1. Maths

Prove sqrt(Sec^2 A+Cosec^2 A)=TanA+CotA

2. Speech

After analyzing a problem, what is the next step in the problem-solving process? a. Develop creative solutions. b. Identify possible solutions. c. Select a solution. d. Implement a solution. I think it might be B

95. MATH

If someone told you the depth in Lake superior was 1,333ft, would it be expressed as mean, median, mode, or range

96. chemistry

calculate the percent composition of the compound that forms when 222.6 g nitrogen combines completely with 77.4g oxygen.

97. Trig

a clock has a diameter of 1 foot what is the angular size if viewed from a distance of 27 feet

98. music

The form of the melody called the bar form is represented by A)AAB B)ABB C)ABA D)ABBA

99. Geometry

How do solve the equations algebraically? x^2 + y^2 = 25 3y - 4x = 0

100. Math

Could someone answer this question so I understand it. Thanks Find the indefinite integral. x/ã3x^2+4 dx = Simplify the answer. Use C as the arbitrary constant.

1 kg= g

102. math

name a multiplication fact that can help you with 8x4, and tell how

103. s.s (social studies)

IS THIS RIGHT ? There comes a time in history,when the Americans must break away from england and become a separate nation , equal with other nations like god planned all along.We care about what the rest of the world thinks,therefore we will clarify why

104. teacher aide

I need help! What information is included in the instructional guide that accompanies most audiovisual materials? A How to operate the projection equipment to show the materials B How to duplicate the audiovisual materials C A summary of description of the

105. Algebra

The picture has an arrow on it with the back of the arrow on the 3 and 4 In which quadrant(s) could a point be located if its coordinates are reciprocals of each other?

106. s.s (social studies)

can you help me translate the declaration of independence? first passage: When in the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the

107. Geometry (math)

The center of two pulleys are 27cm apart. One has the raddius of 13cm and the other has a radius of 5 cm.. Find the length of the blet that surrounds the two pulleys rounded to 2 decimal places.

128. Chemistry

1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess

129. college albegra

Brandon has 3 inventions, one saves 30 percent on fuel; a second saves 45% a third saves 25%. If he uses all three inventions at once, what percent can he save on fuel? do I add all of the percentages together and divide by 3? =1/3 or 3%? or is it 100%?

130. college algebra

Amy sets up a game in which she puts four $10bills and one$20 bill in one box. Blindly grabs one of the bills and keeps it. To break even on average, how much must she charge the player to play? is it just 60-2o=40....so she would need to charge the

131. Teacher aide

Which of the following equipment would you use to show a filmstrip to an entire class? A filmstrip viewer B filmstrip projector C videocassette recorder D movie projector Just want to know if I have it right. Is it B

132. Math

Math.. find limit help? Find the given limit. (x→ 1)lim: (square root x-1) + 1

133. English

Describe the confrontation between Ralph and Jack in Chapter 6 of Lord of the Flies.

134. Algebra

Pauline sells computers on commission. She spends 2 hours on selling a laptop and 1 hour on selling a desktop computer. She works no more than 40 hours per week and routinely sells at least 1 laptop and at least 4 desktops each week. To maximize her

135. clinical chemisty

why is lupus inhibitors important

136. math

write a mixed number for 106

137. college algebra

Shellie pays $4.00 for a square piece of wood, which she makes into a stop sign by cutting the corners off. what is the cost of the wasted part? I don't even know where to begin? do I take$4.00*1/8....which equals half and subtract that from

138. physical Science

Explain why a ceramic bowl will keep oatmeal hot longer than a stainless steel bowl?

139. science

how do you make 5-Pentyl-1,3-benzenediol from just benzene? 1.Benzene + Br2 +FeBr3-->Benzene-Br??

140. World Lit.

what disobedience techniques did gandhi use to gain independence in india?

141. math

what would be the length of a shadow cast by a 50 foot high building?

