# Questions Asked onFebruary 21, 2013

1. ## math

pat has some t-shirts. 1/4 of the t-shirts are pink, 1/2 of the remainder are white and the rest are purple. what fraction of the t-shirts are purple?

2. ## Algebra

In a recent survey of middle school students about pizza toppings, it was found that 25 students like pepperoni pizza, 31 like banana peppers pizza, and 5 liked both pepperoni and banana peppers on their pizza. If 65 students were surveyed, how many

3. ## chemistry

A solution contains 2 mEq/ml of KCL (Molecular weight 74.5). If a 20 ml ampule of this solution is diluted to 1 liter what is the percent strength of the resulting solution?

4. ## math

of the total number of spectators at a circus show, 1/4 are men, 2/5 of the remaining number of spectators are women. there are 132 women at the circus show. how many children are at the circus show?

5. ## chemistry

the concentration of urea (MW=60.0g/mol) in a soltuion prepared by dissolving 16g of urea in 39g of H2O is ____ molal

6. ## physics

A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V0x = 310 m/s and V0y = 26 m/s. The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m

8. Neither of the glasses _________ full of juice. were weren't *was wasn't 9. In the living room _________ many interesting pieces of art. is isn't *are aren't Thank You

8. ## chemistry

if 125g of magnesium sulfate heptahydrate is completely dehydrated, how many grams of anhydrous salt will remain? i would really appreciate anyone's help

9. ## math

A major corporation is building a 4325 acre complex of homes, offices, stores, schools, and churches in the rural community of Glen Cove. As a result of this development, the planners have estimated that Glen Clove's population (in thousands) t yr from now

10. ## chemistry

A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?

11. ## Trigonometry

Write the trigonometric expression as an algebraic expression. 1.) SIN(ARCSIN X+ARCCOS X) ANSWER: 1 2.) SIN(ARCTAN 2X-ARCCOS X) ANSWER: 2x²-SquareRoot of 1-x²/Square Root of 4x²+1.

31. ## Chemistry

A 1.0-mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.010 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. a color change occured after 40 seconds. the rate of reaction is measured by the disappearance of HIO3. got the

32. ## maths-TRIGNOMETRY

show that: 2^5 cos^2a sin^4a=cos6a-2cos4a- cos2a + 2

33. ## Algebra I

The cost of 4 scarves and 6 hats is $52. The cost of two hats is$1 more than the cost of one scarf. What are the costs of one scarf and one hat? Please show me how to set this up and work it.

34. ## Algebra

Which is the best measure of central tendency for the type of data below–the mean, the median, or the mode? Explain. Hours of sleep each night A.Median; there will be outliers B.Range; there are no outliers C.Mode; the data are non-numeric D.Mean; the

35. ## physics

Calculate the speed of a proton having a kinetic energy of 1.00 × 10^−19 J and a mass of 1.673 × 10^−27kg. Answer in units of m/s

36. ## physics

a point charge of -4.00nc is the origin, and a second point charge of +6.00nc is on the x axis at x=0.800m. Find the magnitude and directin of the electric field at each of the following points on the x asix : a) x =20.0 cm b) x=1.20 m c) x = -20.0 cm

37. ## physics

A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.9 m/s. If the coefficient of friction between the sled's runners and snow is 0.045 and the boy and sled together weigh 580 N, how far does the sled travel on the

38. ## english

Write a paragraph naming three possible agendas and one example of each that you might find in the media.

39. ## Math

Sam cut a pie into equal slices. There are only 3 slices left. The angle measure of the 3 slices is 72 degrees How many slices did sam cut the pie into?

47. ## Chemistry

A laboratory stockroom has a stock solution of 90%(m/v) sulfuric acid,H2SO4(aq). If a technician dilutes 50ml of the stock solution to a final volume of 300ml, what will be the new mass/volume percent concentration?(HINT: the dilution formula can be used

48. ## Physics

a Negative Charge of -6.0 x 10^-6 C exerts an attractive force of 65 N on a second charge 0.050 m away. What is the magnitude on the second charge?

49. ## Math

A circle is divided into 18 equal parts. How many degrees is the angle for each part? How many degrees is the angle for 5 parts?

50. ## math

jodys has a rectangular piece of fabric 7/8 yard long and 4/5 yard wide. a)what is the area of the pieces of fabric?(I already did this one) b) jody decides to share the piece of fabric equally with her friend. what is the area of fabric each person

51. ## Applied Calculus

Use differentials to approximate the quantity (give answer to 4 decimal places) 4th root of 256.6.

