# Questions Asked onNovember 27, 2012

1. ## Math: Algebra

1. Which method would be the simplest way to solve the system? 7x + 5y = 19 –7x – 2y = –16 A.) graphing B.) substitution C.) elimination D.) distributive I think it is C.

2. ## Physics

A student sits on a rotating stool holding two 3.4-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is

53. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

54. ## chemistry

a saturated solution of barium chloride at 30 degrees Celsius contains 150 g water. how much addition barium chloride ca be dissolved by heating this solution to 60 degrees celsius? bacl2 at 30 degrees= 38.2 bacl2 at 60 degrees= 46.6

55. ## Physics

A 4.0 kg wheel of 20 cm radius of gyration is rotating at 360 rpm. The retarding frictional torque is .12 N.m. Compute the time it will take the wheel to coast to a rest.

56. ## science

what happens to a liquid when it releases enough energy?

57. ## chem

Describe in detail by words how to prepare 200ml of .150M HCl from a 1.00 M HCl stock solution? Need help with this please? i used C1V1=C2V2 and got volume 2 = 33L or 0.33mL. to prepare the solution i need to weigh 1 gram of HCL (from 1.00M HCl stock

58. ## CALCULUS

what is the area in square units of the region under the curve of the function f(x)=x+3, on the interval from x=1 to x=3? 10 12 14 16 18 ?

59. ## Statistics

The nicotine content in cigarettes of a certain brand is normally distributed with mean (in milligrams) μ and standard deviation σ = 0.1. The brand advertises that the mean nicotine content of their cigarettes is 1.5, but measurements on a random sample

60. ## Physics

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

61. ## abnormal psych

# 1.44 (1 pts.) Dr. Green is an admitting psychologist at a psychiatric hospital. Unfortunately, every client she interviews receives the diagnosis of schizophrenia. Dr. Green's diagnostic system ignores A) reliability. B) variance. C) base rates. D)

62. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

63. ## math

aubrey can walk 4 1/2 miles in 1 1/2 hours. find her average aspeed in miles per hour.

64. ## Physics

The velocity of the baseball as it leaves the bat is 38.2 m/s. Determine (a) the maximum height the baseball reaches, and (b) the total timke the baseball is in the air. Assume the baseball is caught at the same height above the ground as it was hit.

65. ## probability

two fair six-sided dice are rolled and the sum of the dots on the top faces is recorded. a) complete the table, showing the number of ways each sum can occur sum: 1 2 3 4 5 6 7 8 9 10 11 12 ways:1 2 3 b)use the table to find the probability of the

66. ## physics

A uniform disk of radius 0.48 m is mounted on a frictionless, horizontal axis. A light cord wrapped around the disk supports a 1.4 kg object, as shown. When released from rest the object falls with a downward acceleration of 3.6 m/s^2. What is the moment

67. ## Physics

A man cycles up a hill whose slope is 1in20. If themass of the man and the cycle is 150kg and the man covers a distance of 100m along the incline, calculate the work done by theman.

68. ## physics

A 346 kg merry-go-round in the shape of a horizontal disk with a radius of 1.7 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. How large a torque would have to be exerted to bring the merry-go-round from rest to an

69. ## physics

A solid sphere of radius 23 cm is positioned at the top of an incline that makes 23 degree angle with the horizontal. This initial position of the sphere is a vertical distance 3 m above its position when at the bottom of the incline. The sphere is

70. ## psych

1.11 (1 pts.) While Pete was out playing touch football with his friends, he tripped, fell, and bumped his head on the ground. Immediately afterward, he was very disoriented and kept asking his friends what time it was. Pete may have experienced A)

71. ## Physics

A man lies on a plank of negligible mass supported by two scales 2.50 m apart. His head rests on the left scale which is also the axis of rotation. If the left scale reads 290 N and the right scale reads 122 N calculate his mass.

72. ## physics

What is the speed of sound in a medium where a 100-kHz frequency produces a 5.96-cm wavelength?

