# Questions Asked onDecember 2, 2012

1. ## Chemistry

Classify each of the following as a redox reaction or a non-redox reaction. Zn+CuCl2 -> ZnCl2+Cu HCl+NaOH -> H2O+NaCl 2CO+O2 -> 2CO2 SO3+H2O -> H2SO4

2. ## algebra

what is the simpliest form of the equation 3 sqrt 750 + 3 sqrt 2058 - 3 sqrt 48 possible answers 14 3sqrt6 17.5 3sqrt6 33 3sqrt6 10 3sqrt6

3. ## Physics

Two coupled boxcars are rolling along at 4.0 when they collide with and couple to a third, stationary boxcar. 1.) What is the final speed of the three coupled boxcars? 2.) What fraction of the cars' initial kinetic energy is transformed into thermal

4. ## math

cyclist rides her bike at a speed of 27 kilometers per hour. What is this speed in meters per second? How many meters will the cyclist travel in 10 seconds? Do not round your answers.

5. ## Physics

A 50 kg skater at rest on a frictionless rink throws a 2 kg ball, giving the ball a velocity of 10 m/s. Which statement describes the skaters subsequent motion? Explain please. a. 0.4 m/s in the same direction as the ball. b. 0.4 m/s in the opposite

6. ## Science

Based on the following information: A series of chemicals were added to some AgNO3(aq). NaCl(aq) was added first to the silver nitrate solution with the end result shown below in test tube 1, NH3(aq) was then added with the end result shown in test tube 2,

7. ## physics (SOS!)

a cylinder that is 20 cm tall is filled with water. If a hole is made in the side of the cylinder, 5cm below the top level, how far from the base of the cylinder will the stream land? Assume that the cylinder is large enough so that the level of the water

8. ## Physics

A baseball player uses a pitching machine to help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine ﬁres a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude of the recoil velocity of

9. ## trigonometry

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. Two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35° and to the other is 55°. How far apart are

10. ## algebra

barbara has 9 sttuffed animals. Trish has 3 times as many stuffed animals as barbara. how many stuffed aninmals does trish have

11. ## Science

______ is a major component of bones and the proteins that build muscles.

12. ## Math (trigonometry)

A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal

13. ## ap calculus

suppose that the amount in grams of a radioactive substance present at time t (in years) is given by A (t) = 160e-.70t. Find the rate of decay of the quantity present at the time when t = 4

14. ## accounting

On July 1, 2013, a firm purchased a 1-year insurance policy for \$6,300 and paid the full premium in advance. The insurance expense associated with this policy for the year ending December 31, 2013, is \$6,300. \$3,150. \$3,675. \$2,100. On January 2, 2014, a

15. ## Econ 102

Johnny Rockabilly has just finished recording his latest CD. The company can produce the CD with no fixed cost and a variable cost of \$5 per CD. A) Find total revenue for quantity equal to 10,000, 20,000, and so on. What is the marginal revenue for each

16. ## algebra

what is the simpliest form of the quotient. 4 sgrt 810 / 4 sgrt 2

17. ## English

"I watched Hassan get raped," I said to no one. Baba stirred in his sleep. Kaka Homayoun grunted. A part of me was hoping someone would wake up and hear, so I wouldn't have to live with this lie anymore. But no one woke up and in the silence that followed,

18. ## Chemistry

For a particular reaction, ΔH° is 20.1 kJ/mol and ΔS° is 45.9 J/(mol·K). Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction? The reaction is spontaneous for

19. ## Physics URGENT!!!

A commuter train passes a passenger platform at a constant speed of 31 m/s. The train horn is sounded at its characteristic frequency of 330 Hz.Assume the speed of sound is 343 m/s. (a) What is the frequency detected by a person on the platform as the

20. ## physics

The figure shows an overhead view of a uniform 2.00-kg plastic rod of length 1.20 m on a very slick table. One end of the rod is attached to the table, and the rod is free to pivot about this point without friction. A disk of mass 36.0 g slides without

21. ## physics

A person with perfect pitch sits on a bus bench listening to the 444 Hz horn of an approaching car. If the person detects a frequency of 480 Hz, how fast is the car moving?

22. ## Calculus

A company offers the following schedule of charges: \$30 per thousand for orders of 50,000 or less with the charge per thousand decreased by 37.5 cents for each thousand above 50,000. Find the order which will make the company's receipts a maximum? How do

asked by A company offers the following schedule of charges
23. ## Chemistry

need help balancing the following. redox reaction in acidic solution. Clo3-+Cl->>Cl2+ClO2

24. ## physics

a soccer player kicks a ball into the air at an angle of 36.0 above the horizontal. the initial velocity of the ball is +30.0m/s. how long is the soccer ball in the air?

