# Questions Asked onMay 3, 2012

1. ## statistics

the life of light bulbs is distributed normally. The variance of the life time is 225 and the mean lifetime of a bulb is 590 hours. Find the probability of a bulb lasting for at most 603 hours. Yeah, WTF??? Why me!??!

2. ## Statistics

According to insurance records a car with a certain protection system will be recovered 89% of the time. Find the probability that 3 of 7 stolen cars will be recovered.

3. ## english

need help on italicized portion of the sentence? 1.The weather remaining turbulent, we will postpone our canoe trip.

4. ## Geometry

Zoe the goat is tied by a rope to one corner of a 15 meter-by-25 meter rectangular barn in the middle of a large grassy field. Over what area of the field can Zoe graze if the rope is 10 meters long? 20 meters long? 30 meters long?

5. ## geometry

A park maintenance person stands 16 m from a circular monument. Assume that her lines of sight form tangents to the monument and make an angle of 47°. What is the measure of the arc of the monument that her lines of sight intersect? Please don't just

6. ## algebra

The triangle and square shown below have the same perimeter. what is the length of one side of the square

7. ## Physics

A 52kg ice hockey player moving at 11m/s slows down and stops over a displacement os 8.0m. Calculate the net force of the skater.

8. ## math

Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions 3a+5b=-19 5a-27b=145

9. ## Physics

A chlorine ion contains 17 protons, 16 neutrons, and 18 electrons. What is the net charge of the ion in Coulomb?

10. ## physics

Two loudspeakers are placed above and below each other and driven by the same source at a frequency of 3.70 102 Hz.An observer is in front of the speakers at point O, at the same distance from each speaker. What minimum vertical distance upward should the

11. ## Physics

Richard stands on the flatbed car of a moving train playing an a on his horn. the note has a fundamental frequency of 220 Hz. Calculate weather or not the train could move fast enough for a stationary observer on the ground to hear the first overtone of

12. ## statistics

The below table shows the probabilities generated by rolling one die 50 times and noting the up face. What is the probability of getting an odd up face? roll 1 Probability 0.22 roll2 probability 0.10 roll 3 probability 0.18 roll 4 probability 0.12 roll 5

13. ## science

Richard stands on the flatbed car of a moving train playing an a on his horn. the note has a fundamental frequency of 220 Hz. Calculate weather or not the train could move fast enough for a stationary observer on the ground to hear the first overtone of

14. ## math

one out of 43 high school ball players plays college ball.one out of 38 college players plays professional ball. what fraction of high school players plays professional ball?

15. ## English arts 1 Nouns

Aaron plans to attend college once he completes this course workbook. im suppose to identify the nouns in the sentence the nouns are Aaron,college,workbook right? im debating on course idk? help lol

16. ## physics- MC QUESTIONS

1. You push a block up a ramp with friction. The block is moving at constant speed ? A) The force you push with is greater than the force of kinetic friction. B) The force you push with is less than the force of kinetic friction. C) The force you push with

17. ## math1

(ii) A factory has two machines. Past records show that the first machine produces 40% of output and the second machine produces 60% of output. Further 4% and 2% of the products produced by the first machine and the second machine were defectives. If a

18. ## Geometry

Three balls are packaged in a cylindrical container. The balls just touch the top, bottom, and sides of the cylinder. The diameter of each ball is 13 cm. a. What is the volume of the cylinder rounded to the nearest cubed centimeter? b. What is the total

19. ## Physics

A chlorine ion contains 17 protons, 16 neutrons, and 18 electrons. What is the net charge of the ion in Coulombs?

20. ## chemistry

for each of the following unbalanced equations how many moles of thr first product are produced if 0.625mol of the second product forms.

21. ## Physics

Given: The universal gravitational con- stant is 6.672 × 10−11 N m2/kg2. Objects with masses of 152 kg and 269 kg are separated by 0.45 m. A 53.5 kg mass is placed midway between them. Find the magnitude of the net gravitational force exerted by the

22. ## hyperbola

the roof of a building is in the shape of the hyperbola y^2-x^2=40 , where x and y are in meters.determine the distans , w , between the walls.

23. ## statistics

a coin is tossed 16 times. What is the standard deviation?

24. ## math

Jill is 20 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 1.5 kilometers per hour. They meet in 5 hours. How fast is Joe walking?