73. ## Multi-Step Equations

There are not any choices to these so I need help 1. x/4 + 1 = -5 2. 6x + 29 = 5 3. Combine like terms -21a + 16a

74. ## Finance

5.3 The manager of a large computer network has developed the following probability distribution of the number of interruptions per day: Interruptions (X) P1X2 0 0.32 1 0.35 2 0.18 3 0.08 4 0.04 5 0.02 6 0.01 a. Compute the expected number of interruptions

75. ## chemistry

The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 g·mL–1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 585-mm column of di-n-butyl phthalate. The density of mercury is 13.53

76. ## chemistry

Balance the following equations. Show all work. MnO4- + Zn -> Mn2+ + Zn2+

109. ## science/math

write and solve an algebraic equation to find the original mass of the sample of the radioactive isotope uranium -235, which has a half-life of 704 million years your sample is about 700 million years old and weighs 120 grams

110. ## PRE CALC

Which combination of limit properties is required to evaluate this limit? lim (24/x-2x+2)^3 x->4 f. sum, difference, product, root g. sum, difference, product, power h. sum, difference, quotient, power i. sum, difference, quotient, root j. A limit does not

A 66 kg human sprinter can accelerate from rest to 11 m/s in 3.4s. During the same interval, a 35 kg greyhound can accelerate from rest to 20 m/s. Compute (a) the change in kinetic energy of the sprinter. (b) the change in kinetic energy of the greyhound.

112. ## music

how can i write music and what is the write letters

113. ## Light Energy Problems

The binding energy of electrons in a metal is 194 kJ/mol. Find the threshold frequency of the metal. ----------------- The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.78×10^−6 m that must be absorbed to melt 6.80 g

114. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

115. ## Math

If the ratio of girls to boys on the track team is 5 to 6 which of these shows possible numbers of girls to boys on the track team? A.24 girls 20 boys B.50girls 56 boys C.60 girls 50 boys D. 20 girls 24 boys D?

116. ## algebra

A submarine is 700 meters below the surface of the ocean. it is ascending at a rate of 35 meters every minute. What does x represent and What y represent

117. ## Physics

A basketball of mass 0.70 kg is dropped from rest from a height of 1.22 m. It rebounds to a height of 0.64 m. How much mechanical energy was lost during the collision with the floor? A basketball player dribbles the ball from a height of 1.22 m by exerting

118. ## CALCULUS

The masses of 10 books are found to be in an arithmetic sequence. If their total mass is 13 kg and the lightest book has a mass of 400 grams, what is the mass of the heaviest book? 2,000 grams 2,100 grams 2,200 grams 2,300 grams 2,700 grams

119. ## MATHS

A committee of two persons is selected from two men and two women. Find the probability that the committee will have at least one man.

120. ## math

Jerry invested $14,000 in a certificate of deposit at 5%. He also put$2,500 in a savings account at 3%. How much interest will he earn after one year?

121. ## Ph CHEM

A solution is found to contain 1 x 10-4 OH− ions, determine the pH of this solution. I did this problem and got 4 but it is not going in as correct. -log(1*10^-4)=4

122. ## Probability-plse

A committee of two persons is selected from two men and two women. Find the probability that the committee will have at least one man.

123. ## physics

What sound intensity level in dB is produced by earphones that create an intensity of 4.00¡¿10^-2 W/m^2?

124. ## Math

Jeremy drinks 2 pints of milk every 3 days How much milk would Jeremey drink in 60 days? A.20qt B.25qt C.30qt D.40qt D? The chart below shows the survey results for 50 students and their candy preferences There are 250 students at the Valentines Dance.

125. ## physics

A cylindrical 7.25 kg pulley with a radius of 0.864 m is used to lower a 7.13 kg bucket into a well. The bucket starts from rest and falls for 4.51 s. What is the linear acceleration of the falling bucket? The acceleration of gravity is 9.81 m/s^2.

126. ## precalc

For the equation 2x 3 - 11x 2 + 12x + 9 = 0, the root 3 has a multiplicity of _____.

127. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

128. ## College Physics

A satellite in an elliptical orbit has a speed of 9.00km/s when it is at its closes approach to the Earth(perigee). The satellite is 7.00x10^6 m from the center of the Earth at this time. When the satellite is at its greatest distance from the center of

129. ## Physics

A rocket of total mass 3100 is traveling in outer space with a velocity of 120 . To alter its course by 40.0, its rockets can be fired briefly in a direction perpendicular to its original motion.

130. ## calc

Convert theta= 225° to rectangular form.

