# Questions Asked onMarch 4, 2013

1. ## math

an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

2. ## Chemistry

A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for his reaction

3. ## Algebra

Suppose a population of 160 crickets doubles in size every month. The function gives the population after x months. How many crickets will there be after 2 years? (1 point)2,684,354,560 crickets 640 crickets 7,680 crickets 655,360 crickets

4. ## math

Ivan has completed 45% of his walk. He has already walked 9 km. How much farther does he have left to walk? I don't understand how to do this. Could you please help and show me how you got this answer? Thank you.

5. ## Pre-Algebra

Write the given sentence as an equation. Tim's age in 7 years will be three times what it was 19 years ago.

6. ## Chemistry

in an experiment, ammonia gas, NH3(g) was bubbled through distilled water. Some of the dissolved ammonia gas, NH3, reacted with the water to form the aqueous ammonia ions, NH4. When red litmus paper was placed in contact with the aqueous solution, the

what mass of water must be added to 425 g of formaldehyde to prepare a 40.0% (by mass) solution of formaldehyde? this solution, called formalin, is used to preserve biological specimens. (hint:) substitute the known quantities into the definition for mass

8. ## Analytical Chemistry

How many milliliters of 0.0560 M EDTA are required to react with 50.0 mL of 0.0170 M Cu^2+? With 50 mL of 0.0170 M Sc^3+? My work so far: (50mL)(0.0170mmol/mL)= 0.85 mmol Cu^2+ I'm not sure how to do the rest. Please help.

9. ## Physics

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

10. ## Chemistry

An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers. Find the pH of the following buffers. (a) 0.090 M HClO and 0.090 M NaClO (b) 0.090 M HClO and 0.135 M NaClO (c) 0.135 M HClO and 0.090 M NaClO (d) One liter of

11. ## Chemistry

A buffer consists of 0.16 M KHCO3 and 0.39 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 10-7 and Ka2 = 4.7 10-11. (a) Which Ka value is more important to this buffer? Ka1 Ka2 I don't understand this one at all. How do I determine which Ka value

12. ## Physics

If you walk 2 km from your house to a store then back home, whats your displacement? (Displacement is the difference between 1st position and final position)

13. ## math

If a car holds 16 gallons of gas. If 3/4 of a tank was used how man gallons was used?

14. ## math

a race track is a mile around circle which equals 5,280 circumference. To find the diameter (the the width of the center of the circle) do I divide the 5,280 by 2?

15. ## math

The radius of a cylinder is 3x-2 cm. The height of the cylinder is x+3 cm. What is the surface area of the cylinder? The choices are: 2pi(3x^2 + 10x - 8) 2pi(12x^2 + 7x - 2) 2pi(12x^2 - 2x + 13) 2pi(12x^2 - 5x - 2) Please help me in setting this up and

16. ## math

A community center is expanding the size of its rectangular meeting hall. The hall is currently 300ft long and 150ft wide. The center plans to expand both the length and the width of the meeting hall by 3x ft. What polynomial in standard form represents

17. ## Chemistry

1. Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of

18. ## English

Read the following sentence: Moses was a hebrew prophet and led his people out of captivity. What is the simple subject of this sentence? A: Hebrew prophet B: people C: Captivity D: Moses Answer A ?

19. ## Stats

Lemington’s is trying to determine how many Jean Hudson dresses to order for the spring season. Demand for the dresses is assumed to follow a normal distribution with mean 400 and standard deviation 100. The contract between Jean Hudson and Lemington’s

30. ## physics

Suppose we have |ϕ⟩=∑y∈{0,1}nβy|y⟩ such that βy=0 if s⋅y=1mod2 and βy=12(n−1)/2 if s⋅y=0mod2, where s is some hidden n-bit string. (a) If we run Fourier sampling on |ϕ⟩, what is the probability that we see s?

31. ## Chemistry

Caslcualte the formula massfor each of the following compunds CS2 C6H12O6 Fe(nO3)3 C7H16

32. ## chemistry quick homework help

What is the molecular geometry surrounding the carbon atom in CI4? (This compound contains the elements caron and iodine, not chlorine.) trigonal planer pyramidal (trigonal pyramidal) bent (angular) linear tetrahedral

33. ## statistics

Bowl #1 contains 4 grape candies, 5 lemon candies, 6 cherry candies and 5 raspberry candies. Bowl #2 contains 8 grape candies, 5 lemon candies, 4 cherry candies and 3 raspberry candies. (c) What is the probability that the two selected candies are the same

34. ## poetry

What is the authors tone in the poem arithmetic?

