Questions Asked on
October 31, 2013

  1. Chemistry

    Individuals living near copper mines sometimes earn extra money by suspending iron objects in the mine wastewater. Based on your experimentation, explain why the iron objects would be suspended in the wastewater.

    asked by Anonymous
  2. physicsh

    Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of 3.9 103 m/s. The net force accelerating the projectile is 4.8

    asked by butcha
  3. 8th grade chemistry

    which of the following molecules does not contain 5 atoms? A. CaCO3 B. Mg(OH)2 C. NaHCO3 D. Fe2O3

    asked by Anonymous
  4. physics

    Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of3.9 103 m/s. The net force accelerating the projectile is 4.8 105

    asked by Anonymous
  5. Biochemistry

    a closed circular DNA molecule has 3675 base pairs and a topological linking number (Lk) of 345. Using 10.5 base pairs per turn, what would the writhe number (Wr)be for the molecule in order for it to optimize its base pairing?? I'm guessing we use the

    asked by Anonymous
  6. algebra

    3x-4z=2w

    asked by Anonymous
  7. Math

    Together , Tom and max have 72 football cards. Tom has 2 more than 4 times as many cards as max has. How many football cards does Tom have ?

    asked by Mo
  8. Chemistry

    An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1? 2 ev 4 ev 8 ev 12 ev What is the best

    asked by bigurl1.4
  9. biology

    if DNA replication were conservative, what sort of bands would you expect from the CsCl density gradient centrifugation?

    asked by Anonymous
  10. Math

    Javier rode his bike for a total of 41 minutes. Before lunch, he rode for 1 minute less than 5 times the number of minutes he rode after lunch. How many minutes did Javier ride before lunch?

    asked by Mo
  11. Calculus

    How do I find the radius of convergence of a series where n=1 to infinity of (14^(n)x^(n)n!)? I have tried using the ratio test but I eventually get to this step: lim as n approaches infinity of absolute value of (14x(n+1)), which equal infinity. How am I

    asked by Win
  12. Pre-Calculus

    Let f(x) = [(√x)-7]/[(√x)+7]. What is f'(x)? What is the easiest way to find the derivative of this? Should I remove all the radicals and use quotient rule, like f'(x)= ((x^0.5) + 7)(0.5x^-0.5) - ((x^0.5)-7)(0.5x^-0.5) / ((x^0.5) + 7)^2 Is this right?

    asked by Ann
  13. Calculus

    What is the radius of convergence of the power series (((2n)!x^(n))/((2n-1)!)), and what is its interval of convergence? I used the ratio test and found that the radius of convergence is 0, as it is impossible for the absolute value of infinity to be less

    asked by Win
  14. Substution Soluton MATH

    1. y= -5x+2 y=3x-14 2. x+y=0 5x+y=4 3. 6x+2y=4 4x+2=8

    asked by andra
  15. science

    The two tables below give the relative-risk of developing a stroke, in relation to blood pressure and body mass index. The data are based on a population of men from the USA. The values in the first table are given in comparison with the total population.

    asked by sam ????????????????????
  16. Physics

    At t=0, a particle leaves the origin with a velocity 6m/s in the positive x direction and moves in the x-y plane with a constant acceleration (-2i-4j)m/s2 How far the particle from the origin at t=1 ?

    asked by Maryam
  17. Science

    Is a cucumber a fruit or a vegetable?

    asked by Niko
  18. Trigonometry

    A calculator is broken so that the only keys that still work are the sin, cos, tan, cot, sin^-1, cos^-1, and tan^-1 buttons. The display initially shows 0. In this problem, we will prove that given any positive rational number q, show that pressing some

    asked by Sam
  19. Calculus

    How to integrate dx/(4-5 sin x) using t-substitution method(i.e. taking tan x/2=t)?

    asked by MS
  20. Science (urgent!)