52. ## MATH

UNSCRAMBLE 25 LETTERS TO MAKE 8 WORDS THAT ANSWER THE QUESTION WHAT'S WRONG WITH GETTING A HAIRCUT? LETTERS: H I T I S B E T E R T O G E T T S E M L O C R E T

53. ## geometry

Which type of angle do construction workers use when building to make sure that the walls and floors of a building are perpendicular

When a square of area 4 is dilated by a scale factor of k, we obtain a square of area 9. Find the sum of all possible values of k. I do not understand...it is not 3/2, as I was told, but I don't understand why? Help?

55. ## Physics

A 2.1 kg mass is connected to a spring with spring constant k= 180 N/m and unstretched length 16 cm. The pair are mounted on a frictionless air table, with the free end of the spring attached to a frictionless pivot. The mass is set into circular motion at

56. ## science

Name 2 elements that would have properties similar to Beryllium with atomic weight higher than 130.

57. ## Earth Science

Why is potassium-argon dating most applicable to dating very old rocks? potassium’s long half-life potassium’s short half-life argon’s long half-life argon’s short half-life

58. ## Composition

Revise the following paragraph, improving it without changing its overall meaning. Pay particular attention to sentence structure. Ever been assigned to work on a group project for class! Many students dread group projects: because one student typically

59. ## Organic

Balanced reaction for cyclohexene to adipic acid. Used na2wo4 with h2o2, PTC, and khso4.

60. ## college chemistry

how to make a 1:8 dilution of chemical Y. You have 350 mililiters of chemical Y. how much diluent do you need?

61. ## math

jodys has a rectangular piece of fabric 7/8 yard long and 4/5 yard wide. a)what is the area of the pieces of fabric?(I already did this one) b) jody decides to share the piece of fabric equally with her friend. what is the area of fabric each person

62. ## Chemistry

Hydrogen peroxide solution, H2O2(aq), is available with a concentration of 1.667mol/L. When diluted to a concentration of 0.25mol/L, the solution is used as a disinfectant. What volume of water should be added to 100 mL of the concentrated hydrogen

63. ## chemistry

a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?

64. ## Statistics

Which of the following is an accurate description of Simpson's paradox? When groups of data are aggregated, an association can get stronger because of a confounding variable. That confounding variable is usually the number of observations in different

65. ## science

List 3 other elements similar to properties of Flourine. a. Why did you choose these? b. How did you determine their properties were similar?

66. ## Physics

Find the mass of water that vaporizes when 3.94 kg of mercury at 248 °C is added to 0.183 kg of water at 83.0 °C.

67. ## Chemistry - Mass-Mass conversion & Percent yield

Please show work 1. N2 (g) + 3H2(g) ---> 2NH3(g) 100.0 g of nitrogen reacts completely with excess hydrogen, and 34.0 g of NH3 are obtained what is the percent yield of ammonia? 2. 2Al (s) + 3Cl2(g) ---> 2AlCl3(s) Assume that 0.40 g of Al is mixed with

68. ## Chemistry

What is the lewis dot structure for copper?

69. ## math

pat has some t-shirts. 1/4 of the t-shirts are pink, 1/2 of the remainder are white and the rest are purple. what fraction of the t-shirts are purple?

70. ## chem

For each of the following equilibria, use Le Chatelier's principle to predict the direction of reaction when the volume is increased. (a) C(s) + H2O(g) CO(g) + H2(g) (b) 2 H2(g) + O2(g) 2 H2O(g) (c) 2 Fe(s) + 3 H2O(g) Fe2O3(s) + 3 H2(g) a i put no change

71. ## chemistry

How do you find q in q=mC delta t without the mass

72. ## physics

Calculate the magnitude of the electric field at one corner of a square 1.48m on a side if the other three corners are occupied by 1.92×10−6 Ccharges.

73. ## Geology

How were divisions of time separated when scientists created the geologic time scale? by the thickness of rock strata by the color of rock strata by the fossils found in rock strata by the location of rock strata

74. ## math

Tina completed 2/3 of her homework before dinner. George c ompleted 4/7 of his homework before dinner. Who completed a greater fraction of homework?