25. ## Chemistry

Can someone check my answers? What is the oxidation state of each element in K2Cr2O7? K +1 Cr +6 O -2 What is the oxidation state of each element in SO32–? S +4 O -6

26. ## Physics

A lighthouse beacon alerts ships to the danger of a rocky coastline. Part A According to the lighthouse keeper, with what speed does the light leave the lighthouse? v/c= A boat is approaching the coastline at speed 0.5. According to the captain, with what

27. ## physics

A block of wood will sink 10 cm in freshwater. How far will it sink in seawater. The specific gravity of seawater is 1.025. I'm confused as to how to approach to problem

28. ## math

A jet is flying through a wind that is blowing with a speed of 45 mi/h in the direction N 30° E (see the figure). The jet has a speed of 775 mi/h relative to the air, and the pilot heads the jet in the direction N 45° E.

29. ## statistics

Refer to the Baseball data, which report information on the 30 Major League Baseball teams for the 2010 season. Let the number of games won be the dependent variable and the following variables be independent variables: team batting average, number of

30. ## Physics

A solid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1 m, they both have the same 1. momentum. 2. inertia. 3. speed. 4. change in potential energy. 5. kinetic

31. ## math

Can the least common denominator of 4/9 and 13/17 be less than 17? Explain

32. ## Calculus

Consider a hemispherical bowl of radius 10cm. (4 points) If the water level in the bowl is h cm deep, find the radius of the surface of the water as a function of h. (6 points) The water level drops at a rate of 0.1 cm per hour. At what rate is the radius

33. ## Computers

Develop a use case diagram for a department store credit card system. Include at least two actors and four use cases.

34. ## physics

1. A football player weighing 75 kg running at 2 m/s toward west tackles a 70 kg player running at 1.5 m/s in the opposite direction. What is the final velocity of the players if they both fall together?

35. ## Math (trigonometry)

A surveyor wishes to find the height of a mountain. He selects points A and B on level ground along the same line of sight to the mountain. He measures the distance AB to be 1503 m and the angles of elevation of the top of the mountain from the points to

36. ## Physics!!!

Question: A(n) 3.17 m long pendulum is released from rest when the support string is at an angle of 38.6 degrees with the vertical. The acceleration of gravity is 9.8 m/s2 . What is the speed of the bob at the bottom of the swing? Answer in units of m/s

37. ## trigonometry

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. Two motorists are driving cars on the highway, both on one side of the plane. If the angle of depression to one car is 34° and to the other is 51°, how far apart are the

38. ## physics help me bob!

A rock is thrown from the roof of a building with a velocity v0 at an angle α0. The height of the building is h. (i)Calculate the horizontal distance traveled by the projectile before it strikes the ground. (ii)Show that the speed of the rock just before

39. ## STATISTICS

A poll of 10 voters is taken in a large city. Let X be the number of voters in favor of candidate A for mayor. Suppose that 60% of all the city's voters favor this candidate. The mean and standard deviation are closest to

40. ## algebra

A boat is tied to a pier with a 25-foot rope so that the distance between the top of the pier and the top of the boat deck is 7 feet. If the water level hoes down 8 feet with the low tide , how much closer ( in feet) is the boat to the base of the pier?

41. ## English

Below is the last stanza of a poem, "Dover Beach," written in 1876 by Matthew Arnold. Ah, love, let us be true To one another! for the world, which seems To lie before us like a land of dreams, So various, so beautiful, so new, Hath really neither joy, nor

42. ## Chemistry

The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq)

43. ## physics

A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 2.97 103 m. During this performance the pilot whose weight is 835 N, maintains a constant speed of 2.25 102 m/s. (a) When the pilot is at the highest point of the loop

44. ## physics

Ball A, moving with an initial speed of 3 m/s, has a head-on collision with another ball B at rest, which is twice as massive as A . What are the final velocities of A and B if the collision is elastic?

45. ## Geometry

Given: angle BAC is congruent to angle ACD, segment BD bisects segment AC, and segment AC bisects angle BCD. Prove: quadrilateral ABCD is a rhombus.

46. ## Legal Issues in Health Sciences

You are the head of the health information management department at a hospital. An FBI agent has arrived at your office with a search warrant in hand. He asks to speak with you about the hospital's helth records. How should you respond?

47. ## history ASAP

why did the environmental movement prove to be so divisive? Whose interest were threatened?

