1. proprotions

why did the envelope lose the race with the cardboard box?

2. Chemistry

Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 10-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.40 L of 0.425 M Na2S2O3? Ag+ reacts with S2O32- to form a complex ion. Ag+(aq) + 2

3. physics

A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m is thrown down the lane with an initial speed of v = 8.9 m/s. The coefficient of kinetic friction between the sliding ball and the ground is ¦Ì = 0.34. Once the ball begins to roll

4. math/ratios

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?

5. alg 1

the length of a rectangular garden is 8 feet longer than the width. The garden is surrounded by a 4-foot sidewalk. the sidewalk has an area of 320 square feet. find the dimensions of the garden. please help

6. Chemistry

Calculate the pH at the equivalence point for the titration of 0.130M methalamine (CH3NH2) with 0.13M Hcl. The Kb of methyl amine is 5.0x10-4.

7. World History (Ms. Sue)

What was Lincoln's reasons for not emancipating slaves when the war began? My answer: Lincoln did not believe he had the power under the Constitution to abolish slavery where it already existed. Nor did he want to anger the four slave states that remained

8. Cultural Anthropology

In a band society, who would most likely be responsible for punishing a murderer

9. Algebra

A bag holds 2 yellow, 1 green, and 2 red marbles. If you were to draw a marble from the bag 150 times, and replace it after each draw, how many yellow marbles would you expect to draw? A.50 B.60 C.30 D.120 I think it is B...?

10. Algebra

a and b are positive numbers that satisfy the equation \frac {1}{a} - \frac {1}{b} = \frac {1}{a+b} . Determine the value of \frac {a^6}{b^6} + \frac {b^6} {a^6} .

11. Physics

A test charge of +3.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?

12. Algebra

If you rolled a number cube 100 times, how many times would you expect to get an even number? A.25 B.75 C.50 D.38 I think it is C...?

13. math

How do you solve: imgur[dot]com/PlcCL8s [I had to upload cause its impossible to write proper notation here.

14. algebra

What is the probability that a month picked at random will have 31 days? A.5/12 B.4/12 C.7/12 D.8/12 I think it is C...?

15. Englsih II

Review the poems we have studied in this unit and select the one that appealed to you most. Analyze the poem by answering the following questions. Cite specific lines or phrases from the poem to support your ideas. Be certain to identify your poem by both

16. Maths-Query

An NGO is helping the poor people of earthquake hit village by providing medicines. In order to do this they set up a plant to prepare two medicines A and B. There is sufficient raw material available to make 20000 bottles of medicine A and 40000 bottles

17. geometry

in the accompanying diagram, RST is a right triangle, SU is the altitude to hypotenuse RT, RT=16 and RU=7

18. Chemistry

Calculate the molar concentration of uncomplexed Zn2+ (aq) in a solution that contains 0.22 mol of Zn(NH3)4 2+ per liter and 0.3109 M NH3 at equilibrium. Kf for Zn(NH3)4 2+ is 2.9 X 10^9 I started this way... (0.3109 + 4)2/0.22-x)= 2.9 X 10^9

19. Algebra

There are 5 different cookies in a bag. One of them is your favorite, chocolate chip. What is the probability that you will not get your favorite? A.1/5 B.2/5 C.24/25 D.4/5 I think it is D...?

20. Math

Frank has 3 nickels, 5 dimes, and 2 quarters. What is the range, mean, median, and mode of the values of Frank's coins?

21. algebra

1.You flip a coin 30 times and get heads 11 times, so the chance of getting heads is 11/30. Is this an example of theoretical or experimental probability? theoretical experimental * 2.You have made 3 out of 10 of your last free throws. How many free throws

22. Algebra

You roll a pair of number cubes and then flip a coin. Is this an example of independent or dependent events? A.independent B.dependent This is A...right?

