# Questions Asked onFebruary 28, 2013

1. ## Math

A pizza was cut into 6 slices. Ben ate 1/3 of the pizza. How many slices did he eat?

2. ## chemestry

how many grams of dioxygen are required to burn 5.9 grams of C2H5OH?

3. ## Math

3/7 of the people who live in an apartment building are men. 5/8 of the remaining people are women. The rest are children. A total of 220 men and women live in the building. How many people live in the apartment building altogether?

4. ## Consumer Math

Your parents are buying a house for $187,500. They have a good credit rating, are making a 20% down payment, and expect to pay$1,575/month. The interest rate for the motrgage is 4.65%. What must their realized income be before each month and how much

5. ## algebra

The sum of the digits of a certain two-digit number is 7. Reversing its digits increase the number by 9. What is the number. Use x and y. Please help me!!!!

6. ## Linguistics

how many morphemes and syllables are contained in each of the following words? Ohio Algebra Cows Expel Congenital Canoes Cognate Herb Helicopter Saltpeter

7. ## trig

If sin theta is equal to 5/13 and theta is an angle in quadrant II find the value of cos theta, sec theta, tan theta, csc theta, cot theta.

8. ## math

Write in expanded form. 825

9. ## biology help plz?????????????????

Complete the following paragraph relating to the enzyme, β–galactosidase. This enzyme hydrolyses the disaccharide lactose to constituent monosaccharides, galactose and glucose. Drag and drop the appropriate words into the correct space. For white spaces

10. ## IB Chemistry

Which statements are correct for an endothermic reaction? I. The system absorbs heat. II. The enthalpy change is positive. III. The bond enthalpy total for the reactants is greater than for the products. A. I and II only B. I and III only C. II and III

11. ## Physics

Calculate the speed in m/s at which Earth revolves about the Sun. You may assume the orbit is nearly circular.

12. ## social studies

1. Which of the following helped to increase the populations of northeastern cities? (1 point) more diversity successful cotton crops growth of factories and trade building of the Erie Canal 2. A boundary was set between Canada and the United States as a

13. ## physics

An MP3 player operates with a voltage of 3.7 V, and is using 0.14 W of power. Find the current being supplied by the player's battery.

14. ## chemistry

What is the volume occupied by 20.2g NH3(g) at -25 degrees celsius and 752 mmHg? This is Ideal Gas Law.

15. ## Geometry

line segment ab is the diameter of circle O whose center has coordinates (6,8) . what are the coordinates of point b if the coordinates of point a are (4,2)

16. ## US History

Why was the Fugitive Slave Act so controversial? (3 points) It required all Americans to return runaway slaves to their owners, and free states opposed this law. It required all runaway slaves to be hung, and most people in free and slaveholder states were

17. ## science

are carbon particles and sugar an element, compound,solution, or heterogeneous mixture?

18. ## chemistry

3 MgCl2(aq) + 2 Na3PO4(aq) ==> Mg3(PO4)2(s) + 6 NaCl(aq) How many milliliters of 0.0800 M Na3PO4(aq) will react with 0.060 mol of MgCl2(aq)?

19. ## physics

a soccer player kicks a rock horizontally off a 40.0-m-high cliff into a pool of water. if the player hears the sound of the splash 3.00 s later, what was the initial speed given to the rock? assume the speed of sound in air to be 343m/s.

Flying to Kampala with a tailwind a plane average 158km/h. On the return trip the plane only averaged 112km/h while flying back into the same wind. Find the speed of the wind and the speed of the plane in still air.

21. ## chemistry

The gaseous product of a reaction is collected in a 12.0 L container at 280C. The pressure in the container is 3.5 atm and the gas has a mass of 96.0 g. What is the molecular mass of the gas?

22. ## Physics

The Moon is about 3.8e5 km from the Earth. Find its average orbital speed about the Earth.