75. ## English

Revise the following paragraph, improving it without changing its overall meaning. Pay particular attention to sentence structure. Ever been assigned to work on a group project for class! Many students dread group projects: because one student typically

76. ## English

Expand each sentence below by adding words or phrases that modify the verb. Questions after each item suggest details you can add. An example is given. Example: Ancient people painted. How did they paint? Where did they paint? Ancient people painted

77. ## math $$The graph of 5x-2y=10 intersects the x-axis and y-axis what are the order pairs for these two points of intersection? A.(2,0) and (0,5) B.(2,0) and (0,-5) C.(-2,0) and (0,5) D.(-2,0) and (0,-5) asked by Angie 78. ## Math Kurt cut pizzasinto wedges measuring 40 degrees. I feach person eats one piece of pizza how many people could he feed with two whole pizzas asked by Trent 79. ## chemistry A solution is prepared by mixing 50.7 mL of 0.28 M Pb(NO3)2 with 70.8 mL of 1.0 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6 10-5. asked by jeff 80. ## math A marathon runner ran the first 5 mi. in 32.5 min. If she continues running at this pace, how long will it take her to run the entire marathon of 26.2 mi? asked by Brittany 81. ## analytical chemistry your lab possesses a stock solution of NaOH whose concentration is approx. 0.1M. you prepare a secondary solution by diluting 15.00mL of this stock solution to a total volume of 250.0 mL. you titrate a 50.00mL aliquot of the secondary solution with a asked by holly 82. ## Physics A point charge Q1=−2 μC is located at x=0, and a point charge Q2=+8 μC is placed at x=−0.5 m on the x-axis of a cartesian coordinate system.The goal of this problem is to determine the electric field, E⃗ (x)=E(x)xˆ, at various points along the asked by Anonymous 83. ## Physics (Velocity in two dimensions) Please help, The displacement vector for a 15.0 second interval of a jet airplane's flight is (3850, −2430) m. (a) What is the magnitude of the average velocity? (b) At what angle, measured from the positive x axis, did the airplane fly during this time asked by Kathy 84. ## science please help So I have to do this project on simple machines. The invention we need to make should have at least 2 simple machines on it. We also have to draw it on posterboard and write a paragraph about it. One more thing is that it must make a person's life easier asked by Anonymous 85. ## trig Express sin4xcos3x as a sum or differences of sines and cosines asked by Fabian onyango ndege 86. ## Math Kelsea has 6 coins. One-third of her coins are dimes. The value of the dimes is one-fourth the value of the coins. How much money does Kelsea have? asked by Alex 87. ## math$$

The graph of 5x-2y=10 intersects the x-axis and y-axis what are the order pairs for these two points of intersection? A.(2,0) and (0,5) B.(2,0) and (0,-5) C.(-2,0) and (0,5) D.(-2,0) and (0,-5)

88. ## Marketing

What lessons from McDonald’s success in the global marketplace are transferable across industries?

89. ## organic chem

Classify as primary, secondary, tertiary alcohols. i. 2-butanol ii. 3-methyl-3-pentanol iii. 2-methyl-1-pentanol iv. 3-chlorocyclohexanol

90. ## organic chem

Dehydrate the following a. 2-methyl-1-propanol b. 2-methylcyclohexanol c. 2-methyl-1-phenyl-1-propanol d. 1-methylcyclopentanol

91. ## science

How many atoms are in Zinc Chloride, ZnCl2?

92. ## math

Eight subtracted from six times a number is -134. What is the number? A) Translate the statement above into an equation that you can solve to answer this question. Do not solve it yet. Use x as your variable. solve for x

93. ## math

The price of a new car increased from $14,500 to$16,200. What was the percent of increase?

94. ## physics

A duck has a mass of 2.10 kg. As the duck paddles, a force of 0.110 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.240 N in a direction of 47.0° south of east. When these forces begin to act, the velocity

95. ## chemistry

what is the formula for the sodium sulfate if 3.54g of dry solid remain after 8.50g of hydrate are heated??

96. ## algebra 1

thr ratio of two integers is 6:13 the smaller interger is 54. find the larger interger

97. ## Physics

A cylindrical aluminum pipe of length 1.52 m has an inner radius of 2.20 10-3 m and an outer radius of 3.00 10-3 m. The interior of the pipe is completely filled with copper. What is the resistance of this unit? (Hint: Imagine that the pipe is connected

98. ## Physics

Two resistances, R1 and R2, are connected in series across a 15-V battery. The current increases by 0.050 A when R2 is removed, leaving R1 connected across the battery. However, the current increases by just 0.025 A when R1 is removed, leaving R2 connected

99. ## maths-urgently needed

show that: 2^5 cos^2a sin^4a = cos6a-2cos4a- cos2a + 2

100. ## Economics

Ben deposits $5000 now into an account that earns 7.5 percent interest compounded annually. He then deposits$1000 per year at the end of the first and second years. How much will the account contain 10 years after the initial deposit?

101. ## music

Why is jazz considered to be "American" music?

224. ## math

A trapezoid has an area of one and a perimeter of five. If this pattern continues, what is the perimeter of a large trapezoid with an area of 96

225. ## science

What do all the elements in Group 8 have in common?