25. ## algebra

a tree 5 ft tall growns an average of 8 in each year, write an ewquation to model the trees height h inches after y years

26. ## Chemistry

Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200 oC in a closed container, 1.1 atm of nitrogen gas is mixed with 2.1 atm of hydrogen gas in an otherwise empty container. At equilibrium, the total pressure is 2.2 atm. Calculate

27. ## English II - Animal Farm

My assignment is to find the human vice that each of the seven commandments intended to prevent in the novel, Animal Farm. First, I do not know what human vice the following two are supposed to prevent: Whatever goes upon two legs is an enemy. Whatever

28. ## MATH

Solve this system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions 2x-y=0 3x+y=5

29. ## Physics

a. A prismatic object 8 cm wide by 16 cm long is weighed in water at a depth of 20 cm and found to weigh 11 N. What is its weight in water? b. A light bulb in flashlight is labelled 2.4 V, 0.7 A. Find the equivalent resistance and the current if three of

30. ## Math(differential equations)

An 8 lb weight stretches a spring 8 feet. The weight is moving through a surrounding medium that has a damping effect equal to the instantaneous velocity of the weight. Initially the weight is displaced 4 feet below the equilibrium position with a downward

31. ## physics

A fisherman's scale stretches 2.8 cm. when a 2.1 kg. fish hangs from it. What will be the frequency of vibration if the fish is pulled down and released so that it vibrates up and down?

32. ## chemistry

how much heat is needed to convert 30 g of water at 10 C to 110 C

33. ## math

marty has saved $72. He spent$8 on a video rental. write a ratio as a fraction in simplest form to srpresent what portion of his savings he has left

34. ## matrix products

The table shows the market prices per pound that a trucker can get for his load of fruit in three cities: San Francisco, Las Vegas and Los Angeles. S.F L.V L.A PEACHES $0.50$0.60 $0.40 APPLES$0.40 $0.80$0.50 The trucker has a load of 5000 lbs. of

35. ## to ms.sue

is there a website where i can take a review test of the test i have heard of a land because i forgot to take my practice book home and tomorrow is the test.

36. ## phisycal sciences

Which of the following properties did Rutherford use in his experiment? A. the negative charge of the alpha particles and the random distribution of protons B. the negative charge of the alpha particles and the positive charge of the gold foil C. the

37. ## chemistry

if CaC2 + 2H2o -> C2H2 + Ca(OH) then how many grams of H2o are needed to react with 483 grams of calcium carbide?

38. ## physical science

a skydiver steps from a helicopter and falls for 5 seconds before reaching her terminal velocity.during this 5 second interval, her acceleration;

39. ## math

A pendulum bob swings 5.0cm on its first oscillation.On each subsequent oscillation the bob travels 2/5 of the previous distance. Find the total distance the bob travels before coming to rest.

40. ## Statistics

The serum cholesterol levels in men aged 18 to 24 are normally distributed with a mean of 178.1 and a standard deviation of 40.7. A group of 9 men aged 18 to 24 randomly selected. 1. Find the probability that there are at least 2 men in the group whose

41. ## math algebra

Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. -a+b=-4 2a-3b=-2

42. ## Physics

The grindstone weighs 80.0 kg, and has a radius of 0.320 m. The coefficient of friction between the axe and the stone is mk = 0.620 m. The radial component of the force of the axe against the grindstone is closest to...

43. ## physics

Light from a 550 nm source goes through two slits 0.040 mm apart, a screen is 1.5 m from the slits. a)what is the angular separation of the of the two first order maxima occurring on the screen? b)what is the distance between the two first order maxima

44. ## English (poetry)

In the poem Kubla Khan by Samuel Taylor Coleridge, how water and ice images are used in the poem. What ideas or feelings are expressed by the poet with this imagery?

45. ## chemistry

which of the following is formed when CH3ONa is heated with C2H5I : 1 dimethly ether 2 ethly methly ether 3 methyl propyl ether 4 diethyl ether

46. ## trig

If x and y are complementary angles and 5 tan x-12=0,calculate by using a diagram the value of 2sin(squared)x+cos y.

47. ## Physics

The grindstone, in the shape of a solid cylinder, weighs 80.0 kg, and has a radius of 0.320 m. The coefficient of friction between the axe and the stone is mk = 0.620 m. The radial component of the force of the axe against the grindstone is closest to...

48. ## social studies

which of the following best illlustrates how a president can use the news media to reach the largest segment of the public?

49. ## physics

A rope of mass 0.78 kg is stretched between two supports 31 m apart. If the tension in the rope is 1800.0 N, how long (in seconds) will it take a pulse to travel from one support to the other

50. ## chemistry

If 34.7 mL of 0.210 M KOH is required to completely neutralize 30.0 mL of a CH3COOH solution, what is the molarity of the acetic acid solution?

51. ## physics

A car (mass = 1100 kg) is traveling at 33.0 m/s when it collides head-on with a sport utility vehicle (mass = 2800 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle

52. ## math

marty has saved 72 dollars he spent 8 dollars write a ratio as a fraction in simplest form to represent what portion of his saving he has f\left

53. ## chemistry

Mg+2 is isoelectronic species with ................ (give 2 species)

54. ## math

rewrite log (10a^(4))/(3b^(3))

124. ## math

a drawing of a deck has a scale of 1 inch to 5 feet. the actual deck is 18 feet long.how long is the deck in the scale drawing?

