the dimensional analysis method.

    asked by Lyndsey
  112. thermodynamics

    how many molecules of air are there in 1 litre flask at 293K, if the preessure in it is 0.3 atm.

    asked by frank fred
  113. math problem

    please help Factor completely 144b^2+648bg+729g^2

    asked by Lavern
  114. Cal

    The area of a circular sinkhole increases at a rate of 420 square yards per day. How fast is the radius of the sinkhole growing when its radius is 50 yards?

    asked by Lisa
  115. physics

    A charge of 0.08 C is moved from position where the voltage is 0v, to position where voltage is 0.25 v. What is change in electrical potential energy associated with change in position

    asked by savir
  116. math situation

    please help multiply (-4n)square 2(2n square 2)square 2

    asked by Sandra M
  117. PLEASE HELP!!!

    Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and

    asked by samantha
  118. introduction to law of torts

    What would be considered an attractive nuisance in the law of torts? a) A pretty girl at the mall. b) A pool without a fence. c) A toxic waste dump. d) a and c. e) None of the above. b?

    asked by shelly
  119. sociology

    People who choose to remain childfree are often stigmatized by society. Why are they stigmatized by society. what are the cultural and structural factors.

    asked by Anonymous
  120. Math Problem

    Please help add and simplify if possible 5u/(u^2-16)+u/(u-4)

    asked by Lavern
  121. physics

    Luke is trying to catch a pesky animal that keeps eating vegetables from his garden. He is building a trap and needs to use a spring to close the door to his trap. He has a spring in his garage and he wants to determine the spring constant of the spring.

    asked by Riya
  122. English

    i need help putting this para into easier words plz Soldiers and military personnel are too often glorified and widely regarded as heroes, which promotes the idea of war within society. However, its harsh realities are left largely ignored, and many are

    asked by Navroz
  123. Algebra

    Volume of a triangular prism:1000 cu ft Length of base: ?? Height of base: 2ft Height of prism:40ft

    asked by Jessie
  124. Logic

    What is the truth value of the sentence "P v ~ P"?

    asked by Anonymous
  125. english

    Question. For many years you have heard exciting and humorous tales about an elderly aunt/uncle in your family.Someone gives you a diary that once belonged to this relative, who is now dead.write TWO diary entries, each describing a memorable moment in

    asked by parveen
  126. american histoy

    _______ pioneered the field of corporate public relations.

    asked by traneshia smith
  127. physics

    A block is pulled across the floor by a pull of 400 N at an angle of 35˚ with the horizontal. The force of the kinetic friction is 150 N, and the block is moved a horizontal distance of 23 m. What is the resultant work?

    asked by rahul patel
  128. physics

    a net horizontal force of 7000N is applied to a car which is at rest.the weight of the car is 90000N. what will be the speed of the car after 10 second?

    asked by sugin
  129. social studeis

    i need to write a ancient explorer fictional historical narrative but don't know which person to pick please help me

    asked by help please !!!!!!!!!!!!!!!!!!!!
  130. English

    I left out the following sentences on the third conditional. 4) She was angry with me. I didn't tell her the truth.

    asked by Matthew
  131. chemistry

    make 98.5 mL of 1.25 M barium nitrate from a 4.50 M solution. i do not know what to do with this information

    asked by kear bear
  132. Math

    What is the domain of f(x) = √(x^2-2x-8) Thanks!

    asked by Sandy
  133. Math situations

    please help me solve Use the quadric formula to solve 2x^2-3x=-6

    asked by Sandra M
  134. math situattion

    please help factor completely 4r^2+9-12r

    asked by Sandra M
  135. math situation

    please help Divide 35b^3+18b^2+37b+45)/(5b+4)

    asked by Sandra M
  136. Chemistry Help Please

    i do not understand how to solve this problem, please help 10.0mL 0.5M sulfuric acid can neutralize what volume of 0.5M ammonium hydroxide?

    asked by Robert
  137. Math Problem

    Please help add and simplify if possible 5u/(u^2-16)+u/(u-4)

    asked by Lavern
  138. math problem

    Please help I'm clueless factory completely 64c^2-121

    asked by Lavern
  139. Anthro

    hello i have a question are macaques human kind ? what exactly is human kind?

    asked by Juanitta
  140. Algebra 2

    (3x^3+4x^2-7x+6) / (x-3) quotient and remainder

    asked by Nancy
  141. Math problem

    please help state the value of the discriminant 5x^2-9x-16=0

    asked by Lavern
  142. math problem

    please help Factor 36-15t+t^2

    asked by Lavern
  143. Global History

    Sorry this is not very detailed...I checked my textbook but couldn't find any information. How did the Islamic Conquest impact India? Thanks so much in advance :)

    asked by Angel
  144. calculus

    if the solutions of f(x)=0 are -1 and 2, then the solutions of f(x/2) = 0 are

    asked by anon
  145. ms. sue

    How did you know it was me?

    asked by lily
  146. Math

    If f(x)= x^2 + 2x What is f(-x) What is f(1/a) Thanks!

    asked by Fred
  147. math problem

    please help Multiply and simplify answer (v+f)(v^2-vf+f^2)

    asked by Lavern
  148. math

    when is it more practical to use a scale drawing rather than an actual size drawing

    asked by kell