131. ## Physics

Ocean waves pass through two small openings in a breakwater. This time the openings are d = 21 m apart. You're in a small boat on a perpendicular line midway between the two openings, L = 80 m from the breakwater. You row x = 32 m parallel to the

132. ## math

a system has a total mechanical energy of 350 J and kinetic energy of 220 J. what is its potential energy?

133. ## physics

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right. What can you conclude about the direction of motion of the object

134. ## calculus

A camera store sells 40 pairs of binoculars per week on average with a standard deviation of 6. What is the probability that the store will sell more than 52 pairs binoculars in any week? 8.28 3.57 7.24 2.28 4.55

135. ## Physics

Suppose there is a small hole (radius=0.0203) at the base of a large tank. If the height of water in the tank is 15m (a) what is the speed of water escaping through the hole? (b) Calculate the amount of water (in cubic meters per second) escaping the tank.

136. ## Chemistry

find the dry volume at STP of 500 mL of nitrogen gas measured over water at 15 degree C and 680 mmHg. the water vapor exerts a partial pressure of 12.8 torr at this temperature ( vapor pressure).

137. ## math

the temperature on a cold december morning fell from 37 degrees to -4 degrees. how many degrees did the temperature fall? Please explain answer

138. ## math

Maria ran 3 and 4/5 miles. She ran 1 and 2/3 miles further than Paul. Write the equation.

139. ## Math

Javon's class have 24 students.If 1/8 of them play the piano,how many of the student in his class play the piano?

140. ## CALC

A biased coin whose chance of heads is 0.4 is tossed five times in a row. What is the probability that heads is tossed exactly 2 times? 20.2% 23.04% 36.8% 40.1% 45.6%

141. ## Geometry:(

The surface of a rectangular prism is the sum of: the product of twice the length L and the width w the product of twice the length and the height h and the product of twice the width and the height. **** Write an expression that represents the surface

142. ## algebra

Light intensity(lumens) at a depth of x feet has the equation log I/12=-0.0125x what depth will the light intensity be half that of the surface

143. ## English

Baking is a major project for the holidays. Is the verbal baking? Is this a gerund or a participle and why? Baking in the oven, the bread smelled delicious. Is the verbal baking in the oven? Is this a gerund or a participle and why?

144. ## Math

You decide to make a scale drawing of your bedroom. YOur bedroom measures 12 ft. wide by 20 ft. long. If you are using an 8.5" x 11" paper, whate scale will you use. Explain.

145. ## math

Find the effective rate corresponding to the given nominal rate. (Round your answer to the nearest hundredth of a percentage point.) (a) 7%/year, compounded daily % (b) 6%/year, compounded monthly %

146. ## College Physics

Suppose a planet is discovered that has the same total mass as the Earth, but half its radius. Calculate the acceleration due to gravity on the surface of this planet.

147. ## Physics

Two banked curves on a highway have the same radius. Curve A is banked at 13 degrees and highway B is banked at 19 degrees. A car can travel around curve A without relying on friction at a speed of 18 m/s. At what speed can this car travel around curve B

148. ## physic

A force of 20 newtons is exerted on a chair from its right and a force of 12 newtons is applied from its left. What is the net force acting on the chair and in what direction will the chair tend to move?

149. ## physics

A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time required for decompression depends on the total change in pressure that the diver experienced. Find this total change in

150. ## physics

The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

151. ## calculus

What is the value of this expression when n approaches infinity? 4 −(4/n)+(5/n)+(15/3n^2) *its all one equation*

152. ## math

A bowl of fruit contains 4 apples, 5 oranges, and 3 bananas. In how many ways can 3 oranges be selected?

153. ## Chemistry

What is the general trend in the acidity of Period 3 oxides moving across the Periodic table from left to right? (Be sure to refer to the term acidity.)

154. ## precalculus

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) tan θ = - root of 3/3

155. ## Physics

A satellite in an elliptical orbit has a speed of 9.00km/s when it is at its closes approach to the Earth(perigee). The satellite is 7.00x10^6 m from the center of the Earth at this time. When the satellite is at its greatest distance from the center of

156. ## Physics

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

157. ## english

Is upset an action verb? Is were an conditional verb?

158. ## math

Find the accumulated amount A, if the principal P is invested at an interest rate of r per year for t years. P = $24,000, r = 7%, t = 6, compounded monthly$ ?

