# Questions Asked onApril 29, 2012

1. ## college physics

Superman must stop a 190-km/h train in 180m to keep it from hitting a stalled car on the tracks. part a)If the train's mass is 3.8×10^5kg , how much force must he exert (find the magnitude)? part b)Compare to the weight of the train (give as %). partc)

2. ## physics

question : net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?

13. ## physics

Rank the beat frequency from highest to lowest for the following pairs of sounds:a. 876 Hz, 871 Hz b. 786 Hz, 784 Hz c. 721 Hz, 728 Hz d. 542 Hz, 541 Hz

14. ## area and volume

A balloon has a circumference of 22in. Use the circumference to approximate the surface area of the balloon to the nearset square inch. possible answers; 154in^2 616in^2 1,521in^2 484in^2 Find the volume of the square pyramid.Round to nearest tenth if

15. ## Physics

A balloon rubbed against denim gains a charge of −2.0 µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.) The value of the Coulomb

16. ## physics

What beat frequencies are possible with tuning forks of frequencies 258, 263, and 267 Hz?

17. ## math

Terry, Barry, Larry, Jerry, and Perry are lined up in these positions midway through a track meet: Terry is 20 meters behind Barry. Barry is 50 meters ahead of Larry. Larry is 10 meters behind Perry. Jerry is 30 meters ahead of Terry. Perry is 50 meters

18. ## science

an empty density bottle weighs 25 gram. when completely filled with water, it weighs 55 gram and when completely filled with a liquid, it weighs 52 gram. calculate volume and density of the bottle.

19. ## kinetic theory

Air is filled at 60deg C in a vessel of open mouth. Upto what temperature should the vessel be heated so that one-fourth of the air may escape? Ans 171degC

20. ## Math

Luis has $150,000 in his retirement account at his present company. Because he is assuming a position with another company, Luis is planning to "roll over" his assets to a new account. Luis also plans to put$3000/quarter into the new account until his

21. ## physics

An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, and a slender metal handrail. The speeds of sound in air, water, and the handrail are 355, 1410, and 5380 m/s,

22. ## science

write a skeleton equation for this reaction hydrogen iodide(g)->hydrogen+iodide(G)

23. ## physics

Imagine a Rip van Winkle type who lives in the mountains. Just before going to sleep, he yells, "WAKE UP", and the sound echoes off the nearest mountain and returns 7.6 hours later.Find the distance between Rip and the imaginary mountain.

24. ## Math

a young Colorado spruce tree is growing at a rate of 20 cm per year. Currently, it is 244 cm tall. A 300 cm tall white spruce tree is growing at a rate of 12 m per year. In how many years will the two trees be the same height? Solve algebraically

25. ## math

An arithmetic series has a first term 8 and third term 20. What does the fifth term equal? What does the second partial sum equal?

26. ## chemistry

calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

27. ## physics

Light has a maximum constant speed in which of the following? A) water.B) red glass.C) the upper atmosphere.D) clear glass.E) between the atoms in glass, water, or the atmosphere. IS THIS C THE UPPER ATMOSPHERE?

28. ## Physics

A small cork with an excess charge of +6.0 µC is placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in units

29. ## Chemistry

Write the IUPAC name for straight-chain hydrocarbon with this formula: CH3CH2CH2CH2CH2CH2CH3 Write the IUPAC name for any branched-chain hydrocarbon with this formula:C9h20

30. ## statistics

The mean length of a work week for the population of workers was reported to be 39.2 hours. Suppose that we would like to take a current sample of workers to see whether the mean length of a work week has changed from the previously reported 39.2 hours. a.

