# Questions Asked onOctober 3, 2010

1. ## College Chemistry

I balanced the equation: HBr(aq) +NH3(aq)->NH4Br I need to find the ionic equation and the net ionic equation

2. ## Biology

In what situations would sampling work best for estimating population size, in what situations would mark and recapture work best and why?

3. ## physics

A stream is 30. meters wide and its current flows southward at 1.5 meters per second. A toy boat is launched with a velocity of 2.0 meters per second eastward from the west bank of the stream a. what is the magnitude of the boat's resultant velocity as it

4. ## Chemisty

How can naphthalene be separayed from a mixture of KBr and Sand? How can you separate NiCO3 from NaCO3 in detail? How can you separate AgCl from NaCl in detail?

5. ## Chemistry

What happens when magnesium is added to Maleic and Fumaric acid? What gas is released from this reaction? I was also wondering if their are any differences between how each acid reacts with the magnesium because one is cis and the other trans. What happens

6. ## chemistry

what is the general formula for a hydrate?

7. ## Chemistry

Suppose you tried to combine 42 grams of magnesium with 45 grams of oxygen. Which of the two substances would be left after the reaction? How much magnesium oxide will be formed?

8. ## Organic Chemistry - Extraction

You have 100 mL of a solution of benzoic acid in water; the amount of benzoic acid in the solution is estimated to be about 0.30 g. The distribution coefficient of benzoic acid in diethyl ether and water is approximately 10. Calculate the amount of acid

9. ## Chemistry

H2O (l) requires the largest amount of energy to raise the temperature of 25.0g H2O of the substance from 15.0 *C to 37.0 *C. Calculate the energy. Hg (l) has the largest temperature change when 550 g of the substance absorbs 10.7kJ of energy. Calculate

10. ## physics

A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion in which the string traces a conical surface with half-angle = 25.0. What tangential speed must the bob have so that it moves in

11. ## Chemistry

How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? 4HCl + O2 --> 2H2O + 2Cl

12. ## chemistry

A nickel has a mass of 5.000 grams and is composed of 25% nickel and 75% copper. What is the mass of copper in the nickel? How many moles of copper are in this nickel? How many copper atoms are in this nickel?

13. ## Chemistry

If the initial pressure of NH3(g) is 0.7317 atm, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 500.0 °C is 67100.00. The initial pressure of the reaction products is 0

A spider has 8 legs. An ant has 6 legs. There are a group of spiders and a group of ants. The groups have equal numbers of legs. What is the least number of spiders and ants in each group.

15. ## Math

Of people who died in the US in recent years, 86% were white, 12% were black, and 2% were Asian. (This ignores a small number of deaths among other races.) Diabetes cause 2.8% of deaths among whites, 4.4% among blacks, and 3.5% among Asians. The

16. ## Chemistry

Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide,H2O2, can be titrated against a solution of potassium permanganate, KMnO4. The following equation represents the

17. ## College Chem

I need to be able to describe how to prepare 20 mL of a 0.0050 M KIO3 solution from a stock solution with a concentration of 0.020 M.

If a car is accelerating downhill under a net force of 3674, what additional force would cause the car to have a constant velocity?

19. ## Physics, Science

A 26 kg block is connected to an empty 1 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.435 and the coefficient of kinetic friction between the table and the block is 0.320.

20. ## chem

whats the net ionic equation for the following reaction AgNo3(aq)+Na2SO4(aq) answer 2Ag+(aq)+SO42- (aq)___> Ag2So4(s) correct?

21. ## Physics

A coin is placed 17.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 33 is reached and the coin slides off.What is the coefficient of

22. ## Physics

Researchers have found that a gecko's foot is covered with hundreds of thousands of small hairs (setae) that allow it to walk up walls and even across ceilings. A single foot pad, which has an area of , can attach to a wall or ceiling with a force of 11 .

23. ## Chemistry

a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at the same time, 45J of heat is transferred from the surroundings to the system. Against what pressure was the piston working?

