# Questions Asked onJanuary 23, 2011

1. ## Physics ( Calculus & Mecahnics )

A proton with mass m moves in one dimension.The potential-energy function is where and are positive constants. The proton is released from rest a x0 = a/b. (a) Show that can be written as U(x) = a --- [ ( x0/x )^2 - x0/x ] x0^2 Graph U(x). Calculate U(x0)

2. ## physics

1 kg of ice at 0° C is mixed with 9 kg of water at 50° C (The latent heat of ice is 3.34x105 J/kg and the specific heat capacity of water is 4160 J/kg). What is the resulting temperature?

3. ## financial analysis

an item which may be converted to cash within one year or one operating cycle of the firm is classified as a

VWXYZ is a rectangle-based pyramid where WX=66 cm and XY=32cm. The vertex is vertically above the center of the base. Given that the slant heights VA and VB are 56 cm and 63 cm respectively, find the total surface area of the pyramid. Additionally, find

5. ## math

the probability of a computer memory chip being defective is 0.02. which of ghe following statements is true? a) in a shipment of 1000 chips, it is certain that at least one will be defective. b) in a shipment of 100 chips, two will be defective c)the

6. ## English

What is the theme of "Abalone, Abalone, Abalone" by Toshio Mori?

7. ## physics

A charge Q = -520 C experiences a downward force of 0.04 N. What is the electric field in N/C at the point where the charge is located? Take upward to be positive. I know that E=Kq/r^2 therefore E= (9.0*10^9Nm)(-520*10^-6c)/r^2 I'm not sure how to get the

OPQRS is a regular square-pyramid whose base has sides of 7 cm. Given that the total surface area of the pyramid is 161 cm2, find its slant height.

9. ## calculus

A rectangular box is to have a square base and a volume of 50 ft3. The material for the base costs 44¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 26¢/ft2. Letting x denote the length of one side of the base, find a

a jar contains 4 white chips, 5 purple chips and 1 black chip. chips are selected randomly one at at time and are not replaced. What is the probability of choosing a purple then black chip?

11. ## Physics

A person of mass 55 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 670 kg·m2. The platform rotates without friction with angular velocity 1.0 rad/s. The person walks radially to the edge of the

12. ## chemistry

A 0.50 {\rm g} sample of vegetable oil is placed in a calorimeter. When the sample is burned, 18.9 {\rm kJ} are given off.

13. ## Physics

Figure below shows a closed Gaussian surface in the shape of a cube of edge length l. It lies in a region where the electric field is given by = (ax + a) + b + c. What is the net charge contained by the cube in terms of the given variables? Use ε0 if

14. ## calculus (rate of change)

consider the function f(x)=x^2-6x+12 a. find the average rate of change over the interval [-1,3] b. use the definition of the derivative to find f prime(x) c. find the instantaneous rate of change at the point where x=3 d. find the value of x on the

A peregrine falcon dives at a pigeon. The falcon starts downward from rest and falls with free-fall acceleration. If the pigeon is 82.8 m below the initial position of the falcon, how long does it take the falcon to reach the pigeon? Assume that the pigeon

16. ## Physics

A 19 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 23.2 degrees the crate begins to slide downward. what is the coefficient of static friction between the crate and the ramp? At what angle does

17. ## Organic Chemistry

What is the maximum mass of S8 that can be produced by combining 80g of each reactant? 8SO2 + 16H2S --> 3S8 + 16H2O i calculated the mass of the reactants 3S8 = 24x 32.066= 769.584 g/mol 16H2 = 32X 1.008= 32.256 g/mol O= 16X 15.994= 255.904 g/mol but from

18. ## Physics

A uniform electric field of magnitude 336 N/C is directed along the +y-axis. A 5.30 µC charge moves from the origin to the point (x, y) = (-10 cm, -37 cm). (a) What is the change in the potential energy associated with this charge?

19. ## algebra 2

a store is offering a discount of 30% on a suit. There is a sales tax of 6%. A) using a composition of function, represent this situatio in which the discount is taken before the sales tax is applied. B) using a composition of functions represent the

20. ## math

algebra: a car rents for $35 dollars per day plus 19 cents per mile. you are on a dailt budget of$73. what mileage will allow you to stay in your budget?