    Three characteristics of friction force and surface type. Three characteristics of friction force and mass. Three characteristics of friction force and surface area. I don't quite understand what they mean by characteristics, or what they want me to do.

    asked by Marisol
  21. math

    1.62 is divible by which of the following numbers? A.1,3,31,62 B.1,2,3,31 C.1,4,16,62 D.1,2,31,62 I PICKED D. ------------------------------- 2.108 is divisible by which of the following sets of numbers? A.1,2,3,4,6,9,12,18,27,36,54,108 b.1,2,4,27,54,108

    asked by mat
  22. math

    A small wheel of radius r is situated at the top of a ramp having an angle θ = π/3 rad At t = 0 the wheel is at rest and then it starts to rotate clockwise in the positive x direction with constant angular velocity ω. Find the parametric

    asked by John
  23. physics

    A projectile launched straight upward at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45° above the horizontal plane. How fast is it moving at the top of its curved trajectory?

    asked by Jessica
  24. Pre-Calculus

    Prove that each equation is an identity. I tried to do the problems, but I am stuck. 1. cos^4 t-sin^4 t=1-2sin^2 t 2. 1/cos s= csc^2 s - csc s cot s 3. (cos x/ sec x -1)- (cos x/ tan^2x)=cot^2 x 4. sin^3 z cos^2 z= sin^3 z - sin^5 z

    asked by Anonymous
  25. chemstry

    How long will it take 200 mg of carbon-14 to decay to the point where only 75 mg remain if the half-life is 5770 years?

    asked by jordan
  26. Forensic Psychology

    Using multiple sources, defend your thesis on how and why therapeutic and forensic roles can or cannot be reconciled. Ensure that you argue for a particular side of the issue (not arguing both sides) and that your argument is well-supported by scholarly

    asked by debra
  27. math

    four apples and 2 ponkans cost 53.two apples and four ponkans cost 75.how much will half a dozen apples and half a dozen ponkans cost?

    asked by feneya
  28. chemistry

    All these are consequences of the sole valence electron in alkali metals exept............. the metals are soft Good conductors of electricity the silvery luster Good conductor of heat

    asked by miss cyndy
  29. math (please help)

    1. Write the equation for the horizontal line that contains point G(-8, 8). 2. What is an equation for the line that passes through points (-1, -4) and (1, 4)? Write the equation in slope-intersect form. 3. Write an equation for the vertical line that

    asked by kaitlyn
  30. Substituion MATH

    1) -x+10y=60 -4x+16y=32 2) -1/2x - 1/4y=3 1/3x+1/6y=2

    asked by andra
  31. math

    an architect has allocated a rectanguoar space of 324ft^2 for a square dinging room and a 12ft wide kitchen. find both width of the dining room and the length of the entire rectangular space.

    asked by pam
  32. math

    a triangular traffic island has a base half as long as its height. the island has an area of 121m^2. find the base and the height.

    asked by pam
  33. math

    north avenue is 36ft wide when it ends at main st. a 45 foot long diagonal crosswal allows pedestrians to cross main st to or from either corner of north ave. determine the width of main st.

    asked by pam
  34. math

    a 20-foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 16ft from the base of the building. how high up the wall does the ladder reach?

    asked by pam
  35. Math

    8. How many cubic feet are in 3 cubic yards? A. 27 cu. ft. B. 5,184 cu. ft. C. 9 cu. ft. D. 81 cu. ft. I picked D,because there are 27 cubic ft. in 1 yd. So you would take 27 cubic ft multiply by 3, which equals 81 cu. ft. Is that correct?

    asked by Cassie
  36. Biology

    What information does relative dating provide?

    asked by Kailee
  37. math

    Point A(8,-10) is reflected over the y-axis. Write the coordinate of A'. a) (-8,-10) b) (8,10) c) (8,-10) d) (-8,10)

    asked by victoria
  38. math

    The length of the hypotenuse of a right triangle is 13 m. The length of one leg is 5 cm. Find the length of the other leg. a) 14 cm b) 144 cm c) 8 cm d) 12 cm

    asked by victoria
  39. math

    Find the length of the hypotenuse of a right triangle with legs of 9 cm and 12 cm. a) 8 cm b) 21 cm c) 15 cm d) 225 cm

    asked by victoria
  40. statistics

    if n=30 and p=.23 what is P(20,x,23)= and P(x.23)= I think I need to find the z scores in order to solve but how do I read the table or do I even need it. UGH! so confusing especially 20 years later.