23. ## Physics

Dry air will break down if the electric field exceeds about 3.0 × 106 V/m. What amount of charge can be placed on a capacitor if the area of each plate is 6.7 cm2?

24. ## Probabilities

A queen on an English chessboard is able to attack in the same row, column and diagonal. The probability that 2 randomly placed queens on an 8 by 8 chessboard will be able to attack each other can be expressed as a/b , where a and b are positive, coprime

25. ## Chemistry

Calculate the wavelength of light if 1.50 mol of photons has an energy of 125 kJ. 6.02x10^23 things=1.00 mol(things) c=3.00x10^8 m/sec h=6.626x10^-34 J sec

26. ## social studies

The Neutrality Acts of 1935 and 1937 show the United States' desire to ___

27. ## physics

Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle θ. A car can safely travel along the unbanked curve at a maximum speed v0 under conditions when the coefficient of static friction between the tires

28. ## Chemisty

how many grams of oxygen gas will be required to react completely with 92.0 grams of solid sodium to form solid sodium oxide?

29. ## Science SMI181Q

What volume of hydrogen chloride gas is produced by the reaction of 40 cm3 of chlorine with hydrogen? (First write a balanced equation).

30. ## Math

Elbert wants to plant grass seed in his backyard. His yard is shaped like a rectangle that is 6 meters by 7 meters. He plans to use a cup of seed for every square meter in his yard. How many cups of grass seed will he need?

121. ## government

During its early history, the British Parliament _____.

122. ## biology

What is the ploidy (haploid/diploid) level and how many sister chromatids are there in your own cells during anphase I, anaphase II, and telophase II (includes cytokinesis)?

123. ## trig

solve tan2x = -28/45 Thank you

124. ## biology

what specific stage during the cell cycle does random fertilization occur?

125. ## chemistry

Which of the following statements is /are true? Answer a. None of he above. b. Impurities in a solvent raise the freezing point of that solvent c. All of the above d. Non-volatile impurities lower the boiling point of a solvent e. Ions lower the vapor

126. ## biology

What do multicellular genomes spend a larger proportion of their sequences on (in terms of enhanced complexity)?

127. ## Language Arts

Which of the sentences below using direct address is punctuated correctly? (1 point) Please come with me, Sarah, and Tom, to pick Mom’s birthday present. Please come with me, Sarah and Tom to pick Mom’s birthday present. Please come with me, Sarah, and

128. ## biology

what happens to the UTR during RNA processing?

I have a take over the world assignment to do.. Come up with a way to create a long term, stable dictatorship in Canada. However you have seen what happens in dictatorships when the population becomes dissatisfied. How are you going to ensure that the

130. ## chemistry

Calculate the temperature at which it is thermodynamically possible for C (s) to reduce iron(III) oxide by the reaction: 2Fe2O3 (s) + 3 C (s) ---> 4Fe (s) + 3CO2 I don't need a specific answer, but I'm not sure how to approach the problem. I'm assuming it

131. ## physics

A unicorn stands atop a 34° hill. The unicorn gracefully slides down the grassy hill with ì=.16. Calculate the acceleration of the unicorn as it begins to slide down the hill. (b) If the unicorn slides for 13.9s before reaching the bottom, how far did

132. ## US History

Can somebody help with my son's study guide? Thank you! What did the Supreme Court cases and the ultimate outcome for the Cherokee suggest about future dealings between the United States government and Native Americans? (3 points) The U.S. government would

133. ## physics

What do you understand by positive and negative zero?

134. ## Eng

How do you make this sentence better? "It makes me feel like it is my second home with my teachers who are like a parent and siblings from another parent(friends)."

135. ## Physics

For launching a satellite into orbit around earth, would the proper conservation of energy formula be: Epi + Eki + O work = Epf + Ekf? Would work = 0 for launching a satellite? And, would Epi = -Gm1m2/radius of earth or would it just equal 0 (because we

136. ## chemisty

Hydrogen peroxide can be prepared by the reaction of barium peroxide with sulfuric acid according to BaO2(s)+H2SO4(aq)=BaSO4(s)+H2O2(aq) How many milliliters of 5.00 M H2SO4(aq) are needed to react completely with 30.5 g of BaO2(s)?