21. ## Math

Each letter in the subtraction problem below represents a different digit from 0 through 9.The digits 3 and 5 don't apear. replace each letter so the subtraction problem is true. GRAPE - PLUM =APPLE

22. ## Math

VWXYZ is a rectangle-based pyramid where WX = 66 cm and XY = 32 cm. The vertex is vertically above the center of the base. GIven that the slant heights of VA and VB are 56 cm and 63 cm respectively, find the total surfact area of the pyramid. Additionally,

23. ## Algebra

The function h is defined by h(x) . 6+x/4+2x Find h(2x)

24. ## Algebra

The largest Ferris Wheel in the world is the London Eye in England. The height (in metres) of a rider on the London Eye after t minutes can be described by the function h(t) = 67 sin[0.2094(t-30)] + 70 Using this equation i'm supposed to find the diameter,

26. ## math

write the following in a sigma notation 3/32+3/16+3/8+...+12288 so far ive gotten that a=3/32 and r=2/1 can you please help me further

27. ## biology

Most homeostatic mechanisms are controlled with a negative feedback loop. Explain why this mechanism may be more efficient at maintaining homeostasis as compared to positive feedback mechanisms. Provide examples of both

28. ## Calc

The slope of a curve at each point (x,y) is given by 4x - 1. Which of the following is an equation for this curve if it passes through the point (-2,3)? A) y=4x²-x-15 B) y=x²-4x-9 C) y=2x²-x-7 D) y=2x²-x E) y=2x²-x+7

29. ## Physics

An airplane must reach a speed of 185 mi/h to take off. If the runway is 467 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully? m/s2 I have been trying the formula vf^2=Vi^2+2AD and solving for A SO

30. ## cal

let s(t)= -16t^2 + 50 represent the distance in ft. from the ground of an object t seconds after initial velocity of the object? initial means t=0 1. what is the initial velocity of the object? 2. what is the velocity of the object 1 sec after it was

31. ## math

One canned juice drink is 25% orange juice; another is 10% orange juice. How many liters of each should be mixed together in order to get 15L that is 125 orange juice?

32. ## physics

A yo-yo has a rotational inertia of 810 g·cm2 and a mass of 95 g. Its axle radius is 2.6 mm and its string is 100 cm long. The yo-yo is thrown so that its its initial speed down the string is 1.0 m/s. (a) How long does the yo-yo take to reach the end of

33. ## physics

A car skids to a halt to avoid hitting ann object in the road draw a basic motion diagram . using the images from the movie from the time the skid begins until the car is stopped

34. ## Science

compare the number of valence electrons an oxygen, O, atom has with the number of valence electrons a selenium, Se, atom has. are oxygen and selenium in the same period or group?

35. ## statistics

A manufacturer of computer disks has a historical defective rate of .001. What is the probability that in a batch oof 1000 disks, 2 would be defective?

36. ## Science

Define reacting variable.

37. ## phy. chem

start from the Maxwell-Boltzmann distribution and derive an expression for the most probable speed of a gas of molecules at a temperature T. Go on t demonstrate the validity of the equipartition conclusion that the average translational kinetic energy of

38. ## statistics

A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95% Sample A: 40.3

39. ## chemistry

A solution of acetic acid is prepared in water by adding 11.1 g of sodium acetate to a volumetric flask and bringing the volume to 1.0 L with water. The final pH is measured to be 5.25. What are the concentrations of acetate and acetic acid in solution?

40. ## health

Under HIPAA, which one of the following statements is true regarding the release of PHI by covered entities to business associates? A. Covered entities are responsible for the use of PHI made by business associates. B. Covered entities aren’t allowed to

41. ## health

What is a doctor’s responsibility if a patient requests restrictions on the use of his or her PHI? A. The doctor must comply with the patient’s wishes. B. The doctor need not comply with the patient’s wishes if HIPAA would otherwise permit

42. ## Finite Math

At a price of $1.94 per bushel, the supply corn in 9,800 million bushel and the demand is 9, 300 million bushel. At a price of$1.82 per bushel, the supply is 9,400 million bushels and the demand is 9, 500 million bushels. A, find a price-supply equation

43. ## biology

I am posting this question in Biology instead of Algebra even though it is a question from my Algebra class. Thanks. A male bee has only one parent(a mother) and a female bee has two parents (a mother and a father).Assuming all ancestors are distinct, how

44. ## College Physics II

Identical isolated conducting spheres 1 and 2 have equal charges and are separated by a distance that is large compared with their diameters. The electrostatic force acting on sphere 2 due to sphere 1 is F. Suppose now that a third identical sphere 3,

45. ## calculus

find an expression for the function whose graph consists of the line segment from the point (2,2) to the point (-1,0) together with the top half of the circle with center the origin and radius 1

46. ## How to calculate marks to pass with the exam

My friend has currently 62.4% and the final exam is worth 30%. She's wondering how much she should get on the exam to at least pass or boost it up. Please show the math :o

47. ## College Algebra

Al gives 1/2 of his marbles to bev. bev gives 1/3 of these to carl. carl gives 1/4 of these to dani. If dani was given four marbles, how many did al have originally?