    asked by Amy
  41. Biology

    How are bryophytes similar to green algae? How are they different?

    asked by Kailee
  42. Math

    the average american drinks 29 more cokes per year than the average mexican. if together they consume 555 cokes per year how many cokes are consumed each year by the average american and how many by the average mexican? i also have to identify the

    asked by Jason
  43. Anthropology

    Tell me the thesis statement for the following: Gooding S.S. (May,1996),At the boundaries of religion identity Native American religions and American legal culture. Bialecki, J. (2008) Between stewardship and sacrifice; agency and economy in a Southern

    asked by Pernell
  44. Science

    After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? a. an earthquake or motion along a fault. b. new deposits of sediment must build up on the eroded area. c. folding of sedimentary

    asked by Anonymous
  45. chemstry

    How long will it take 200 mg of carbon-14 to decay to the point where only 75 mg remain if the half-life is 5770 years?

    asked by jordan
  46. Physics

    A copper wire of diameter 0.30mm and length 1.50m is joined to another steel wire of same diameter and length 1.20m. The copper part of the double wire is hung vertically to a fixed point, while a small weight is connected to the lower end of the steel

    asked by Cali
  47. organic chemistry

    Which proton gave rise to the peak that appears at 9.31 ppm on the 1H NMR?

    asked by Andi
  48. Physics

    A nurse pushes a cart by exerting a force on the handle at a downward angle 35 degrees below the horizontal. The loaded cart has a mass of 28.0 kg, and the force of friction is 60.0N. What force must the nurse exert to move at a constant velocity?

    asked by Patty
  49. math

    Point E is located at (-2,2) and point F is located at (4,-6).What is the distance between points E and F? a) square root of 52 b) square root of 28 c) 10 d) square root of 20

    asked by victoria
  50. Algebra

    Please help. This is my problem. Today the center City baseball team scored 10 runs . The day before yesterday they scored x. How many runs did they score in these two days.

    asked by Sydney santillan
  51. Statistics

    The coding department of a large physician clinic is interested in purchasing a software program that will edit claims before they are sent out to billing. The license fee for the software costs $34,000 per year. The software is expected to reduce the

    asked by Kitty
  52. Math

    Please check my answers, which are at the bottom of each question...:) remove brackets a) 4(a+3) d) 5(2+d) 4a+12 10+5d b) 3(2b+2) e) a(3a-6) 6b+2 4a-6a c) 7(3c-1) f) 2(x+y) 21c-7 2x+2y simplify the following: a) a+a+a+a d) a2 xa3 4a a5 b) a x a x a e)

    asked by Unknown
  53. biorganic

    equations of thereactions of both maleic acid and fumaric acid with (a) bromine (b) hydrogen chloride (c) catalytic hydrogenation.name the products of these reaction

    asked by debbie
  54. Finance

    If a firm just paid a dividend equal to $4.00 a share, then for the WACC, in order to find the cost of equity, $4 should be

    asked by Nikki
  55. Math...help

    remove the brackets and simplify questions a) 3(2a+5)+2(a+7) b) 5(b+4)+10b c) 4(2c+3)+3(c-3) d) 8+6(d-2) e) 6(5e+3)-4(2e+3) f) 5(3f+2)-(f-5) MY ANSWERS a)6a+15+2a+14 8a+29 b)5b+20+10b 15b+20 c)8c+12+3c-9 11c-3 d)8+6d-12 I need to simplify more...how?