31. ## algebra

Is it possible for a degree-4 polynomial P(x) to have only complex (no real) roots

32. ## statistics

Lorraine was in a hurry when she computed a confidence interval for . Because was not known, she used a Student's t distribution. However, she accidentally used degrees of freedom n + 1 instead of n - 1. v Will her confidence interval be longer or shorter

33. ## calculus

A tight rope is stretched 30 feet above the ground between the Jay and the Tee buildings, which are 50 feet apart. A tightrope walker, walking at a constant rate of 2 feet per second from point A to point B, is illuminated by a spotlight 70 feet above

34. ## high school diploma

what correction should be made to this sentence? one of the lifelong memories many of us share are the moment we obtained a driver's license?

35. ## MATH

A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one revolution

36. ## biology

Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions.

37. ## Life Orientation

Critically discuss 8 ways in which the environmental problem impact on the community or any other community in South Africa.

38. ## algebra

x^2 +4x +9y^2 -36y +4=0

39. ## Chemistry - Kp

What is the Kp for the following reaction: 2NH3(g) --> N2(g) + 3H2(g) This reaction is contained in 1.0 L container at 1,000 K and has reached equilibrium. (Kc = 4.0 x 10^-2). You have initially added 1,220 moles of NH3(g) in the flask.

40. ## Algebra

The formula for the volume of a cylinder is: V=πr^2*h If the volume is 432 cubic inches and the height is 8 inches, solve for the length of the radius.

41. ## Chemistry

A 1.00 L flask containing the equilibrium mixture CO +Cl2 COCl2 was found to contain 0.400 mol of COCl2, 0.100 mol of CO, and 0.500 mol of Cl2. If 0.300 mol of CO is added at constant temperature, what will be the new concentrations of each component at

42. ## spanish

¿Cuál frase es correcta? El hijo del maestro, quien estuvo en mi clase, es muy inteligente. El hijo del maestro, a quien estuvo en mi clase, es muy inteligente.

62. ## MATH

A rectangle pen for a pet is 5 feet longer than it is wide. Give possible values for the width W of the pen if its area must be between 266 and 750 square feet, inclusively. The width of the pen from the smaller value of the width is how many feet to the

63. ## biology

Initially, how do skeletal muscles (the type of muscle attached to bones) make ATP? write the reaction for this procss (Crp +ADP => Cr + ATP) as a 'coupled' reaction, identifying the exergonic and endergonic reactions. what would this type of ATP

64. ## Life Orientation

Suggest 5 recommendations on how to address the environmental problems that you have identified in the previous question

65. ## math

if 1 centimeter on a map repesents 10 kilometers then 6cm represents how many km/

66. ## Life Orientation

Describe the lifestyle disease cancer

96. ## Probability and Statistics

The school superintendent would like to estimate the proportion of adults in the country that are in favor of an increased emphasis on the basics of education. A randomly selected sample of 150 adults found that 107 of them would favor an increased

97. ## chemistry

A 115 mL sample of a 10.0 M ethylene glycol (C2H6O2) solution is diluted to 1.30 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.) What is the boiling point of the final solution? How would I go

98. ## pre algebra

The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.6% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

99. ## math

there are 122 houses,how many times does the digit 2 appear on the letterboxes?

100. ## Programming logic

Finding the bugs. // Each time a salesperson sells a car at the Pardeeville New and Used Auto Dealership, // a record is created containing the salesperson’s name and the amount of the sale. // Sales of new and used cars are kept in separate files

101. ## algebra

Y=3X^2+9X-1 what are the x and y intercepts? Please!

102. ## Chemistry

How much heat is either ______(absorbed or given off) when 91.45g of HI decomposes to H2 and I2 at 25 degrees C? What goes in the blank and how much heat? Thanks!

103. ## statistics

a random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of$29.97

104. ## math

there are 3 arrays for 4, how many arrays can be drawn for each prime numbers

105. ## spanish

Escribe el cual (la cual, los cuales, las cuales) o lo cual en el espacio. Nos invitaron a cenar con ellos, ____ fue una buena idea.

106. ## statistics

a random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of$29.97 a. Find a 95% confidence interval for the mean price of all summer sleeping bags. b. what is m i.e., what is the margin

107. ## History-world war 1

In the mind of germany, what could have been some possible peace proposals so world war 1 would not have occured?