48. ## chemistry

what is thbe total number of molecules of so2 in a 0.10 mole same of so2

49. ## english

Is my sentence punctuated correctly? Even though it is almost summer, we still have overcast skies and light rain.

50. ## Algebra

Determine whether the ordered pair is a solution of the inequality. (6,20); 6y-7x>7

51. ## physics

At a given rotational speed, how does linear speed change as the distance from the axis changes?

52. ## accounting

The adjusted trial balance columns of the worksheet for Porter Company are as follows

53. ## Precalculus

1. Simplify the expression ((5x^-2)/(4x^2))^-2 2. (x)/(x^2-81)-(9)/(81-x^2) = 3. Let (-3,3) and (-6,_2) be points in the Cartesian plane. Find the distance between the points.

54. ## Chemistry

A sample of zinc with a mass of 14g was heated to 98 degree celsius in boiling water and then dropped into a beaker containing 4.5x10^4ng of water at 25 degree celsius. when the water and metal came to thermal equilibrium, the temperature is 29 degree

55. ## chemistry

a 2 l gas bulb contains 4.07*10^23 N2 molecules. If the pressure is 3.05bar, what is the rms speed of the N2 molecules? What is the temperature?

57. ## Medical Information Management

A company that provides comprehensive health care services on a prepayment basis to voluntarily enrolled participants is called a? A. Medicaid participant. B. health maintenance organization (HMO) C. preferred network association. D. Medicare provider. my

58. ## Math (Algebra)

What is the minimum point of the graph of the equation y=2x^(2) + 8x +9?

59. ## Chemistry

Is NaHCO3 a polar aprotic solvent?

60. ## physics

A ball is thrown upward from the ground with an initial speed of 26.7 m/s; at the same instant, a ball is dropped from a building 13.1 m high. After how long will the balls be at the same height?

75. ## Chemistry

Substance A has a density of 4.0 g/mL and substance B has a density of 2.0 g/mL. If we have equal-mass samples of each, which has the greatest volume?

76. ## Genetics- Biology

You have two parents (1)fast-growing vines with weak stalks, and (2) slow-growing vines with strong stalks. You cross the two pure-breeding vines but obtain only slow-growing plants with weak stalks. You then self-cross the F1 vines a number of times, but

77. ## Chemistry

Substance A has a density of 4.0 g/mL and substance B has a density of 2.0 g/mL. If we have equal-mass samples of each, which has the greatest volume?

78. ## chemistry

a ferric phosphate solution is prepared by adding 2.4 g of ferric phosphate to a volumetric flask and bringing the final volume to 1.00L by adding water having a phosphate concentration of 1.0 mg/L. what is the concentration of soluble iron in this

79. ## Physics

A baseball is hit off a 1 meter high tee at an angle of 25 degrees and at a speed of 43 m/s. How far to the nearest tenth of a meter does it travel horizontally?

80. ## geometry

find all points of form (x,-1) 4 units from point (3,2)

81. ## physics

Two blocks of masses m and M [M = 4.23m] are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord holding them together is burned, after which the

82. ## Physics

A golf ball is chipped at an angle of 49 degrees and with a speed of 8.5 m/s. How far does it travel to the nearest tenth of a meter?

83. ## physical

A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s

how can i make writing spelling sentences more interesting and fun?

85. ## Physics

Driving in your car with a constant speed of 12 m s you encounter a bump in the road that has a circular cross-section. The radius of curvature of the bump is 35.2 m. At what speed must you go over the bump if people in your car are to feel "weightless"?

86. ## algebra

Chu and Juan are each saving to buy the same two cd's. Chu is lacking $22 and Juan is lacking$3. When they combine their money they still do not have enough to buy the two cd's. What is the greatest number of whole dollars the two cd's could cost?

87. ## math

solve -14is less then and equal to 3x -7less than and equal to -2

88. ## algebra

Find an integer M such that M x 2 to the third power x 3 to the 7th power = 6 to the 7th power.

89. ## British Literature

I need to identify the figure of speech in this saying:"thy mind is an opal." I think it is a metaphor. Am I correct?

90. ## Math

The distance between the points (14,-18) and (15,-8) is? The point (a,b) is such that (14,-18) is the midpoint of the segment from (15,-8) to (a,b). Then a and =?

91. ## math

Draw a triangle ABC with BC=8cm,angleB=50degrees and angleA=50degrees.A lso bisect it.

92. ## chemistry

calculate the rms speeds of He at 10, 100, and 1000 K in meters per second and in miles per hour. What values would be otained if the pressure was 10^-10 bar

93. ## english

complete using a simile 1.a drunken person often walks like 2.as slow as 3.my friend can run like

94. ## Geometry check my answer?