    asked by Unknown
  56. english

    Need Help Please..!!! During the Victorian period, there were many social changes and intellectual developments. As a result, a crisis of faith rocked society. How does In Memoriam, A. H. H. by Alfred, Lord Tennyson reflect that crisis? a)Grieving, the

    asked by luke
  57. Math

    1.62 is divible by which of the following numbers? A.1,3,31,62 B.1,2,3,31 C.1,4,16,62 D.1,2,31,62 I PICKED D. ------------------------------- 2.108 is divisible by which of the following sets of numbers? A.1,2,3,4,6,9,12,18,27,36,54,108 b.1,2,4,27,54,108

    asked by Matt
  58. english

    12. which of the following describes the reactions of government leaders to the second traveler in lines 15 and 16 inhospitable friendly dismissive supportive

    asked by cali
  59. Thomas Nelson

    What is chromatin?

    asked by Brian
  60. Math/Infinity

    Explain why the union of two countably infinite sets with nothing in common is also countably infinite. I said that it was because the two sets are in one-to-one correspondence with each other. Is this right?

    asked by Jessica
  61. physics

    A car is traveling around a circular banked road without friction which is inclined at 72 degrees which has a vertical height of 25 meters. When the car is traveling at 16 m/s around the road, it is moving at the bottom on the incline (inner radius of the

    asked by jack
  62. English

    which of the following statements about american romantic poetry is not true? A)it followed a fixed rhyme scheme B)its themes originated in British literature C)it was influenced by Gothic literature D)it was filled with emotion

    asked by sam
  63. Math

    I would just like someone to check my work and make sure I am doing it correctly before I continue. f(x)=x^2-3x+5 1. f(2) I got f(2)=-7 and g(x)=5x-1 1.g(-3) I got g(-3)=-16 Thanks for any help!!

    asked by Kelly
  64. Physics

    A flowerpot falls from a window sill 28.6 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

    asked by Sam
  65. international relations

    I need help on writing a thesis statement on why this century will remain unpredictable I need it in either a realism liberalism contructism referring to international politic relations

    asked by Rochelle
  66. Science

    If you wanted to consult the geologic period for when the first vertebrates evolved, where would you look? a. in the section for the Ordovician period of the Paleozoic era. b. in the section for the Quaternary period of the Cenozoic era. c. in the section

    asked by Anonymous
  67. physics

    A TRAIN CAR OF MASS 4753 KG MOVING AT 8.0 M/S COLLIDES WITH TRAIN CAR OF 5000KG WHICH IS MOVING IN THE SAME DIRECTION 3.0 M/S WHAT IS THE VELOCITY

    asked by Anonymous
  68. Personal finance

    Investing in which of the following funds will give you the least diversification. A. Growth Funds B. Capital appreciation funds c. Equity income funds d. sector funds

    asked by Sheliah
  69. econ

    Market demand facing a monopolist is Qd=-5P+20. If the monopoly practices perfect price discrimination, what is the profit-maximizing level of output when MC=$2?

    asked by sara
  70. Algebra 2

    u sub 18 if u sub0= 2/3n+3/4 please help

    asked by Chandler
  71. Science

    When you inhale, where is there more oxygen, in the lungs or body.

    asked by Kelly
  72. Calculus-Applied Optimization Problem

    If a total of 1900 square centimeters of material is to be used to make a box with a square base and an open top, find the largest possible volume of such a box.

    asked by Ashley
  73. 3rd grade math

    sara wants to know how many boxes of cookies her entire girl scout troop sold. How could she use compatible numbers to find the sum? kate 52 boxes sara 43 boxes jen 18 boxes haliey 27 boxes

    asked by Reid
  74. socialstudies

    before I start I wanna say I don't known of this and don't have a book help ---------------------------------------------------------- 1.greece's economy prospered thanks to A.the arts B.philosophy C.trade D.architecture

    asked by truth
  75. Science question

    What would happen to the current model of the atom if new information about it’s structure is discovered in the future? Would it be revised, strengthened,proven or defended?

