Questions Asked on
September 26, 2015

  1. Algebra

    Use method II to simplify the following complex rational expression. 5-13/x-2 divided by 6/x-2-7. I'm not sure if this is the proper set up, but it's suppose to be a division on top and bottom. Please if someone could help

    asked by Pam
  2. physics

    Perform error analysis on the following formulas: (a)∆ = áô, with errors á on and ô (b)r = 1/C, with an error on C (c)r = 1/n, with an error on n (d)k = Cd/åA , with errors on C, d and A

    asked by nonee
  3. Sociology

    What is an alternative theory to the Sapir-Whorf Hypothesis?

    asked by Rayhan
  4. psychology

    A study was conducted in which the teachers were asked to rate students for a particular trait on a ten point scale. With the help of data given below find out whether significant difference exists in the rating of the students by the teachers.Teachers

    asked by Suresh
  5. biology

    In evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following provides the most convincing support for this hypothesis? a. there are more types of RNA than there are of DNA b. RNA can both store genetic information and act

    asked by Time
  6. biology

    Which of the following is the key factor driving cellular differentiation in the body? a. chemical gradients in the cellular environment b. expression of genetic coding c. rate of transcription d. cellular nutritional status c?

    asked by Time
  7. CBU

    How to calculate moles in a sample

    asked by Patrick
  8. Calculus

    Just got through with derivatives, power rule, and chain rule. I am supposed to find the first and second derivatives of the function. y = 4x/√x+1 and y = cos^2(x) y' = [(x+1)^(1/2)(4)]-[(4x)(1/2(x+1)^(-1/2))(1)] y' =

    asked by Justin
  9. Chemistry

    I was doing a lab experiment: 1) I measured 2.02g of copper(II) sulphate pentahydrate 2) I dissolved the copper(II) sulphate pentahydrate in 10mL of distilled water 3) I added 2.0mL of concentrated HCl to the solution and mixed well 4) I added 0.25g on

    asked by Patrick
  10. Organic Chemistry

    During the synthesis of a Grignard reagent in diethyl ether solvent, what is the identity of the bubbles that show up on the surface of the magnesium? -Gaseous magnesium byproducts -Gaseous O2 -Gaseous H2 -Gaseous diethyl ether

    asked by Ash
  11. physics

    Consider a carwith front cross-sectional area of A=(1.77 ± 0.02)m^2 and a drag coefficient of C=(0.38±-0.02) moving with a speed of v=(10.0±0.5)m/s. Suppose that the density of air is p=1.20 kg/m^3 at the sea level. 1.Calculate the force F=(1/2)CApv^2

    asked by NONEE
  12. Chemistry

    I was doing a lab experiment on the reaction of copper(II) sulphate and aluminum: 1) I measured 2.02g of copper(II) sulphate pentahydrate 2) I dissolved the copper(II) sulphate pentahydrate in 10mL of distilled water 3) I added 2.0mL of concentrated HCl to

    asked by Patrick
  13. Arithmetic

    During a sale, CD'S that normally cost $6.98 each were priced at 2 for $12.50.Pete bought 4 CD'S at the sale price. How much money did he save by buying the 4 CDS on sale?

    asked by Anonymous
  14. Arithmetic

    A student must walk 2 miles to get to school. If she walks at an average of 3 miles per hour, how many minutes should it take her to walk to school?

    asked by Anonymous
  15. math

    x(2 +1000)

    asked by subash singh
  16. math

    If someone paid $59.00 on their taxable income with a state income tax rate of 6%, determine the amount of their taxable income.

    asked by Marie
  17. Maths area

    Mr dodson wants to fence an area that is 8 feet by 10 feet how muchfence will he need

    asked by Ali
  18. life orientation

    Campaign with responsibility interview questions

    asked by mahlatse
  19. vjs jagdalpur

    A positively charged particle projected towards west is deflected towards north by a magnetic field. State the direction of magnetic field. Which rule did you use to find direction?