48. ## physics

You stand on the end of a diving board and bounce to set it into oscillation. You find a maximum response in terms of the amplitude of oscillation of the end of the board when you bounce at frequency f. You now move to the middle of the board and repeat

49. ## statistik

can you show me the caculation :) Last year, 50% of MNM, Inc. employees were female. It is believed that there has been a reduction in the percentage of females in the company. This year, in a random sample of 400 employees, 180 were female. a.Give the

50. ## Accounting

On July 1, 2013, a firm purchased a 1-year insurance policy for \$6,300 and paid the full premium in advance. The insurance expense associated with this policy for the year ending December 31, 2013, is \$6,300. \$3,150. \$3,675. \$2,100. On January 2, 2014, a

51. ## Algebra

Could someone please help me with this word problem? The City Zoo has different admission prices for adults and children. When three adults and two children went to the zoo, the bill was \$80.88. If two adults and three children got in for \$76.47, then what

52. ## Chemistry

Place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and sulfur.

53. ## MEDICAL CODING AND BILLING

I need some help finding the ICD-9-CM code for Excision of lrft flank soft tissue mass with layered closure measuring 4cm, with margins prior to excision?

54. ## Physics

Note: Take East as the positive direction. A(n) 86 kg ﬁsherman jumps from a dock into a 131 kg rowboat at rest on the West side of the dock. If the velocity of the ﬁsherman is 5.2 m/s to the West as he leaves the dock, what is the ﬁnal velocity of

55. ## maths

I am equivalent to 1/2 the sum of my numerator and denominator is 15. What fraction am I?

56. ## Atomic Size

Place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and sulfur.

57. ## statistik

can you show me the calculation ;) The life expectancy of computer terminals is normally distributed with a mean of 4 years and standard deviation for 10 months. a. What is the probability that a randomly selected terminal will last more than 5 years? b.

58. ## Chemistry

Nitroglycerin, an explosive compound, decomposes according to the equation below. 4 C3H5(NO3)3(s) 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g) Calculate the total volume of gases when collected at 1.2 atm and 25°C from 1.3 102 g of nitroglycerin.

59. ## chemistry

(a) Construct a Lewis structure for O2 in which each atom achieves an octet of electrons. (Assign lone pairs where appropriate.) i am using marvin sketch and don't know what i need to show

consider a four year project with the following information: initial fixed asset investment=420,000;staright-line depriciation to zero over the four year life; zero salavage value; price=25; variable cost=16; fixed cost=180,000; quantity sold=75,000 units;

61. ## Honors Chemistry

How do I write a complete ionic equation and net ionic equation for: 2HCl(aq)+Ca(OH)2(aq) ¨ 2H2O(l)+CaCl2(aq) ?

62. ## Physics

A 83.5 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 35.5 m behind the ship, at rest relative to the spaceship. The only

63. ## statistics

Consider a machine that fills soda bottles. The process has a mean of 15.9 ounces and a standard deviation of 0.06 ounces. The specification limits are set between 15.8 and 16.2 ounces. a)Compute and interpret the machine’s Cp b)Compute and interpret the

64. ## Computer Science (Programming Logic And Design)

Create a program that outputs a letter grade for a student based on the following table: From To Grade 90 100 A 80 89 B 70 79 C 0 69 F I don't understand how to do this. Would you mind helping me get the answer to this Program?

65. ## programming

How do i Create a program that determine the shipping cost for an order based on the following table: From To Price \$0.00 \$19.00 \$2.95 \$20.00 \$49.99 \$3.95 \$50.00 \$74.99 \$4.95 \$75.00 \$1000.00 \$Free I don't understand how to do this...Would anyone please

66. ## physics

A 70.5 football player is gliding across very smooth ice at 2.25 . He throws a 0.430 football straight forward.

67. ## frequency-physics

Two sirens A and B are sounding so that the frequency from A is twice the frequency from B. Compared with the speed of sound from A, which of the following statements is true?

68. ## chemistry

What is the pH of a solution when 1ml of 0.10M NaOH is added to 100ml of buffer containing 0.1M acetic acid and 0.1M sodium acetate?

69. ## Chem 100L

Calculate the molarity of an aqueous NaOH solution if 32.00ml of it is required to titrate .6789g of oxalic acid to a phenophthalein end-point. the balanced chemical equation is H2C2O4 + 2NaOH ---> Na2C2O4 + 2H2O

70. ## algebra

a piece of wire measuring 20 feet is attached to a telephone pole as a guy wire. the distance along the ground from the bottom of the pole to the end of the wire is 4 feet greater than the height where the wire is attached to the pole. how far up the pole

71. ## Any Veternarian here that I can interview?

I am doing a career report on the job of a vet and would like an interview as one of my sources. Is there any vet that would be willing to answer these three questions? 1.What are the educational and training requirements for this career? 2. What career

72. ## ochem 2

1. Below are the IR and 1H NMR spectra for a compound with the molecular formula of C11H16O. List all the possible information coming from each spectra, and then use this to elucidate the structure from the possible compounds shown. Briefly explain your

73. ## Computer (Programming Logic and Design)

How do i Create a program that determine the shipping cost for an order based on the following table: From To Price \$0.00 \$19.00 \$2.95 \$20.00 \$49.99 \$3.95 \$50.00 \$74.99 \$4.95 \$75.00 \$1000.00 \$Free I don't understand how to do this...Would anyone please

74. ## chemistry

4.05 g of an unknown gas at 73 °C and 1.00 atm is stored in a 2.25-L flask.