    asked by Gabby
  76. Science >.<

    if a wave is traveling at 60cm/second and has a wavelength of 15cm what is the frequency? Please explaine

    asked by Unknown
  77. Science

    Determine the frequency of a microwave 6.0 cm in length.( A microwave is an electromagnetic wave.It travels through space at a speed of 3.0 x 10 ^8 m/s)

    asked by Unknown
  78. Physics

    Calculate the tension in the two ropes if the person is motionless. Person weighs 76kg and 15 degree angle rope one and 10 degree angle rope 2

    asked by Susie
  79. ps 361

    there are 16 horses. 8 chickens are white. 7 horses run away. how many horses are left?

    asked by yasmine berger
  80. English

    He won first prize for the solar lamp in the science fair. (What is the meaning of 'for' in the sentence? Is 'for the solar lamp' an adjective phrase modifying 'prize' or and adverbial phrase modifying 'won'?)

    asked by rfvv
  81. Health

    Armando's coach is going to be late for soccer practice. As the team captain, it is Armando's responsibility to lead the teams for their warm-up activities. To prepare his team, Armando should direct his team to do which of the following? a. jog around the

    asked by Anonymous
  82. 1800s Inventions

    describe a modern-day invention that has replaced and/or advanced the 1800s invention and explain how it is more productive in today's society. 1. Cable cars 2. Telegraph 3. Telephone 4. Typewriter 5. Phonograph 6. Motion picture and projector 7. Lightbulb

    asked by Reina B.
  83. math

    Sam purchased a used car for $14,750. He put $2,000 down and financed the rest with a 48-month, 7.5% loan. What is his monthly car payment? Round your answer to the nearest cent.

    asked by anonymous
  84. Calculus-Applied Optimization Quiz Problem

    A rancher wants to fence in a rectangular area of 23000 square feet in a field and then divide the region in half with a fence down the middle parallel to one side. What is the smallest length of fencing that will be required to do this?

    asked by Riley
  85. geometry

    what is the value of the variable and bc if b is between a and c if AB=17, BC=3m, AC=32

    asked by Anonymous
  86. algebra

    A triangle has points A(2, 2), B(2, 4), and C(6, 3) and is reflected over the x-axis. A'B'C' are the coordinates of the reflected image. What is the B' coordinate

    asked by shannon
  87. Pre-Calculus

    I don't understand,please be clear! Prove that each equation is an identity. I tried to do the problems, but I am stuck. 1. cos^4 t-sin^4 t=1-2sin^2 t 2. 1/cos s= csc^2 s - csc s cot s 3. (cos x/ sec x -1)- (cos x/ tan^2x)=cot^2 x 4. sin^3 z cos^2 z= sin^3

    asked by Anonymous
  88. English

    What year and date was st Martina born?

    asked by Nikki
  89. Science

    Which of the following is a disadvantage of external fertilization. a) gametes are released into the surroundings b) gametes are washed away c) the developing zygote is protected d) large number of eggs can be produced at one time

    asked by Steve
  90. English

    Do you know of 2 facts of st Sebastian ?

    asked by Nikki
  91. math

    Sam opened a money-market account that pays 2% simple interest. He started the account with $7,000 and made no further deposits. When he closed the account, he had earned $560 in interest. How long did he keep his account open?

    asked by Lexi
  92. Finane

    The possibility that the fed may raise the discount rate is an example of A. Political Risk B. Exchange rate risk c. interest rate risk d. liquid risk

    asked by Michelle
  93. Geometry

    A ladder 12 m in length rests against a wall. The foot of the ladder is 3 m from the wall. What is the measure of the angle the ladder forms with the floor?

    asked by Hannah
  94. English

    In Edward Spenser'r The Faerie Queene, how should we interpret the crowded and slightly comical scene at the beginning of Book 1?