159. ## CHEM HELP

I asked this already but for some reason the answer I got isnt being accepted online Question: In the laboratory, 3.50 grams of salicylic acid were reacted with 7.20 ml of acetic anhydride (density equal to 1.08 g/ml). Determine the limiting reagent. I

160. ## Physics

A person jumps from a tower 5 m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70m. If the mass of his torso (excluding legs) is 50kg, find the force exerted on his torso by his

161. ## psych

1.21 (1 pts.) William is acutely retarded and requires intense care. His IQ has been measured at approximately 15. What term would be used to classify William's level of retardation? A) mild B) moderate C) severe D) profound # 1.22 (1 pts.) Shannon has

162. ## chemistry

What is Boyle's Law constant if a sealed rigid container with a volume of 650 mL has a pressure of 131.1 kPa ?

163. ## Grammar

A compound modifier acts as a _____ unit modifying a noun. A) compound B) coordinate C) plural D) single I answered D

164. ## math

Find three consecutive integers such that the square of the third minus the first is equal to 2 more than 5 times the second.

165. ## physics

A car moving with a speed of 85 km/h is brought to rest in a didtance of 60 m. How much time did the car take to stop?

166. ## Chem 2

Describe how to make 175mL of a .10M tin(II) chloride solution??

167. ## calculus

Find the point (x,y) on the curve y=sqrt(x+4) closest to the origin.

8x^2-18x-5

169. ## Chemistry

A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?

170. ## statistics

3. A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community service will have higher Christian maturity scores. The

171. ## science

Mendel realized that the principles of probability could be used to _______ the results of genetic crosses. What's the blank? please help! thanks a bunch!

172. ## Physics

An object (m=2.85 kg) is attached to a disk-shaped pulley. The diameter of the pulley is 0.242 and its weight is 7.272 N. Suppose the object is allowed to fall (a) What is its linear acceleration? (b) What is the angular acceleration of the pulley? (c) How

173. ## physics

A technician wishes to produce the lens +2.00DS/+2.00DC x90 in toric form, in CR39 with a -5.00 base curve. After finishing the toroidal surface with the CR39 tool it is discovered that, in error, they have used a plastics material of refractive index

174. ## Math: Algebra 1

2. What is the solution of the system? 7x + 5y = 19 –7x – 2y = –16 A.) (2, 1) B.) (1, 2) C.) (7, 5) D.) (–7, –2) I think it is A.

175. ## Physics

A 90N dog climbs up a non-uniform (lambda = Cx^(3/2)), 100N ladder. The top of the ladder rests on the top of a frictionless fence that is 3m high and forms a 30 degree angle with the ground, which is rough and has a coefficient of friction of 0.60. How

176. ## Geometry

Given: and mEGFÚ=60 mAGFÚ=‹90; Prove: mAGBÚ=‹30.

177. ## trigonometry

Find the magnitude of the resultant force and the angle between the resultant and each force: Forces of 2 lbs and 12 lbs at an angle of 60 degrees to each other.

178. ## math

a farmer had 24 animals. some of the animals were chicken and some were dogs. altogether there were 56 legs. How many of the farmer's animals were chickens and how many were dogs?

179. ## Exceptional Child

James wants a new toy. He says, "James toy". He is using: A. short sentences B. telegraphic speech. C. baby talk. D. holophrastic speech.

180. ## chemistry

An x-ray generator operated at a plate voltage of 7000 V is incapable of producing Ni Kα radiation. Calculate the minimum energy required for a ballistic electron to produce Ni Kα radiation. Express your answer in units of eV.

181. ## calculus

A machine on an assembly line fills cans with quantities of food that are normally distributed with a standard deviation of 0.057 pounds. The mean quantity filled is estimated using a sample of 100 cans. What is the difference between the upper and lower

209. ## chemistry

a. Find the amount of solute based on this information Volume = 500 ml Concentration of solution= 15% (w/w) Solute (molar mass) = H2SO4 is 98.0g/mol b. Find the molar mass Amount of solute= 117.0g Volume of solution= 2.00L concentration of a solution= 1.0M

210. ## math help

A male black widow spider is half the size of a female black widow spider. Together, they are 21 millimeters in lenght. How big is a female black widow? A male?