142. Social Studies(Thesis)

I read all about thesis and i made my thesis about child labor At what age is it appropriate for a child to have a job and a child should have a right to freedom. That is my thesis is it correct yes or no THANKS

143. system of equations

solve using any method and identify the system as consistent, inconsistent or dependent. 3x-4y=8 6x-2y=10 I want to use elimination. this is taking me forever!

171. physics

A laundry detergent contains a three-level quantum system ("whitener") which absorbs ultraviolet light at 273 nm. It emits light at 597 nm as part of a two-step process . What is the wavelength of the second emission process?

172. math

if anna drew a circle that has an area of 153.86 square meters what is the radius of anna's circle

173. math

factoring to solve quadratic equation 5x^2=16x+45

174. Physics

an object that is 6 cm in height is put 9 cm from a convex lens. The lens has a focal length of 8 cm. What is the size of the image?

175. statistics

In prior investigations made by a local Gas and Electric Company, 65% of homeowners prefer to heat with gas instead of electricity. In a recent study of 200 homeowners 60% prefer heating with gas. In a two tailed test at a .05 level of significance can we

176. chem

make 300.0 mL of a pH 5.30 buffer from 0.500 M acetic acid and 0.500 M sodium acetate. Calculate the volume of 0.500 M acetic acid and the volume of 0.500 M sodium acetate required to make 300.0 mL of a buffer solution with pH = 5.30. (The Ka for acetic

177. math

A. Find the mode of the following set of numbers. b. Find the range of the following set of numbers. 11, 13, 13, 12, 11, 12, 13, 10, 14

178. pre calc

cos2x=cosx in interval of [0,2pie]

179. math

6n+5 if n =4.5 what is n

180. Literature (Vocabulary)

When the _1_ citizens of Reynoldsville finally realized that their forty-cent bottles of miracle sap contained nothing more than licorice extract and whiskey, they formed a lynch mob and searched for the _2_ who had sold the fake elixir. Fortunately,

181. chem

make 300.0 mL of a pH 5.30 buffer from 0.500 M acetic acid and 0.500 M sodium acetate. Calculate the volume of 0.500 M acetic acid and the volume of 0.500 M sodium acetate required to make 300.0 mL of a buffer solution with pH = 5.30. (The Ka for acetic

182. Statistics

According to the U.S. Federal Highway Administration, the mean distance traveled per shopping trip by Americans was 10.0 miles in 1983. A random sample of 25 shopping trips for this year gave a mean distance traveled of 12.0 miles with a population sample

183. physics

An 850 N sled is pulled a distance of 180 m. The task requires 1.20 104 J of work and is done by pulling on a rope with a force of 125 N. At what angle is the rope held? answer: ____ ° (with the horizontal)

184. chem

an average airbag contains 132 g of NaN3. How many liters of nitrogen would produce on a warm day at 85 degrees F and a pressure of 1atm?

185. Physics

Calculate the length of a meter stick moving with a speed of v = 0.9995c as measured by an observer at rest.

186. social studies

why they are grouped in one community?write at least threereasons. (1)christine. (2)hindu.(3)muslims.(4)sick.

187. physics ( help FAST)

Which could potentially cause you the greater injury: being tackled by a lightweight, fast moving rugby league player or being tackled by a player with double the mass but moving at half the speed? Explain your answer

188. math

Evaluate a) |-59|-|-93| b) |-45| +|33|

189. math

factor completely 7y^2+22y+3

190. algebra

Your company would like to know how sales levels affect profits. If too few items are sold, then there is a loss. Even if too many items are sold, however, the company can lose money (likely because of low pricing). It is good to know how many items can be

191. math/alg

Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).

192. Ochem

Diethyl ether is used as a solvent for the reaction of diethylamine with m-toluoyl chloride. Why is a solvent necessary for this reaction?

193. math

a) Identify the base in the following statement b) Solve for the amount. What is 81% of 285

194. organic chem

(1) Isobutyraldehye + formaldehyde + NaOH/H2O → II (C5H10O2) what is the structure?