35. ## Physics

A battery with an emf of 7.9 V and internal resistance of 1.37 Ω is connected across a load resistor R.If the current in the circuit is 0.88 A, what is the value of R? Answer in units of Ω What power is dissipated in the internal resistance of the

A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.

37. ## chemistry

Phenylacetic acid (C6H5CH2COOH) is one of the substances that accumulates in the blood of people with phenylketonuria, an inherited disorder that can cause mental retardation or even death. A 0.021 M solution of C6H5CH2COOH has a pH of 2.99. Calculate the

38. ## Algebra

represent the relationship between the number of triangles and the perimeter of the figures they form. fill in table below. triangle 1: 6-6-5(b) triangle 2:6-6-5(b)&(H) triangle 3: 6-6-5 (b)-5 (B) 5 (h) fill in number of triangles-1, 2, 3, and perimeter

39. ## Physics

A force of 20 N acts toward the west. Another force acts at the same point so that the resultant of the two forces is zero. What is the magnitude and direction of the second force?

40. ## College Algebra

A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

41. ## math

an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

42. ## Shayna

Find the value of a so that the function f(x) = xe^(ax) has critical point at x = 9 I found that the derivative is axe^(ax)+e^(ax) But I am not sure where to go from here?

43. ## corporate finance

1. Which of the following is NOT correct for a firm with seasonal sales and customers who all pay promptly at the end of 30 days? a. DSO will vary from month to month. b. The quarterly uncollected balances schedule will be the same in each quarter. c. The

44. ## Calculus

The owner of a used tire store wants to construct a fence to enclose a rectangular outdoor storage area adjacent to the store, using part of the side of the store (which is 220 feet long) for part of one of the sides. (See the figure below.) There are 430

45. ## Physics

A car is travelling along a highway with a speed of 25 m/s when the driver sees an obstruction 1.80*10^2 m directly ahead. It takes the driver 0.80s to react and begin braking. a) How far does the car travel before it begins to slow down? b) How long will

46. ## algebra

simplify x+2/3x-6 * x^2-3x+2/x^2-x-6 and -7/2 + 3-x/x

47. ## Calculus

Determine if the series converges or diverges. Sum (n=1, infinity) (2*4*6...2n)/n! My main problem is I have no idea what to do with the numerator.

48. ## Math

A carton of Girl Scout cookies weighs 15 Lb. Each carton contains 36 boxes of cookies. How many boxes of cookies would 43 cartons contain?

49. ## psychology

The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?

50. ## physics

An ocean wave travels 17.1 m in 6.7 s. The distance between the two nearest wave crests is 5.1 m. What is the frequency of the wave? Answer in units of H

51. ## Calculus

The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval

52. ## physics

An electron is projected, with an initial speed of vi=1.38e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal

53. ## pentagon...GEOMETRY

ABCDE is a regular pentagon. FAD is an equilateral triangle, such that points F and E are on the same side of line AD. What is the measure (in degrees) of ∠FAB?

54. ## English II

Expand each sentence below by adding words or phrases that modify the verb. Questions after each item suggest details you can add. 1.Prehistoric paintings were found. 1. How were the paintings found? 2. Where were the paintings found?

55. ## Chemistry

A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?

56. ## math

Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line. f(x)=7x-5x^2 at (-2,-34) m = ?? y = ?? .

57. ## maths

A Plank of Wood 6 m Long is cut in the ratio 1:5. find the length of the Longer Piece in centimetres.

58. ## algebra

if lamar has scored 99,71,58 and 73 on his previous four tests, what score does he need on his next test so that his average is 79?