295. ## math

Only 40% of people between the ages of 18 and 24 read a daily newspaper. Write the percent as a fraction in simplest form.

296. ## college algebra

solve the following exponential equation. 7^x=8 a. x= Write in exact solution b. then with that answer move the decimal 3 points over

297. ## math

Find the present value of $26997.18 due in 3 yr at an interest rate of 10%/year compounded continuously.$?

298. ## math

Find the present value of $26997.18 due in 3 yr at an interest rate of 10%/year compounded continuously.$ ?

299. ## Math (trigonometry)

How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1

300. ## pre calc

If Sn represents the sum of the squares of the first n natural numbers, use proof by induction to find which of the following expressions for Sn is true? Sn=n(n-1)/(3) Sn=n(2n-1)/(3) Sn=n(n+1)/(3) Sn=n(n+1)(2n+1)/(3)

compare the following items from the past to the present.car stove telephone and washing machine

1. This term refers to a subject in artwork that has been simplified and rearranged. (1 point) nonobjective linear semi-abstract objective 2. This term refers to artwork that does not have a reference to a subject or object. (1 point) representational

303. ## college algebra

use the properties of logarithms to find the exact value of the expression loglower 3^18 - log lower3^6 **how do I make the three lower in the log equation?

304. ## Physics

A cylindrical carnival ride is spinning with a frequency of 0.5 Hz in a circle of radius 3 m which allows a 60 kg person to “stick” to the side of the ride as it spins. T = 2s v = 9.42 m/s A) Find the normal force exerted on the person. B) What

306. ## Algebra

Please help asap, (Question) he length width of a rectangle are in the ratio 3:2. The perimeter is seventy-three centimters.

307. ## MATHS

Find the area of the region bounded by the curve of sin x between x = 0 and x = 2π.

308. ## math

Beth Pittman earns $12,558 per year. She is paid 52 times per year and claims 2 exemptions. If$8.85 in taxes is withheld from each paycheck, at what rate is she taxed?

309. ## science

what is the alelles for 3 tall plants and 1 short plant that are offsprings and have both tall parent plants?

310. ## pre calculus

janet worked on a garden shaped like a triangle with a base that is 5 m less than twice the height. If the area of the garden is 90 m^2, how long is the base and the height?

311. ## Grammar

A compound modifier acts as a _____ unit modifying a noun. A) compound B) coordinate C) plural D) single I answered D

312. ## Math

There are 18 green blocks in a bag THere are 3 white blocks for every 2 green blocks Which proportion can be used to find w, the total number of white blocks in the bag? A.18/w=3/2 B.18/w=2/3 C.3/18=2/w D.2/3=w/18 How do I solve

313. ## physics

An open-topped tank completely filled with water has a release valve near its bottom. The valve is h = 1.9 m below the water surface. Water is released from the valve to power a turbine, which generates electricity. The area of the top of the tank, A_T, is

314. ## Physics

A cubical object of sides 5 cm is immersed completely in water. What is the force of buoyancy on the object? (Assume g = 10 m/s2)

315. ## math

how many terms are there on a 1/2 (a+b)? and are they monomial or binomial?

316. ## Chemistry

Suppose I put 1 billion bacteria in a 10 ml tube of saline, mix well, and label this tube A. Answer the following questions: 1. Take 1 ml from tube A and put it in an empty tube B. What is the concentration and number of bacteria in tube B?

317. ## English

Reach each sentence if it is correct write c. if it has an error in commas, put the word in () that should be followed by a comma and add the comma The cafeteria is serving chicken soup vegetable stew, or chilli. chicken soup in () and a comma after soup

318. ## Grammar

A compound modifier is hyphenated when it comes directly after the noun it modifies. A) True B) False I answered B

319. ## English

Read each sentence. Identify the comma error and put Add or Omit on the line to show how to correct the sentence. Then put the word in () before the error That shiny sleek car is new shiny add Courtney brought a delicious ham turkey, and beef sandwiches

320. ## English

I want to put these words in a sentence that makes sense. Many will think that my voice doesn't matter for people my age. It doesn't sound right to me.

321. ## Grammar

“Follow up” is never a verb. A) True B) False I answered F

322. ## math

what is the equivalent of 1/5?