195. math

Which of the following inequalities has x > 4 as a solution? A: 6x < -24 B: x + 4 > 0 C:-5x + 2 < -18 D: 4x + 2 > 14

196. Math (Reiny??)

Mrs. Reiny ... As in Harris County Mrs. Reiny?

197. human life

What are the human and environmental factors that cause ill-health,sickness,trauma,accidents,crises and disasters in South Africa

198. English

I need the synonyms and antonyms to all the tenth grade SAT vocabulary list!!

199. Math

1/5(2x+10)=2x-8

200. Science

5 Grade class with 20 students collected snack-survey data.The class made the circle graph. Cookies:5,Granola Bar:4,Candy Bar:7 Fruit:3,Other:1

201. Math

consider the following linear equataion: 4x+11y=2011 How many solutions are there such that x and y are positive integer? (note the date 4/11/2011)

202. LIfe orientation

In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community.Provide relevant sources to support your claims.

203. home economics

STATE AND EXPLAIN THE BRANCHES OF HOME ECONOMICS.

204. Chemistry

Calculate the sodium ion concentration when 70 ml of 3.M sodium carbonate is added to 30 ml of 1.M sodium bicarbonate.

205. math

what is 5 divided by -4?

206. algebra

4X+8/X+1 * 2-X/3X-15 / x^2-4/2x^2-8x-10

207. math

How long does it take to travel 84.2km at 80 kph

208. physics

A 187 W motor will lift a load at the rate (speed) of 6.58 cm/s. How great a load can the motor lift at this rate?

209. math

how do I determine the compounding rate required to turn $350 into$14,000 over 30 years? Thank you

210. organic chem

Suggest a synthesis for olivetol from benzene and any necessary organic and/or inorganic reagents.

211. social studies class 2

why chiristan grouped in one community ?write at least three resons.

212. trig identies 5.3 &5.4

use a sum or difference identity to find an exact value pie/12

213. organic chem

Suggest a synthesis of 2,4,6-trinitrofluorobenzene from benzene

214. Algebra

An object which is dropped from 100 feet above ground falls according to the formula s = -16t^2 + 100, where s is the distance from ground level at time t. Which equation is equivalent to this formula? S-100 = t^2 ------- -16 S-100 = t^2 ------ 16 s - 100

215. pre cal

how do you work out cot squared feta - CSC squared feta?

216. history

How much changed in the norman conquest

217. social studies class 2

why sick grouped in one community?write at least 3 resons.

218. organic chem

Suggest the syntheses of putrescine and cadaverine from ethyl bromide

219. history

How much changed in the norman conquest

220. social studies class 2

why hindu are grouped in one community?write at least three resons.

221. social studies class 2

why muslims are grouped in one community? write at least three resons.

222. organic chem

Suggest the syntheses of cadaverine from 1,5-Dibormopentane

223. stoichimetry

how many liters of NH3 can be produced from 23.1 grams of H2 ?

224. Math

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point,

230. Physics

A 166 g mass is attached to a horizontally mounted spring. It is pulled out to stretch the spring and then released. You determine the period of the oscilliation to be 1.0 seconds. What is the acceleration of the mass (magnitude) when the spring is

231. Algebra

Is the point (-3,-2) a solution of the intersection of the following set of quadratic equations: Y < -X ^ 2X^2 + Y^2< 16

232. algebra

what is the radical and x=5 on the inside of the radical?

233. Math

Use algebra and the properties of limits as needed to find the limit. If the limit does not exist, say so. (→ − ∞)lim: 9x^2+5x-17 / 5x^3+12x^2+21

234. social studies class 2

write at least three differences among these community. (1)Muslims.(2)Hindu.(3)Sick.(4)Christin.

235. english

Can someone give me some example on indefinite pronouns. Like in sentences!! thanks!!!

236. ah trig help

use an apropriate sum or difference indentity to prove the double-angle identity cos2u=1-2sin2u

237. Chemistry

1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess

238. History

Is it okay to end an essay with a rhetorical question?