125. ## Office management

(1) The best reference a potential job applicant can use in a reśumé is a (an) A. Next-door neighbor B. aunt or uncle C. Past teacher D. Former supervisor I choose (C) What would you suggest, could be (D) as well .

126. ## physics

what must an object do in order for the distance it traveled to be the same as its displacement.

127. ## math

a rectangle has the length twice the side of this square and width three units less than the side of this square. if the two areas are equal, what are the squares dimensions (w * h)?

128. ## physics

a horse walks 56 meters in 75 second. what is his average velocity?show the work

Determine an equation for the line parallel to 2x + 6y + 4z = 1 and contains the point P(3, 2, 1).

130. ## physics

a car is driving at 35 m/s when the driver hits the breaks causing the car to accelerate at -5 m/s How long will the car take to stop show your work

3/n + 3/10 =

132. ## Art

Thank you very much for your suggestions. I urgently need your help to check these statements on tennis. 1) The most important tennis shoots are forehand and backhand. These shoots are very important because when the ball bounces you must hit the ball with

133. ## math

For the passengers in the SRS, what is the approximate probability that the mean length of time for them to get through security will be less than 18 minutes?

134. ## Maths

Consider the Ferris wheel above. It has an axle standing 38m off the ground and a radius of 35m. The wheel takes 5 minutes to complete one revolution. The wheel moves in clockwise motion and you are sitting in one of the carriages which are horizontally in

135. ## intro to chemistry (college)

A 64.8 g mixture of the compounds potassium sulfide and calcium oxide is 17.1 % by mass potassium sulfide. The compound calcium oxide is 71.5 % by mass calcium. Calculate the mass (g) of oxygen in the mixture. mass % = mass part/mass whole x 100. I

136. ## algebra 2

Classify the conic section . Write its equation in standard form. 4x^2-y+3=0?

137. ## performing and visual arts

What is another name for Gherardo Starnina? .Master of Bambino Vespo .Gentile da Fabriano .Duccio Buoninsegna .Giotto Bondone

138. ## Geometry

A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory. There are 100 seniors, 150 juniors, and 200 sophomores who applied. Each senior's name is placed in the lottery 3 times; each junior's name, 2

139. ## visual and performing arts

From what Greek philosopher did Abbot Suger draw inspiration? .Aristotle .Socrates .Pythagoros .Pseudo-Dyonysius

140. ## visual and performing arts

Explain why the Chartres Cathedral both is and isn't an example of the "High Gothic" style. Be sure to reference specific pieces of art in your response.

141. ## Math

What is the larger root of the equation y^2+4y-21=0

142. ## analyzing a poem!

The eye is drawn to that single yellow star that no wise man will follow. The hunched men in caps, the grimacing woman her eyes screwed up, cheeks hollow. We look and look again until we burn a hole in the paper. We strive to learn from their resignation

143. ## Math

What is the larger root of the equation y^2+4y-21=0

144. ## Science

Living organisms animals

145. ## Foreign languages

Can you check these last sentences on the same theme? Thank you very much, Writeacher. 1) The server always calls his score first. If the server wins the first point, he gets a score of 15. The second point is called 30. The third point is called 40 and

146. ## math

proportions 4/21=x/168

147. ## math

In sample of 1000 TV viewers, 330 watched a particular programme. Find 99% confidence limits for TV viewers who watch this programme .

148. ## physics

A ball droppred from a tall building find the balls velocity after 7 seconds show all works please

149. ## physics

A ball its thrown straight up into the air at 50 m/s find the balls velocity after 8 seconds show all work please

174. ## MATH

CAN 1/2 EVER BE GREATER THAN 1/4. IF NOT THEN WHY?

175. ## Statistics

Assume X~N(1.2, 1.3). Find P(0.26

176. ## Chemistry-Conversions

Can you please show me how to set up these conversions (how to do each of these conversions) Question- The pressure of gas is measured ay 550 mm Hg. Calculate the pressure in: a. Torr b. lb/in2 c. atm d. in Hg Can someone other than DrBOB answer this

177. ## math

how do you change seventy-two ninths into a decimal

178. ## health

what smoking bans were put in place between 1964 and 1988

179. ## MATH

Convert two point six eight to a mixed number?

180. ## Math Models

Are the functions y-5=6(x-3) and y=6x-13 equal?

181. ## math

y=1777x+27,153 number of y guns after 2000, that is x=0 coorespod to 2000, x=3, 2003 x=4. Predict number of gun deaths in 2004, 2009 and what year of gun deaths will be in 7606.