The diameter of a car tire is approximately 0.6meters. The warranty is good for 70,000 km. About how many revolutions will the tire make before the warranty is up? More than a million? a billion? ----------------------- my work c=pi*d c=3.14*0.6 c=1.884

A quarterback takes the ball from the line of scrimmage, runs backward for 11.1 yds, then runs sideways parallel to the line of scrimmage for 17.8 yds. At this point, he throws a 52.7 yd forward pass straight downfield, perpendicular to the line of

a ferric phosphate solution is prepared by adding 2.4 g of ferric phosphate to a volumetric flask and bringing the final volume to 1.00L by adding water having a phosphate concentration of 1.0 mg/L. what is the concentration of soluble iron in this

97. ## physics

why would you need to divide mass by gravity?

98. ## statistic

A company is considering installing new machines to assemble its products. The company is considering two types of machines, but it will buy only one type. The company selected eight assembly workers and asked them to use these two types of machines to

99. ## physics

Multispectral refers to: A. UV, IR, and visible light B. the many colors in visible light C. UV, IR, and x-rays Thanks!

I am having trouble figuring out how to solve this logarithms. Could someone please help! log2(log4x)=1 and solve for x and y: (1/2)^x+y= 16 logx-y8=-3

160. ## Trigonometry

Express the following in radians: f.1025degrees. --> (pi/180)*1025 = -185pi/36 Is that correct or theirs another way to do it ??

161. ## geometry

The area of a rectangle is given by A = x2 + 4x – 5. Find the value of x if the total area of the rectangle is equal to 7 square units.

162. ## algebra

Given the function G(v)=5v+7, find each of the following, G(2)=, G(-7)=, G(6.5)=

163. ## physics

Can you help me with this one also? I know how to do it with 3 vectors but I can't seem to draw it with 4 vectors. The magnitudes of the four displacement vectors shown in the drawing are A=16.0 m, B=11.0 m, C=12.0 m, and D=26.0 m. Determine the (1)

164. ## social studies

identify five ways to develop human resources

165. ## Math

Mrs.Miller travels 60 mi round-trip to work.She workds 5 days a week. Her car gets about 25 mi/gal of gasoline.. About how many gallons of gasoline does MrsMillers car use during her weekly commute?

166. ## Algebra

If it takes Mary 45 minutes to basic cleaning of her house, and it takes her daughter 65 minutes to do the same basic cleaning, then how many minutes will it take for them to clean together? Can I please get help with ho to set the equation up?

167. ## HISTORY

I believe that the boundaries I created for nations of the Middle East would be a force for cooperation rather than conflict because...

168. ## Maths

If a marble of radius 2.1 cm is put into a cylindrical cup of radius 6cm and height 8cm, then how much water flows out of it.?

169. ## Physics

A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

170. ## Chemistry

In a 100g sample of water, determine the amount of weight that is attributed to Hydrogen and to Oxygen. i found the mass ratio which is 2:16 & then reduced its 1:8. then i set up my equation. 1x+8x=100g 9x=100g x=11.11111111 or 100/9 then i have to

171. ## Algebra

The function h is defined by h(x) . 6+x/4+2x Find h(2x)

172. ## MATH

Dan, Fran, and Stan have 194 cards. Dan has 24 less than Fran, and Stan has 35 more than Fran. How many do each of them have?

173. ## Chem- Dr. Bob!

Posted by Rachel on Thursday, January 20, 2011 at 3:57pm. Does anyone know where I can get an image of the valence bond model for maleic acid? ie. showing the pi and sigma bonds and indicating the hybridization (sp2, sp3.. ) OR could someone describe these

174. ## Chemistry

If 12.90 mL of a 18.2 Weight% solution of sodium chloride is diluted to a final volume of 3.00 liters, what is the Molar concentration of the diluted solution? The density of the original solution is 1.12 g/mL.

175. ## math 12

In a population of 328 snakes at a zoo, it is known that 162 are female. A scientist selected 50 snakes at random to run some tests. What is the probability that the scientist will select at least 30 female snakes?

176. ## College Chemistry

1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5°C cgas

178. ## math 12

In his best year, Mickey Mantles batting average was o.365. In that year, what was the probability that he would get exactly 5 hits in 15 times at bat? Compare the results from the normal approximation with the results from a calculation using a binomial

179. ## College Macroeconomics

Can someone who knows Macroeconomics check this? Write Positive or Normative for each statement below. Taxes are too high. (Normative) If taxes were lower, government revenues would actually increase. (Normative) It is immoral for a government to

180. ## Calculus

The region between the graphs of x=y^2 and x=4y is rotated around the line y=4. The volume of the resulting solid is how so i solve?