    asked by shivangi
  20. University physics

    Hi. Can someone please help me on how to perform error analysis on the formulas: r = 1/C, with an error on C.

    asked by NONEE
  21. vjs jagdalpur

    A positively charged particle projected towards west is deflected towards north by a magnetic field. state the direction of magnetic field. Which rule did you use to find direction?

    asked by shivangi
  22. Physics

    A sound wave travels a distance 1020 m in 5 minutes. If the length of the three successive crests is 15 m, then calculate the wave speed. "Length of three crests"? I'm not sure about that. Is the question okay? I'm confused. :/

    asked by Kip
  23. math

    sofia is 3 years older than Eunice. In 5 years , Sofia will be twice as old as Eunice will then be. Find their present ages.

    asked by eunice
  24. PHYSICS

    1.)what is the magnitude of the force experienced by a proton moving at 3 km/s inside magnetic field of strength 0.05T 2.)an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the

    asked by Slow
  25. PHYSICS

    1.)what is the magnitude of the force experienced by a proton moving at 3 km/s inside magnetic field of strength 0.05T 2.)an electron is moving at 2x10^5 m/s through a uniform magnetic field of 1.4x10^-3 T.what is the magnitude of magnetic force if the

    asked by Anonymous
  26. French

    G Au restaurant. Partie A. Une dame commande un repas dans un restaurant. Avant d'écouter la conversation, répondez aux questions suivantes. 1.Qu'est-ce que le serveur va dire à la dame la première fois qu'il va lui parler? 2.Quels sont trois légumes

    asked by viv
  27. Math

    Find the missing coordinate of p, using the fact that p lies on the unit circle in the given quadrant. P( ), -3/7

    asked by Tracy
  28. Arithmetic

    Two sailors traveled by bus from one point to another. The trip took 15 hours, and they left their point of origin at 8am. What time did they arrive at their destination?

    asked by Anonymous
  29. math

    A team won 8 of the 24 games it played in one season. What percentage of the games did it win?

    asked by Anonymous
  30. social studies

    how did You Chong, a Chinese bookkeeper for a grocer on Maunakea near Hotel St., contract plague ? please answer with your source(s) and maybe cite it please ? thank you very much tutors.

    asked by anon
  31. Arithmetic

    A shopper bought 4 pillow cases that cost $4.98 a piece, 2 fitted sheets that cost $8.29 a piece, and 2 flat sheets that cost $8.09 a piece. What was her total bill?

    asked by Anonymous
  32. physic

    The position function x(t) of a particle moving along an x axis is x = 6.00 - 8.00t2, with x in meters and t in seconds. (a) At what time and (b) where does the particle (momentarily) stop? At what (c) negative time and (d) positive time does the particle

    asked by sara
  33. english (not homework)

    can i have a kid definition of contagion ? or maybe a simplified definition ? thank you, i can search it up, but i want to have definitions from other people too. thank you for sparing your time.

    asked by anon
  34. analytic geometry

    for all parabolas, show that the angle between the line segment joining endpoints of the latus rectum to the vertex is 2 arctan 2

    asked by judith
  35. Test

    How do you hurry up on taking a test?

    asked by Micahdonna
  36. dav

    Find molarity of alcl3 if normality is 0.2

    asked by tmna
  37. statistic

    a class handled by prof. W has 60 students.he wants only 10 students to join in the Quiz bee.Suppose he consider the gender of the student, wherein 5 students are male and the remaining 5 are female.what sampling technique must he employ?in what manner he

    asked by judith
  38. Math

    Assume that all chickens have 4904 feathers. If it takes you 1.9 seconds to pluck 69.8 feathers, how many hours would it take you to defeather 5157 chickens?Answer in units of hours.

    asked by G
  39. math conversions

    If a 68.1 g sample of food will produce 12200 food calories when it is metabolized, how many scientific calories are produced per gram of food?

    asked by G
  40. english

    Which word in the sentence is the predicate nominative? Next Monday should be a federal holiday. A. federal B. Monday C. next D. holiday

    asked by mike
  41. math

    Mike has 16 3/4 pounds of hamburger. How many 1/4 pound of burgers can he make.