23. Algebra

A bag has 6 green marbles, 4 red marbles, 5 yellow marbles, and 3 purple marbles. What is the probability of choosing a purple marble? A.1/6 B.6/18 C.3/20 D.1/9 My choice is A

48. 11

A ball is dropped vertically from height of 30 meters after bounces.The ball reaches a max height to 60% of height of the previous bounce. What are the terms of the sequence. What is the height to the nearest tenth of a meter of the ball after the tenth

49. Chemistry

A 8.5 x 10^-3 M solution of acetic acid is 4.6% ionized at 25 degree Celsius. in a 8.5 X 10^-4 M solution, the percentage of ionization would be? A.the same B.>4.6% C.

50. Physics

A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 81.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the

51. chem

Indicate whether the pH increases, decreases, or remains the same when each of the following is added. (CH3NH3)Cl to a solution of CH3NH2 pyridinium nitrate, (C5H5NH)(NO3) to a solution of pyridine, C5H5N sodium formate to a solution of formic acid how do

54. physics

An aluminum wing on a passenger jet is 38 mlong when its temperature is 23°C.At what temperature would the wing be 2 cm (0.02 m) shorter?

55. maths-surface area

Cylindrical groove is made in a cylindrical piece of wood of length 17.5cm. The groove is filled with graphite and the cylindrical graphite block is of same length as that of wooden piece. If the diameter of the graphite cylinder is 3mm and outer diameter

56. proportions

a locomotive is 58 ft long and 11 ft wide.a special effects designer makes a model that is 20 in. long. how wide should it be?

57. physics

Why projectiles launched at complimentary angles have the same range?

58. English

hans uses a wheelchair. although he has a ramp to get in his house, he finds it difficult to get his wheelchair chair up the ramp. which modification would make it easier for hans to get in his house? a. increase the length of the ramp b. increase the

59. college physics

If a girl drops a coin into a wishing well. After exactly 5 seconds she hears it splash into the water. How fast was the coin going after 1 second? After 2 seconds? How fast was the coin going when it hit the water? How far down is the water? Could you

102. Cultural Anthrolpogy

Anthropological research has demonstrated that supernatural beings and forces exist in what percentage of the world's cultures? A. 50 percent B. 80 percent C. 95 percent D. 100 percent My answer: C

103. English

1. What are you able to do? I am able to play the violin. 2. What are you able to play? I am able to play basketball. 3. What are you able to do well? I am able to dance well. 4. What are you able to play well? I am able to play this computer game well?

104. Physics

A physics teacher (mass = 84.5 kg) is jogging through the woods and runs straight into a large oak tree at 3.5 m/s. Rebound speed is measured at 2.3 m/s in the opposite direction. If the time of contact with the tree is 45 milliseconds, what is the

105. U.S. History

What occurred at My Lai? A.Vietcong guerrillas surrendered. B.U.S. forces suffered a crippling defeat. C.Vietnam became unified under one flag. D.American soldiers killed hundreds of Vietnamese civilians. I think it is D...?

106. Chemistry ....help

If NaNO3 is cooled from 70C to 10C ; how much solid NaNO3 will come out of solution as a solid salt? Help me !!!

107. physics

An ore car of mass 36000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 21 m lower vertically, is a horizontally situated spring with constant5.1×10^5N/m.The acceleration of gravity is 9.8 m/s^2. Ignore friction.

108. urgent maths pls

A goat is tied at point A with a rope of length(L). How long can L be so that the goat can feed on exactly half of the field if the field is a circle.

109. physics

Calculate a person's hang time if he moves horizontally 2 m during a 1.39 m high-jump.

110. Rhts

If 13sinx+5=0 and x[0;270],determine witout the use of a calculator,the value of sin2x

111. Algebra

3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

112. Math

Do you think regular or irregular polygons are used more frequently in the design of objects and buildings in the world???

113. probability math

bill is on the school archery team. the target has a center bull's-eye and two rings around the bull's-eye. the table gives the probabilities of each outcome. what is the probability that bill will get the next arrow in the inner or outer ring?express your

114. math/ratios

There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?

115. math

Give an example of a logarithmic equation that cannot be solved and explain why it cannot be solved.

143. Language Arts

what kind of behavior were greek myths meant to encourage? i think it is mainly to discourage selfishness and greed.