323. ## Physics

Two fraternities are in a tug of war. Theta Chi is pulling with a total force of 4,748 newtons to the east and Tau Kappa is pulling with a total force of 3,969 newtons to the west. What is the magnitude and direction of the resultant? Which team will win?

324. ## math

Find equation of the line that passes through the points (2/3,-5/4) and (-3,-5/6). write your answer in slope-intercept form and standard form with integer coefficients.

325. ## Math

if the lateral surface area of a regular square pyramid is 200 inches square how do I find the volume?

326. ## algebra

a five digit number that follows the pattern:if you put a 1 after it the number is three times as large as it would be if u had put a 1 before it

compare the following items from the past to the present.car stove telephone and washing machine

328. ## calculus

Which is the sixth term in the expanded form of this binomial? 14(x)^3 280(x)^2 280(x)^3/2 672x 448x

329. ## English

Please help i need to put this sentences in order and combine them in order to make sense. 1. The pizza sits on the table. 2. It is fresh from the oven. 3. It is in the middle of the table. 4. Its crust rises up. 5. The crust is thick. 6. The crust is

a helicopter blade spend 775 times in 3 mintues find the rate in revolutions per second

331. ## calculus

Simplify the expression: tan(-x)csc(x)

332. ## calculus

If Sn = 1 + 6 + 11 + 16 + 21 + 26...... where an = (5n − 4), what would be the mathematical expression represented by Sk + ak + 1?

333. ## Grammar

The colon is a frequently used mark of punctuation that is used in a large variety of cases. A) True B) False I answered A

334. ## Psychology

I need to do a presentation on gender development. We're supposed to have an activity that presents the topic or ties into the topic. I have searched the internet, but have not come up with anything for gender development specifically. Does anyone have any

335. ## math

Home work help plz a)what would be the cost of the activity in the first week b)what would be the cost of the activity each subsequent week Mrs ogden has heard about aqua aerobics from her sister in law. she wants to join her sister in law and her friends

336. ## math

pedro swam some laps in the pool and then swam 2 more.... algebraic expression

337. ## Algebra

The perimeter of rectangle is 62 m. If the width were doubled and lenght were increased by 9 m, the perimeter would be 104m. What are the lenth and width of a rectangle?

338. ## chemistry

how would you prepare 250 mL of a .1 M C12H22O11 starting with 2.5M C12H22O11

339. ## ELA

I need a few suggestions of store names. Its a grocery store in Manhattan. Thx

340. ## college algebra

write the expression as a single logarithm In(x/x-2)+In(x+2/x)-In(x^2-4) Please show work

341. ## Geometry

Isosceles triangle base is 7 more than one-half times the legs. Perimeter is 22 centimeter Find length of each leg

343. ## Math

What is 23 times 17 in arrays and algorithm

344. ## Sociology

I need help identifying a country. In the 1980’s Country an introduced changes that were intended to change the country’s rural areas. Most subsidies for agriculture were eliminated, including subsidies for agricultural inputs such as seeds and

345. ## Social studies

what was the formal name for our country?

346. ## math

Yuki's age is four years more than one-fourth of Xena's age. Xena's age is 21 years and 6 months more than seven-eighths of Yuki's age. How old are Xena and Yuki?

347. ## chemistry

How would student make 500mL of .08500 M solution of iron using stock solution of .3180 M in iron(III)?

348. ## math

how many minutes are there in 6 hours and 45 minutes

349. ## Algebra 1B Chapter 10

I'm reclassified but I'm still a 10th grader and the only class I need to take is Algebra1B So here's the problem. I'm 1990, the town of Belgrade, Montana, had a popuof of 3422. For each of the next 8 years, the population increased by 4.9% per year. a.

350. ## chemistry

Explain the effect of molecular polarity on behavoir

351. ## Genetics

starting with 1000 copies of a template, 35 cycles of PCR were performed. What is the theoretical yield of copies of double stranded product of this amplification reaction?

352. ## maths

Let A, B and C be the sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C. Show that B = C.

353. ## Algebra 1

What is 5x cubed over x squared multiplied by 3x to the fourth power over 6x?

354. ## English

Write the word that should be followed with a comma We hiked across town, through the woods and into the cave. woods? Tiffany, Christina and Paige are down the hall in Room 101 Christina? Do you want to go to the park, to the beach or to the parade? beach?