181. ## Pre-Calculus

A window has the shape of a square surmounted by an isosceles triangle. The sides of the square are length x. The The perimeter of the window is 90 inches. Thus, the perimeter of the triangle is x+2y. So, 90 inches = 3x+2y. (a) Write an equation for the

182. ## Calculus

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=4y^2, y=1, x=0 about the y-axis

183. ## math

3 10 ____ = ____ x-5 x+2

184. ## chemistry

What volume of a 3.00 M KI stock solution would you use to make 0.270 L of a 1.25 M KI solution?

185. ## elementary chemistry

Calculate the concentration in micrograms per liter: 0.001000 N Ca^2+

186. ## Calculus

Find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0, y=5+x^6 about the x-axis.

187. ## com/155

I think I found all the errors. What do you think?

188. ## algebra

A piece of cable 8.5 cm long weighs 52 grams. What will a 10-cm length of the same cable weigh?

189. ## RE

how do i draw a film poster of joseph to moses....

190. ## algebra

Mason starts walking from home at 3.7 mph. Ema leaves to follow Mason 48 minutes later walking at 4.1 mph. How long will it take Ema to catch up to Mason?

191. ## Math Grade 12 college

250(1.03)^n=400 solve for n

192. ## Physics

A ball is thrown directly downward, with an initial speed of 6.10 m/s, from a height of 31.0 m. After what interval does the ball strike the ground?

193. ## Language Arts

I have to find a metaphor in the book- A Christmas Carol by Charles Dickens. The only metaphors I have found are 'darkness is cheap' and 'woe is me.' Which one makes the most sense (to be a metaphor)?

194. ## trigonometry

using the law of sines, solve the rest of the triangle: side C=14 side B=4 angle c=145 degrees i got angle b= 9.4 angle a=25.6 side A=10.4 but i didn't know if it was correct

195. ## math fractions

how do you get from 3/32 to 3/16 ?

196. ## Physics

Two bullets have masses of 4.6 g and 11 g, respectively. Each is fired with a speed of 41.0 m/s. a) What is the kinetic energy of the first bullet? Answer in units of J.

3/x-5=10/x+2

198. ## math

There are 1o patients in the hospital. Nine of them need the same medication. If the medicine bottle is 3/4 full, how much will each patient get from the bottle if divided equally?

199. ## science

I need a website on elements and dont

200. ## college algebra

how do i solve 8-5/x=2+3/x

201. ## calculus

A rectangular box is to have a square base and a volume of 50 ft3. The material for the base costs 44¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 26¢/ft2. Letting x denote the length of one side of the base, find a

269. ## physics

At a distance of 30 m the noise from the engine of an jet has an intensity level of 130 dB. At this level, you will be in pain and your ears will hurt. That's why this intensity is know as the "pain threshold". How far do you have to be from a jet (total

271. ## PHYSICS

A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s

272. ## math

radius of 4 centimeters and length of 12 centimeters, how many cubic centimeters?

273. ## Pre Calc

√(x+2) -7 =√(x+9)

274. ## statistics

To display the major of a sample of college students, which graph would be the best choice?

275. ## chemistry

what is the density of a piece of metal that has a mass of 18g and volume of 2mL

276. ## Medical Information Management

Medicaid eligibility is determined by? A. National Committee for Quality Assurance B. state of residence C. health care facility D. Centers for Medicare and Medicaid my answer is B, state of residence. i cant find this anywhere in my book. however when i

277. ## American government

Whenever Congress has a perceived need for ongoing control of an econmic activity, it has tended to create a ?

278. ## physics

When you push a 1.55 kg block resting on a tabletop it takes 1.85 N to start the book sliding. Once it is sliding, however, it takes only 1.5 N to keep the book moving with constant speed. what are the coefficients of static and kinetic friction between

279. ## chemistry

what is the volume of a piece of wood that haas a mass of 6 g and a density of 0.5 g/mL?

280. ## physics

;if a hoop A is made of iron & hoop B of wood are pushed at same time down to an inclined plane. find velocity of both if height of plane is 1m?

281. ## Math

5x + 4(x + 3) = 66

. (square rt. 5) +(square rt. 25) = 2. If y=x^2 +2x +k passes through the point (1,2), then k = 3. If F(x) = 1 +3x^2, where X cannot be 0, then F(x+2)-F(2)/(x) =

283. ## Chemistry

What is the pH of a one liter auqueous solution to which has been added 0.2 moles of acetic acid (CH3COOH)?

. (square rt. 5) +(square rt. 25) = 2. If y=x^2 +2x +k passes through the point (1,2), then k = 3. If F(x) = 1 +3x^2, where X cannot be 0, then F(x+2)-F(2)/(x) =

285. ## statistics

A company is considering installing new machines to assemble its products. The company is considering two types of machines, but it will buy only one type. The company selected eight assembly workers and asked them to use these two types of machines to

286. ## statistics

A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95% Sample A: 40.3

287. ## Trigonometry

Express the following in radians: a.135degrees. --> (pi/180)*135 = how can i end up with a fraction answer?? b.-15degrees. --> (pi/180)* -15 = same here what are the steps to do next to get a fraction answer.

