# Questions Asked onMarch 7, 2013

1. ## Cal 1

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x

2. ## math

two systems of equations are giving below for each system choosethe best description of its solution if applicable give solution x+4y=8 -x-4y= -8 choose which one this problem fit in 1)the system has no solution 2) the system has a unique solution (x,y)=

3. ## math

Cinema 2 has 25 seats in the first row and 30 rows in all. Each successive row contains one additional seat. How many seats are in the theater

4. ## English

select an object from starry night and write sentences in which you personify that object what does that mean ?

5. ## Chemistry

What will happen if a small amount of hydrochloric acid is added to a 0.1 M solution of HF? A) The percent ionization of HF will increase. B) The percent ionization of HF will decrease. C) The percent ionization of HF will remain unchanged. D) Ka for HF

6. ## not sure where to begin

In what ways is your standard of living different from that of your parents or grandparents when they were your age? Why have these changes occurred ?

7. ## Biology

Dopamine is a neurotransmitter—a chemical released by nerve cells to send signals to other nerve cells. Activities like sex and gambling increase the levels of dopamine released within the brain. The highly addictive drugs cocaine and methamphetamine

8. ## Chemistry

Oxidation of bis(bipyridine) copper (I) ion by molecular oxygen is described by the equation: Cu(C10H8N2)2+(aq) + O2(aq) ----products The reaction is first order in oxygen and second order in Cu(C10H8N2)2+ (a) Write the rate law (b) What is the overall

209. ## maths help plsss

A bucket contains 8m^3 of water. Using two smaller buckets of 3m^3 and 5m^3 respectively. How will you manipulate accurately so that only 4m^3 is left in d biggest bucket?

219. ## math

Application The steps to the front entrance of a public building rise a total of 1 m. A portion of the steps will be replaced by a wheelchair ramp. By a city ordinance, the angle of inclination for a ramp cannot measure greater than 4.5°. What is the

220. ## Chemistry

You are using concentrated hydrochloric acid solution (12.0 M)to make 445.0 ml of a 5.85 M solution. Calculate the number of milliliters of concentrated HCl required to make the solution.

221. ## Lang. Arts

Rewrite sentence and place commas where necessary. Yes skateboarding is not only a sport but a science. I wrote: Yes, skateboarding is not only a sport, but a science. I was wrong...can you please help me by correcting.

222. ## Life orientation

Please guys help me with this question.What,according to the basic conditions of employment act apllies with regard to the contraventions that you've identified?

223. ## Math (immediate help, please)

Find the area of a regular pentagon with a side 8 centimeters. Please provide an explanation!

224. ## chem

Calculate the pH of a solution made by adding 3.20 g of lithium oxide (Li2O) to enough water to make 1.210 L of solution. (Kw = 1.0 10-14)

225. ## Chemistry

calculate the standard free-energy change for the synthesis of hydrazine from nitrogen and hydrogen. N2(g) + H2(g) right arrow N2H4(l)

226. ## chemistry

Calculate the pH of a 195 mL solution containing 7.50g of ethylamine (CH3CH2NH2) and 7.50g of ethylammonium bromide (CH3CH2NH3+ Br-). The Kb of ethylamine is 4.7 x 10-4

227. ## Math

There are a total of 103 foreign language students in a high school where they offer Spanish, French, and German. There are 19 students who take at least 2 languages at once. If there are 38 Spanish students, 38 French students, and 46 German students, how

228. ## physics

. A block weighing 50 lbs is pulled horizontally w/ constant speed, if the coefficient friction between the surfaces in contact is 0.25, how much heat is generated by friction if the body moves a distance of 40 ft

229. ## English

Is fill in the blank A _______ is a character that has qualities that represent a group instead of the individual character

257. ## US HISTORY

Can anyonehelp me with these questions about World War II. True or false- Japan wanted to defeat Australia in WWII because of it strategic location. Many believe that the origins of WWII can be traced back to the terms of the document that they believed

258. ## English

Circle the verb that agrees with the subject of each sentence below 1.Black and white (is are) my favorite color combination. is 2.The trees and shrubs (look looks) nice today look 3.Place mats or a tablecloth (go goes) in the picnic basket 4.Trucks and

259. ## compound interest

1. If you were to place \$15,000 in the bank at 3% interest, how much would you have in the bank after one year if the interest were compounded quarterly?

260. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top

261. ## Science

how would tides be different if the moon revolves as fast as the earth rotate

262. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #2: Suppose the spring in a pinball machine has a spring

263. ## math

Sven is thinking if two numbers. The sum is 12 . The difference is 4. What are the two numbers

264. ## math

Suppose G is a connected, simple, planar graph with 100 vertices. What is the largest possible number of edges in G?

265. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #3: A 30 kg kid on rollerskates is being pushed by his

266. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #4: What is the increase in thermal energy to a 2000 kg

267. ## English

Circle the verb that agrees with the subject of each sentence below 1.Neither my coat nor my dresses (is are) in the suitcase. are 2.Dell and Amy really (like likes) science like 3.The St. Bernard and the terrier (play plays) together play 4.Either the

268. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #5: A roller coaster car starts at Point A at a height of

269. ## Physics

A roof tile of 0.2kg drops 10m from the top of the building to the ground if a tile falls with a uniform velocity calculate its k.E as it stricks the ground using kinematic principle

270. ## PHYSICS

Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #6: A 30 kg kid on rollerskates is moving 1 m/s. His

271. ## math

in a pentagon each of the two angles measuer 76 degrees another angle measueres 111 degrees and the fourth measures 146 degrees. what is the measuer of the missing angle? what is it can you explain step by step please!

272. ## Physics

What does a simple pendulum travel through at the lowest point during its period?

273. ## math

1. List the terms in the expression below, place a comma between each term. 19cd + 6d^2 + 8 2. List the coefficients in the expression below, place a comma between each coefficient. -7y + 13ab^2 + x

274. ## Health

What are the social effects on you and your family if you abuse the drug LSD?

275. ## Check my physics

Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic

276. ## Physics

A 1.2kg box on a table slides through a displacement of d is equals to 2m a frictional force fx =0.5N Wat is the initial speed of the box

277. ## physics

A 90kg stuntman falls from a building that is 80 meters tall. (Vo = 0) Fortunately, the stuntman is attached to a cable that is wrapped around a flywheel (massive spool), with a radius of 0.5m. If the man takes 8 seconds to reach the ground, (a) what is

278. ## chemistry

the reaction between H2 and O2 reaches equilibrium in a closed container according to the following balanced equation: 4HCl+O2=2H2O+2Cl2 the volume of the container is 5dm3 calculate the equilibrium constant (Kc) for this reactin

279. ## Social Studies

I know the higher the literacy rate the higher the GDP and standard of living in a country. I'm having trouble with a study question though on how can a country increase their literacy rate. Thanks.

280. ## Maths-financial

Determine the compound interest rate,correct to two decimal places,Emile would require to triple his investment over a period of 10 years?

281. ## Pre-Algebra

How do you Factor t^2 + 4z^2

282. ## English

Write the verb that agrees with the subject of each sentence below 1. Land and water ___ drawn to scale on a globe (is are) is 2.On a globe or a map an inch or a centimeter ___ for a much larger unit of measurement (stand stands) stands 3.Neither these

283. ## Math

How do I factor y^3 + y^2 -4y -4

284. ## Math for Ms. Sue please!

1. Name the solid with the description as a figure that has one base that is a rectangle and four lateral surfaces that are triangles. (1 point) triangular pyramid cone rectangular prism rectangular pyramid 2. A solid with two parallel and congruent bases

285. ## math

The sum of the first 10 terms of an arithmetic series is 145 and the sum of its fourth and ninth term is five times the third the..determine the first term and constant difference

4. Choose the correct form of the modifier: When my sister is thinking, she sits __________. A.) silent *B.) silently 5. Choose the correct form of the modifier: I was _________ excited about going to the concert than I usually am. A.) little *B.) less C.)

287. ## geometry

When v mark 4 points on a paper how many line segments are formed ....

288. ## chemistry

A buffer consists of 0.14 M KHCO3 and 0.61 M K2CO3. Carbonic acid is a dirpotic acid with Ka1= 4.5*10^-7 and Ka2= 4.7*10^-11. a) which Ka value is more important to this buffer b) what is the buffer pH?

289. ## Math

A population of 75 foxes in a wildlife preserve quadruples in size every 15 yr. The function y= 75 * 4^x , where x is the number of 15 yr periods, models the population growth. How many foxes will there be after 45 years?

290. ## Physicis

The gravitational force between two objects is 2,000N. They are moved so that the distance between them is four times the original distance. What is the new force between the objects?

291. ## Algebra 1

2k^2-13k-24 Factor the expression..

292. ## Life orientation

What unethical behaviour is taking place in the case study?