239. Probability

Factories A and B produce computers. Factory A produces 2 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.012 and the probability that an item produced by factory B is defective is 0.04. A computer

240. MATh

Number of Cans of Corn Cost 3 $1.95 5$ 3.25 6 $3.90 9$5.85 Write an equation to represent the data how do i do that

241. Slope Int, Form

how to solve y= x-4

242. physics

the most common reasons for rear - end collisions are too short a following distance, speeding and failing brakes. car A of mass 1000 kg, stationary at a traffic light, is hit from behind by car B of mass 1200kg, travelling at 18m.s. immediately after the

243. algebra

SOLVE A=bh for b I came up with b= A/h Am I correct?

244. math

what is 20 plus a -3?

245. math (pre calc)

4cot^2x-4/tanx+cosxsecx write expression in factored form as an algebraic expression of a singletrig function

(8+ )*m=5m

247. math

Find the five-number summary of the following set of numbers. 341, 233, 181, 368, 247, 551, 286, 223, 313

248. history

In the 1950's, how did some corperations expand to protect themselves against the dangers of economic downturns?

249. math

x^3 - 3x^2 + x Substitute 3 for x so i got 3^3 - 3(3)^2 + 3 27 - 3 - 9 + 3 24 - 9 + 3 15 + 3 18 Is this correct ??????????//

250. computer science

to write a report on Object-Oriented Systems. The report should focus on the following systems including definition, applications, and advantages and disadvantages. • Object-oriented Systems • Object-oriented database • Object-oriented data modeling

251. math

At what rate are Martin's FICA taxes withheld? 7.5

252. Science

Imagine you made a gallon pitcher of lemonade for your family picnic.You poured the lemonade into 12 paper cup until there wasn't a drop left.Is the volume of the lemonade in the pitcher and the lemonade in the 12 paper cups put together the same or

253. math

when adding and subtracting integers does 2 negatives equal a positive? And does 1 positive plus 1 negative number equal a negative?

254. identities trig?

find all solutions to the equation in the interval [0,2pie] cos2x=cosx

255. Algebra

In chemistry, n molecules of an ideal gas have pressure (P), volume (V), and temperature (T) that stand in the following relation, where R is a constant. PV = nRT If you solve for n what would be a good equation? I came up with n=PV/RT Some other choices

256. Chemistry

Calculate the amount of sodium acetate trihydrate needed to prepare 100 mL of 0.2M sodium acetate solution.

257. I need help to unscramble these words in spanish

oaincooEdm arAilulq incEle asertdarccteoipPr erIoscrdapm loEcernoict lpaLaeliuc mroipliEeltbe

258. chemistry

If the average quarter weighs 5.67grams, how many atoms of nickel are in a quarter? ie; 91.67%mass/copper 8.33%mass/nickel I took 5.67x0.0833=.47g .47gNi/58.6934=801 atoms nickel? is this right?

259. english

can someone help me withindefinite pronouns!!!!!!! like with sentences with the uses too like adj noun do io op subject????

260. Math

From a 10-inch-by-19-inch piece of cardboard, 3-inch-square corners are cut out, as shown in the figure above, and the resulting flaps are folded up to form an open box. Find the surface area and volume of the open box

261. algebra

_____j - 4.5j =3.8j

262. Math

An indoor track is shaped like a rectangle with a semi-circle on each end. The distance around the track is 200 yards. Find the maximum area enclosed by the track.

263. math

-1 plus 15 equals what?

264. math

4cot^2x-4/tanx+cosxsecx factorin algenraic single trig function

265. Teacher aide

I'm having trouble with this question. Why would you mount an overhead transparency in a cardboard frame? A to make copies of it B to color it C to add overlays D to project it onto a screen Can someone please help me.

266. science

how do you find out the chlorine level in water after you have found how many drops of silver nitrate is needed to turn 20ml of water combinde with 2.5ml of protasium chromate a permanent red.