24. ## Physics

The board sandwiched between two other boards weighs 92.6 N. If the coefficient of friction between the boards is 0.587, what must be the magnitude of the horizontal forces acting on both sides of the center board to keep it from slipping downward? Answer

25. ## College Chem

Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.

26. ## Physics

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/20 of its value at the Earth's surface?

27. ## College Chemistry

Sodium hydroxide is used extensively in acid-base titrations because it is a strong inexpensive base. A sodium hydroxide solution was standardized by titrating 27 mL of 0.1628 M standard hydrochloric acid. The initial buret reading of the sodium hydroxide

28. ## English

11. Upon the death of Spitz in The Call of the Wild, Francois and Perrault decide that the new sled-team leader should be

29. ## managerial eccon

Suppose that a firm is currently employing 30 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is:$3,600. what is the averge variable cost?

At her wedding, Jennifer lines up all the single females in a straight line away from her in preparation for the tossing of the bridal bouquet. She stands Kelly at 1.0 m, Kendra at 1.5 m, Mary at 2.0 m, Kristen at 25 m, and Lauren at 3.0 m. Jennifer turns

31. ## Physics

A 83.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.80 m/s2

32. ## Maths - trig

Solve 3cos2x - 7cosx = 0, when 0

33. ## Chemistry

Consider the following errors that could be made when running TLC. Indicate what should be done to correct the error. a) a two-component mixture containing 1-octene and 1,4-dimethylbenzene gave only one spot with an Rf value of .95. The solvent uses was

34. ## Chemistry

What would the molarity of 50 mL of 3% hydrogen peroxide be if it's volume/volume? I know how to do weight/volume but not this, someone help?

35. ## PHYSICSS

A block is projected up a frictionless inclined plane with initial speed v1 = 3.40 m/s. The angle of incline is è = 31.1°. (a) How far up the plane does it go?(m) (b) How long does it take to get there? (s) (c) What is its speed when it gets back to the

36. ## Finance

moussawi ltd's outstanding bonds have a $1000 par value, and they mature in 5 years. their yield to maturity is 9%, based on semiannual compounding, and the current market price is$853.61. what is the bonds annual coupon interest rate?

37. ## Chemistry

25.0 mL of a NaCl solution (concentration unknown) was found to react with 20 drops of the chloride test solution from the PU Chloride Test Kit. Calculate the mass of NaCl (in grams) in this solution. Calculate the mass of NaCl required to prepare 0.250 L

38. ## anna

From the poem "The Wanderer" What is the plight of the wanderer "earth-walker"? How did he become what he is and what is he seeking?

39. ## Physics

three vectos are shown in fig. 3-32. their magnitudes are given in arbitrary units. Determine the sum of the three vectors. Give the resultant in terms of (a) components, (b) magnitude and angle with the x axis. (3-32 --the figure has three rays all

A stream is 30. meters wide and its current flows southward at 1.5 meters per second. A toy boat is launched with a velocity of 2.0 meters per second eastward from the west bank of the stream a. what is the magnitude of the boat's resultant velocity as it

41. ## College Chemistry

What is the oxidation number of (NH4)2SO4

42. ## Chemistry

A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion. (Hint: Boyle's law applies) Please explain thoroughly!

43. ## Science

If an astronaut could hop 40 cm high on Jupiter, how high could he or she jump on Earth?

44. ## physics

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 89 at a speed of 93 ?

45. ## Essay

I'm writing an essay on the topic " The most memorable moment in your life" and I was wondering if you guy could give me suggestions on how I could start my introduction. Thanks ( The most memorable moment I chose was the first day of my summer vacation)

46. ## English

In the Minister's Black Veil by Nathaniel Hawthrone. What reasons does Hooper give for not wanting to remove his veil? I came up with one reason: that there is a Black Veil on everyone But what will the other reasons be? "Why do you tremble at me alone?"

47. ## physics

A dart gun is fired while being held horizontally at a height of 1.00 m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 5.00 m. A college student holds the same gun in a horizontal

48. ## chemistry

Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid.