59. ## Calculus

Determine convergence or divergence for the following series. State the tests used and justify your answers. Sum (infinity, n=1) 1/(1+e^-n) Sum (infinity, n=1) (2*4*6...2n)/n! Sum (infinity, n=0) (n-6)/n Sum (infinity, n=0) (n-6)/n! Sum (infinity, n=0)

60. ## Geometry

line xy bisect and is perpendicular to ab and cd. ab=6 and ap=5 what is the length of xy

61. ## math

Write the following as an inequality -8 is less than x and 2 is greater than x. Use x only once in inequality

62. ## Programming

I must write Analysis, IPOChart, Hierarchy Chart, Flowchart, GUI Design, Pseudocode, and Test Cases for an office supply inventory tracking program Here is the Pseudocode that i have so far: Main Module 1 Declare PensAmount As float 2 Declare PaperAmount

63. ## math

Find the derivative of the function f by using the rules of differentiation. f(x)=(9x^3+3x^2+10x-6)/(x)

64. ## Algebra

What type of graph does not show the number of times a response was given? A.box-and-whisker plot B.line plot C.stem-and-leaf plot D.bar graph I think it is a bar graph/D

65. ## chemistry

Hey, I was just struggling with a question that I need to figure out to help me with my next lab, so if any of you guys could help me that would be greatly appreciated. Question: write a balanced equation for the reaction between H2O2 and acidified MnO4-

66. ## math

Find the derivative of the function f by using the rules of differentiation. f(x)= 4x^4/3-2/3x^3/2+7x^2-3x+1

67. ## Algebra

Which of the following types of information is suited for display on a scatter plot? A.relationship between favorite color and age B.relationship between number of pets and favorite TV show C.relationship between hours of exercise and number of siblings

68. ## Algebra

You want to make a graph to show how you spend your time each day. What is an advantage of choosing a circle graph for this data? A.A circle graph shows how each category of time relates to the total amount of time. B.A circle graph is easier to make. C.It

69. ## Physics

A horizontal spring is lying on a frictionless surface. One end of the spring is attaches to a wall while the other end is connected to a movable object. The spring and object are compressed by 0.076 m, released from rest, and subsequently oscillate back

70. ## Chemistry

Suppose a can of aerosol contains a residual amount of gas at pressure of 755mm Hg and a temperature of 25C. What would the presure be if the can were to be heated to 1155c?

71. ## math

the points x,3 and -2,2 have a slope of 1/4. what is the x-coordinate of the point x,3?

72. ## World History

What is the significance of the Republican Party?

73. ## math

A four-digit number between 12 and 13 has an odd number in the hundredths place and an even number in the tenths digit. The sum of the tenths and hundredths digit is 9. What are the possible four-digit numbers?

74. ## Statistic

IQs among undergraduates at Mountain Tech are approximately normally distributed. The mean undergraduate IQ is 110. About 95% of undergraduates have IQs between 100 and 120. The standard deviation of these IQs is about A. 5 B. 10 C. 15 D. 20 E. 25

75. ## Algebra

A ball is thrown upward with an initial velocity of 14 meters per second from a cliff that is high. The height of the ball is given by the quadratic equation where h is in meters and t is the time in seconds since the ball was thrown. Find the time that

76. ## Algebra

Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called

77. ## COM/330

what are Real-world Systems Theory examples?

78. ## math

can someone tell me if this is right T=1/5(x-y+z) = x+z-y and can someone please help me with this one F(x)=x^2-6x-27 / x^2-1

79. ## physical science

Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why?

80. ## algebra

A ball is thrown upward with an initial velocity of 14 meters per second from a cliff that is high. The height of the ball is given by the quadratic equation H = 49t^2 + 14t +60 where h is in meters and t is the time in seconds since the ball was thrown.

81. ## English

1. I go to a museum to see pictures. 2. I go to a museum to watch pictures. 3. I go to a museum to look at pictures. (Which one is commonly used?)

82. ## science

A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and

83. ## Chemistry

Calculate the morality of a solution that contains a 4.0 mol of a solute dissolved in 12.0L of solution

84. ## English

1. Wilma found a love for running. 2. Wilma found love for running. (Which one is correct?) 3. Wilma tried hard to be able to walk again. (What is the part of speech of 'to be able to walk again'? Is it the object of 'tried'? Or is it an adverbial phrase

85. ## english

what would a thesis statement be for Old Jules by Mari Sandoz

86. ## Finite, Math, Probability

Assume that there are 18 board members: 12 females, and 6 males including Larry. There are 3 tasks to be assigned. Note that assigning the same people different tasks constitutes a different assignment. Find the probability that both males and females are

87. ## Social Studies

How did the immigrants who came to the United States between 1820 and 1860 change the character of the country?

88. ## chemistry

An aqueous solvent of NaCl has a melting point of –165C How many moles of NaCl are present in a 189 g solvent?