355. ## Grammar

If the word “very” or an adverb that ends in “ly” is part of your compound modifier, you do not use a hyphen in the compound modifier. A) True B) False I answered A:)

356. ## calculus

Which of the following is NOT a solution to cos^2 x = 3sin^2 x? 30 60 150 210 330

357. ## physics

An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the horizontal distance the arrow will travel before hitting the ground.

358. ## CHM

How to balance the following equation: Na(s) + H2O(l) yields?

359. ## English

Combine the sentences below into a brief paragraph,using clear and efficient language.Remember that each sentence contains some information that is essential to the meaning of the overall paragraph; do not omit any necessary details. When you have

360. ## Maths

Point P(-8,-3)and Q(6,9)are joined by a straight line.Find the equation of the line joining the midpoint of PQ to the origin.

361. ## Chemistry

A 335g block of copper cools from 95.0 degrees celcius to 27.2 degrees celcius when it is put in a beaker containing water at 22.4 degrees celcius. What is the mass of the water in the beaker?

HOW MANY TIMES MORE IS 2000 THAN 20?

363. ## Chemistry

What is the mass of a sample of material that has a volume of 51.1 cm3 and a density of 6.31 g/cm3?

364. ## Geology

Which of the three rock families occurs most in new York state?

366. ## Trigonometry

How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.

367. ## math

Write the expression thrice the sum of m and 8

368. ## social studies

Greenland and new guienea are two islands with the largest land areas in the world. To which hemipshers do they belong

369. ## Math (5th grade )

Kathy's mom has made a batch of lemon bars. Her treats are in a rectangular pan that measures 12" x 8". She will cut a vertical and horizontal live every 2 inches along the length and width of the pan. How many bars will each person receive

370. ## Physics

A point source is generating circular water waves. (a) What does the amplitude of the wave near the source depend on? (b) What happens to the amplitude of the wave as it spreads outward? (c) Why the amplitude of a wave changes as it spreads outwards?

371. ## math

For a normal curve, what percentage of values falls beyond two standard deviations from the mean? A. 5.55% B. 4.55% C. 10.55% D. 12.55% E. 13.11%

372. ## Chemistry

Calculate the pH of 30.0 mL of 0.025 M NaOH

377. ## geometry

A rectangle has a perimeter of 114m and an area of 807m^2. What are the dimensions?

378. ## math

what is the mean of 33,36,39,45,29,58

379. ## Physics

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

382. ## maths

if 59,51,76,3,6 were numbers as total and 84,88,35,62,18 were machine produce what will be the next 5 out come numbers.if we are selecting from 1 to 90.

383. ## Math

If you get a confidence interval of (42,58) what is your margin of error?

384. ## Physics

What is the frequency of a sound wave in air at 20°C that has a wavelength of 0.4 m?

385. ## English

Please help me figure out what I got on my exams, am kind of worried!Please tell me if I am passing! Thank you! I got 113of 250 on my first exam. 113/250*100=.204304 is this right? Second exam: 120/250*100=.2304 is this right? Thank you!

386. ## algebra

what should be the equation of the line in standard form that passes through (4,6) and is parallel to the line where equation is y=2/3x +5?

387. ## Maths

Given the quadratic function y =3x^2+10x-8 (i)Find the y-intercept. (ii)Find the x-intercept. (iii) Calculate the axis of symmetry. (iv)Find the coordinates of the vertex (v)Sketch the graph of the above function.

388. ## chemistry

is water hard or soft if it contains 1.8 moles

389. ## English

Read each sentence COrrect any misplaced or missing commas. Rewrite the sentence. The old restored building is downtown. The old,restored building is downtown. THe moody grumpy boy is Chris. The moody,grumpy boy is Chris. Alyssa brought those, delicious

390. ## Phoenix

Why do you think Windows is so prevalent? What do the other systems have to offer that Windows does not? Who uses the other systems?

391. ## English

What would be an example of using one analogy and one idiom in a paragraph.

392. ## MATH

HOW MANY TIMES LESS IS 400 THAN 4 MILLION???