108. ## Probability and Statistics

The PGA would like to test to see if there is any difference in the distance produced by Titleist and Maxfli brand golf balls. A sample of 36 Titleist golf balls produced x1bar = 292ft, s1=16ft, while a sample of 48 Maxfli golf balls produced x2bar =

109. ## MATH

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the

110. ## Economics

In 1000 BC, the Chinese people used Cowry shells as a method of currency. Why is this significant?

111. ## chemistry

Substance X has a molar extinction coefficient (E) of 4725 l.mol-1 cm-1. How many micromoles of X are needed to produce an absorbance of 1.0 in a 1 ml cuvette?

112. ## physics

Consider a wave that travels a distance of 3 meters in 1 second with a frequency of 2 hertz. What is its amplitude? A) 4 meters.B) 2 meters.C) Not enough information is given.D) 3 meters.E) 1 meter.

113. ## calculus

Find the area of the region enclosed by y=6x2 and y=x2+15

114. ## Probability and Statistics

The major would like to estimate the mean number of automobile crashes per day at the intersection of 2 highways. A random sample of 40 days worth of data had a mean of 4.3 crashes and a standard deviation of 0.9. How large of a sample would be needed in

115. ## calculus

Find the area enclosed between f(x)=05x2+3 and g(x)=x from x=−8 to x=3.

116. ## Manigerial Accounting

This is an extra credit assignment I was assigned that I really need the points for. I am having alot of trouble with it. I did a few of the questions but im not sure if they are right or not and I don't know how to do a few. For number 1 (Listed below)

117. ## Maths trig

Use compound angle formulae to express Second harmonic i2= sin2t and the the third harmonic i3=sin3t in terms of the first harmonic sint

118. ## statistics

A widget factory's worker productivity is normally distributed. one worker produces an average of 75 widgets per day with a standard deviation of 20. another worker produces at an average rate of 65 per day with standard deviation of 21. 1)what is the

119. ## Chemistry - Kp

What is the Kp for the following reaction: 2NH3(g) --> N2(g) + 3H2(g) This reaction is contained in 1.0 L container at 1,000 K and has reached equilibrium. (Kc = 4.0 x 10^-2). You have initially added 1,220 moles of NH3(g) in the flask.

120. ## calculus

Find the volume of the solid formed by rotating the region enclosed by y=e2x+1y=0x=0x=09 about the y-axis.

121. ## Pre-calc

Heres the equation y^2 -4x^2 +8x=20 For the center i got (-1,0) For the vertices i got (-1,4), (-1,-4), (1,0), (-3,0) And how do you find the foci?

123. ## Economics

You bought the bond for $1,040, after 6 months you received a coupon of$35 and after another 6 months you received another $35 coupon and you sold the bond for$1,070. What would be your total dollar return in that case? What would be your total

124. ## biology

In some dogs, long hair (L) is dominat over short hair (l), and wavy hair (W) is dominant over straight hair(w). Draw a cross between a dog that is homozygous for long hair and straight hair with a dog that is homozygous for short hair and wavy hair. What

125. ## math

each bead has a value according to its color how do you finnd the value of the beads

159. ## biology

how does the REM help create a sleep signal sent from the pons in the brain that helps to stop motor neurons in the spine when a person sleeps. Please help me! I am looking for detailed information right down to the certain proteins and such! I have

160. ## Math

1)Use the definitions sin0(theta) = y/r, cos0(theta) = x/r and/or tan0(theta) = y/x to prove that cot0(theta) = 1/tan0(theta) 2)For all 0(theta) prove: a)cos(t) = 1/sec0(theta) b. sec(t) = 1/cos0(theta)

161. ## physics

how much must a car produce to drive 150 km if an average force of 500 N must be maintained to overcome friction?