144. AP Chemistry

What mass in grams of sodium hydroxide is produced if 20.0 g of sodium metal reacts with excess water according to the chemical equation? 2Na(s)+2H20(l)=2NaOH(aq)+Hs(g) How many moles of Ag can be produced if 350. g of Cu are reacted with excess AgNO3

145. LAN

1. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for

146. Chemistry

the hydronium ion concentration of a 0.050 M solution of a weak acid is 5.9 X 10^-3 M. the acid-dissociation constant is 1.37 X 10^-4 at 25 celsius. what is the pH of this solution? A. 0.077 B. 1.30 C. 2.23 D. 3.86 E. 5.13

147. Math

The volume of a cylinder is given by formula V= pi(3.14) r^2h where r is base radius and h is height a) the height of a cylinder of radius 5cm and volume 500. Cm^3 B) radius of base of a cylinder of volume 300 cm^3 and height 10 cm Our teacher didn't

148. geography

1. Bolivia is pretty isolated--why? 2. Columbia has an important resource--what is it, where is it? 3. Brazil has many resources--where are they? Access? 4. Why is Brazilia a forward capital? 5. What is Cuba's access? Why does the US have a trade embargo

149. physics

A Softball is Thrown at an angle of 45 degrees with the horizontal. It leaves the hand 2m above the ground. Its Initial Velocity is 20 m/s . Neglecting all external resistance, how far would it travel ? The point at which it hits the ground is at the same

150. Accounting 202

Tse does not want to give Towry this budget without making constructive suggestions for steps Towry could take to improve expected performance. Write a memo to Towry outlining your suggestions.

151. math

There are 3 pitchers of juice. Each student will be served ^ of the juice in a pitcher. How many students will get juice? l a. Draw lines on the pitchers to show how many students these pitchers will serve. b. Write a number model to describe the problem.

152. Physics

A set of crash tests consists of running a test car moving at a speed of 12.2 m/s (27.3 mi/hr) into a solid wall. Strapped securely in an advanced seat belt system, a 75.0 kg (165 lbs) dummy is found to move a distance of 0.630 m from the moment the car

153. math

Hi, This is the third time I posted this because it wasn't answered by anyone. PLEASE help. I think the first part is correct but I am not sure if the V=lw10 is correct. I got 10 for the number of cubes. Here is the question There is a picture with stacked

154. Spanish

Please help me. I only want to know if I've answered these correctly thank you. 1)¿De quién es ______ suéter? A. este C. su B. esta D. esos I said the answer is A. 2)_____,¿cuánto cuestan estos tenis? Treinta pesos. A. Cuestan C. Hace dos días B.

155. math

I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

156. Physics

A 10 g bullet is fired horizontally into a 1 kg block of wood hanging from a 1 m long string attached to the ceiling, getting stuck in the block. Due to the impact, the block then swings on the string to a maximum angle of 60 degrees with respect to the

157. Englsih II

Choose one of your problems (or any one from the two lists) and develop it into an organized theme in the text box provided below. There is only one assignment in this submission, but it has four steps. I. Create a broad outline, i.e., Title, Introduction,

158. Trignometry

ABCD is a square where M and N are midpoints of AD and CD, respectively. If sin∠MBN=a/b, where a and b are coprime positive integers, what is the value of a+b?

159. math

A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are (8 2 )=28 such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been marked as the midpoints?

160. college physics

for the resonance frequencies: fn=nv/2L If the speed (v) doubles my fn will also doubles ? why?

161. chemistry

Construct the correct structure for AsClF42-. Please construct the molecule such that the dipole is oriented vertically up or vertically down. - Name the type of hybrid orbitals the central atom forms. - Name the molecular geometry of the compound. - State

162. ....

in the digestive tract, mouth is to bolus as a. stomach is to chyme b. gallbladder is to insulin c. small intestine is t carbohydrates d. esophagus is to peristalsis

163. Science

Need help on the question below... Which is the warmest climate zone? A. Arctic Zone B. Temperate Zone C. Tropical Zone D. Intermediate Zone Thanks :)

164. Chemistry

I could use some help please. Ammmonia, NH3, can be made by reacting Nitrogen with Hydrogen. N2+3H2=2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react eith enough N2? Thank-you in advance for any help

165. Chemistry

Question 2 Marks: 2 How many grams of oxygen gas must react to give 174.3 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

166. Chemistry

why is it important that the equations be balanced when performing mass-mass stoichiometry problems?