    asked by Christopher
  95. math

    Group 1 Group 2 Group 3 1/3 / 9 12 / 1/6 5/6 / 1/2 1/6 / 12 5 / 2/3 3/4 / 3/4 3/5 / 6 3 / 2/5 9/5 / 1/2 Group 4 5 / 1 1/2 1/2 / 3 2/3 3 1/3 / 2/3 1 Describe what the problems in each group have in common.

    asked by anonymous
  96. US History Mrs. Sue

    Select the group that best embraced the beliefs of Abraham Lincoln. Abolitionists or The Free Soil Party. Is it Abolitionists.

    asked by Tony
  97. algebra 2

    the 2 unequalities -26

    asked by hannah
  98. algebra

    This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

    asked by hannah
  99. Calculus-Applied Optimization Problem

    The manager of a large apartment complex knows from experience that 100 units will be occupied if the rent is 425 dollars per month. A market survey suggests that, on average, one additional unit will remain vacant for each 9 dollar increase in rent.

    asked by Liz
  100. Everest

    The Greek philosopher Socrates cautioned, "The unexamined life is not worth living." (Points : 4) True False

    asked by Kasha
  101. Finance

    Wanda Clark expects interest rate to decline in the next few months. To maximize her earnings, she should put her savings in a A. 2-year cd B. 6-month cd c. money market d. passbook savings account

    asked by Dahlia
  102. ut

    The acidity constant of acetic acid is 1.8 × 10-5. Calculate the % error of the measured Ka value.

    asked by Anonymous
  103. Algebra (factoring Polynomials)

    9w-w^3 2a^2+1+3a

    asked by Tracy
  104. Math

    A model rocket is launched with an initial velocity of 212ft/sec. It's height h, in feet, after t seconds is given by the formula h=212t-16t^2. After how many seconds will the rocket first reach a height of 592ft?

    asked by Pam
  105. math 5th grade

    Jill has 5 pictures to hang on her wall she wants to hang one picture in the center if the picture remains the same how many diffrent ways can she hang the other pictures

    asked by jasmyne ayala
  106. Math

    An architect has allocated a rectangular space of 325ft^2 for a square dining room and a 12 ft wide kitchen. Find both the width of the square dining room and the length of the entire rectangular space.

    asked by Pam
  107. Algebra 1

    Can someone help me I really don't get this one The table shows the number of trolley buses in operation in the United States during certain years. Describe the rates of change in the number of buses during the time period. (Table) Year 1980 1985 1990 1995

    asked by KATIE
  108. Finance

    which of the following is true with regards to rising interest rates? A. Use Long-term loans to take advantage of current low rates. B. The term of the loan option is not impacted by rising interest rates. c. Use Short-term to take advantage of low interst

    asked by Michelle
  109. business law

    Adam Chandler, star pitcher for the Olney Jayhawks, was warming up in the bull pitches to a catcher, during game 3 of the World Series where they were facing their hated rivals the Texas Loudmouths. Throughout this warm-up, the Texas fans were being very

    asked by tara
  110. Medical Billing & Coding

    You've started your first day at Venture Outpatient Surgery Center. Code the Following operative report: Operative Report PREOPERATION DIAGNOSIS: Left flank soft tissue mass POSTOPERATIVE DIAGNOSIS: Left flank soft tissue mass SURGEON: John Doe, DO

    asked by Arlene
  111. Medical Billing & Coding

    The ICD-PCS system uses a tool coders have never used before. What is it? a. Incisional biopsy b. excisional biopsy

    asked by Arlene
  112. Math HELP URGENT!

    Find the LCD of the ration expressions: A) [9x/(x^2-z^2)] [3/(x^2-2xz+z^2)] B) [x/(x^2-64)] [2/(40-5x)] [7/x]

    asked by Uri
  113. Algebra

    I need to know how to factor these in A-C method form 2a^2+1+3a 9w-w^3

    asked by Tracy
  114. Math

    Rearrange equation to isolate for P to use in a calculator please v=e[(1/cos(pi/2sqrt(P/Pcr)))-1] OR e[(sec(pi/2sqrt(P/Pcr)-1]

    asked by Jane