162. ## math aig

Tyrone rounded 23.94 to 24.How did he round? A to the nearest hundredth B to the nearest tenth C to the nearest one D to the nearest ten my answer is c am i right.

163. ## chemistry

if 180 grams of ice at -123 degrees celsius is heated to steam at 125 degrees celsius, how much energy would it take?

164. ## life orientation

Identify and describe one environmental problem that causes ill health,accidents,crises and disasters within your community or any other community within South Africa or globally?

(d+7)^2=0

166. ## critical thinking

Homework Help: critical thinking Posted by long on Thursday, March 8, 2012 at 1:53pm. Read the scenario. Using the information provided in the references and lesson, arrive with your best possible solution. You are a squad leader in Sapper platoon, Special

167. ## ALGEBRA

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) $300 balance, 18% rate,$250

168. ## physics

Two projectiles A and B are projected at the same time in the same vertical plane. A is projected at a height of 2m above the ground making an angle of 30deg with the horizontal. B is projected with the velocity of 20m/s at an angle of 60deg with the

169. ## statistics

if the null hypothesis is that the mean is 3218, the alternative hypothesis is that the mean > 3228, and the sample mean is x= 3342, the sample standard deviation is s=287, the sample size is n= 42, and α= 0.01 a. calculate the z test statistic. b. what

170. ## Freshman English

Can someone summarize To Kill a Mockingbird for me? I still don't get it.

171. ## projectiles

two children ride bicycle towards each other with instant velocity of 20m/s and 10m/s. Each child releases a ball 6m above the ground with forward horizontal velocity of 40m/s relative to the bicycle. if the two balls collide in above the ground. what was

182. ## physics

Rank the speed of sound through the following from greatest to least:A. HeliumB. Benzene C. Mercury

183. ## chemistry

a salt solution is evaporated to dryness. If 25.7 g of the solution leaves 1,949 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution

184. ## Mechanics (M1) A level?

A block moves on a rough slope of length 10 m inclined at 30 degrees to the horizontal. The coefficiebt of friction between the block and the slope is 0.4. The block starts from rest at the top of the slope. a) Find the speed at which the block reaches the

200. ## finite

1. Alabama State University’s Bookstore has determined that the supply function for a certain author’s newest book is p = (1/300)q + 13. The demand function for this book is p = -.03q + 19. Graph both demand and supply functions on the same set of

201. ## British Literature

John Ruskin illustrates a direct correlation between the decline in morality and the pollution visible in his world in “The Storm Cloud of the Nineteenth Century.” Illustrate this principle in action by utilizing between two and four of the texts we

202. ## geometry

Find the coordinates of the center and the radius of a circle with and equation of: a. x^2 + 2root7x +7 + (Y-root 11)^2 =11 b. x^2 -12x + 84 =-y^2 + 16y

203. ## psychology

Discuss the biological consequences of stress as outlined by psychoneuroimmunologists. thank you

204. ## Calculus 3

find the curvature of r(t) = at the point (1,0,0)

205. ## chemistry

The combustion of propane is given by the following reaction: C3H8 (g) + 5 O2 (g) ---> 3 CO2 (g) + 4 H2O (g) If 5.00 L of propane are burned in in the presence of excess O2, how many liters of carbon dioxide will be formed?

206. ## Algebra

a farmer wants to enclose a rectangle garden using the sides of her barn as one side of the rectangle. what is the maximum area which she can enclose with 60ft of fence? what should the dimensions of the garden be to give this area? Max area which she can

Calculate the concentration of HCO3- in an aqueous solution of 0.0885 M carbonic acid, H2CO3 (aq). I was going to set this up as 0.0885 -x = ? Am I suppose to use the Ka value for carbonic acid?

208. ## Help W/ Definite Integrals

Evaluate the definite integral of (4x^3-x^2+2) from 5 to 2. Can someone please explain what I'm being asked to do? My book is not clear on this concept.

209. ## Math -Urgent!!!