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). (a)Initially P is projected from the point x=4 with speed 0.5. Show that P oscillates between two extremes points and find the period of the motion. (b)Show that

268. math

what is the answer to this math problem, y= -1/4(x+3)^2-3

269. arithmetic

Write a rule for the nth term of the arithmatic sequence. Then find a10. 1. -4,2,8,14,20 2. -25,-29,-30,-37,-41

270. history

What ultimately changes John Adams's mind and favor of American revolution?

271. science

who rubbing two different pieces of cotton together give each piece of cotton a +ve or -ve charge

272. geometry

Which of the following does not always bisect at least one side?

273. Physics

A 10-kg ladder 2.5m long rests agaist a frictionless wall with its base on the floor 80cm from the wall. How much force does the top of the ladder exert on the wall?

274. math

does a -8 plus -7 equal 15 then?

275. p.e.

How to fill out an observation document?

276. math

how to convert cm3 to liters?

277. math

How to convert cm3 to liters?

278. lit

i need help on describing LADY MONTAGUE in romeo and Juliet.

279. child care

windows of time during which enviorment influences on development are enhanced are called blank periods? a.sensitive b. critical c. crucial d. necessary i say c?

280. Social Studies(child Labor)

what is the right spelling for child labor did i spell child labor right or it is child labour i think the right spelling is child labor in google i saw a spelling like child labour

281. science

when would we use parsec, astronomical unit or light year? how would you determine which is the best to use?

282. physics

The energy of the electron in the 2s state is -12.98 eV, the energy in the 3s state -10.84 eV. What is the wavelength of the absorbed photon?

283. science

what is the condidtion of earths atmosphere at a particular time and place?

284. science

why do astronomers use these measures instead of centimeter meters and kilometers

Number of Cans of Corn Cost 3 $1.95 5$ 3.25 6 $3.90 9$5.85 Write an equation to represent the data how do i do that I think the answer is 0.65n = c

286. MATH

A paper is 28cm long, how many meters is this?

287. Math

gallons of milk were \$2.30 each. Write an expression to show this for “g” gallons.

288. science

improper functining or regulation of which of the following might lead to poor regulation of membrane permeability? 1.albumin 2.fibrinogen 3.platelets 4.lymphocytes 5.chloride ion levels

289. Math

Naomi studied each of the letters below with a flat mirror. abcdefghijklmnopqrstuvwxyz she then constructed this chart characteristic 1 charac 2 char 1&2 bcdehiox hiox what letters go in the second column

290. Physics

Glass of water has mass of 240g at room temp (25°C). Add 50g of 0°C ice. What final temp after ice is melted. (at equilibrium).

291. physics

An atom absorbs a yellow photon in the transition from its 2s to its 3s state (see figure on the left, not drawn to scale). What color photon might it emit in a transition from the 3s to the 2p state?

How many grams of CuSO4.5H2O are needed to prepare 100. mL of a 0.to M

293. HCS/457 - PUBLIC AND COMMUNITY HEALTH

Why is it important to consider the components of the social ecology framework in community and public health?

294. social studies

Nepal is a country of full of geographical diversities

295. Calculus

find the integral of (1+3t^5)^20*t^4dt

To what volume should 5.o g of kcl be diluted in order to prepare a o.25 m solution

297. Science (Asap)

Imagine you made a gallon pitcher of lemonade for your family picnic.You poured the lemonade into 12 paper cup until there wasn't a drop left.Is the volume of the lemonade in the pitcher and the lemonade in the 12 paper cups put together the same or

298. Math

Could someone answer this so I understand it. Thanks The projected rate of increase in enrollment at a new college is estemated by dE/dt = 9000(t+1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 5000 now (t=0), find the

299. maths

a melon costs 5.45 for 3.2kg how much would 6.5kgs cost?

300. math

need help with the setup on this problem.. if something grows @ 10% per year how long would it take to go from 100 to 300?