49. ## chemistry

a solution of sulfiric acid is 40% H2SO4 by mass and it has a density of 1.30g/ml at 25 degrees Celcious. the molarity of this solution is....?

50. ## SOCIAL STUDIES

Is it true that Shah Jahan (emperor who built the Taj Mahal) was forced to cut off his hands after he built the Taj Mahal? If this is true then I need proof. I tried going on wikipedia but it doesn't say anything about that on history or any other heading.

51. ## chemistry

using the values for heat of fusion, specific heat of water, or heat of vaporization, calculate the amount of heat energy. Calories needed to warm 20.0g of water at 15 degrees Celsius to 72 degrees Celsius (one step) Show work please

52. ## AP English Literature

I'm doing a research essay about "anchor babies", or in other words, babies born from illegal immigrants. How would you write a good thesis?

53. ## Physics

An airplane normally flies at 280 km/h. What is its airspeed if it experiences 80 km/hr headwind?

54. ## math

using numbers 1-12 make all sides of a square equal 26 using 4 numbers a time

55. ## C.C. English

We have to rewrite this sentence to remove wordiness and jargon: Have you ever been accused of flagellating a deceased equine? What does this even mean?

56. ## Physics

An airplane flies at 200.0 km/h relative to the air. What is the velocity of the plane relative to the ground if it flies during the following wind conditions? a. a 50.0-km/h tailwind b. a 50.0-km/h headwind.

57. ## English

Thank you very much for heping me. Here are some more alternatives I'd like you to check. 1) Kurtz is said to be a brilliant talker. 2) He was good at talking. His main talent was that he was a brilliant talker who could charm (?) his audience with (or

58. ## Physics

Superwoman is hovering above the ground when a person free-falling goes by her at a terminal velocity of 140 km/h. Unfortunately, the parachute does not open. Fortunately, Superwoman is around. If it takes her 1.9 s to realize the person is in distress,

59. ## Math

A laboratory has 60 cubic centimeters of a solution that is 40% HCI acid. How many cc of a 15% solution of HCI acid should be mixed with the 60 cc of 40% acid to obtain a solution of 25% HCI? How much of the 25% solution is there? I don't know how to write

60. ## math

An elf has a staircase with 10 steps to climb. Each step it takes can cover either one stair or two stairs. In how many ways can the elf climb the stairs? For n stairs?

61. ## Physics

To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 80.0 km/h,

62. ## Chemistry

A volume of 50.0 mL of aqueous potassium hydroxide was titrated against a standard solution of sulfuric acid. What was the molarity of the KOH solution if 19.2 mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq) +H2SO4(aq)-» K2SO4(aq)+2H2O(l)

63. ## Physics

An object is thrown vertically upward with a speed of 31.8 m/s. How long does it take to reach this highest altitude?

64. ## geometry

mo bisects angle lmn,m angle lmn = 6x-20, m angle lmo= x+32 find m angle nmo but how if i don't know what lmn is

65. ## Physics

An airplane normally flies at 280 km/h. What is its airspeed if it experiences 80 km/hr headwind?

66. ## English

Thank you for your last post. Here are some sentences on clothes I'm not sure of. 1)My mum usually gives me 50-Euro pocket money monthly to spend on clothes. 2) I don’t receive (?) any pocket money from my parents but they give me money whenever I need

67. ## Math

Describe and correct the error in writing the number 81,700,000 in scientific notation. Standard form 81,700,000 product form 81.7*100,000 scientific notation 81.7*10

68. ## Statistics

In a given normal distribution, the standard deviation is 14.4 and 8.27% of the distribution lies to the left of 60. What is the mean?

69. ## AP chemistry

8.3 grams of NaCl and 3 grams of KBr were dissolved in 47 mL of water. What is the mole fraction of KBr in the solution? I know that the mole fraction of the KBr and Nacl (without using the mL H2O is .2, but, i am confused on where i use that mL in the

70. ## College Chem

How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? Convert liters to milliliters and then to grams. can you convert mil to grams?

71. ## chemistry

How many grams of water are formed when 43.4 g of hydrogen are consumed in an excess of oxygen? I got 390.6 is this correct?