List all the possible rational zeros of f(x)=3x^3-x^2+2x=2. Please help me. I don't understand how to do this. Can someone show me please.

210. ## chemistry

How can you prevent or stop eutrophication

211. ## no

Mendez invested Dhs ------------------ cash and Equipments ------------------------- in the business. 4 Purchased land costing Dhs ------------------------ for cash. 8 Incurred advertising expense of Dhs -------------------- on account. 11 Paid salaries to

212. ## Algebra/still clueless

The length of a triangle is twice the width. The area is 2yd^2. Please, find length and width and simplify. Should I convert the yards? :-)

213. ## Algebra

-4x+1-2(x-1)= -4(x-4)

214. ## Geography Help??

show how society and family life compare and contrast in the Pacific Rim? I don't need an answer, just an explanation please. I don't know what that means..

215. ## Algebra 2

A package with square ends has combined length and girth(girth is perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of the package. s in. * s in.* l in. One solution is: 11.08in. *

216. ## Life Direction

three parts of Life Direction

217. ## math

Given A = {5, 6, 7}, B = {3, 4, 5, 6}, and C = { 4, 5, 6, 7}. Evaluate each set A ¿ B b) A U C c) B U C d) (A U B) ¿ C e) A U (B U C) f) (A ¿ B) ¿ C g) (A ¿ B) U C

218. ## math

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=0, y= \cos(x), x = \frac{\pi}{2}, x = 0 about the axis y= -3 You might need to use the identity: cos^2(x) = \frac{1}{2}(cos(2x) + 1).

219. ## math

Find the equation for the surface formed by rotating (x = 3*cos(y)) about the y axis. Your answer must not contain radical symbols (square root signs).

220. ## Chemistry

50.0mL of 0.01M Ba(OH)2 is added to 150.0mL of 0.01M HNO3. What is the new pH of the solution?

221. ## math

Find the equation for the surface formed by rotating (x = 3*cos(y)) about the y axis. Your answer must not contain radical symbols (square root signs).

222. ## math

Suppose that z(x,y) may be defined implicitly by {x}^2 - {y}^2- {z}^2 = 16, enter inequalities for the domain (x and y values) and the range (z values).

Can you write them in Mathematical/numbers form I'll solve them myself. i don't really get it though i have written the first one in mathematical for but i'm not sure if that's right. 1. When six is subtracted from five times a certain number, the result

224. ## science

how can concentration of Cl- in mixture of two chlorides be calculated given concentration of the chlorides

225. ## Chemistry

Calculate the concentration of H+(aq) and the concentration of OH-(aq) for the following solution with the following pH at 298K showing all your working. pH = 3.20

226. ## Algebra

Determine the comparable interest rate for a $60,000 loan when the quoted information is 10.7% + 0.5 pt +$200. (Round your answer to two decimal places.

227. ## Calculus

Consider the area between the graphs x+1y=12 and x+8=y2 . This area can be computed in two different ways using integrals First of all it can be computed as a sum of two integrals Interval a to b f(x)= i put 12-x but it's wrong Interval c to b f(x)= i put

World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s^2 . Part a)How much horizontal force F must a sprinter of mass 60kg exert on the starting blocks to produce this

229. ## Physics

a 1.5kg cannon is mounted on top of a 2.0kg cart and loaded with a 52.7 gram ball. The cannon, car, and ball are moving forward with a speed of 1.27m/s. The cannon is ignited and launches a 52.7 gram ball forward with a speed of 75m/s. Determine the

230. ## geometry

What is the formular for the exterior angle of a regular polygon

Point N is on hypotenuse BC of triangle ABC such than angle CAN is 45 degrees. If AC=8 and AB=6, find AN.

asked by My Name Is Bob
232. ## geometry

in segment pt, l is the midpoint of pa and a is the midpoint of pn. if pn = 17 and la = 3.5, what is the length of nt?

