# Questions Asked onSeptember 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

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

3. ## Sociology

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

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

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

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?

7. ## CBU

How to calculate moles in a sample

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' =

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

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

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

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

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?

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?

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.

17. ## Maths area

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

18. ## life orientation

Campaign with responsibility interview questions

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?

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.

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?

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. :/

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.

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

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

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

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

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?

29. ## math

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

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.

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?

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

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.

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

35. ## Test

How do you hurry up on taking a test?

36. ## dav

Find molarity of alcl3 if normality is 0.2

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

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.

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?

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

41. ## math

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

42. ## chemistry

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

43. ## chemistry

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

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

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

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?

47. ## St Teresas College

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

48. ## math

How do you multiply 16 3/4

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?

50. ## MATH

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

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

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.

53. ## St Teresas College

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

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?

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?

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

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.

58. ## Functions

Is {e^x} periodic function?

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

60. ## MATH

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

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

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?

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

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

66. ## algebra

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

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 ?

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.

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

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

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%

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

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

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.

76. ## science

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

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?

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.

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.

80. ## Topic sentence and supporting details

Hilda take an enormous amount of space

81. ## english

topic sentence and supporting details

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

83. ## Latin

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

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.)

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

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)?

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.

88. ## Math

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

89. ## English

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

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

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

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.

93. ## global history s.s.

how did geography influence the city-states of Sumer?

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?

96. ## SS

Was Phoenicia in Mesopotamia?

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

98. ## global history

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

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?

100. ## Math

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

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

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.

103. ## differential calculus

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

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

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.

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:

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

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

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

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

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?

112. ## calculus

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

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. =

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.

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

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

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

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

119. ## physics - engine

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