137. ## chemistry

supposed we mixed 50.0mL of alcohol w/ enough water to make 400mL solution find the % age by volume of 50L??? what is the answer plz answer my qeustion!!!

138. ## physics

is the work needed to bring a car's speed from 0 to 10 km/h less than, equal to ,or more than the work needed to bring its speed from 10 to 20 km/h? if the amounts of work are different ,what is the ratio between them?

139. ## English 11 B

What are some effects of war on literature?

140. ## science

The relationship between a fungus and a green organism is an example of a. neighbors. b. mutualism. c. parasitism. d. saprophytes. In a lichen,does the organism with chlorophyll provides the food?? and is Reindeer moss a lichen??

141. ## Calculus

I know how to do this problem, but I'm stuck at the arc length differential. Set up an integral for the arc length of the curve. (Do not evaluate the integral) x=y^2ln(y), 1

142. ## US History

Sorry, theres another one my son is stuck on.

867+734=

144. ## physic

A basketball player runs up and down a basketball court 3 complete times in 60 seconds the basketball court is 30 meter long what is the total distance traveled by the players

145. ## physic

A basketball player runs up and down a basketball court 3 complete times in 60 seconds the basketball court is 30 meter long what is the total distance traveled by the players

374+962+488

147. ## Physics

A 1000 kg car is accelerated from rest to 100 miles/hour in 10 seconds. Find the output power of this car

148. ## compound interest

you invest \$750 in a account thatg rearns 4.5%, compounded annually. Find the balance of the account after 2 years.Round your answer to the nearest cent.

149. ## Matt

You randomly draw a marble from a bag of 320 marbles. You record its color and replace it. Use the results shown in the table to predict the number of marbles in the bag that are the given color. Blue:10 Green:8 Purple:2

150. ## Calculus

Calculus If V volts are measured across a resistance of R ohms in a circuit carrying a current of I amperes, V=IR. At a certain instant, the voltage is 250 and is increasing at a rate of 4 volts/min, while the current is 0.5 AMP and is increasing at a rate

151. ## physics

The light from the sun is found to have a maximum intensity near the wave length of 470nm assuming the surface of the sun as a black body,the temperature of the sun is....

152. ## Calculus

If V volts are measured across a resistance of R ohms in a circuit carrying a current of I amperes, V=IR. At a certain instant, the voltage is 250 and is increasing at a rate of 4 volts/min, while the current is 0.5 AMP and is increasing at a rate of 0.01

153. ## physics

when 1 g of gasoline is burned in an engine about 48 kj of heat is produced. how much mass is lost in the process? do you think this mass change could directly be measured?

154. ## physics

when 1 g of gasoline is burned in an engine about 48 kj of heat is produced. how much mass is lost in the process? do you think this mass change could directly be measured?

155. ## Math

How do you find slope ?

156. ## NJHS Letter Check (plz read it's really important)

I'm writing a letter to the adviser of the NJHS in my school. Please read to see if it's good. If your confused about my post, just read the letter and you'll understand why I'm writing a letter to the adviser and why I post this post. Dear Ms. L, I'd been

157. ## Science

How do you balance this equation? Fe2O3+C=Fe+CO2

158. ## Physical Science

what will have a greater effect on the intensity of a sound, doubling its power or halving its distance? Explain your answer.

Which of the following is an example of active reading? A. Skimming over information and taking notes. B. Reviewing a chapter, question as you read, and review notes. C. Speed reading and taking notes in your own words. D. Both B & C.

160. ## science

how to calculate 10,000 PE in peson equivalent?