167. physics

A SUPPOSED TREASURE OF OLD SILVER JEWELRY IS UNCONVERED. a.02M^3 BOX OF THE "OLD JEWELRY" HAS A MASS OF 177KG.IS IT R EALLY OLD SILVER? IF NOT WHAT IS IT?

168. Trigonometry

Let N be a 5-digit palindrome. The probability that N is divisible by 4 can be expressed as \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?

169. Algebra

3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

170. physics

Show that the energy-momentum tensors for electromagnetism and for scalar field theory satisfy the dominant energy condition, and thus also the weak, null, and null dominant conditions. Show that they also satisfy w>-1

171. math

I asked the following the other day and received the following answer: Posted by Matthew on Sunday, March 17, 2013 at 11:03pm. A quantity of oxygen gas had 16.32 g of the radioactive isotope oxygen-19 in it. When measured exactly 10 minutes later, the

172. math

A publisher prints and sells both hardcover and paperback copies of the same book. Two machines M and N are needed to manufacture these books. To produce one hardcover copy,machine M works 1/6 hours and N works 1/12 hours. For a paperback copy M and N work

173. biomechanics

A Softball is Thrown at an angle of 45 degrees with the horizontal. It leaves the hand 2m above the ground. Its Initial Velocity is 20 m/s . Neglecting all external resistance, how far would it travel ? The point at which it hits the ground is at the same

174. College Math - Probability

Briefly summarize the experimental design for deciding whether a proposed treatment should go on for further study. Note where independence came into play. If you were more conservative and reject the treatment only if the probability that it is 30%

175. Chemistry

A 20.0mL 0.3M HCl solution is titrated with 0.4M NaOH. What is the exact pH of the solution before titration? And what is the pH at the equivalence point?(are there any straightforward formulas to use on this kind of problem?)

176. Math

Precalc (1+i)^3 and the cube root of 8i

177. college physics

If I travel to Mexico and buy a 55g gold braclet for 20 dollars and take the braclet and submerge it in water starting out with 50cc and after it is submerged in the water it is 52.8cc. What is the buoyant force on the braclet? I also need to know if the

178. Biology

To take the energy from an exergonic reaction and use it to power an endergonic reaction, a cell can: create the energy for the endergonic reaction to occur. Why is this false? I thought a exergonic reaction create energy for the endergonic reaction to

179. science

in the digestive tract, mouth is bolus to a. stomach is to chyme b. gallbladder is to insulin c. small intestine is to carbohydrate d. esophagus is to peristalsis

180. College Mathematics

Counting Principles and Permutation. A social security number consists of 9 digits. How many different social security numbers are possible if repetition of digits is permitted

181. English

Should I use a comma or colon after as in this sentence? The sentence is not complete that I posted here I have learned many things in this class I will list a few such as different writing styles, write descriptive paragraphs,

182. Social Studies

Why did the Spanish Colonists leave Florida to go to Cuba?

183. Economics

. How could free Media Player software (either bundled or downloaded with windows) possibly harm consumers?

184. English

The team ______ won the game is my favorite. which word correctly completes the sentence above? a. which b.whom c. who d. that

185. Physics

Water flows through a pipe of radius 4 cm at a rate of 3.5 m/s. Suppose each water molecule is singly ionized (highly unrealistic). What is the electric current density associated with the flow of these ions? What is the electric current in the pipe?

186. Physics

Electric charge flows through a wire, which naturally has a cylindrical cross section. Suppose the charge has a current density given by J = A/r, where A is a constant and r is the distance to the wire's central axis. How much current flows through the

187. math 140

The math scores of a math test for five students were posted on the bulletin board. The students' names are Rod, Penny ,Jake, and Fred. Rod and Fred scored the same number of points. Penny did not get the highest score. John's score was 5 points lower than

188. math

Two angles between 0 degrees and 360 degrees have a tangent undefined. What are the angles? Why is the tangent undefined for each of those?