72. ## physicsssss

two blocks are connected over a pulley. The mass of block A is 10 kg and the coefficient of kinetic friction between A and the incline is 0.24. Angle èof the incline is 30°. Block A slides down the incline at constant speed. What is the mass of block B?

73. ## Organic Chemistry

Determine bond length and bond strength? The picture of the problem is shown here: oi52[insert dot]tinypic[insert dot]com/jfgnb6[insert dot]jpg I got the following: I think that the strongest bond is the triple bond (A). I think that the shortest bond is

74. ## Chemistry

When one pound of gasoline (made up of compounds of hydrogen and carbon) is burned in an automobile approximately 3 pounds of carbon dioxide, CO2, is given off. Carbon dioxide is one of the gases contributing to global warming. What information from this

75. ## chemistry

To analyze for barium in an unknown white powder, an excess of sodium sulfate solution was added to a 0.576 g sample of the powder dissolved in water. A white precipitate of BaSO4 was isolated, dried, and found to weigh 0.438 g. What is the mass percent of

76. ## math 12

log6=x and log8=y, determine an expression for log3 in terms of x an y.

77. ## Science(cell Parts)

My Project is a Cell City For Example, my city is McDonald's, so the Nucleus is The ordering desk, the Mitochondria is the workers, and the Wall is the Cell Membrane.I Don't have Anymore ideas For The Rest Of The Organelle. These Are The Organelle:

78. ## Physics

If I throw a tennis ball straight up in the air at the same time my friend throws one straight down at the same height-initial height 3 feet and initial speed 2 km, which ball lands on the ground first, has the greater acceleration, lands with a greater

79. ## Chemistry

Use de Broglie's relationship to determine the wavelength of carbon atom moving at 2.3 x 10^5 m/s.(Hint: First determine the mass in kg of one move of carbon atoms)

159. ## physics

By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 4 m/s2?

160. ## Physics

If the jet is moving at a speed of 1800 at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.4 's The jet is moving in a verticle loop

161. ## algabra 2

One side of a triangle is 4 cm longer than the shortest side and 2 cm shorter than the longest side. The perimeter is 38 cm. Find the dimensions of the triangle.

162. ## physics

An object is thrown vertically upward with a speed of 31.8 m/s. How high does it rise?

163. ## geometry

what is the area of a hexagon with a 48 inch perimeter? i know its 166.277 but i need that in square root form?

164. ## chemistry

Calculate the volume of 1.80 M \rm Na_3PO_4 in milliliters that contains 6.00 g of solute.

an algebraic expression for p+3 and show me how to do it

7-x+5=4

167. ## chemistry

im stuck on finding the molarity of a substance and its due tomarrow. someone please help. 5 moles of HCI in two liters. 2 moles of NaOH in 1 liter. 0.5 moles of HCI in one liter. 36 grams of HCI in one liter. thanx, alex

168. ## Physics

During a circus performance, a 75-kg human cannonball is shot out of an 19-m-long cannon. If the human cannonball spends 0.94 s in the cannon, determine the average net force exerted on him in the barrel of the cannon

169. ## college english

I have to write an essay on my neighborhood. What questions or things can I include? I need ideas please.

170. ## Math-Statistics

draw scatterplots one for which the pearson correlation coefficient is r=-1 and r=1 Stuck on how to get started

171. ## chemistry

the mechanisms between propanone and sodium hydrogensulphite

172. ## Math

x+1 - x+2 = ? --- --- 2x-8 12-3x

173. ## SOCIAL STUDIES

I am doing a country project on India. I need some good toursist attractions from India. I know a one and that's the Taj Mahal. But I need some more. Please list a few more tourist attractions, it will be a great help! thanks alot!!!

174. ## Science

ukaryotic cells contain A. a nucleus. B. cell membranes. C. organelles. D. All of these answers are true. Describe A,B and C

Hello, I am looking at the subject of no-count nouns. Which says that it does not have a singular or a plural form. The school book gives Paper for an example. But since you can say "papers" which is plural. How can paper be a non-count noun?