161. ## PHYSICS

There is a mass at the end of a 0.6 m string, being swung around overhead at constant acceleration of(3/4)pi rad/sec^2. mass is 39.84 G. Tensile strength is 12.4 newtons need to find how many revolutions there will be before the string breaks, and the time

162. ## Chemistry

calculate the amount of energy required to vaporize 43.0g of water at its boiling point

163. ## fractions

list the fractions 1/4,3/8,2/6 in order from least to greatest writen in 8ths.

164. ## physics

the speed of sound in water is 1500m/s how far way from an under see rock show a,b,c diver be show that he can hear is an echo

165. ## Math

2x^2+8x+x+4 factored

166. ## Science

How do mutations lead to cancer?

167. ## Science

How do mutations lead to cancer?

168. ## History

How did the ideas of humanism lead to the reformation?

169. ## Chemistry

How do you balance Fe2O3+C. 2Fe+CO2

170. ## Math Limits

(x^n-1)/((x-1) )=(x-α^1 )×(1-α^2 )×………..(x-α^((n-1)) ) How do we prove that n = the multiplication of the second term using limits and l'hopital's rule.

171. ## Math

what is arccot 3.107 equals to in rad?

172. ## Physics

A 220g block on a 54.0cm -long string swings in a circle on a horizontal, frictionless table at 70.0 rpm. A) What is the speed of the block? m/s B) What is the tension in the string? N

173. ## Physics

A 220g block on a 54.0cm -long string swings in a circle on a horizontal, frictionless table at 70.0 rpm. A) What is the speed of the block? m/s B) What is the tension in the string? N

174. ## math

Arrange the following in descending order. 0.8333;4/3;81.1%

175. ## maths(GEPMETRY)

ABCD is a parallelogram. E is a point on AB such that 234×AE=EB. Let DE intersect AC at F. What is the ratio AC:AF?

176. ## Application/Writing Sample

When an application asks for a writing sample, is it a good idea to give them a reflection on a poem?

177. ## maths

How many ordered triples of positive integers (a,b,c) with 1¡Üa,b,c¡Ü5 are there such that ax^2+bx+c has a rational solution?

178. ## Calculus

A 15 ft ladder is placed against a vertical wall. the bottom of the ladder is sliding away from the wall at a rate of 2 ft/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 9 ft from the wall?

179. ## Math

How high is a wall that casts a 10ft shadow @ the same time that a 6ft flag pole casts a 6ft shadow

180. ## Calculus

1a. 15 ft ladder is placed against a vertical wall. the bottom of the ladder is sliding away from the wall at a rate of 2 ft/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 9 ft from the wall? 1b. Using the

181. ## English/Grammar

There's something wrong with this sentence but I can't put my finger on it!! The federal government has put into effect a mandate that requires all gasoline in Canada to contain 5 percent ethanol.

182. ## Calculus

Water is being poured into an inverted cone(vertex down) of radius 4 in and height 10 in at a rate of 3 in^3/sec. Find the rate at which the height of the water is increasing when the water is 5 in high.

183. ## Calculus

A man is 6ft tall and is walking at night straight toward a lighted street lamp at a rate of 5 ft/sec. If the lamp is 20 ft above the ground, find the rate at which the length of his shadow is changing.

184. ## Calc

Differentiate f(x) = ln(x)/sin(x)

185. ## Chemistry

The standardized NaOH solution was determined to be 120M whereas the mass of the sample of impure tartaric acid was 1.35g. If the initial reading of the buret volume changed from 48 ml to a final reading of 17 ml at the endpoint of the titration of the

186. ## Language Arts

What fact does the author use to support her opinion about bleach? (1 point) 1. Bleach is a poison. 2. Bleach is an expensive part of processing water. 3. Bleach isn’t terrific to have around. __________________________________________ Note: This is not

187. ## MONGU COLLEGE

During an experiment conducted on the effort E to lift a load W when using a simple the following values were recorded. ……………………………………………………………………………………………… |Effort E| 20 | 24.8|30 |

188. ## Language Arts

Read the following excerpt from "Saving Water." “Abandon the bathtub, and hit the showers. Sometimes it just feels great to soak in the tub, but the tub holds between nine and 33 gallons (40 to 50 liters) of water, depending on how full we fill it.”