288. ## Geology

How does the geothermal gradient vary with depth within the Earth?

289. ## Math

I am having trouble figuring out how to solve these logarithms. Could someone please help! log2(log4x)=1 and solve for x and y: (1/2)^x+y= 16 logx-y8=-3

290. ## Calc

The wind chill is the temperature, in degrees Fahrenheit, a human feels based on the air temperature, in degrees Fahrenheit, and the wind velocity (v), in miles per hour (mph). If the air temperature is 32degrees Fahrenheit, then the wind chill is given by

291. ## math

The area of a rectangle is 25 sq in and the perimeter is 25 in. Find the length of the smaller side; enter answer as decimal rounded to 1 decimal place, no units (e.g., 6.0)

292. ## college math 209

simplify the following expression -(x) + 4 (4 v + 2x)

293. ## English

Can you check these sentences for me, please? Thank you. 1) The king ruled over England from 1189 to 1199. During his absence/in his absence his younger brother became king. He was unpopular because he demanded high taxes. 2) The king was orced to sign a

294. ## social studies

Why would the new states want a weak government?

295. ## statistics

What is the difference between the height of the tallest man at 92.95" and the mean height of me at 69.6" and a stanard deviation of 2.8? How many standard deviations is that? Convert tallest man to a z score Does tall mans height meet the criterion of

296. ## Maths

Dora and Paul have a collecttion of x marbles.Dora has x/3.What is the fraction of the marbles does Paul have?

how can you condense these cos^3x* cos2x^2 cos^3x+ cos2x^2 cos^3x- cos2x^2 Thank you soo much

298. ## Math!

x/4 - 3x/2 = -1/2 I do not understand at all

299. ## Math

from a group of 14 junior and 9 senior students, determine how many committees of 8 students can be chosen if all chosen students are junior students?

300. ## Physics

A square plate of copper with 53.0 cm sides has no net charge and is placed in a region of uniform electric field of 77.0 kN/C directed perpendicularly to the plate. Find the charge density of each face of the plate.

301. ## Math

I am having trouble figuring out how to solve these logarithms. Could someone please help! log2(log4x)=1 and solve for x and y: (1/2)^x+y= 16 logx-y8=-3

302. ## math

Stuck here Question wants the correct number of significant figures. tan^-1 (9/7)=?

303. ## chem

A small sterling silver braclet has a mass of 76.0g and a volume of 7.33ml(by water displacement) Calculate the mass and % Ag and the mass and % Cu in the braclet. Assume the volumes to be linerly additive. density of Ag= 10.5 g/ml;density of Cu=8.96 g/ml.

304. ## Math trignometry

how can you condense these cos^3x* cos2x^2 cos^3x+ cos2x^2 cos^3x- cos2x^2 Thanks a lot :)

305. ## Finite

For this problem, assume the balls in the box are numbered 1 through 8, and that an experiment consists of randomly selecting 3 balls one after another without replacement. What probability should be assigned to the event that at least one ball has an odd

306. ## algebra

-(x-v)+4 (4v + 2x)

307. ## algebra

A dehydrated patient needs a 7.9% saline IV. Unfortunately, the hospital only has bags of 3% and 10% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?

11b,6=b-5

309. ## Geometry

A satellite in a nearly circular orbit is 2000 km above Earth's surface. The radius of Earth is approximately 6400 km. If the satellite completes its orbit in 112 hours, calculate the speed of the satellite in kilometers per hour. Please help me. I have a

310. ## Math

2/7 k - 1/14 k = -3 does k= -42?

311. ## algebra

A dehydrated patient needs a 7.9% saline IV. Unfortunately, the hospital only has bags of 3% and 10% saline solutions. How many liters of each of these solutions should be mixed together to yield 3 liters of the desired concentration?

312. ## intermediate algebra

trying to find the equation of each line in slope-intercept form. slope -5; y-intercept 1/2

313. ## Math

A triangle whose sides are 5, 12, and 13 inches is similar to a triangle whose longest side is 39 inches. What is the perimeter of the larger triangle?