233. ## Physics

Philadelphia Flyers player Mike Richards stands on the frictionless ice next to the goal. Neither Mike nor the goal are anchored to the ice. Frustrated after a recent playoff loss, 102.5kg Mike suddenly pushes on the goal, sending it across the ice a

234. ## economics

could you calulate the total, average variable, and average cost, when a company marginal cost of production is $5.00 per unit and fixed costs are$20.00

235. ## Physics

In an unusual return to space, Astronaut Sally Ride is conducting repair work on the Hubble Space telescope. She throws a hammer of mass 500.0g forward at 20.0m/s. The astronaut, mass 80.0kg, recoils in the opposite direction. What is Sally's recoil

236. ## physics

Frequency and period are related, in that they are which of the following?A) inverses of each other.B) None of these.C) both on the same wavelength.D) directly proportional to each other.E) two expressions for much the same thing.

Question #1 A 0.140kg- baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 14.0cm . What was the magnitude of the average force applied by the ball on the glove? question #2 How much tension must a

238. ## Physics

The mass of a rocket car plus fuel is 2,000kg. The rocket car starts from rest. The engine expels fuel(in the form of exhaust) over a period of 8 seconds. The exhaust has a velocity of 1,000m/s due west, and the velocity of the rocket car after 8 seconds

239. ## economics

Give a numerical example to show that a monopolist's marginal revenue can be upward-sloping over part of its range. Hint: The price on the demand curve is the producer's average revenue

240. ## Linear Algebra - Question

I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)

241. ## Life orientation

Provide recommendations on how to address the human orenvironmental problem that you identified in the previous question.

242. ## life orientation

explain 5 factors that contribute to the substance abuse

243. ## Physics- Final exam review

A proton with kinetic energy 100 keV is moving in a plane perpindicular to a uniform magnetic field of magnitude 2.3 T. Find the radius of its orbit. Not sure what equation to use or how to solve

244. ## economics

find the uniform price if there is two customers: Type A who will only pay 10.00 dollars for a single unit of the good, and Type B who will only pay 8.00 dollars for a single unit of goods. There is 100 customers of Type A and 50 of the customers of Type

245. ## physics

Beats in sound are the result of which of the follwing wave? A) resonance.B) refraction.C) reflections.D) amplitude changes.E) interference

246. ## Science

Vanessa pushes a box with 50 N of force. The box accelerates 2 m/s2 for 10 seconds. What is the mass of the box?

247. ## economics

Give a numerical example to show that a monopolist's marginal revenue can be upward-sloping over part of its range. Hint: The price on the demand curve is the producer's average revenue

248. ## Probability and Statistics 2

The numbers below represents heights (in feet) of 3-year old elm trees, where leaves represent fractional parts of each value. Stems Leaves 5 1,8 6 1,2,4,7,8,9 7 0,2,3,3,4,5 8 1,1,2,3,5,6,6,7,7,9,9 9 0,1,3,4 a) Find the five number summary for the given

249. ## Math

Solve and please explain how you arrived at your ans: square of 3x-1=2

250. ## stats

suppose that the wait time at the bank is uniformly distributed in the interval 4-min-8min find the probability that a randomly selected customer has to wait longer than 6.5 minutes

251. ## algebra

Write an equation of the hyperbola with foci (0, ) and (0, 2) and vertices of (0, ) and (0, 1).

252. ## Probability and Statistics 2

The University of Southern Mississippi currently uses GE brad fluorescent light bulbs that have a mean life of 900 hours. Sylvania clams that its new fluorescent bulbs, that cost the same as the GE bulbs, last longer than the GE brand. A sample of 50

253. ## Homework

The formula for the volume of a cylinder is: V=πr^2*h If the volume is 432 cubic inches and the height is 8 inches, solve for the length of the radius. Round answer to 2 decimals.