189. ## MONGU COLLEGE

During an experiment conducted on the effort E to lift a load W when using a simple the following values were recorded. ……………………………………………………………………………………………… |Effort E| 20 | 24.8|30 |

190. ## physics

The two plates of a capacitor hold +3200 µC and -3200 µC of charge, respectively, when the potential difference is 700 V. What is the capacitance?

191. ## finance

anyone have any information on case study of motomart senior captstone business

192. ## English

Can someone tell me if my sentences are correct, please? I'll be very thankful to you. •When I arrived at the hotel, someone was cleaning my room •If I had known that he was so rude, I would have never married him. •You would tell the truth if you

193. ## math

Write 51% as a proper fraction.

194. ## math

2 1/4 hours plus 1 1/2 hours equals ?

195. ## Chemistry

Would you balance this one SO2 + O2. SO3 Like 2SO2 + O2. 2SO3

196. ## statistics

Assume you want to estimate with the propoportion of student who commute less than 5 miles to work(20) with in 2%, what sample size would you need. Total in survey is 233

197. ## Physics

A conical pendulum is formed by attaching a 0.200kg ball to a 1.00 m-long string, then allowing the mass to move in a horizontal circle of radius 40.0cm . The figure (Figure 1) shows that the string traces out the surface of a cone, hence the name. A) What

198. ## math

Simplest form. 350-(21+11)

199. ## algebra

Data from a deer count in forested area show that an estimated 3.16 x 10^3 deer inhabit 1.998 x 10^4 acres of land. What is the density of the deer population? Is this a multiplication or division problem?

200. ## math

Factor the expression. x2 + 6x + 48 a) (x + 1)(x + 48) b) (x + 6)^2 c) (x + 6)(x + 8) d) Prime Polynomial e) Not factorable i got e... am i doing something wrong

201. ## calculs

If f(3) =4 g(3)=2 f'(3)=6 and g'(3)=5 find the following numbers a) (fg)' (3) b) (f/g)' (3)

202. ## math

3.4-2.44+5,13 simplest form

203. ## Calculus

Greetings, So I've been working on this problem: H(x) = (x^4 - 2x +7)(x^-3 + 2x^-4) H'(x)= Kept on getting it wrong and I assumed it was an algebra mistake. After multiple tries I went to a few derivative calculators to check my work... What I saw was the

204. ## Chemistry

What is the mass of the carbon atoms in one mole of c3h8

205. ## algebra

Factor the expression. x^2 + 6x + 48 a) (x + 1)(x + 48) b) (x + 6)^2 c) (x + 6)(x + 8) d) Prime Polynomial

206. ## Chemistry

for an assignment I'm writing, I'm trying to find the % efficiency of ethanol. We were given a chart that says ethanol's energy input (MJ/L) is 16.16 and its energy output is 23.58 % efficiency = energy output/energy input x100, so 23.57/16.16 x 100 I get

207. ## Physics

The ship in Figure P14.35 travels along a straight line parallel to the shore and a distance d = 500 m from it. The ship’s radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 800 m. The signals

208. ## statistics

The SAT scores of a certain population of students are approximatley normally distributed with a mean and standard deviation of 1000 and 200 points, respectively. the probabilalty that a student selected at random from the population has an SAT score

209. ## Algebra 1

Clearly show and explain each step for full credit. solve the inequality |4x-3|=5

210. ## algebra

What set of numbers is described by M={1, 2, 3, 7} L={3, 7, 9} a) {3,7} b) {1, 2, 3, 7} c) {1, 2, 3, 7, 9} d) {1, 2, 3, 3, 7, 7, 9} C? What set of numbers is described by E = {2x | x is an odd number} a) {1, 3, 5, 7, 9 . . .} b) {2, 4, 6, 8, 10, 12 . . .}