314. ## volume

Jasmine is a manufacturing engineer who is trying to find out if she can use a 20-inch-by-12 inch sheet of cardboard and a 15-inch-by-16-inch sheet of cardboard to make boxes with the same height and volume. Is such a pair of boxes possible? Please give

315. ## Chem- Dr Bob

NO(g) + CO2(g)NO2(g) + CO(g) delta H^degree sign = -100kJ Which of the following will favor the forward reaction? Why? A) add NO B) remove NO2 C) decrease the volume of the container D) raise the temperature E) add CO Not sure why the last posting didn't

316. ## ENG 121 English Composition I

can some one tell me where my mistakes are in this essay please need my tomorrow night. (here is my paper) THE BEGANING TO MY BEGANING I decided to return to school about two years ago my reasoning for returning back to school was I seen how many of my

317. ## trig

To calculate the height of a cliff, a surveyor takes the following measurements. The cliff's shadow is 12m, while at the same time a meter stick has a shadow of 2m. Draw a diagram and find the height of the cliff.

318. ## ALGEBRA

solve for u 3u - 16=5 (u - 6)

319. ## trig

A kite is flying overhead at an angle of elevation is 28. If the kite string is 10m long, what is the horizontal that the kite is flying away from you?

320. ## geometry

could a kite be equilateral? could a square or rhombus be a kite ? is it possible to be a kite?

321. ## AP Chemistry

What is the molality of the solution when you have 48.2 % by mass KBr aqueous solution ? Show each conversion step.

322. ## Math

Harry went to collect eggs from four chicken coops. At the first coop he collected the eggs and put them in the basket.at the next coop,he doubled what he had.At the third coop, he collected 6 more but dropped and broke two on his way to the fourth coop.

323. ## com155

I need helping pointing out all the verbs and tenses. My education plays (present tense) a very important role in my life. It will be (future tense) a major role in my successful financial planning. I have completed (present perfect tense) a personal

324. ## history

I have to make do a 3d affect in a shoe box of a famous black peson. I came up with marion anderson singing at the white house. How or what can I do to make the 3d affect

325. ## Physics

A car accelerates from rest to 30m/s in 10s. What is the car's acceleration?

326. ## Chemistry

Which of the following is the BEST explanation for why a catalyst speeds up a reaction? A) The catalyst increases the concentration of the products B) The catalyst decreases the total pressure in the container. C) The catalyst raises the temperature of the

327. ## Math

c - 1/4c = 49.95

328. ## organic chemistry

What volume of physiological saline solution (90% by weight NaCl, in water) would give you a gram of salt when evaporated?

329. ## media world

How have modern social media sites affected commerce? Include positive and negative examples in your answer.

330. ## Finite Math

65, A drugstore sells a drug costing $85 for$112 and drug costing $175 for$238. A, If the markup policy of the drugstore is assumed to be linear, write an equation that expresses retail price R in terms of cost C (wholesale price). B, what does a store

331. ## college math 209

find the values for x and y 4x - 9= -15 -3x - 4y = 22

332. ## interior decoration

what is known by elements of design

333. ## math

a bag contains 12 black checkers and 12 red checkers. What is the probability of choosing two red checkers?

334. ## Finite Math

66, A clothing store sells a shirt clothing $20 for$33 and a jacket costing $60 for$93. A, If the makeup policy of the store is assumed to be linear, write an equation that expresses retail price R in terms of cost C (wholesale price). B, What does a

335. ## Chemistry

An unknown salt AS x XH2O was analyzed and found to contain 16.4 percent water. If the anhydrous salt has a formula mass of 183 amu, find the water of crystallization (X) for the hydrate. I have no idea how to figure this out! HELPP PLEASE!!

3p^2+4P^2=63

337. ## algebra

after diving 93m below sea level, a diver rises at a rate of 6 meters per minute for 8 minutes. where is the diver in relation to the surface? i can't figure this one out 6x8=72 72 + 93= 165 but this still doesn't look right at all!!!!!!!!

338. ## Math

which of the following sums is larger and by how much? 1. 7 over Sigma 15/4(pi/10)^n 2. 11 over Sigma 17/4(4/13)^n please help me with the steps on how to figure this out! thanks

339. ## english

1. would it be difficult to procure in the desert? 2. how might someone react if you prvoke that person? 3. what might be the subject of a profound discussion? 4. if a critic is profuse in her praise of a movie, how well did she like the movie?

3p^2+4P^2=63

3p^2+4P^2=63

342. ## Pre-Cal: Trig

The point (7,2) determines a poistion angle "t". Find the exact value of sin(t).

343. ## college math 209

simplify as much as possible y^2ã48yv^2 - vã12 y^5

344. ## Pre-Cal: Trig

The point (7,2) determines a position angle "t". Find the exact value of sin(t).

A solution of acetic acid is prepared in water by adding 11.1 g of sodium acetate to a volumetric flask and bringing the volume to 1.0 L with water. The final pH is measured to be 5.25. What are the concentrations of acetate and acetic acid in solution?