254. ## Probability and Statistics 2

Minute Maid orange juice company claims that 25% or more of all orange juice drinkers prefer its product. To try to disprove the validity of this claim, Tropicana orange juice company sample 200 orange juice drinkers and found that 41 prefer the Minute

255. ## physics

Is it true that all radio waves are faster than all sound waves—no exceptions? A) False always.B) True, in most common cases.C) False in some cases.D) True in all cases.

which will become a buffer in 1L of H2O? a) 0.3 mole KOH & 0.3 mole HBr b) 0.5 mole NH3 & 0.5 mole HCl c) 0.2 mole NaCl & 0.3 mole HCl d) 0.2 mole NaOH & 0.2 mole HBr e) 0.4 mole HC2H3O2 & 0.2 mole NaOH I think that the answer is e. Is that correct?

257. ## Cultural Anthropology

what is Factory industrialism?

258. ## Math

Solve for x: x^2 -2x-4=0

259. ## trig

a 6 foot tall man is standing near a tree on level ground .if the man shadow 4 feet long .how many feet tall is the tree?

260. ## Economics/History

What trend did Johan Palmstruch start in Europe? How successful was this trend?

261. ## geometry

if you know the area of a parrallelogram is 45.0 square feet and the base is 10.o feet, how can you find the height? Explain your method and then solve the question.

262. ## math

the probability of havingtype O blood is 1/2 and the probablity if having type A blood is 1/4. what is the probablity of a person having either typr O blood or type A blood ?

263. ## statistics

A sociologist is studying marriage customs in a rural community in Denmark to determine the age of the woman at the time of her first marriage. the sample standard deviation of these ages was 2.3 years. The sociologist wants to estimate the population mean

264. ## life orientation

Ways in which the human or environmenta l problem impact on the community

265. ## Chemistry

0.200 moles of NaF are added to 1L 2.0 molar HF. What is the pH? a) 2.14 b) 6.70 c) 10.80 d) 3.00 e) 7.00

266. ## math

A geometric series with the first term 7 converges to 70. What does the common ratio equal? What does the second partial sum equal?

267. ## Stats

Consider the following Hypotheses test: Ho:m>=80 Ha:m

50.0mL of 0.1 molar NaOH is added with 50.0mL of 0.1 molar CH3COOH. The Ka = 1.8*10^-5. what is the pH of the solution? a) 7.00 b) 9.22 c) 4.77 d) 8.22 e) 5.78 I think that the answer is d. Would i be safe in saying that?

269. ## English

What effect do drugs, dangerous weapons and bullying have on schooling and education?

270. ## Chemistry

0.200 moles of NaF are added to 1L 2.0 molar HF. The Ka = 7.2*10^-4. What is the pH? a) 2.14 b) 6.70 c) 10.80 d) 3.00 e) 7.00 I got 4.14. pH = -log(Ka)-log([NaF]/[HF]) ==> pH = -log(7.2*10^-4)-log(.2/2) ==> pH = 4.14 Or did I do something wrong?

271. ## physics

A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it de- cays into an particle of mass 6.64×10−27 kg and 234Th nucleus of mass 3.88 × 10−25 kg, and the decay process itself is extremely fast (it takes about

272. ## geometry

i have to find the area of an irregular polygon how can i draw a picture to send you to show you? is this possible?

273. ## Algebra 2

Coffee Express sells three drinks -lattes mochas and cappuccinos. Each latte has 3 ounces of espresso and 13 ounces of milk. Each mocha has 3 ounces of espresso 11 ounces of milk and 2 ounces of chocolate syruo. Each cappuccino had 5 ounces of espresso and

274. ## life orientation

a clear explanation on human factors that may cause ill health,accident,crises or disaster on drug addiction

275. ## @elena

thank you so much help with the problem. i have trouble solving part b of the problem you helped me with. it told me to give it as a percentage, I got 10% but it is wrong. can you please help me Superman must stop a 190-km/h train in 180m to keep it from