176. ## writing

Hello! I need to analyse fiction text in integrated text analysys. I`m not a native English speaker, therefore; i don't really understand how to analyse it. Could somebody help me with telling how to analyse?

177. ## college biostatistics

if the mean bp is 110 and the standard deviation is 15 where would 95% of population be

178. ## math

N and P are integers greater than 1 5N is the square of a number 75NP is the cube of a number smallest value for N+P IS what? thank you so much

179. ## physics

A train is traveling up a 3.6 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily? and how far did the last car travel before momentarily coming

180. ## Science

If Earth's mass were smaller, how would Earth's gravity be affected?

181. ## social studies

I messed up on my other social studies question. i ment to ask if the BUILDER of the taj mahal had his hands cut off by emperor shah jahan. Is this true? i need proof if this is true. thanks alot

182. ## accounting

The two cases described below are independent of each other. Each case provides the information necessary to prepare the stockholders' equity section of a corporate balance sheet. a. Early in 2007, Wesson Corporation was formed with the issuance of 50,000

183. ## Algebra

How to solve this x(1+x)=2 Find all the real solutions I can't remember how to solve this... the answers are -2, 1 I think...

184. ## Chemistry

A solution having a volume of 3.0L contains 23 mmol of Oxygen 2. What is the molarity of this solution?

185. ## physics

if a motorcycle accelerates from rest through the 400 m in 10 sec flat. What is its acceleration?

186. ## Physics

A box of books wighing 339 N is shoved across the floor by a force of 506 N exerted downward at an angle of 33° below the horzontal. The acceleration of gravity is 9.81m/s^2. If µk between the box and the floor is 0.59, how long does it take to move the

187. ## historical cultural

The Triple Alliance represented what change in German foreign policy?

188. ## math

Horizontal Translation and dialation Problem : let f, g, and h be defined f(x)= x2 -2< or equal to x < or equal to 2 g(x)=x-3 for all real valuse of x h(x) = 1/2 x for all real values of x a. f(g(x))= f(x-3). What transformatioon is applied to function f

189. ## To:Ms.Sue

Is it even possible to include the word "not" in a conditional to make it true? I'm thinking of some false statement and putting "not" in but it still doesn't make it true.

190. ## chemistry

write the balanced net ionic equation for this reaction Ba(OH)2+HCL-->

191. ## history.

evaluate how the age of enligtenment is a response to the age of absolutism. help please. please.

192. ## US History

what appears to be the relationship between personal income and a country's GNP

193. ## Algebra

For this equation x^(2) + x + 2 which you can't factor but then you can use the quadratic formula but than why is the answer no real solutions when I can use the quadratic formula?

194. ## history.

evaluate how the age of enligtenment is a response to the age of absolutism. help please. please.

195. ## Algebra

In cost in millions of dollars to remove x% of pollution is a lake modeled by C=5,000 over 200-2x. (a) What is the cost to remove 50% of the pullutant.

196. ## Math

How Do You Solve This Problem: [(8*2)- 13]^3+(4-1)^2+4-2*3+|3|-|-6|=?

197. ## Foreign Languages

C'est la vie (What is the meaning of this one? How do you say it? Is it French?)

198. ## Physics

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 95 at a speed of 95 ? Express your answer using two significant figures.

199. ## math

Find the drivative of the function 4ã(x^2 )+ 2/(3X)^3 + 3/sec⁡X - 5/cot⁡X=

200. ## English

When you are writing an essay that refers to two works and you are using a quote, do you (Alveraz, 30) or just put (Alveraz 30) with no comma. Thanks

why has canada import and export trends decrease during the year 2001?

202. ## graph on excel

ok so I did a radiation and distance lab: this is my results: Distance(cm) Counts(30 sec) 0 1729 1 634 2 391 3 239 4 150 5 124 6 114 7 82 8 58 9 62 10 60 11 36 12 45 so it asks me to make new columns on excel titled the following:(note: the 2 and 3 are

203. ## Sociology

How would you describe current British culture? Not stereotypes like drinking tea, going to pubs, etc. I can't find it anywhere.