189. math

A sequence is generated by the recurrence relation Ur+1 = 1/Ur -3. Given that U2 = U1 find the possible of U1

190. math 140

A football team gained 12 yards on one play, lost 40 yards on another, and gained 34 yards on the last play of the first half. They had already gained 345 already during the half. What was the total yardage gain for the first half?

191. Quantum Physics

Let |\psi\rangle=\frac{1-i}{2}|0\rangle-\frac{1+i}{2}|1\rangle and |\phi\rangle=\frac{2+i}{3}|0\rangle-\frac{2i}{3}|1\rangle. What is \langle \psi\,|\,\phi\rangle? Please tell the ans...

192. chemistry

Which of the following combinations of atomic orbitals can combine to form sigma bonds? s-s ,s-p, p-p ,hybrid orbital - hybrid orbital ,hybrid orbital - s ,hybrid orbital - p

193. Algebra

1. Simplify the expression: (x^3*y^5) (-y^7) 2. Write the expression in radical form: (125x)^1/3

194. math

The crater is circular and has a radius of about 0.4 mile. About how many square miles does this crater cover. Use 3.14 for pi answer my 1.256square am i correct

195. Math

Is the opposite of 0 still 0 or does 0 have no opposite? Thanks...

The strongest recorded earthquake in the world took place in Chile on May 22 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22 1949 and occurred off the Queen Charlotte

197. chemistry

A student extracts 6.3 g of water when performing the following combustion: C2H8 + 4O2 --> 2 CO2 + 4H2O If the theoretical yield is 8.6, what is the percent yield?

198. Chemistry

Question 2 Marks: 2 How many grams of oxygen gas must react to give 174.3 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

199. Chemistry

Question 2 Marks: 2 How many grams of oxygen gas must react to give 174.3 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

200. math

How do I do this? Without a calculator, determine two angles between 0 degrees and 360 degrees that have a cosine of negative square root 3 over 2.

201. Chemistry

How many grams of zinc must react to give 13.0 grams of ZnO according to the balanced equation. 2 Zn(s) + O2(aq) --> 2 ZnO(s)

202. chemistry

5:8 emperical formula with hydrogen and carbon

203. POLITICAL SCIENCE

describe the European origins of American conservative and liberal ideologies. Then, explain how these two American ideologies have evolved from their European origins, and the key features of each American ideology today. Do “Tea Party” beliefs neatly

whatever you can do or dream you can, begin it. Boldness has genius, power and magic in it !" describe in 25 word what the author is saying.

205. stats.

The mean number of bumped airline passengers per day is 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean of bumped passengers for the 40 days will be between 1.25 and 1.50?

206. Propability

Briefly summarize the experimental design for deciding whether a proposed treatment should go on for further study. Note where independence came into play. If you were more conservative and reject the treatment only if the probability that it is 30%

207. World History (Ms. Sue)

Why did black soldiers often face greater hardships that white soldiers? My answer: They face greater hardships because of the color of their skin. They were often given menial jobs, lower pay, and worked under white officers. They were organized in

208. English

Write 10 sentences of subordination. Write 2 sentences for each of the following subordination. For each subornator, one sentence must begin with the subordinator; the other sentence will have the subordination in the middle. Watch punctuation.

209. English

1. He worked hard to be a best baseball player. 2. He worked hard to be the best baseball player. (which one is right? Do we have to use 'a' or 'the'? Do they have a different meaning?)

210. math

find the inverse function of h ^-1(x)

211. Physical Science

The transfer of heat that takes place because of the density difference in fluids is

212. geometry

Consider the region in Quadrant 1 totally bounded by the 4 lines: x = 3, x = 9, y = 0, and y = mx (where m is positive). Determine the value of c such that the vertical line x = c bisects the area of that totally bounded region. Needless to say, your first

213. logirythms

1/2LOG(x-1)-3LOG(X+4)

214. urgent pls education

Assuming in your class,you have noticed that a particular child who is an adolescent has suddenly become withdrawn,discuss how you are going to help such a child???