226. ## science

what is so special about the elements in Group 8 on the Periodic table?

227. ## PreCalculus

Write the equation 5x – 4y = –7 in polar form.

228. ## math

The scale factor between figure A and figure B is zero point two five. If one side length of figure B is fifty-six yards, what is the corresponding side length of figure A?

229. ## math

if there were 97 marbles and 5 were back what percent would that be?

230. ## Grammar

How is the CAP'S noun clause used in this sentence? What I want to know is HOW ARE WE GOING TO PAY FOR THIS. A. Subject B. Direct Object C. Object of a Preposition D. Predicate Nominative

231. ## physics

An electron with initial speed = 2.54×10^7 m/s is traveling parallel to an electric field of magnitude = 1.66×10^4 N/C . How much time will elapse before it returns to its starting point?

232. ## statistics

what is percentage of scores between37.5 and 39

233. ## Science

Why not chicken lay eggs during nitht time? I want detail explanation.

234. ## Grammar

How is the CAP'S noun clause used in this sentence? What I want to know is HOW ARE WE GOING TO PAY FOR THIS. A. Subject B. Direct Object C. Object of a Preposition D. Predicate Nominative

235. ## Math

i have problems with understand what they are asking in a word problem it goes like this one jar holds 4mls more than twice. The two jars together hold the volume of the other jar. both jars together hold 712ml what is the volume the smallest jar hold.

236. ## Math

i have problems with understand what they are asking in a word problem it goes like this one jar holds 4mls more than twice. The two jars together hold the volume of the other jar. both jars together hold 712ml what is the volume the smallest jar hold.

237. ## science

While rearranging a dorm room, a student does 286 J of work in moving a desk 1.3 m. What was the magnitude of the applied horizontal force?

238. ## Science

Explain how atoms and elements differ from one another.

239. ## science

why do rubber tires deteriorate more rapidly in polluted areas than in the countryside

240. ## pre-algebra

what is the mode for this set of numbers97,86,93,56,34,39,47,62,88,54,81

241. ## Math

how to solve 5x (8 + 2) + 3 = 24 what is x?

242. ## chemistry

difference between solution and pure substance

243. ## math

Tamar is crating a veritcal bar graph to show how far each of her friends loves from school the data are in the table shown. Friend 1 2 3 4 5 6 7 8 9 10 Distance 7 8 9 9.5 6.5 16 7 7.5 8 10 from school (miles) What numbers are appropriate for Tamar to use

244. ## Math

Find the dy/dx for each equation a) y=ln(2x^6-15) b) y= 3√2x^2-3x-1/5 c) y=x^4/x^2+1

245. ## social studies

5 causes and effects on the civil rights movement.

246. ## math question

Why is 6/8 not equivalent to 18/32 ??

247. ## math

begin at the lookout tower travel east 7 units and north 4 units where are you

248. ## Chemistry

How many grams of CS2(g) can be prepared by heating 12.9 moles of S2(g) with excess carbon in a 7.00 L reaction vessel held at 900 K until equilibrium is attained? Stoichiometry is 1 to 1

249. ## chemistry

how many c atoms are contained in 15.63g of c5h12??

250. ## math

75% of teenagers own cell phones and ofthose who own cell phones, 87% use text messaging. 1. What % of teens own cell phones AND text? 2. Among those who own cell phones and text, 15% send more than 200 texts a day, or more than 6,000 texts a month. What %

251. ## Chemistry

20cm3 of 0.500moldm-3 H2SO4 was consumed to neutralize 50cm3 of 0.400moldm-3 NaOH. The temperature of the system is increased by 36 degree C. The heat capacity of the calorie meter was 39 JK-1, and the heat capacity of the solution is 4.2JK-1. Find the

252. ## accounting

Write a 3-4 Page Paper That Summarizes Your Findings From The Four Scenarios As Well As How Using Microsoft Excel Helped You With This Process

253. ## CONTACTS,CONFLICTS,AND THE CRUCIBLE

please help me thank you. What was the main reason for the isolation of Japan?. A. Domination by Chinese culture B. Difficult navigation in surrounding seas C. Weak rulers D. Lack of education

254. ## math

-x squared -2x +4 solve quadratic equation by factoring

255. ## art

visual art, what do i write for a 4 page paper on explaining the principle of design

3√(x)ln(x)

257. ## Chemistry

20cm3 of 0.500moldm-3 H2SO4 was consumed to neutralize 50cm3 of 0.400moldm-3 NaOH. The temperature of the system is increased by 36 degree C. The heat capacity of the calorie meter was 39 JK-1, and the heat capacityof the solution is 4.2JK-1. Find the

258. ## physics

When two objects move uniformly toward each other, they get 3.0 m closer each second, and when they move uniformly in the same direction with their original speeds, they get 1.0 m closer each 17 seconds. What is the speed (in meters/second) of the faster

259. ## algebra

x-9+-6x+5 A. 14 B. 7 C. 2 D. 21 thanks for your help

260. ## Play

In the play Piano Lesson, why does Berniece finally play the piano.