204. ## algebra

Multiplying Polynomials - please assist I have the following answer - but am sure It is wrong - (3c^2d-d^3+1)8cd^2 = 24c^2d^2-8cd^5+8cd^2?

205. ## Secondary school Chemistry

Describe in general how chromatography technique can be used to analyses food to identify if it contains any poison? and also Explain the benefits and limitation of the technique used

206. ## 12/6

WHAT IS THE RAZON 2 OR 6

207. ## physics - light

Which principle of light is used in vision?

208. ## math

simplify 3.04-1.935

209. ## algebra

you are planning to spend no less than 6000 and no more than 10000 on a landscaping project. Write an inequality to show how much you are willing to spend.

210. ## science

what events or objects were studied in Hubble's paper A RELATION BETWEEN DISTANCE AND RADIAL VELOCITY AMONG EXTRA-GALACTIC NEBULAE?

211. ## MAT 116

Combine like terms? 29/13u+2/13v-18/13u+16/13v

212. ## math

Find the Cartesian product or cardinal number as requested A = {i, a} B = {t, d, m} Find A × B

213. ## chemistry

How much of a 0.25 M NaOH solution is needed to neutralize 100 mL of a 0.15 M HCl solution? The units are mL

214. ## Biology

How does a plant growth regulator differ from a plant growth hormone?

215. ## Math

The graph of any quadratic function can be drawn from the vertex form of the equation, by performing 1,2,3,or 4 transformations on the graph of f(x) = x sqaured

217. ## chemistry

what is the equation for gamma decay?

218. ## Algebra

graph inequality on a plane 4x+5y is less than or equal to 20

219. ## Physics

If the jet is moving at a speed of 1800 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.4 g's The jet is moving in a verticle loop

220. ## chemistry

what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)

221. ## chemistry

what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)

222. ## Math

Simplify by removing factors of 1 2w-4/2w

223. ## science

What does the () around an element mean, for example Mg(OH)2

224. ## Calculus

find the derivative of f(x)=((x^2+3)^5+x)^2 using the chain rule. I know that I would start with f'(x)=2((x^2+3)^5+x) but I don't know how to do the rest

225. ## Algebra 2

When you solve 6 + 5|2r-3|≥ 4, is the answer r ≥ 13/10 and r ≤ 17/10?

What is a predicate ajective and what is a predicate nomanative?

227. ## Social Studies

The passage implies that Plessey vs. Ferguson. 1. called for intergration. 2. stated that separtated facilities wer unequal. 3. was based on out bounded psychology. 4. was constitutional 5. applied only to private schools.

228. ## English composition

Music during slavery: A call to arms or a panacea?

229. ## Math

How would you explain this problem? [(8*2)- 13]^3+(4-1)^2+4-2*3+|3|-|-6|=?

230. ## math

how do you describe and correct errors when writing the number 81,700,000 in scientific notation?

231. ## Human Services, I have partial ans.

Identify and describe two types of traditional approaches to fund development. so far i came up with grant proposals. Can you help with another...Plz....

232. ## Physics

At a time when mining asteroids has become feasible, astronauts have connected a line between their 3760-kg space tug and a 6100-kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are

233. ## Physics

The result of 1.51751x10^4 divided by 6.451x10^3 to 2 significant figures is?

234. ## Physics

The jet is moving at 500 m/s in a verticle loop, with a minimum radius of 4000 m. Calculate the 69-kg pilot's effective weight (the force with which the seat pushes up on him) at the bottom of the circle, and at the top of the circle (assume the same

235. ## Physics

The sum of 5.2713x10^3 + 6.54014x10^3 expressed to 4 significant figures would be?

236. ## Science

Advice on my Tennis Ball Launcher...That Shoots 90 Meters It can't rely on anything explosive, combustion, or electricity (anything dangerous) and has to be fired from a distance of 2 meters. 2 parts: Distance- It has to shoot 90 or more meters Accuracy-

237. ## Math

Amy purchased a pair of shoes for \$52.83 during a 25% off sale. what was the regular price?

what is the best estimate of 89+12 a 90 b. 100 c. 80 d. none of these

239. ## Math

How do I simplify this expression? 2x+7+3x

240. ## biology

Name three ways that the science of biology has/does, or might impact you as an individual.