393. ## math

hi, i don't understand the homework that says show how to make one adden a ten. example: 38+26= Thanks

394. ## Physics

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker

395. ## calculus

What is the first natural number that causes the statement 1 + 3 + 5 +... + (2n − 1) 4n − 1 to fail? 2 3 4 5 6

396. ## English

Is planned a condition or action verb? Is shower a condition or action verb? Is wears a condition or action verb?

397. ## trig

If tan y = -4/3 and y is in Q I'VE find cos 2y

398. ## pre calc

What is the first natural number that causes the statement: (2 + 3)^n **less than equal to sign** 4^n + 3^n to fail? 1 2 3 4 5

399. ## math

what dimensions would make a box that has a volume of 27? show how you came up with it?

400. ## algebra

f(x)=square root of 5-x and g(x)=x^2+2x a- find g(f(-1)) b-f(x)/g(x), state the domain, then evaluate for x=3

401. ## spelling

i cant understand v/cv and vc/v patter mean .can you giv me exemple

402. ## math

Find equation of the line that passes through the points (2/3,-5/4) and (-3,-5/6). write your answer in slope-intercept form and standard form with integer coefficients.

403. ## statistics

Find the t dcore you would use for an 95% confidence interval. 80 students,72 average, 4 standard deviation.

404. ## maths

if cosx=-1/2,x lies in third quadrant, find sinx.

405. ## math

how do i make a story problm with a ratio table and awser it

406. ## Math

Write 91, 008.34 in word form.

408. ## math

a ship sail S 40 degrees W four 4 hours how do i figure out this question

409. ## English

Read each sentence then write which word should be followed by a comma My dog has a collar, a leash and several toys. leash? Waldo dashes through the house out the door, and around the yard. house? Luis walks hiss doing in the morning, after school and

410. ## ENGLISH

hi ive been reading a book called, the berlin boxing club, and one of my hw assignments say i need to find 10 quotes in the book and im having trouble finding them. can u please help me? :)

411. ## math

Can 0/3 + 3 be simplified? Can 10m + 1 / 10 be simplified?

412. ## Math

name the property and explain 26×(2×8)=(26×2)×8

413. ## CHEMISTRY

Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may

414. ## trig

If tan y = -4/3 and y is in Q I'VE find cos 2y

415. ## English

Read the sentence. Rewrite each sentence adding the comma needed after the introductory word, phrase, or clause. Besides I don't like your idea for the project. Besides, I don't like your idea for the project. Throughout the class I kept sneezing

416. ## Geology

What observable characteristic is present with banding of metamorphic rocks that is not present in the layering of clastic sedimentary rocks?

417. ## world history

Which of the following was not an innovation that came about due to militarization in the 1800s?

418. ## math

how do you divide 1.0 divided by 0.02

419. ## math

How do I convert 5sq.yd. to sq.ft.

420. ## science

3. Describe each stage of the flow of information starting with DNA and ending with a trait

421. ## math

find the 6 trigonometric functions of tan (-3/8): sin < Ø

422. ## PreAlgebra

Volume of a cube with side length of 26.4 meters I need this by 11/21/12 ASAP

423. ## math

how many times less is 400 than 4 million; explain

424. ## Math

1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the

426. ## math pls help Ms Sue

Find the rule for the function table m n 15 12 10 8 5 4 0 0

427. ## algebra

an 80 pound bag of concrete cost \$4 and covers 2.5 square feet how much will cost to cover 504 square feet

428. ## math

(76-12)-(48divided by 8)2

solve the following logarithmic equation 2log2(lower than g)^(x-2)+log2^2=3 x=?

430. ## science

what is the alelles of a tall plant.

431. ## Algebra 2

Energy Use Light Output 35 2250 50 4000 70 5800 100 9500 150 16000 What is the quadratic model for the light output with respect to use energy use? I don't understand this at all Please help ):

432. ## math need help urgent

find the domain f(x)=x/x-8,g(x)=-7/x solve the following exponential equation equation exact answers only 3e x-1 = 2+e^x-1

i need help

434. ## algebra1

M5P3*(2M-6Q-5)-1 qm0

435. ## math

estimate each quotient 246.78/83?

436. ## math

Find the rule for each function table m n 15 12 10 8 5 4 0 0

437. ## math

how do you get the percent of 1 over 12

438. ## stats & prob.

Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.

439. ## Maths

State the x-intercepts of the graph of y=1-x^2

440. ## math

what number is 33% of 500?