215. Trigonometry

using csc = 3.75, solve for sides: a= 3 b= ? c= ? and the remaining five trigonometric functions: sin= (1/3.75) cos= ? tan= ? sec= ? cot= ? *b is not 1; and c is not 3.75

216. Math

Teo rectangles with dimensions 8cm by 10cm and 9cm by 12cm partly cover each other(see the diagram). the grey area 37cm2. what is the area of the shape marked by dots? How can I upload diagram?

217. algebra 1

write a quadratic functions for graph that has an axis of symmetry of x= -3/2. summarize your steps.

3.7^2

220. calculus

A publisher prints and sells both hardcover and paperback copies of the same book. Two machines M and N are needed to manufacture these books. To produce one hardcover copy,machine M works 1/6 hours and N works 1/12 hours. For a paperback copy M and N work

221. math

in triangle ABC ,D and E are the midpoint of line AB andAC resp.angle A=angleB=angleC=angleD=60° DE=5cm find the perimeter of triangleABC.

222. math

A bookshop had 60 boxes of pencils. Each box contained 85 pencils. Half of the pencils were packed into packets of 25 pencils and the rest were packed into packets of 20. How many packets of pencils were there altogether? My answer is 229 am i right? How

223. English

Hello. Thank you for all your answers. I'd like to clarify my previous question. Do you think it's OK to use "before" in the context: "The kids will not calm down before I buy this toy"? (Meaning: the kids will behave normally / will stop being naughty

224. Physics

What is the gibbs free energy for the reaction a)temperature b)800 degrees celsius c)comment on whether the reactions are spontaneous or not (CHEMICAL REACTION) deltaH = -100kJ delta S= -200 J/K

225. math

2log_3(9) solve

226. math

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg)?

227. Math

How many liters of coke are there in 100 cans if each can contain .385 liters of coke? Round your answer to the nearest liter.

242. Physics

A golf ball with a mass of 50.3 g can be blasted from rest to a speed of 72.1 m/s during impact with a club head. Assume that the impact lasts only about 0.910 ms. Calculate the change in momentum of the ball. Calculate the average force applied.

243. math

the letters g and g stand for numbers. if g + 9=h + 9, what is true about g and h?

244. Math

If someone is renting a truck that has a 40 gallon tank and it gets 10 miles per gallon and they are traveling 252 miles, what will they pay for gas for the trip?

245. Chemistry

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

246. DES

A rock is being pushed by a stream with 30 N of force. The rock has a static friction of 40 N and a sliding friction of 20 N. Does the rock move?

247. Physics

Suppose that each of the three masses in the figure below has a mass of 5.50 kg, a radius of 0.0700 m, and are separated by a distance of 10.5 m. If the balls are released from rest, what speed will they have when they collide at the center of the

248. Math

Carmen bought 20 apples to make cider. If each apple has a mass of 18 grams, how many milligrams of apples did she buy?

249. Life orientation

What, according to the basic conditions of emplyment act applies with regard to the contraventions that you've identified?

250. Physics

Jake has a mass of 88.0 kg and is zooming along in a 110.0-kg bumper car at 9.4 m/s. He bumped Allen's car, which is sitting at rest. Allen has a mass of 88.0 kg. After the elastic collision, Jake continues ahead with a speed of 3.2 m/s. How fast is

251. vmps

ABCD is a square where M and N are midpoints of AD and CD , respectively. If sinÚMBN=a b , where a and b are coprime positive integers, what is the value of a+b ?

252. math

Prove. 3/(log_2 (a)) - 2/(log_4 (a)) = 1/(log_(1/2)(a))

253. pre cal

what is the period of these functions y=1/2 cos 3pi/2 y=2 cos piX/2

254. statistics

If you estimate a model y=a + b * x, where the dependent variable Y is measured in billions of dollars and your predictor variable X is measured in percent then "A" represents what?

255. Math Geometry

A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are (8) (2) =28 such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been marked as the

256. QSO 510

During the dinner hour, the distribution of the inter-arrival time of customers at a restaurant is estimated to be as shown below. The mode of payment and the service times of the cash and credit card customers are shown in the following tables. Complete

257. easy algebra!

C(x)=x^2−20x+111 represents the total cost, in dollars, to produce x gallons of paint. How many gallons of paint should be produced to minimize the total cost?