211. ## physics

A kite is hovering over the ground at the end of a straight 47-m line. The tension in the line has a magnitude of 14 N. Wind blowing on the kite exerts a force of 17 N, directed 55° above the horizontal. Note that the line attached to the kite is not

212. ## Math

Find the dy/dx for each of the following 1)y=ln(2x^6-15) 2)y= 3√ 2x^2-3x-1/5 3) y= x^4/x^2+1

213. ## math

Find the area of a parallelogram with base b and height h. b = 82 cm h = 16.6 cm .1,361.2 cm2 .6,724 cm2 .137.78 cm2 .98.6 cm2

214. ## Goegraphy

What is the distance on the ground between two places that are 7cm apart on the south africa

215. ## Math

Factor 6x^2+14x

216. ## math

I have two questions 1.) 2750 grams= lbs 2.)2km= yards and in my book I have a completely different answer. Thank you

217. ## math

As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I know 1.07 is a

218. ## Sound engineering

A Question of engineering about Sound. How to calculate in step by step? Thank you. The octave bands¡¦ Sound pressure levels in dB re 20 £g Pa are: Hz 57 129 220 420 1K 2K 4K 8K dB 85 95 90 80 88 70 68 72 What is the overall A-weighted sound pressure

219. ## calculus

y= e^-7x cos 5x y'=

220. ## Science

can you please tell me what is the answer to the When the parrot is hungry it makes this noise? thanks

3/x-5/2x

222. ## Algebra 1

A ladder is resting against a wall. The top of the ladder touches the wall at a height of 15 feet and the length of the ladder is one foot more than twice the distance from the wall. Find the distance from the wall to the bottom of the ladder. (Hint: Use

223. ## enn103f

need help for Education:an Argument for: and Argument against, ansa based on education

224. ## English

Could someone help me improve this sentence so it is more understandable and has better word choice? You now know that a wasting gas car is no comparison to a saving electric car.

225. ## Social Studies

How did the three phases of Northern industrialization affect the growth of cities? (5 points) How did the immigrants who came to the United States between 1820 and 1860 change the character of the country? (5 points)

226. ## chemistry

To raise the temperature of 200.8 g of water from 50.00 °C to 60.00 °C requires how much heat?

227. ## science

Two students play in a drumb band. Explain how the students make sounds on the drums. Then explain how one student can make a soft sound while the other student makes a loud sound

228. ## Geometry

ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If \angle BCA = 39 ^\circ and \angle EBA = 2 \angle DAB , what is the measure of \angle ABC (in degrees)?

229. ## Math

Factor 3x^3=3x

230. ## Math

in a class of 30 students 20 played piano 17 played violin and 7 played both find the number of students who played violin only, piano only

231. ## Geometry

Luis has a simple calculator that has buttons for the digits 0 through 9, each of the 4 basic operations (+, - ,*,/ ), and an '=' button. Luis pushes a digit followed by the '+' sign, followed by another digit, followed by the '-' sign, followed by another

232. ## Eng 1511

pls correct this sentence for subject-verb agreement Going home now,how I wish I could get there before it starts to rain.

233. ## math

I am not understanding this question. Can someone help me please? Decide whether the experiment is a binomial experiment. If it is not, explain why. Selecting five cards, one at a time without replacement, from a standard deck of cards. The random variable

234. ## Microeconomics

Which statement is FALSE? A. If the U.S. can produce rice more efficiently than Japan can, the U.S. enjoys an absolute advantage. B. Economists dislike both tariffs and import quotas. C. Under the law of comparative advantage, total output is greatest when

235. ## math

what is 7% of 250,000

236. ## math

What weighs less 4.09 kilogram or 4.196 kilogram.