241. ## English

Thank you very much for your corrections. Here are some more sentences I'd like you to check. 1.Kurtz wanted to realize (to fulfil) his highly moral ideals but he failed. He wanted his ideals to come true but he failed because he was left alone to face the

242. ## algebra

solve the absolute value equation |1+6c|-7=-3

A number is multiplied by -3 and then this product is decreased by 7. The result is 4 less than twice the opposite of the number. what is the number?

244. ## philosophy of religion

Explain thoroughly and elaborately what Martin Buber means by real atheism as the eclipse of God. - any help will do. i'm desperate. i'm having a hard time understanding this subject. you can just tell me what atheism is according to buber even not

245. ## Biology

I can distinguish living from non-living material? I can identify and describe five basic characteristics of life and give an example of each. I can How Dr.Penelope Boston is preparing to look for evidence of life on mars.

246. ## Physics

I riding in a car at constant velocity and see an open manhole. I take out an watermelon and hold it out window. My speed is 10m/s and the initial height of watermelon is 1 m. I need to do a calculation to be able to know how far ahead of manhole I have to

WHAT IS THE GREENHOUSE EFFECT???

248. ## algebra

Multiplying Polynomials - please assist I have the following answer - but am sure It is wrong - (3c^2d-d^3+1)8cd^2 = 24c^2d^2-8cd^5+8cd^2?

249. ## physiology

what is the relatioship between electrical activity and muscle force produced ?

250. ## English

I have a few doubts regarding the use of the present perfect. I really hope you can have a look at them, too. Thank you!! 1) How long ago did you (last?) see him? 2) When did you last see him? 3) How long haven't you seen him? (Is it wrong?)Haven't you

251. ## math

there are 267 students and teachers in a school. the ratio of students to teachers is 25:2 . How many students and teachers are there?

252. ## chemistry / physics

the specific heat capacity of seawater is 3900 j/kg degrees celcius. how much energy is needed to heat 500g of seawater from 20 degrees celcius to 90 degrees celcius? if not i need to know how to work it out

253. ## Algebra

Write 9850 in scientific notation

254. ## math

looking for any mathematical characteristic of the number 13 for a math project

255. ## criminal procedure

In a hearing challenging the probable cause upon which an arrest was based, a warrantless arrest is viewed the same as an arrest based on a warrant. True or false ?

256. ## AP world history

i have to write a DBQ promt question for the interaction between humans and the enviornment (demography and disease, migration,technology, and patterns of settlement) about roman empire

257. ## Dr. Bob can you look at this

If I take a glob of mud and throw it against a wall with the speed of V and stops in time T and than I take a ball and throw it and it hits the wall with speed V and leaves the wall a time T later at a speed of 0.5V and they both have same value and mass,

258. ## English

I really need to know if the rephrasing is correct. As I'm not a native speaker, I need to consider all the possible alternatives (?).It doesn't matter if the same concept has been repeated all over again.Thank you very much for you cooperation! 1.Kurtz

259. ## Physics

How many m3 are there in 3.0475x10^5 cL, expressed to 3 significant figures?

260. ## geometry

M angle lmn =6x-20 howdo i find out what x is

261. ## Math

Find the LCM of this 6^4c^9, 3a^3c^7, 14a^8c^7

262. ## calc

y(s)= 1/(6(s^2)) - 5/s Find Y'(s)

263. ## Science of Biology

Name three ways that the science of biology has/does, or might impact you as an individual. SOMEONE PLEASE HELP ANSWER THIS QUESTION!!! THANKS :)

264. ## English

1. What you have to do is to do your best. 2. What you have to do is do your best. (Which one is right? Do we have to use 'to do' or 'do'? Are both OK?)