258. geometry

A triangle has side lengths of 6, 8, and 9. What type of triangle is it?

259. number theoRY!!!

How many integers appear in both of the following arithmetic progressions: A1: 2, 9, 16,.....2+(1000-1)*7 A2: 3, 12, 21,.....3+(1000-1)*9 Since 2 appears in A1 but not in A2, it does not appear in both of the arithmetic progressions.

260. Algebra

A is a 2 by 2 matrix. Given that A=(5 1) (1 5) , what is the value of det(A)? det(A) is determinant of A

261. Quantum Physics

Consider the following quantum circuit: bit.ly/Zlrijv (a) What quantum state do you have to input in order to get output |00>? (b) What quantum state do you have to input in order to get output |11>? (c) What quantum state do you have to input in order to

262. 140

Tom and Andy find a long drainage pipe in a vacant lot. It is big enough so that each boy can just manage to squeeze into it and crawl from one end to the other. If Tom and Andy go into the pipe from opposite ens, is it possible for each boy to crawl the

263. Trignometry

Let m and M be the minimum and maximum values of the domain of f(x)=sin^−1(x2−35), respectively. What is the value of M−m? sin^-1 is sin inverse

264. Limit Math

Evaluate lim x→∞ 2x/(√(x^2+3)-4) in words 2x divide by(root(xsq +3) -4)

288. frese

Sonya owes mark $5.00. Clair owes Mark$ 4.00 Who owes Mark more money?

289. chemistry

define elements, compound and molecules.

290. calculus

A publisher prints and sells both hardcover and paperback copies of the same book. Two machines M and N are needed to manufacture these books. To produce one hardcover copy,machine M works 1/6 hours and N works 1/12 hours. For a paperback copy M and N work

291. Algebra

Find the value of p such that (–6, 3) is the midpoint of the points (-9, -1) and (–3, p).

292. zoology

Where can I get detail information about "african giant land snail"?

293. Math

How do you do a factor tree for the lcm? I don't get it. (Or GCF)

324. political science

what is ''reasonable search''?

325. college algebra

I need help bad. Don't know which formula to use. Please explain step by step. 2x^2-12x+19. Find the interval where f is increasing and decreasing.

I need to make like a newsworthy story but it has to be graphic.. like a bar graph.. it has to be on something job related on something in my Town of Kalamazoo. Does anyone have any ideas what I could research and do my bargraph on?

327. Math

a contractor's designing one side of an office building 48 feet in length the windows are each 5 feet long and will be placed Six feet apart and 5 feet from the end of the building wall how many windows can a contractor design

328. help?

find the altitude of an equilateral triangle if a side is 6 mm long.

329. English

Hello. Will you please tell me if inversion is possible in the following context: "Many people came to Mary's party yesterday. There aslo was (?) Peter, Jack's cousin." Thank you so much for your help!

330. MEDICAL

inj RL 60 ML/HR AND INJECTION NS 60 ML/HR IV INFUSION TO BE CONNECTED FOR A PATIENT WITH GE . HOW MANY ML PER HOUR YOU WILL ADMINSTER?

331. Life orientation

How should discrimination in the work place be dealt with?

332. math

find three sets of values for x and y to make x mi/y min= 4 mi/ 32 a proportion.

333. physx!!!!

The combination of the force of gravity and my hand provide a net force of 40 N on a ball straight up. The ball accelerates at 100 m/s^2 while it is in my hand. What is the mass of the ball in kg?

334. math

I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

335. math

find three sets of values for x and y to make x mi/y min= 4 mi/ 32 a proportion.

336. pre cal

what is the period of these functions y=1/2 cos 3pi/2 y=2 cos piX/2

337. math

find three sets of values for x and y to make x mi/y min= 4 mi/ 32 a proportion.

338. pre cal

what is the period of these functions y=1/2 cos 3pi/2 y=2 cos piX/2

339. physics

Sally sells seashells by the seashore. In the morning, her sack of shells weighed 70 N. She sold seventy shells and in the evening her sack weighed 7 N. What was the average mass in kg of the shells she sold? The acceleration of gravity is −9.8 m/s2.