    asked by annonymous
  42. chemistry

    The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?

    asked by Anonymous
  43. chemistry

    The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?

    asked by Anonymous
  44. Science

    True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of

    asked by Julia
  45. Finance

    DBP Inc. just paid a dividend of $2.50. The expected growth rate of dividend is 5 percent. The required return for investors in the first three years is 12 percent and 10 percent for the following three years. After those six years the required return is 8

    asked by Jack
  46. English

    Identify three adjectives in the sentence below. "When I cut my right hand on the broken glass, I searched high and low for some pain-killing medicine." a. right, glass, some b. right, broken, pain-killing c. my, right, hand Is the answer b?

    asked by SkatingDJ
  47. St Teresas College

    What would be the difference between seawater and pure water in terms of osmotic pressure and vapour pressure?

    asked by Anonymous
  48. math

    How do you multiply 16 3/4

    asked by annonymous
  49. Math

    If Sally has $48 in her wallet and she spends $16 on a shirt. What fraction of the money did she spend on the shirt?

    asked by annonymous
  50. MATH

    Do you convert 16 3/4 to find out how many 1/4 pounds of hamburger you can make out of that?

    asked by annonymous
  51. CHEMISTRY !!! HELP !

    Calculate the pH of the solution after the addition of the following amounts of 0.0617 M HNO3 to a 70.0 mL solution of 0.0750 M aziridine. The pKa of aziridinium is 8.04. 1)Volume of HNO3 equal to the equivalence point 2)89.5mL of HNO3 I got pH= 7.37 for 1

    asked by Owen
  52. Criminal Justice/White Collar Crime

    Bounty hunters in the medical fraud area are: 1 A. people who use strong-arm tactics to collect bills that are not owed. B. doctors who receive a fee for a articular diagnosis. C. facilities that specialize in the patients who are most seriously ill. D.

    asked by Pat
  53. St Teresas College

    Subject:Chemistry What is the difference between seawater and pure water in terms of osmotic pressure and vapour pressure?

    asked by Sulu
  54. Physics

    The slab of steel shown below is being lifted at 0.50 m/s. It weighs 1.91×103N. If the angle θ equals 61.4 degrees, what is the tension in each cable?

    asked by Jack
  55. Math

    A package of 4 mechanical pencils comes with 2 free erasers.If you get a total of 12 free erasers, how many packages of pencils did you buy?

    asked by Dania
  56. Chemistry

    During the synthesis of a Grignard reagent in diethyl ether solvent, what is the identity of the bubbles that show up on the surface of the magnesium? -Gaseous magnesium byproducts -Gaseous O2 -Gaseous H2 -Gaseous diethyl ether

    asked by Ash
  57. Math

    A 27 3/4 foot piece of rope will be cut into as many 2 1/2 foot pieces as possible. How many 2 1/2 foot pieces will there be and how much rope is left.

    asked by annonymous
  58. Functions

    Is {e^x} periodic function?

    asked by Edward
  59. Science

    I have homework in which it asks "Describe the difference between elements, mixtures and compounds. (I have done the first sentence as it was fairly easy. Next is the part I don't understand) You need to draw their chemical formulae (for example KCl for

    asked by Ryan
  60. MATH

    Susan spent 2/3 of her money on a shirt. If she has $12.25 left, how much did the shirt cost?

    asked by annonymous
  61. General Chemistry

    Sodium Hydroxide reacts with hydrobromic acid to yield two products. Write out a balanced molecular reaction, overall ionic reaction and a net ion reaction. I have the molecular reaction, which I got: NaOH + HBr -> NaBr + H20 Correct? Any help with the

    asked by Cheyenne
  62. Chemistry

    Describe in words how you would make a 1.00 M solution of HCl from a 5.00 M solution of HCl. Completely stumped here. Any help?

    asked by Brianna
  63. science

    True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of

    asked by Julia
  64. math

    3x-2y=8 5x-2y=9 using elimination method.. please help.