346. ## ENG 121 English Composition I

I need some one to look over this and tell me where my mistakes are please THE BEGANING TO MY BEGANING I decided to return to school about two years ago my reasoning for returning back to school was I seen how many of my friends and family members were

347. ## english

what is the strongest argument for the use of discretion in doing out punishment. Malcolm Gladwell, No Mercy

348. ## Geometry check my answer?

Wilbur Wrong is flying his remote control plane in a circle with a radius of 28 meters. His brother clocks the plane at 16 seconds per revolution. What is the speed of the plane? Express your answer in meters per second. The brothers may be wrong, but you

349. ## english

7. Which of these sentences is correct or illustrates the best style? (Points : 1) The report was thorough. Furthermore, it saved the department several hundred dollars. The report was thorough. It saved the department several hundred dollars. The report

350. ## finance

Pick a company that pays dividends, then calculate the expected growth rate of your company using the CAPM. Once this task is complete, calculate the expected growth rate using the Constant Growth (or Gordon Growth) Model.

What is the molality of the solution when you have 48.2 % by mass KBr aqueous solution ? Show each conversion step

352. ## Algebra

(a-x)/(b-x)=c/(x-b) How do i go about solving this?

353. ## Calc

A rectangular box, with a square base and open at the top is to be constructed. If the volume of the box needs to be 108 cubic feet, what is the minimum surface area?

354. ## Pre algebra

-3(4x+3)+4(6X+1)=43 Need to solve

355. ## MATH

Factorize the following : x4-x2-6 HELP!!!!!!

356. ## Calc

Given function f defined by f(x) = ( 1- x)³. What are all values of c, in the closed interval [0,3], that satisfy the conditions of the Mean Value Theorem?

357. ## english (cont.)

1. if you receive lamentable news, how do you feel? 2. what might cause a person with a normally rosy complexion to suddenly look sallow? 3. if you need film for you camera, where might you try to procure it?

358. ## MATH

Find the value of n n4=16 n=? 6n=216 n=? 5n=625 n=? 11n=1331 n= can someone help me do this?

359. ## Pre-Calc

√(X+10) + √(X-6) = 8 Help would be greatly appreciated! Thanks!

360. ## SCIENCE

What are floridas Resources? they don't only have 2 be natural? GRACIAS

361. ## Math

A rectangular room has a perimeter of 94 and area of 546. What are the dimensions of the room?

362. ## college math 209

simplify as much as possible y^2sqrt 48yv^2 - vsqrt 12 y^5

363. ## english

• Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show

364. ## Chemistry

If the equilibirium reaction is 2 03(g) 3 O2 9(g) is first order with respect to ozone, what type of plot( meaning what is plotted on the y axis vs what is plotted on the x-axis) will yield a straight line? what will the slope of the line represent? PLEASE

365. ## Math

how can you condense these cos^3x* cos2x^2 cos^3x- cos2x^2 Thanks a lot :)

366. ## social studies

i need a list og lanformations in weirton wv or near weirton wv

367. ## math (surface area)

i know the formula of a rectangles surface area is SA= 2(lw)+(wh)+(lh), but when the dimensions are : 2a for the height, a for the width, and 3a for the length, how do i solve?

368. ## physics

Two blocks of masses M and 3M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them as shown in the figure below. A cord initially holding the blocks

369. ## Math

Show the two lines (x/2-1/2)=(y/3-2/3)=(z/4-3/4) and (x/5-4/5)=z intersect.find the point of intersection of these lines

370. ## Physics

A very large, thin, flat plate of aluminum of area A has a total charge Q uniformly distributed over its surfaces. Assuming the same charge is spread uniformly over the upper surface of an otherwise identical glass plate, compare the electric fields just

371. ## science

how many different elements are bonded to carbon in the molecule of luminol?

372. ## geometry

si quiero poner 5 litros de agua en una piramide cuadrangular cuanto debe de medir ?

373. ## math (area&perimeter)

the demensions of a rectangle are 5y for the height, and 7y-4 for the length. the question i need help with is asking me to simplify the equation for the perimeter and the area of this figure.

374. ## MATH

Factorize the following : x4-x2-6 HELP!!!!!!

375. ## AP Chemistry

calculate the molar volume (volume of 1.0 mole) of an ideal gas at 1.0 atm and 25 degrees celsius

376. ## algebra

solve for, where u is a real number sqrt 9u - 10 = sqrt 5u + 16

377. ## British Literature

I need help in identifying the figure of speech in the following statement: "Your reason, dear venom, give thy reason." Any ideas?

378. ## Chemistry

In a 100g sample of water, determine the amount of weight that is attributed to Hydrogen and to Oxygen. i found the mass ratio which is 2:16 & then reduced its 1:8. then i set up my equation. 1x+8x=100g 9x=100g x=11.11111111 or 100/9 then i have to