237. ## Physics

(a) The current through a wire is a steady 2.5 amps. How much current passes through it between t = 0 seconds and t = 4 × 10-4 seconds? (b) The current through a wire is given by I(t) = I0e -at, where I0 = 2.5 amps and a = 6 × 103 s-1. How much electric

238. ## Microeconomics

The demise of the gold standard led to: A. more international trade. B. greater and greater devaluation. C. freely floating exchange rates. D. balance-of-payment surpluses. I think it's C???

239. ## Physics

A bird stands on a bare power line carrying 2500 amps of current. 600 meters of this wire has a resistance of .009 ohms. If the bird's feet are 3 cm apart, what is the voltage difference between the bird's feet?

240. ## physics

In a cloud chamber experiment, a proton enters a uniform 0.260 magnetic field directed perpendicular to its motion. You measure the proton's path on a photograph and find that it follows a circular arc of radius 6.38 . How fast was the proton moving?

241. ## Math

This year's harvest from a small, remote banana plantation consists of 3000 bananas. The farmer's camel can carry up to 1000 bananas at a time. The market where the bananas are sold is 1000 miles away. Unfortunately, the camel eats one banana each and

242. ## Physics!!!!

Assume that a scale is in an elevator on the earth. What force would the scale exert on a 53 kg person standing on it when the elevator slows at 1.77 m/s2 while moving upward?

243. ## geometry!

ABCD is a parallelogram. E is a point on AB such that 234×AE=EB. Let DE intersect AC at F. What is the ratio AC:AF?

244. ## English

the sequence in which James Thurber placed Walter Mitty's daydreams in the short story "The Secret Life of Walter Mitty."

245. ## geometry!

ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?

246. ## math

if x A y means x + (X+1) + (x+2) + (x+3) +..., y times express 12 A 3 in simplest form

247. ## calculus

Find dy/dx by implicit differentiation. x cos y + y cos x = 1

248. ## Trigonometry

Solve the equation for all values of x. -2cos²x-sin x+1=0, on the interval [0,2π).

249. ## math

Today Angela's cat's age in months is the same as Angela's age in years. In one year her cat's age in months will be 2 times Angela's age in years. Today Angela is ? years old.

250. ## math

There are 24 counters.how many counters could you add without having to regroup?why?

251. ## Trigonometry

Solve the equation for all values of x. 2sin(2x)-√3=0, on the interval [0,2π).

252. ## Maths

In a basket of 24 mangoes 1/3 were yellow 5/8 were green and the rest were orange. 1. what fraction of the mangoes were green and ripe? 2. How mangoes green? 3. How many mangoes were orange? 4. What fraction of the mangoes were orange?

253. ## Algebra

what two numbers have the product of -78 and the sum of -3.

254. ## Maths

In a basket of 24 mangoes 1/3 were yellow 5/8 were green and the rest were orange. 1. what fraction of the mangoes were green and ripe? 2. How mangoes green? 3. How many mangoes were orange? 4. What fraction of the mangoes were orange?

255. ## English

(Choose the correct answer) i hope/wish i was a bird

256. ## Physics

An automobile is brought to a stop by applying friction brakes to the wheels. The brakes get hot; their thermal energy is increased. The decrease in kinetic of the car is equal to the increase in thermal energy of the brakes. According to the first law of

257. ## Social Studies

1) The four major kinds of natural vegetation in the United States and Canada are tundra, grassland, desert scrub, and a. permafrost. b. forest. c. swamp. d. all of the above 2) Why is mining important to the economy of the United States? a. It employs

258. ## math

How do I find the decimal equivalent of the fraction 9/4?

259. ## Grammar,English

I wwas told to write a 3 syllable word for each clue. The first letter is provided. 1.Rational or reasonable [Clue:L} 2.To stand for or symbolise {clue:R]

260. ## chemistry

the rate of the following reaction is 0.72 M/s. what is the relative rate of change of each species in the reaction? A+4B -> 2C

261. ## Trigonometry

A water wheel has a radius of 15 ft. A river passing through the water wheel turns the wheel at 11 revolutions per minute(rpm). What is the speed of the river in miles per hour?