276. ## statistics

an auditor wishes to test the assumption that the mean value of all accounts receivable in a given firm is $260.00. She will reject this claim on ly if it is clearly contradicted by the sample mean. the sample deviation of 36 accounts is$43, the sample

277. ## Intermediate Algebra

The magnitude of an earthquake on the Richter scale is given by the formula R=log I, where I is the number of times more intense the quake is than the smallest measurable activity. How many times more intense i an earthquake having a richter scale number

278. ## Maths and science

How drug addiction is a human factor that causes ill health, accidents crises or disasters

279. ## English

What effect do drugs,dangerous weapons and bullying have on schooling and education

280. ## Life Orientation

How drug addiction is a human factor that causes ill health, accidents crises or disasters

281. ## English Parallelism

I need help with parallelism i need to rewrite these sentences. 1. Because of prejudice in the corporation, not only did he leave but also sued for two million dollars; he did not win the case in court. 2. Since he wanted neither to get a ticket nor bother

282. ## CBSE

How much heat must be removed to change 75.0 grams of water at 25.0 C to ice at -35.0 C?

283. ## Chemistry

This volume of base and its corresponding pH is known as the______

284. ## chemistry

Explain why Na2CO3 (stop solution) inhibits -galactosidase activity.

285. ## english

what point about technology was Ayn Rand making by portraying such a primative future, and how do the events of the story establish that point?

286. ## Desktop publishing-Elements of Design

Well i took this test and failed. This is the last test and i graduate. I posted [my answers] to the ones i think are right. 1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type

287. ## English

Bullying is comprised of direct behaviors such as teasing,taunting,threatening and stealing

288. ## physics

The feature that our eyes are most sensitive to seeing is which of the following? A) edges or boundaries.B) images that fall on the blind spot.C) gray areas.D) anything at the periphery.E) all light of moderate intensity.

289. ## statistics

For a normal distribution with a mean of 140 and a standard deviation of 55 find each value requested. a. What is the minimum score needed to be in the bottom 10% of the distribution? b. What scores form the boundaries for the middle 75% of the

290. ## Chemistry

What is the [CrO4] in a 2.5 L saturated solution of lead (II) chromate to which 0.05 mol Pb(NO3)2 is added?

291. ## statistics

You are designing a study to determine whether music has an effect on learning. Previous research indicates that the standard deviation to learn a task is 3.4 minutes. How many subjects would you need to ensure with 90% confidence that the estimate is

292. ## math

lim x--->pi/4 tanx - cotx / x - pi/4

293. ## physics

Describe the operation of electrons in a conductor

294. ## Life Orientation

Ways in which Air pollution impact on the community

295. ## Computer science

A. Given a = 5, b = 1, x = 10, and y = 5, create a program that outputs the result of the formula f = (a b)(x y) using a single printf() function. B. Create a program that uses the same formula above to output the result; this time, however, prompt the

296. ## precalculus

a rectangular piece of cardboard measuring 14 inches by 27 inches is to be made into a box with an open top by cutting squares of equal size from each corner and golding up the sides . let x represent the length of a side of each square. for what value of

297. ## Algebra

x2 - 5x + 5 = 0

298. ## GED-Word Problems

Ms. Niemeyer is taking the train 3,240 miles to Oregon. She will travel 1/8 the distance the first day and 1/6 the distance the second day. How far will she have left to go after two days?

299. ## Biology

True or false? (if false, replace word in *here*) 1) The random changes of allele frequencies associated with genetic drift frequently lead to a *gain* in genetic diverse. 2) *sexual selection* helps maintain the Hb^a/Hb^s heterozygous conditions in

300. ## Chemistry

Please check a Nernst equation for me? Calculate the cell potential for the following reaction as written at 61 °C, given that [Zn2 ] = 0.800 M and [Fe2 ] = 0.0170 M. Half reactions: Zn-->Zn^2+ + 2e^- (potential= -0.76)(anode) Fe^2+ + 2e^- -->Fe