261. ## Algebra

How many ounces of other metal must be added to 56 ounces of pure silver to make a composition that is 70% silver? Please help me set this problem up

262. ## Physics

A charge −Q is located at x=−l/2 and a charge +Q is located at x=l/2. Thus the separation between the two charges is l. (b)What is E(x) as a function of x for x>l/2? Express your answer in terms of, if necessary, Q, l, x and the constant ϵ0 (if

263. ## US HSITORY

HOW DID MEXICAN INDEPENDENCE CHANGE TEXAS

264. ## MATH

Tamar is crating a veritcal bar graph to show how far each of her friends loves from school the data are in the table shown. Friend 1 2 3 4 5 6 7 8 9 10 Distance 7 8 9 9.5 6.5 16 7 7.5 8 10 from school (miles) What numbers are appropriate for Tamar to use

265. ## US HISTORY

WHAT PROBLEMS DID THE AMERICANS AND THE MEXICANS HAVE WITH EACH OTHER IN TEXAS

266. ## US HISTORY

WHAT HAPPENED AT THE CVITY OF GONZALES

267. ## algebra 2

Can you find the error for me in this equation, find the explicit formula, evaluate the formula for n? I think the error is in the a2-a1 formula.and the -62.50. I know the pattern is 62.50 paid per month. Your uncle loaned you some money and did not charge

268. ## Math - graphing

i am having trouble with a graphing calculator please help with these two questions 1. a census was taken from 2012 to 2020. the data collected is given in the following table. 2012-2020 L1 l2 0 6000 1 6300 2 6615 3 7012 4 7362 5 7878 6 8429 7 9272 8 10199

269. ## Lang. Arts

Which of the following groups of words in bold is nonrestrictive and should therefore be set off with commas in the sentence? A.My yarn which is blue and gray will make a very pretty scarf. B.Hats knitted by my mother are worn all winter by my family.

270. ## Lang. Arts

Read the following excerpt from Sky: We finally reached Enkhuizen, an ancient harbor town, where the brisk wind from the sea was blowing so hard that we had to hold on to hats, skirts, and scarves. We walked with farmers and their families to the ferry

271. ## math

0.5, 3/5, 1 3/4, 0.9 in order from least to greatest

272. ## Math

F(x)3√(x)ln(x) find the F'=

273. ## Chemistry

20cm3 of 0.500moldm-3 H2SO4 was consumed to neutralize 50cm3 of 0.400moldm-3 NaOH. The temperature of the system is increased by 36 degree C. The heat capacity of the calorie meter was 39 JK-1, and the heat capacityof the solution is 4.2JK-1. Find the

274. ## Chemistry

NH4NO3 is frequently used as a fertilizer and in explosive compounds dlta Hf values of this compound nd H20 are -365kJmol-1 and -286kJmol-1 respectively. Calculate the amount of heat released bye the dissociation of 1mol of NH4NO3 according to the

275. ## Chemistry

The \rm p \it K_{\rm a} of this reaction is 4.2. In a 0.74\it M solution of benzoic acid, what percentage of the molecules are ionized?

276. ## AP Chemistry

Formal charge: When do you use it? How is it calculated?

277. ## life orientant

Discuss5 ways in which the teenage pregnapregnancy prblem impacts on the comcommunity.provide relevant sources to. Support your claims

278. ## math

name a figure that has an area of 47 centimeters square

279. ## trig

If cot x = .78, what is tan x?

280. ## analytical chemistry

fundamental SI units of: - a distance of exactly 26 miles - an area of 1.0 square root -the volume of a sphere of radius 1.40 picometers -a density of 38. tons per cubic furlong

281. ## math

Hello! I am confused on how to do this math problem. Can you please help me or explain how you get this answer please? Miriam orders a shipment of 1, 500 pounds of ice for her supermarket. The ice comes in individual 5-pound bags that cost Miriam

282. ## math

frank cut a pie into 10 equal slices. There are only 3 slices left. what is the measure of the angle for 3 slices that are left?

283. ## maths

What is the total area bounded by the curve y^2(1-x) = x^2(1+x) and the line x = 1

284. ## chemistry

why is the graph of the meliting points of hydrocarbons not consistent?

285. ## math

the product of 237 and 13