293. ## chem30

what is the molar enthalpy of combustion for magnesium? calimetry experiment results 100.0ml of HCl with 0.31g of Mg ribbon temp before ribbon added 23degrees and after ribbon added 37degrees. Need to show work so I understand. q=mcdeltaT

294. ## chemistry

A gas with the smell of rotten eggs is evolved with dilute sulphuric acid is added to a simple of salt.the gas evolved could turn?

295. ## Life Orientation

What unethical behaviour is taking place?

297. ## Chemistry

Given these pairs of atoms, indicate whether the following bonds are polar or non-polar covalent bonds. C-H N-H O-H C-C

298. ## Chemistry

Given the part of the molecule shown below, can the red atom participate in a hydrogen bond with an approriate bonding partner? -O-H -C-H -N-H -O-H -C-H -N-H

299. ## math

the problem is 0 < less then or equal to 2x-4

300. ## GCU

Identify the three components/puzzle pieces that you believe are most critical to the formation of a worldview. Refer to the Cosgrove text to help identify these components. 2) After considering these components, write an essay of 500-750 words that

301. ## Biology

Which of the following bond types is Testosterone capable of forming with a suitable partner molecule? Indicate your answer by checking "Yes" or "No" as appropriate. Hydrogen Bond Ionic Bond van der Waals forces As a whole, is the Testosterone molecule: -

okay, here's another one that isn't coming out right. Change to decimal equivalents. Round to the nearest ten-thousandth if necessary. 5'14" I got the 1 degree =60'which =3600" I did it using the example shown in the book, but the answer didn't come out

“Our prosperity rests on the basic [beliefs] that the work of free individuals makes a nation—and it is the job of Government to help them do the best they can... that our greatest resource is the health and skills and knowledge of our people... that

304. ## math

2x^2+7x+3/x^2-2x-15

305. ## math

what is 5x + 2>3x + 10

306. ## Chemistry

A 50.0 mL sample of 0.10 M pyridine, C5H5N, is titrated with 0.2 M HBr. Calculate the pH to one decimal place when the following volumes of titrant have been added. 0.00 mL a) 0ml b)17ml c)25ml d)40ml

307. ## physics

why are water tanks broader at the bottom than at the top

308. ## Chemistry

Describe an experimental method for the estimation of oxalate in the product, potassium trioxalatoaluminate(III)

309. ## Math

If you have 36ft of fencing what are the areas of the different rectangles you could enclose with the fencing? Consider only whole number dimensions.

310. ## chemistry

2NaOH + H2SO4 yields Na2SO4+2H2O calculate the molarity of H2SO4

311. ## Physics

A 90kg stuntman falls from a building that is 80 meters tall. (Vo = 0)Fortunately, the stuntman is attached to a cable that is wrapped around a flywheel (massive spool), with a radius of 0.5m. If the man takes 8 seconds to reach the ground: (a) what is the

312. ## Statistics

A list of numbers has an average of 48 and an SD of 12. The list is transformed by subtracting 3 from each entry and then dividing the result by 5. (1) Find the average of the transformed list. (2) Find the SD of the transformed list.

313. ## Statistics

A quiz consists of 10 questions. Each question is marked either “right” or “wrong.” For each student in the class, the instructor keeps a record of the number of right answers the student got. In the class, the average number of right answers is

314. ## Algebra 1

6t^2+21t-12 Factor the expression I don't know how to figure it out

315. ## Fundamentals of math

solve the system by substitution.. -3x-5y=-17 4x=y-8

316. ## Algebra

Simplify (x^-6)-3

317. ## algebra

Simplify (uv)0 ______ (u3 v)2

318. ## math

identify all real roots of x^3-9x^2+16x-8=0

319. ## Life Orientation

What,according to the conditions of employment Act applies with regard to the contraventions

320. ## algebra

multiply using FOIL and identify values of a, b, & c. (5x +5)(6x - 8)

321. ## algebra

Simplify 3x(x^2 + 6x - 8)

322. ## Statistics

Fill in the blank: 50% of the area under the standard normal curve is between -0.5 and _____________.

323. ## Physics

Periodic waves spread out over the surface of a lake where two women, Jenny and Melissa, are fishing in separate boats 102 meters apart. Each woman's boat bobs up and down 19/min. At a time when Jenny's boat is at a crest, Melissa's boat is at its lowest

324. ## maths

for what value of k does each equaton have: 6x^2+4 kx+(k+3)=0