89. ## Chemistry

What is the significance of the distance between two metals in the activity series?

240. ## algebra!

The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.

241. ## history

2. It's believed that the role of feasts in the Ice Age was to A. strengthen group ties. [B.] mark times when food was abundant. C. celebrate weddings. D. celebrate the resolution of serious conflicts. i think this is the answer but i couldn't find it in

242. ## geometry(rectangle)

Given a 100 by 100 square grid, what is the most number of 1 by 51 rectangles that we can cut out of it?

243. ## Math

What is 75/31in simplest form

244. ## Calculus

At what value of x does the graph of y=9x^(1/3)+x^2 have a point of inflection?

245. ## geometry!

Given a 100 by 100 square grid, what is the most number of 1 by 51 rectangles that we can cut out of it?

246. ## trig

use an angel sum identity to verify cos2theta = -2cos^@-1

247. ## College Algebra

A calculator company produces a scientific calculator and a graphing calculator. Long-term projections indicate an expected demand of at least 100 scientific and 80 graphing calculators each day. Because of limitations on production capacity, no more than

248. ## math linear alegba

Find the distance from the point (1, 1, 1) to the line given as the intersection of planes x+2y− 2z = 5 and 6x − 3y + 2z = 8.

249. ## college chemistry

if my sublimation apparatus imploded, what was the cause of it?

250. ## organic chem

Amide formation: draw the structure (or provide the IUPAC name) of the amide formed (appropriate coupling reagent required) between benzoic acid and N-ethyl ethanamine (diethyl amine)

251. ## MATH

FIND A AREA OF SQUARE ROOM WHOSE SIDE IS 6CM. THE FLOOR OF ROOM IS TO BE TILLED WITH SQUARE TILES HAVING A SIDE OF 60CM.FIND THE NO.OF TILES REQUIRED

252. ## plzzzzzzz help me out.

a beam of light consisting of two wavelengths 800nm and 600 nm is used to obtain the interference pattern in youngs double slit expt on a screen placed 1.4m away.if two slits are separated by 0.28mm,calculate the least distance from the central bright

253. ## World History

What is the significance of Roger B. Taney ?

254. ## Analytical Chemistry

How many milliliters of 0.202 M KOH should be added to 500.0 mL of 0.0233 M tartaric acid (C4H6O6; FW 150.087) to adjust the pH to 2.75? Ka1 = 1.0 x 10-13 and Ka2 = 4.6 x10-5. For this one, the Ka1 seems sort of off. The pka would be 13 which doesn't make

255. ## Physics

In a target shooting game, wooden blocks are thrown into the air and shot in flight. A block of 0.8kg has a speed of 10 m/s at the top of its trajectory when it is hit by a bullet from below at an angel 60° from horizontal. The mass of the bullet is 5.0 g

256. ## Science

How do i obtain the vapor pressure of Molten syrup?

257. ## algebra

-2x-4y=1 12y=-6x-3 I have to find the solutions, or no solution, or infinite solutions to these two equations.

258. ## math

Let f be defined as follows. y=f(x)=x^2-12x (a) Find the average rate of change of y with respect to x in the following intervals. from x = 5 to x = 6 ?? from x = 5 to x = 5.5 ?? from x = 5 to x = 5.1 ?? (b) Find the (instantaneous) rate of change of y at

259. ## Physics

A ladder (L = 7.80 m) of weight WL = 360 N leans against a smooth vertical wall. The term "smooth" means that the wall can exert only a normal force directed perpendicular to the wall and cannot exert a frictional force parallel to it. A firefighter, whose

260. ## math

Translate this sentence into an equation. 58 is the sum of 8 and gails score. Use the variable g to represent gail score.

261. ## collegemath

How high is a wall that cast A 7ft shadow at the same time a 5ft flag pole casts a 5ft shadow

262. ## physics

A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.2 m/s. If the coefficient of friction between the sled's runners and snow is 0.060 and the boy and sled together weigh 480 N, how far does the sled travel on the

263. ## Calculus

Determine convergence of divergence. If convergent, find the sum. Sum (infinity, n = 0) (e/pi)^n

264. ## math

solve for v round your answer to the nearest tenth 13/7= v/8

265. ## Chemistry

Ammonia is used as a fertilizer throughout the world. It is often produced by reacting nitrogen gas with hydrogen gas in a synthesis reaction. How much ammonia in grams can be produced from 9207 grams of nitrogen and 44 000 L of hydrogen?