    asked by sally
  65. Chemistry

    A goal of the acid-base titration in this scenario is to determine the concentration of sodium hydroxide solution. To do this, a 1.3000 g sample of potassium hydrogen phthalate (KHC8H4O4) is massed out. The KHP has one acid proton (H+). The solid is

    asked by Seth
  66. algebra

    find three consecutive integers whose product is 33 larger than the cube of the smallest integer

    asked by stacy
  67. Physics

    A rock is projected vertically upward with a velocity of 58.0 m/s. How many metres will it pass over in the third second of its upward travel ?

    asked by Mike
  68. Phyics

    A particle, which starts from rest, covers a distance of 19.94 cm in the first 8.6 seconds. Find the acceleration (in m/s2) of the particle at the end of 8.6 seconds.

    asked by Susan
  69. chem

    a) Potassium-40 undergoes three different modes of radioactive decay (Beta decay, Positron decay, and Electron Capture decay). Write balanced nuclear reactions for each of these decay modes. Are the products stable (not radioactive)? b) Potassium-40 has a

    asked by brett
  70. Criminal Justice/White Collar Crime

    Excessive billing can take several forms. What are retainers? A. Patients paying directly for services such as calls, refills, and conferences that Medicare considers covered. B. Contracts for services that exceed Medicare limits. C. Up-front fees for

    asked by Pat
  71. Z table

    (1 point) Women's weights are normally distributed with a mean given by μ=143 lb and a standard deviation given by σ=29 lb. Find the fifth decile, D5, which separates the bottom 50% from the top 50%

    asked by Anonymous
  72. Z table

    The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia. One of the chemical compounds produced from the plant was analyzed for a particular collagen. The collagen amount was found to be normally distributed with a mean

    asked by Anonymous
  73. Taalnet

    a fence has 200m of fencing to enclose two adjacent rectangular fences .find the dimensions such that the area enclosed will be 1400 square metre

    asked by fon valerie
  74. Simultaneous equation need help

    The following simultaneous equations are written in base two 11x+10y=10001 10x-y=10 solve and live your anser in base two?? plz help tnx

    asked by Collins
  75. math

    Harry drove 4 hours on the freeway, then decreased his speed by 20 mph and drove for 2 more hours on a country road. if his total trip was 362 miles, then what was his speed on the freeway? I really have no idea how to do this.

    asked by Rachelle
  76. science

    The net force on a rock with a mass of 2.0kg is 19.6N. What is the acceleration of the rock?

    asked by Liea
  77. AP Chem

    Write the half reactions and the balanced equation for the galvanic cell Hg(ℓ)| Hg2+ 2 (aq)|| MnO− 4 (aq), Mn2+(aq), H +(aq)| Pt(s). What is the smallest possible integer coef- ficient of H+(aq) in the combined balanced equation?

    asked by Anonymous
  78. Edible playdough

    Hey guys, Does anyone have a website for edible playdough that does not require a heat source(ie. microwave, stove top)? I am doing this for a demonstration speech.

    asked by Anonymous
  79. science

    Compare how your weight, mass, and the normal force exerted by the floor change when you are in an elevator that starts from rest and accelerates upward.

    asked by Liea
  80. Topic sentence and supporting details

    Hilda take an enormous amount of space

    asked by Jennifer
  81. english

    topic sentence and supporting details

    asked by Jennifer
  82. english composition

    Biosocial science is a new area of science that has developed from recent discoveries. These discoveries include new information about the nature versus nurture debate, cultural determination, and genetic and behavioral tendencies. Researchers hope this

    asked by Mark
  83. Latin

    I'm having a hard time figuring out what Au means

    asked by jasmina
  84. CHEMISTRY !!! HELP !