75. ## statistics

Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky

76. ## Physics

The force on a wire is a maximum of 6.5E-2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on.

77. ## Chemistry

Place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and sulfur.

78. ## English

what are some emotive words used in MLK's speech? and what are some emotive words used in Old Major's speech? (Animal Farm) thank you!

79. ## physics

A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find

80. ## Physics

Use 5.98 × 10 24 kg as the mass of the Earth. A 2350 kg meteorite has a speed of 143 m/s just before colliding head-on with the Earth. Determine the recoil speed of the Earth. Answer in units of m/s

81. ## Math

Are drawing a black and red card independent or mutually exclusive? Are drawing a black card and queen independent? Are drawing a face card and queen independent?

82. ## Visual Basic 2010

Direction: Write a program that displays the output shown in a list box. The last two lines of the output should be displayed by one or more Sub procedures using data passed by variables from an event procedure. Problem One: Assume that the current date is

83. ## Chemistry

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. Mo^3+ -> MoO2^2+

84. ## physics

A 14.0-kg chair is at rest on a flat floor. The coefficient of static friction between the chair and the floor is 0.450. A person tries to move the chair by pushing on the chair with a force directed at an angle of 30„a below the horizontal. What is the

85. ## maath

how many times did the minute hand of a clock rotate during March this year ? please explain how you work it out,thanks

86. ## Geometry Honors

Find 2 points on the perpendicular bisector of line AB. Verify your results by showing each point is equidistant from A and B. 34.) A (0,0) B 90,4) 36.) A (3,3) B (3,-3) 38.) A (3,0) B (1,4)

87. ## Physics

Two billard balls move toward one another.The balls have identical masses, and the collision is perfectly elastic. The initial velocity of the balls are +30 cm/s and -20 cm/s, what is the velocity of each ball after the collision?

88. ## Programming (CSI 150 Programming Logic and Design)

Create a program that outputs a letter grade for a student based on the following table: From To Grade 90 100 A 80 89 B 70 79 C 0 69 F I don't understand how to do this. Would you mind helping me get the answer to this Program?

89. ## precalculus i dont understan this hw

How to prove sec x - tanx sinx= cosx

90. ## Statistics

Is is possible for the regression equation to have none of the actual (observed) data points located on the regression line?

91. ## Chemistry

How many grams of CuCl2 are required to prepare 1270. g of a 1.75% (by mass) CuCl2 solution?

92. ## Macroeconomics

Consider the following data: The money supply in \$1 trillion, the price level equals 2, and real GDP is \$5 trillion in base-year dollars. What is the income velocity of money?

93. ## Math

If X = 13 units, Y = 5 units, and h = 2 units, then what is the area of the trapezoid shown above?

94. ## Trigonometry

what is z= -2-2square root of 3i in trigonometric form.

95. ## math help [lease?

What strategies do you use to convert a fraction to a decimal and a decimal into a fraction?

96. ## algebra

1.what is the simplest form of the producy sqrt 50x^7y^7 * sqrt 6 xy^4 2. What is the simplest form of the radical expression 4^3 sqrt 3x + 5^3 sqrt 10x 3. What is the simplest form of the radical expression sqrt 2 + sqrt5 / sqrt 2 - sqrt 5 if someone

97. ## physics

A 67.3 kg ice skater moving to the right with a velocity of 2.52 m/s throws a 0.151 kg snowball to the right with a velocity of 33.7 m/s relative to the ground. What is the velocity of the ice skater after throwing the snowball? Disregard the friction

98. ## math

There were 20% more boys than girls in a swimming club. After 50 girls left, there were twice as many boys as girls in the club. How many boys were there in the club?

find all points having an x-coordinate of 2 whose distance of the point (-1-2)is 5.

100. ## Chemistry

What volume (in mL) of 0.45 M Na2SO4 solution is needed to precipitate all the barium, as BaSO4(s), from 14.5 mL of 0.15 M Ba(NO3)2 solution? Ba(NO3)2(aq) + Na2SO4(aq)= BaSO4(s) + 2 NaNO3(aq)

101. ## statistics

Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky

102. ## Stats

62.Refer to the Baseball 2009 data, which report information on the 30 Major League Baseball teams for the 2009 season. a. At the .05 significance level, can we conclude that there is a difference in the mean salary of teams in the American League versus

103. ## math

find the number of fifths in one and four fifths

104. ## physics

A race car travels 90 m/s around a circular track of radius 93.5 m. 2.9 mg µ = 0.12 19◦ What is the magnitude of the resultant force on the 2900 kg driver and his car if the car does not slip?