340. math

How much paper is used for a label on a can of frosting. The height of the jar is 5 inches and the radius is 1.5 inches I did SA=2TTrh+2TTr^2 SA=2TT1.5(5)+2TT1.5^2 SA=15TT + 2TT2.25 SA=15TT=4.5TT SA=19.5TT SA=61.261 SA=61.3in^2 61.3in squared of paper was

341. Trigonometry - finding cos 36 given cos 72?

Please help, I know cos 72 degrees = (sqrt 5 - 1)/4. I need to know what cos 36 degrees is. How to do so?

342. Algebra

The function f(x)=x^4−10x^3+40x^2−80x+64 has four complex roots, one of which is 2−2i. What is the sum of all real and imaginary coefficients of these roots? i here is imaginary unit i.e. i^2 = -1

343. Trignometry

The angles in triangle ABC satisfy 6sin∠A=3√(3)sin∠B=2√(2)sin∠C. If sin^2∠A=a/b, where a and b are coprime positive integers, what is the value of a+b?

344. Quantum Physics

a) What is QFT6 of 1/√2(|0>+|3>)? b) What is QFT6 of 1/√2(|1>+|4>)? c) What is QFT6 of 1/√3(|0>+|2>+|4>)? d) What is QFT6 of 1/√3(|1>+|3>+|5>)? Answer like: a) |0> = ; |1> = ; |2> = ; |3> = ; |4> = ; |5> = ...

345. math

solve and graph 4x+3y=6

346. Slope Maths

What is the slope of the line tangent to the quadratic f(x)=4x^2−3x+6 at x=7?

347. Math

Please help Ms.Sue! a contractor's designing one side of an office building 48 feet in length the windows are each 5 feet long and will be placed Six feet apart and 5 feet from the end of the building wall how many windows can a contractor design

348. Algebra

How many positive integers n≤1000 cannot be written in the form a2−b2−c2 where a,b and c are non-negative integers subject to a≥b+c?

349. math

Find the height of a triangle with a base of 24 ML and an area of 66 square. My answers is2.75 am i correct. Thanks

350. writing

My 5th grade year was coming to a close and I, personally, was really looking forward to summer. Two months of sleeping in late and doing whatever. How would I write this...

351. English

Hello. Please help me with the language problem. Do you think it's possible to use "before" in the following context: "The kids will not calm down before I buy this toy"? Thank you very much for help.

352. math

. Find the roots of the polynomial equation. x2 + x undefined 72 = 0 (Points : 1) 9 and 8 6 and 6 2 and 16 9 and 8

353. Life orientation

describe the course of Ap chdmistry

354. simple queston

what is -430 in scientific notation?

355. Algebra

We define n♡ recursively as follows. 1♡=1; n♡=((n−1)♡)⋅n+1 Find the largest n

356. Algebra

Let S(N) denote the digit sum of the integer N. Let M denote the maximum value of N/S(N), where N is a 3-digit number. How many 3-digit numbers N satisfy N/S(N)=M? The digit sum of an integer is the sum of all its digits. For example, the digit sum of

357. Geometry

BC is a triangle with ∠BAC=60∘,AB=5 and AC=25. D is a point on the internal angle bisector of ∠BAC such that BD=DC. What is AD^2? It is not stated that D lies on BC. This assumption is not necessarily true.

358. Science

how many kw is an airflow of 30m³/s @130°C

359. Combinations Maths

For how many positive integers n are there exactly ⌊n/2⌋ or ⌈n/2⌉ primes less than or equal to n?

360. English

Can someone check of this email is grammatically correct? Thank you. How are things? 1) I’ve been on holiday in England and I’ve been attending an English summer course for two weeks. 2) I’ve met an interesting girl from London, Mary, at a party

361. English

1. He seldom tatoos roses on his arms. 2. He sometimes woos when he meets a pretty lady at a meeting. 3. He seldom tatooes roses on his arms. 4. He sometimes wooes when he meets a pretty lady at a meeting (Which ones are grammatical?) 5. He tatooed a

362. math

What is the rule for this input/output table Input 2 output 10 Input 6 output 26 Input 8 output 34 Input 10 output 42