265. ## geometry

the scale factor between figure A and figure B is 0.25. If one side length of figure B is 56 yards, what is the corresponding side length of figure A?

266. ## physics

what happens to the speed of an airplane with a 25 km/h tailwind pushing ahead from tail to front?

267. ## History

Why did Britain react so differently and harshly after the boston tea party?

268. ## physics- urgent

an object travels at a rate of 48.5 km/sec. how many cm/min would that be

269. ## physics

A small weather rocket weighs 15.5 N. The rocket is carried up by the balloon. The rocket is released from the balloon and fired, but its engine exerts an upward force of 11.0 N. What is the acceleration of the rocket?

270. ## Math

Write a false conditional statement. Is it possible to insert the word "not" into your conditional to make it true? If so,write the true conditional. -False-If all male are human, then all human are male. -True-If all male are human, then all human are not

271. ## math 115

graph shows the yearly food cost for a family. 30% of the food cost rom 2002 was spent at restaurants. How much money did they spend that year at restaurants?

272. ## precalculus

Horizontal Translation and dialation Problem : let f, g, and h be defined f(x)= x2 -2< or equal to x < or equal to 2 g(x)=x-3 for all real valuse of x h(x) = 1/2 x for all real values of x a. f(g(x))= f(x-3). What transformatioon is applied to function f

273. ## Physics

A biotech company produces a solution with an active biomass of 8.7604x10^6 cells per litre of solution. The solution is shipped by tanker truck with a volume of 4.16462x10^1 m3. How many cells are being sent per shipment, expressed to three significant

274. ## Math

How would I simplify this? Explain please!!! 7(2x+2)-9(-1+6x)

275. ## Math

Find all numbers for which the rational expression is undefined. m^3-8m / m^2-25

276. ## Science of Biology

What exactly is the Science of Biology?? PLEASE SOMEONE HELP ME ANSWER THIS!! :)

277. ## historical cultural

The Congress of Berlin in 1878 sought to limit the expansion of?

278. ## Psychology

What different tools of psychology help us with work and everyday life situations?

279. ## Hum176

What is comparing and contrast coverage?

280. ## AP Calculus

A function g(x) has the following characteristics: 1) It is rational with a quadratic polynomial in both the numerator and the denominator. 2) It has a removable discontinuity at x=1 and the limg(x) as x approaches 1 is -1/9 3) The graph of g(x) has a

281. ## Math

h(x)=-12x2 -4x+5

282. ## math

simplify (3-9)+(3-8)

283. ## Math

add, simplify if possible. z+r/zr^2 + 8z+r/z^2r

284. ## Science

P: If wave a has an amplitude of 3 meters then inteferes wiht wave b that has an amplitude of 2 meters. the sum of te waves produce wave c with 5 meters Q:what is the wave interaction explain? P

285. ## college bus. law

Hello, I need help writing my short essay. Instructions: IRAC stands for Issue, Rule, Application and Conclusion. When properly answering a legal essay, the writer should clearly identify the legal ISSUE in the fact pattern given. The proper RULE of LAW

286. ## Physics

At a time when mining asteroids has become feasible, astronauts have connected a line between their 3760-kg space tug and a 6100-kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are

287. ## MGT330

Explain how globalization affect the four functions of management. Include specific examples.

288. ## chemistry

How much heat is released when one gram of toluene burned?

289. ## math

89 92 83 96 and 99 what the mean

290. ## Algebra

Steps to factoring this x^3 - 8 ? I'm only used to factoring out the x when the x is in the equation like x^ + x + x

291. ## history

what are 12 good points about king henry viii??

292. ## Physics

A mining operation excavates 5.482x10^4 metric tonnes of ore each hour. In an 12 hour production shift, how much ore is excavated in kg, to 2 significant figures?

293. ## English

1. She has begun English five years ago. 2. She has begun English for five years. 3. She began English five years ago. (Are they grammarical?)

294. ## English

1. Many animals in the woods have been asleep all winter. 2. Birds have been away. 3. Under the snow, the ground has been hard. (In the sentences above, the present participle was used. What does the present participle refer to? Does it refer to