105. ## Math

A person is pulling a freight cart with a force of 70 pounds. How much work is done in moving the cart 120 feet if the cart's handle makes an angle of 18° with the ground

106. ## UNIVERSITY PHYSICS 1

find the magnitude of vectors A=?+4j+4k B=?+2j+3K if the angle them 15 deegre a.) by scalar product b.) by vector product

107. ## chemistry

The water gas shift reaction used commercially to produce H2(g): CO (g)+ H2O (g) --> CO2 (g) + H2(g). DeltaH=-41.2 kJ/mol Delta S= -42.1 J/mol*K Delta G= -28.6 kJ\mol Determine Kp at 850 K

108. ## Physics...

While following the directions on a treasure map, a pirate walks 23.5 m north, then turns and walks 2.7 m east. What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m

109. ## Chemistry

What is the molarity of this dichromate solution? A potassium dichromate solution of an unknown molarity was used to titrate a solution of FeSO4 prepared by dissolving a 0.350g of pure iron wire in H2SO4 and reducing the FE3+ produced to FE2+. 36.24 mL of

110. ## Chemistry

What is the net chemical equation of: Reaction 1: 3.3 kcal/mol+glucose+Pi --> glucose-6-phosphate+H2O Reaction 2: ATP+H2O --> ADP+Pi+7.3 kcal/mol AND Calculate the amount of energy released in the coupled reaction. energy released: ____kcal/mol

111. ## Math

6x-4y=54 -9x+2y=-69 Which system would work best to solve? Please show work and solve. (all steps) Thank You I honestly don't know how to do this.

A 60.00 cm guitar string under a tension of 46.000 N has a mass per unit length of 0.11000 g/ cm. (a) What is the speed of the wave? (b) What is the fundamental wavelength for this string? (c) What is the fundamental frequency for this string? (d)What is

113. ## Calculus

find the point on the graph of the function that is closest to the given point: f(x)=(x+1)^2 (5,3)

114. ## Math (trigonometry)

How do you get the second triangle when you have an ambiguous case of sine law? For example, if you are given the following information for a triangle: a = 7.2 mm, b = 9.3 mm,

115. ## physics

A golfer takes two putts to sink his ball in the hole once he is on the green. The first putt displaces the ball 2.20 m east, and the second putt displaces it 6.58 m south. What displacement would put the ball in the hole in one putt?

116. ## algebra

Identify all angles with a measure of 58 degrees in the diagram below. . 1/58 degrees . 4/3 . 5/6 . 8/7 Show your work

117. ## Physics

A projectile is fired at v0 = 394.0 m/s at an angle of θ = 68.7o with respect to the horizontal. Assume that air friction will shorten the range by 28.1%. How far will the projectile travel in the horizontal direction, R?

118. ## Physics

There is a door that is 1.0 m wide and can rotate about a vertical axis without friction. The door’s mass is 15 kg and is free to swing open. Someone fires a 10 g bullet at 400 m/s into the exact center of the door, perpendicular to it. Find the angular

119. ## chemistry

use the following data, as appropriate, to estimate the molarity of a saturated aqueous solution of Sr(IO3)2. Molarity of a saturated aqueous solution of Sr(IO3)2 Sr(IO3)2(s) delt h kJ/mol=-1019.2 delta G kJ/mol=-855.1 delta S= 234 J mol-1K-1 Sr^2+(aq)

120. ## phys

Heat Q flows spontaneously from a reservoir at 481 K into a reservoir at 298 K. Because of the spontaneous flow, 2760 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 298 K and a reservoir at 249 K. Find

121. ## physics

A 14.0-kg chair is at rest on a flat floor. The coefficient of static friction between the chair and the floor is 0.450. A person tries to move the chair by pushing on the chair with a force directed at an angle of 30„a below the horizontal. What is the

122. ## Programming Logic

Create a program that determine the shipping cost for an order based on the following table: From To Price \$0.00 \$19.99 \$2.95 \$20.00 \$49.99 \$3.95 \$50.00 \$79.99 \$4.95 \$75.00 \$1000.00 Free

123. ## Chemistry105

When 50.0 Ml of 1.00 m chi was mixed with 50.0 ml of 1.00 m NaOH in a calorimeter the temperature rose from 25.0 c to 32.0 c calculate the heat change for the reaction assuming that the total volume of the solution is 100.0 ml and the specific heat is 1.00

124. ## Chemistry

How do I balance this redox reaction? MnO4- + Fe2+ + H+ + Mn2+ + Fe3+ + H2O I don't understand. Don't I need a product?