262. ## physics

Bob is driving 25 m/s and he turns a corner with a radius of 37 m. How much is Bob accelerating?

263. ## Polynomials..quick help....

if (x-7) and (x-4) are the factors of px^3 + qx^2 - 5x +84, find the values of p and q.

264. ## social studies

why did Toledo become known as "Glass City"

265. ## Chemistry

An electrolytic tin-coating process gives the coating 30 millionths of an inch thick. How many square meters can be coated with one kilogram, density 7.30 g/cm^3?

266. ## chemistry

A certain reaction has an activation energy of 27.34 kJ/mol. At what Kelvin temperature will the reaction proceed 3.50 times faster than it did at 335 K?

267. ## accouant

rectification of error

Two students play in a drumb band. Explain how the students make sounds on the drums. Then explain how one student can make a soft sound while the other student makes a loud sound

269. ## poetry

what is the grouping of lineswithin a poem called

270. ## physics

a moving walkway at an airport has a speed v1 and a length l. a woman stands on the walkway as it moves while the man in a hurry to reach his flight walks on the walkway with a speed of v2 relative to the moving walkway. how long does it take the woman to

271. ## calculus

F(x)= ln((3x+6)^4 (x^3 -2)^5 ) F'(x)=

2+9=?

273. ## Evaluation theory

A. What is the theorist Michael S. Scriven take to be the ultimate purpose of evaluation?What is the subsidiary purpose?D. What is the theorist’s general approach to carrying out purposes?

274. ## Science ASAP

1. Why is mining important to the economy of the United States? It employs many workers. Gold is expensive. Minerals are shipped to Canada. Industries use minerals. 2. What did the British North American Act accomplish? It divided Canada. Canada became an

275. ## physics

a chinook salmon

276. ## math( pre-algeba)

there were 6 purple socks and 4 orange socks in a drawer. Zucky picked one sock without looking(or replacing the first). What is the probability that he picked 2 purple socks?

277. ## Physics

An electron is projected, with an initial speed of vi=1.10e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal

278. ## Math

Which is greater 6.13 or 5.99

279. ## math

Erica painted a picture of her dog. The picture has an area of 3,600 cm2 and is square. She has placed the picture in a frame that is 5 cm wide. What is the perimeter of the picture frame? Is the correct answer 260 cm2?

280. ## chemistry

mass of the metal 7.26g volume of water in the calorimeter 10mL initial temp of water in calorimeter 21.5 degrees C initial temp of metal 95.5 d C final temp in mixture in calorimeter 23.8 D C question: calculate the energy lost by the metal taking into

281. ## Pre-calculus

*polynomial in standard form 1)5/12+7/18=5/6 2) 3x/(x+1)-1/(x)=______/x^2-1x

282. ## pyrometallurgy

pyrometallurgy of biotite

3. Which of the following is a solution of x² + 14x + 112 = 0? If necessary, round to the nearest hundredth. A.) x = –0.24 B.) x = –4.24 C.) 4.24 *D.) no solution Thank you

284. ## english

does anyone know the movie the dead poet society? I chose a character from the movie, Mr.Keating I need help giving example of how mr.keating embodies Transcendentalism, romanticism, and realism I really need help with giving example of romanticism and

285. ## Math

Simplify the expression: (((((-18((a)^(11))((b)^(-1))((c)^(3)))/(12((a)^(4))((b)^(3))((c)^(0))))))^(-2)) What is step by step answer without negative exponent.

286. ## Math

Evaluate. 31/12-2-1*(1/4)*(5/(-6))/(-(-5)/(-2))

287. ## Math

Is this true or false? To expand the binomial (x2 + 3)6, use the row of Pascal's triangle that has coefficients 1, 5, 10, 10, 5, 1.