182. ## Math

How do you solve: log2(x-1)+log2(x-2)=1 I got up to x^2-3x=0 Is it no solution or does it become x(x-3)? Thanks!

183. ## Math

Linear equations using matrix method 2x-4y=0 3x-2y=3

184. ## chemistry

Enthaly definition

185. ## to bobpursley

if i was going on the same web you gave me and i wanted to study there,but if its a different book, what do i type in?

186. ## Art

I need to let you check a few things later. I hope you'll be there, Writeacher. 1) I need your help for a project work on Emily !@#\$%^&inson and the theme of anorexia. Could you suggest one of her poems? 2) I also need your help to find a short description

187. ## Energy

Hi guys can someone help on energy like give me a few bulletpoint about it please

188. ## biology

The Cell membrane contains A) a double layer of fatty acid tails and phosphate heads B) cholesterol C) protein channels or pores D) a and b E A,B, and C

189. ## math

1/2 life of R 226 if A(t)=600e^-0.00043t i got stuck A(t)=A(t)=600e A(t)=600/2=300 300=A(t)=600e

190. ## Math

How do i solve 2x+y > -3? And how do i graph it. This is Linear inequalities.

191. ## statistics

Suppose that a given population of trees have an average height of 10.2 ft and a standard deviation of 1.3 ft. Find the proportion of the population with heights above 11.8 ft.

192. ## 3 grade english ms sue

sequence the sequence in a story is the order in which events happen. clue words such as first,next,then,and finally,are often used to signal the sequence in a story. dates and times can also be clues. sometimes,no clue words are used at all. directons

193. ## geometry

how to write an equation in slope intercept form of the line through point P(8,20 with slope 4?

194. ## 3rd grade math help

which one has two right angels square trapazoid rectangle or parrallegram??

195. ## geology

I need help with this question... why air released from a tire or spray bottle can cool its surroundings?..thanks

196. ## math

i am a 2 digit number between 0 and 30 my two digits add up to 1 what number am i

When is the best time to read review the discussion questions?

198. ## math

what does it mean when it says name for negative numbers greater than -3

199. ## HIS-103

Discuss the early complex society

200. ## math

√x^5/√x^2 change to exponential notation, then simplify. assume it is positive.

201. ## math

underoot 2x square +3x + underoot 2 by alpha into beta method.

202. ## physics

a kangaroo goes 150 feet at 5ft/second how long does this take him.

203. ## physics

giraffe walks at 5mph for 3hours.how far does he go?

I had to change these into the past tense preterite are they correct tú presentarse would it be tú presentaste él sentirse would it be él se sintió

205. ## DATA HELP!!

Estimate the population size of a bird species if in 100 sightings along a migration path, 25 were ringed, and it is known that 500 of the birds had been ringed before the sightings?

206. ## chemistry

how many grams of sodium phosphate were dissolved in 382 grams of water in a 6.0 m solution

207. ## physics

roy is going for a jog! a)he leaves his hours and goes east at 4m/s for 5second,then b)he realizes he lost an eye contact so he begins crawling at 2m/s for 10second c)then he gets tired and stops for 3second d)then he goes back toward his house at 4m/s for

208. ## physics

A car rolling at 18m/s when the driver hits the breaks after 5 seconds the car has slowed down to 3m/s find the cars acceleration you most write down all given information and show all work WHat does this acceleration tell us about the motion of the car?

209. ## Physics

The total charge in an electrical circuit as a function of time is given by q=t/t^2+1 coulombs. Find the maximum charge q. Please provide your reasoning.

Determine an equation for the plane that contains the points A(6, 2, 3), B(5, 1, -3), and C(5, 7, -2).

211. ## physics

A car speed up from 18m/s to 34 m/s in 2 seconds A) find the cars acceleration must write down all given information and show the work B) What does this acceleration tell us about the motion of the car?

212. ## chemistry

what will be the boiling point 54.5 grams of aluminum sulfate dissolved in 805 grams H2O

213. ## PHYSICS

A car speeds up at 5m/s if the driver was already moving at 7m/s find his velocity after 3 seconds

214. ## physics

A ramp causes a ball to accelerate at - 4 m/s the ball is rolled up the ramp at 13 m/s find the ball velocity after rolling for 6 seconds you must show your work

215. ## physics

A ball is dropped from a tall building What is its acceleration What does the acceleration tell us about the velocity of the ball

216. ## math

train A and train B traveling same direction. train A passes station 9:20, train B passes station 9:32, when will train B catch train A

217. ## Chemistry

A tank contains Ar at 1.33 atm and Kr at 3.59 atm. We add enough Xe to give a total pressure of 6.3 atm. What is the partial pressure of the Xe?

218. ## Life Orientation

Environmental problem

219. ## physics

Eric can you show the work please

220. ## math

17. Estimate 21,174-12,951 by first rounding each number to the nearest thousand.