125. ## statistics

say that you have a distribution of exam scores with a mean of 57 and a standard deviation of 7. if a student in the class has a standard score equal to 2.429, what would their raw score on the exam be?

126. ## university physics

find the magnitude of vectors A=?+4j+4k B=?+2j+3k if angle between them is 15 deegre a) by scalar product b) by vector product

127. ## Math Help

It takes Andy and Ben the same amount of time to eat 1 large piece of chocolate. It takes Charlotte 3 more mins than Andy and Ben to eat the same piece of chocolate. One day, Andy, Charlotte and Ben share 2 pieces of chocolate among them. It takes them 5

128. ## Probability

Can someone please help me? certain medical diagnostic test is used to determine if people have pinkyitis and it is known that 1 in 1300 Americans has the disease. The test correctly diagnoses the presence of pinkyitis 97% of the time and it correctly

129. ## Physics

The vector position of a 3.40 g particle moving in the xy plane varies in time according to the following equation. At the same time, the vector position of a 5.05 g particle varies according to the following equation. For each equation, t is in s and r is

130. ## Computer Science (Programming Logic And Design)

Create a program that outputs a letter grade for a student based on the following table: From To Grade 90 100 A 80 89 B 70 79 C 0 69 F I don't understand how to do this. Would you mind helping me get the answer to this Program?

131. ## Chemistry

1. gas to liquid 2. liquid to gas 3. solid to gas 4. solid to liquid 5. gas to solid 6. liquid to solid Please label the reactions above into the groups: ΔH=+, ΔS=+ ΔH=+, ΔS=- ΔH=-, ΔS=+ ΔH=-, Δs=-

132. ## english

How to write a fictional narrative in a regional style????? M Please give me ideas and title stories!!!!!!

133. ## Chemistry

Is the equation of the chemical reaction that occurs when you blow your breath through boiling water? CO2 + H2O -> H + HCO3

134. ## Math

It takes Andy and Ben the same amount of time to eat 1 large piece of chocolate. It takes Charlotte 3 more mins than Andy and Ben to eat the same piece of chocolate. One day, Andy, Charlotte and Ben share 2 pieces of chocolate among them. It takes them 5

135. ## Programming (CSI Programming Logic and Design)

Create a program that outputs a letter grade for a student based on the following table: From To Grade 90 100 A 80 89 B 70 79 C 0 69 F I don't understand how to do this. Would you mind helping me get the answer to this Program?

136. ## Programming Languages (Computer Logic and Design)

Create a program that determine the shipping cost for an order based on the following table: From To Price \$0.00 \$19.99 \$2.95 \$20.00 \$49.99 \$3.95 \$50.00 \$79.99 \$4.95 \$75.00 \$1000.00 Free

137. ## Computer (Programming Logic and Design)

How do i Create a program that devtermine the shipping cost for an order based on the following chart: From To Price \$0.00 \$19.00 \$2.95 \$20.00 \$49.99 \$3.95 \$50.00 \$74.99 \$4.95 \$75.00 \$1000.00 \$Free

138. ## physics

A 5.9 m wire with a mass of 79 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.087 s for the resulting wave to reach the other end. 1. What is the tension in the wire? 2. Calculate the tension for a 89-g wire.

139. ## physics

a 1.00 x 10 W electric motor is used to life a 955 kg object vertically 25.0 m at a constant velocity. How much time does it take to lift the object.

140. ## Math 8R

Which of the following is NOT a real number? a) 0.0005 b) 13/0 c) square root of 1/16 I picked c, am i correct???????

141. ## Cultural Anthropology 101

its a fill in the blank. My answer "fieldwork"

142. ## Statistics

Consider a machine that fills soda bottles. The process has a mean of 15.9 ounces and a standard deviation of 0.06 ounces. The specification limits are set between 15.8 and 16.2 ounces. a)Compute and interpret the machine’s Cp Cp = process capable

143. ## Statistics

Tony’s father, an accountant, has been listening to Tony tell him about Type I errors and α = .05. He responds: “.05? That means you’re making an error one time in twenty! If I made errors 5 percent of the time I’d be out of a job so fast it would

144. ## Chemistry105

When 50.0 Ml of 1.00 m chi was mixed with 50.0 ml of 1.00 m NaOH in a calorimeter the temperature rose from 25.0 c to 32.0 c calculate the heat change for the reaction assuming that the total volume of the solution is 100.0 ml and the specific heat is 1.00

145. ## Statistics

Research Question for Parts 1 and 2: A health psychologist wants to study overall student health on a university campus. One measure he decides to take is that of minutes exercised per week. Assume that we know from previous studies that the population

146. ## Statics

Assume that the population is normal. A sample of size 100 is taken. The resultant sample data has a mean of 48 and a standard deviation of 15. Construct the 99% confidence interval for the population mean.