    You have 875 mL of an 0.53 M acetic acid solution. What volume (V) of 1.30 M NaOH solution must you add in order to prepare an acetate buffer of pH = 4.94? (The pKa of acetic acid is 4.76.)

    asked by Owen
  85. Criminal Justice/White Collar Crime

    An authorized program planted on a computer is known as a(n): A. Trojan Horse. B. Achilles Heel. C. Sword of Damocles. D. Cyclops Eye. My textbook only mentions an "unauthorized program" which is a Trojan Horse. But I looked on line and I think it may be

    asked by Pat
  86. trig

    A skateboard wheel has a radius of 2.08 inches and is turning at a rate of 945 rpm. a. what is the angular speed in radians per second? in degrees per second? b. how fast is the skateboard traveling (in miles per hour)?

    asked by Mohamad
  87. Social Stuides

    Write at least one way that the United States has influenced another nation-state and at least one way that another nation-state has influenced the United States.

    asked by Zach
  88. Math

    Which two terms in (3+14)+27 could you add to get a multiple of ten

    asked by Char
  89. English

    What kind of figurative language is “Play dead often and long enough and people begin to think you are.” ?

    asked by Bethany
  90. Calculus

    You are expecting a tax refund of $4,000 in 4 weeks. A tax preparer offers you an "interest-free" loan of $4,000 for a fee of $50 to be repaid by your refund check when it arrives in 4 weeks. Thinking of the fee as interest, what simple interest rate would

    asked by Anonymous
  91. Maths word problem need help

    In order to save one million naira for the purchase of some goods a man save #1,#2,#4 #8 on the first,second,third and fourth day respectively.At this rate assuming that no interest was added (a):what amount was saved on the 15th day? (b):at least how many

    asked by Collins
  92. math

    A rectangular room is 5 meters longer than it is wide, and its perimeter is 22 meters. a. Letting w represent the width of the rectangle, write an equation that represents the perimeter of the room. = 22 b. Find the width of the room. The width is: meters.

    asked by mya
  93. global history s.s.

    how did geography influence the city-states of Sumer?

    asked by stefanos
  94. Mathematics in Science

    Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 17.10 m wide by 13.0 m long. 17.10*13.0=222.3 m^2 is this right?

    asked by Helpppppppppppppppp Plzzzzzzzzzzz
  95. Geometry

    Elaine purchased 4.5 yards of lace trim from her local fabric shop. She has a circular tablecloth that is 54 inches in diameter and a square tablecloth that is 40 inches on each side. Can she trim either tablecloth?

    asked by Clarissa
  96. SS

    Was Phoenicia in Mesopotamia?

    asked by Anonymous
  97. Criminal Justice/White Collar Crime

    According to the text, the broad definition of computer crime can be described as: A. hardware and software crimes. B. viruses and worms. C. espionage and embezzlement. D. hacking and denial of service. I am stumped on this one cause my textbook mentions

    asked by Pat
  98. global history

    Describe 3 accomplishments of Sumerian civilization and explain how each influenced later people

    asked by stefanos
  99. Physics

    Forces of 10.3N north, 19.5N east, and 15.2N south are simultaneously applied to a 4.06kg mass as it rests on an air table. What is the magnitude of its acceleration?

    asked by King
  100. Math

    solve for x (4/4)x^2-(12/4)x+(61/4)=0

    asked by Dan
  101. CHEMISTRY !!! HELP !

    A 70.0 mL solution of 0.165 M potassium alaninate (H2NC2H5CO2K) is titrated with 0.165 M HCl. The pKa values for the amino acid alanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond to the carboxylic acid and amino groups, respectively. Calculate pH

    asked by Owen
  102. math

    A rectangular room is 5 meters longer than it is wide, and its perimeter is 22 meters. a. Letting w represent the width of the rectangle, write an equation that represents the perimeter of the room. = 22 b. Find the width of the room. The width is: meters.

    asked by mya
  103. differential calculus

    differentiate g(t)=3/sqrt(t)

    asked by Anonymous
  104. Proportions

    A 130 lbs man burned 194 calories during a 30 minute tennis session. How many calories would a 250 lbs man burn in the same time frame doing the same activity(assuming they burn calories at the same rate)? I just need help figuring out what the equation

    asked by Elizabeth
  105. ALGEBRA

    A rectangular room is 4.15 meters longer than it is wide, and its perimeter is 27.9 meters. Find the dimensions of the room. The length is :-------- meters and the width is -----meters.