266. ## MATH

WHAT is the the mystery number A=B+5,B=C+7,C=the different between13and9.D=A-B. A= B=, C=, D=

267. ## Maths

Help me rearrange this equation, v=20-9.8t

268. ## math

what is the formula for working out open cuboid.

269. ## math

what is the formula for working out open cuboid.

270. ## finance

What is the future value of \$700 deposited for one year earning a 8% interest rate annually

271. ## math

To make one bowl of party punch. 4 3/4 cupps of soda is used. How many cups of soda would you need to make 3 bowls of party punch?

272. ## Math

A fisherman has estimated that it takes 6minutes to paint each square foot of the hull of his boat. How much time should the fisherman allow for the painting of the hull, if the hull were composed of two sides, each 31.5 feet by 8.99 feet?

273. ## Statistics

A company that manufactures exercise machines wanted to know the percentage of large companies that provides on-site health club facilities. A sample of 240 such companies showed that 96 of them provide such facilities on site. a. What is the point

274. ## Physics

In a target shooting game, wooden blocks are thrown into the air and shot in flight. A block of 0.8kg has a speed of 10 m/s at the top of its trajectory when it is hit by a bullet from below at an angel 60° from horizontal. The mass of the bullet is 5.0 g

275. ## Food Chemestry

A heat exchanger is used to warm apple cider using steam as the heat source. The cider is heated from an initial temperature of 4 degrees celcius to a final temperature of 65 degree celcius. The steam enters the heat exchanger as 50% quality steam and

276. ## Chemistry

You are given a compound with an unknown concentration and you have five samples with known concentration of the compound. List 3 pieces of information you need to determine in order to calculate the unknown concentration spectrophotometrically.

277. ## Math

Stupid question time. I need to figure out how to rearrange equations to solve for x in my chemistry homework, which involves putting equations in quadratic form first. But I can't for the life of me remember how to "rearrange" them correctly. So what in

278. ## math

the pet shop owner told Jean to fill her new fish tank 3/4 full with water. Jean filled it 9/12 full . what fraction of the tank does Jean still need to fill?

279. ## math

Kevin Made five shirts. Each shirt used 2/3 yard of cloth. How many yards did he need in all?

280. ## math

A man earns #3500 per month out of which he spends 15 percent on his children's education. If he spends additional #1950 on food, how much does he have left?

281. ## Physics: Aluminum Block

A 1.65-kg aluminum block and a 6.85-kg copper block are connected by a light string over a frictionless pulley. The two blocks are allowed to move on a fixed steel block wedge (of angle è = 31.0°) as shown in the figure. Making use of the table below,

282. ## math

A man earns #3500 per month out of which he spends 15 percent on his children's education. If he spends additional #1950 on food, how much does he have left?

283. ## math

A man earns #3500 per month out of which he spends 15 percent on his children's education. If he spends additional #1950 on food, how much does he have left?

284. ## physics

Sara walks at 1.50 m/s. She notices Emily is standing at the coffee shop ahead so she accelerates at 1.55 m/s ^2. How far is emily ?

285. ## Science

How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?

286. ## math

what is 5-2x=13+2x

287. ## Math

Same kind of problem. How to rearrange to put an equation in quadratic form. Example I'm given is 49.7= 2x^2 / (1.00-x)(2.00-x) which should come out to .920x^2 -3.0x + 2.0 but I can't figure out exactly how to get to there, especially how to get the x

288. ## finding the x value

Find the value of x 19 x 27

289. ## math

The thompson family's new deck is 19 2/5 feet long. There is 12 inches in 1 foot. What is the length of the deck in inches?

290. ## math

how munch sand in cubic feet for a sandbox 6 inches high 3 feet wide 3 feet long

291. ## Geometry

How many ordered triples (a, b, c) of positive integers are there which satisfy the equation a + b + c = 10 ?

292. ## physic

a 2500 car enters curve with a radius of 45 m .if the car is moving at speed of 35 m/s.what is the centripetal force that maintains the car s circular motion the curve ?

293. ## math

what is 21/2 x 1/2

294. ## Chemistry

I want to have the details of the experiment title: Determine the equilibrium constant of a reversible reaction involving the iodine and the tri iodate ion reaction and also determine the gibbs free energy of the reaction.