147. ## Math 8R - Help!!!!!!!!

In 2011, the population of the United States was about 3.12 x 108. The population of the Japan was about 1.27 x 108. About how much more was the population of the United States than Japan? a) 1.85 x 108 b) 1.85 x 1016 c) 1.85 x 1064 3.12 x 108 + 1.27 x 108

148. ## English

"It is better to lead from behind and to put others in front, especially when you celebrate victory when nice things occur. You take the front line when there is danger. Then people will appreciate your leadership." What does this quote mean?

149. ## Physics

A slingshot is pulled back 55cm down to the ground with a rock in its pouch. The slingshot has a spring constant of 862N/m. The mass of the rock is 700g. What height is the rock when its velocity is 12m/s?

150. ## English

“I am only one, but still I am one. I cannot do everything, but still I can do something; and because I cannot do everything, I will not refuse to do something that I can do.” Please explain what this quote means, thanks!

151. ## Physics

What is the difference between converging and diverging waves? What happens to a converging wave after it has converged?

152. ## Computer Science (Programming Logic And Design)

How do i Create a program that determine the shipping cost for an order based on the following chart: From To Price \$0.00 \$19.00 \$2.95 \$20.00 \$49.99 \$3.95 \$50.00 \$74.99 \$4.95 \$75.00 \$1000.00 \$Free

153. ## chemistry-rate of reaction

The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 3.591×10−3 M−1s−1. What is the initial rate of reaction in a reactor

154. ## chemistry

1. Ceramic material made by the sol-gel process involve the reaction of a. water and acids. b. ethanol and water. c. water and metal oxides. d. acids and metal alkoxides. e. water and metal alkoxides. my ans. c 2. The step in the sol-gel process that forms

155. ## Chemistry

10.0 grams of magnesium reacted with fluorine to produce MgF2 Find balance equation: 2MgF2=2MgF 1)can someone explain to me how many grams of fluorine reacted with magnesium. 2)How many grams of MgF2 were formed in the reaction?

156. ## Applied Behavioral

Which of followign pairs of sexually-transmitted infections (STIs) are most easily cured. 1. HIV and Herpes 2. Chlamydia and Gonorrhea 3. HIV and Chlamydia 4. Syphilis and Herpes My answer Syphillis and Herpes

157. ## math

The demand function for a certain brand of CD is given by the following equation where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p=-0.01x^2-0.1x+6 Determine the consumers' surplus if

158. ## Math 8R - HW Qs. Check

Write the product of (1.7 x 10 to the 9th power) x (1.4 x 10 to the 2nd power) in scientific notation My Answer - 2.38 x 10 to the 11th power am i correct and please reply this post

159. ## Statistics

If a research report contains the results of an independent measures ANOVA as follows: F(3,28) = 5.36, p

160. ## Geometry

Does SSSS (four sides of one are congruent to four sides of the other) work as a congruence theorem (a way to prove they are congruent) for quadrilaterals? Explain.

161. ## english

another word for nothing more than? For example, if you say that advice is nothing more than

162. ## Physics

A man pulls a 50 kg box with an acceleration of 2m/s^2 across the floor. He applies a 200 N force at an angle of 30 degrees what is the coefficient of the kinetic friction?

163. ## Science

The process of changing free nitrogen gas into a usable form of nitrogen is called?

164. ## chemistry

HELPPPP!!!! This is a lab, and i need help with the equations please!! Thank you !! Heat of fusion data table : Mass of foam cup = 3.57g Mass of foam cup + warm water = 104.58g Mass of foam cup + warm water + melted ice = 129.1g Temperature of warm water =

165. ## Waves & Tension

A 5.9 m wire with a mass of 79 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.087 s for the resulting wave to reach the other end. 1. What is the tension in the wire? 2. Calculate the tension for a 89-g wire.

166. ## math

how many times did the minute hand of a clock rotate during April this year?

167. ## statistik

Below are random sample of 4 observations. 25,75,32,56 Based on the given information, determine whether or not the population from which this sample was taken is significantly different from 48 at 95 percent confidence level. (Assume the population is

168. ## physics

Question Part Points Submissions Used A thin cylindrical rod of length 3.00 m and mass 1.5 kg has two spheres attached on its ends. The centers of the spheres are 1.50 m from the center of the rod. The mass of each sphere is M = 0.72 kg. The rod and

169. ## Statics

In a chocolate chip cookie investigation, you decide to compare two cookie sources. Source 1: Mom mails to you a package containing a dozen of her homemade chocolate chip cookies. Source 2: You purchase a dozen of a store brand of chocolate chip cookies at