    asked by NINA
  106. lgebra

    The sum of three consecutive natural numbers is 963, find the numbers. (A) First, write out an equation that models the relationship between these three numbers: x + ____ +______ = 963 2nd number 3rd number (B) Now, simplify the left side of your equation:

    asked by NINA
  107. Computer Science

    0 down vote favorite I have to print: Ain't no sunshine when she's gone It's not warm when she's away. Ain't no sunshine when she's gone And she's always gone too long Anytime she goes away. How would I used methods to print these no loops? Would it be

    asked by Jake
  108. Algebra

    There are 25 quarts of 20% anti freeze solution in the radiator of a car. How many quarts of anti freeze must be added to make a 50% anti freeze solution

    asked by Nichole
  109. Phsyics

    To ward off oceanic invaders, a cannon is placed 10 meters from the water's edge, pointing out at sea. The cannon is capable of firing a projectile at a maximum velocity of 100m/s. a) what is the maximum firing range of the cannon? b)If the cannon was

    asked by Anonymous
  110. Calculus

    Let f(x)=1/x. Compute the difference quotient for f(x) at x=1 with h=0.3 I know that the formula for difference quotient is (f(x+h)-f(x))/h, but I am not sure how I am supposed to plug this in. I have tried a few ways but webworks says that the answer is

    asked by :(
  111. math

    a swimming pool is 25m by 15m.A 2-m concrete walk is built around the pool.What is the area of the walk?

    asked by Anonymous
  112. calculus

    domain of -9/2+t^2 and 1-4t/2+t

    asked by Anonymous
  113. math

    Gregory is 2 years older than Esmeralda. In 5 years the sum of their ages will be 42. How old is Esmeralda now? (A) Translate the given information into an equation using the variable x = current age of Esmeralda. Simplify the left side of your equation. =

    asked by Anonymous
  114. Chemistry

    A 150.0-g sample of a metal at 69.7°C is added to 150.0 g of H2O at 10.5°C. The temperature of the water rises to 13.6°C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water.

    asked by Anonymous
  115. Physics

    A 41 kg child sits in a swing supported by two chains, each 1.4 m long. If the tension in each chain at the lowest point is 261 N, find the child’s speed at the lowest point. (Neglect the mass of the seat.) Find the force of the seat on the child at the

    asked by Maddie
  116. MATH

    Use the following time value of money tables to answer the following questions. Assume that the annual rate of interest is 6% for each of the four following problems. i = 6% Time Periods (n) Future Value of 1 Present Value of 1 Future Value of an Annuity

    asked by MARISSA
  117. Scienece

    A student crystallized a compound from benzene and observed only a few crystals when the solution cooled to room temperature. To increase the yield of crystals, the students chilled the mixture in an ice-water bath. The chilling greatly increased the

    asked by Josaff
  118. Phy

    In the figure, a block of mass m = 3.09 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of magnitude F = 13.7 N at an angle θ = 23.0°. (a) What is the magnitude of the block's acceleration? (b) The force magnitude F is

    asked by Kyle
  119. physics - engine

    A car V8 has a bore of 4 in. and a stroke of 2.5 in., what is the engine size?

    asked by kim
  120. Chemistry

    Find two interesting factoids for ammonium iodide, sodium acetate, silver nitrate, calcium carbonate, lithium carbonate, aluminum chloride, and potassium iodide. What does "factoids" mean? I am still confused with the definition. Does it mean that the

    asked by Anonymous
  121. Maths: Sequences need help

    The nth term of a sequences of v1,v2,v3 is given by Vn=6 2^n (1):show that for all value of n>1 Vn1=2(Vn-3)?? (2): obtain and simplify the sum of the first n term of the sequence??

    asked by Collins