170. ## physics

I'm not sure how to deal with this problem (we're just starting the unit)... I need to find the average voltage induced into a 100 turn coil by a vertical wire when the wire's current drops from 602A to 0A in 0.01 seconds. ...if the coil was drawn as a

171. ## Algebra

Please show me step by step in finding the center and the radius of the circle, then graphing if possible: (x-3)²+y²=6 Thanks

172. ## Algebra II

You have purchased a VCR for \$180. You also joined a video rental store where you can rent movies for \$3 each. Suppose that the cost of admission to a movie theater is \$6.00. How many videos must you rent to make your average cost per video less than

173. ## Chemistry

How much water must be added to 482. mL of 0.201 M HCl to produce a 0.147 M solution? (Assume that the volumes are additive.)

174. ## chemistry

use the following data, as appropriate, to estimate the molarity of a saturated aqueous solution of Sr(IO3)2. Molarity of a saturated aqueous solution of Sr(IO3)2 Sr(IO3)2(s) delt h kJ/mol=-1019.2 delta G kJ/mol=-855.1 delta S= 234 J mol-1K-1 Sr^2+(aq)

175. ## math;SOS

solve the logarithmic equation. log(5x+7)=1+log(x-9)

176. ## physics

A 2.24 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.45 N/m. The mass is displaced 3.06 m to the right from its equilibrium position and then released, which initiates simple harmonic

177. ## physics

bullet of mass 15 gm is shot horizontally into a 15 kg block of wood attached to a spring of spring constant 1000 N/m. The bullet remains inside the block after impact. The force of the impact compresses the spring 10 cm. What is the velocity of the

178. ## college algebra

Need help finding the x-intercepts y=x^3+x^2-100x-100 I know that the answer is (10,0),(-10,0),(-1,0) I don't understand how to get (-10,0) and (10,0)

179. ## Statics

You suspect that, on the average, professional baseball players are older than professional football players. A random sample of 30 professional baseball players has a mean age of 28.8 years (assume ó = 4). A random sample of 40 professional football

180. ## physics

the acceleration of an object and the net for acting on it are proportional

181. ## Applied behavioral Science

Of those below, the most important factors insecndary aging are porbly 1 race and culture income and education amount of secual activit and STIs race and ethnicity Answer: race and culture

182. ## Chemistry

When will a salt produce a neutral solution? 1-if it contains the conjugate base of a strong acid 2-if it contains the conjugate base of a weak acid 3-if it contains the conjugate acid of a weak base

183. ## Geometry

The lengths of the sides of quadrilateral PQRS are PQ=x^2, QR=20-x, RS=x^2-4, PS=1-4x. Find a value of x that will make PQRS a kite (two pairs of congruent consecutive sides).

184. ## Finance

Rancher Rick purchased an additional 80 acres of hay ground to produce hay for his Angus herd. He paid \$700/acre. He paid \$20,000 down and took out a 10 year loan with interest calculated using add-on interest for the rest of the cost of the land. Assume

185. ## science

how much heat is required to heat 500 g of copper from 20 degree celsius to 80 degree celsius? specific heat of copper is 0.093 cal/g- degree celsius

186. ## math fractions

magazine wants to make \$160 for each page of advertisement sold. What might magazine charge for each size ad if ads can be 1/32

187. ## Chemistry-Just checking my answer

for template DNA (non-GMO,GMO,and test food) we set up a PCR reaction that included "plant' primers. Assume that all three foods had usable plant DNA. Which template DNA (non-GMO,GMO, test food) would you expect to show successful amplification of the

188. ## Chem

1) Mg + F2 = MgF2 10.00 grams of magnesium reacted with fluorine to produce MgF2 Find : a) Balance the reaction b) How many grams of fluorine reacted with magnesium. Answer:____________ c) How many grams of MgF2 were formed in the reaction.

189. ## chemistry

A galvanic cell consists of a Mn/Mn^2+ electrode (E° = -1.18v) and a Fe/Fe^2+ electrode (E° = -0.44v). Calculate the ratio [Mn2+]/[Fe2+] if E_cell = .78v at 25°C. I know to use the nernst eq. E_cell = E°_cell - RT/nF * ln(Q) where Q is the ratio I'm

190. ## Statics

17. The Student Health Service assumes, based on historical data, that the height of female students is normally distributed with a standard deviation of 3 inches. The school nurse wants to estimate the average height of this year’s entering female

191. ## Physics

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

192. ## PHYSICS HELP

1 1200kg car is accelerating at 1.6m/s/s. If the coefficient of friction is .15, what is the force supplied by the engine? please help! urgent!

193. ## Cultural Anthropology 101

Ethnocentrism refers to: (Points : 1) the need to focus on another society’s problems. the judging of another culture in terms of your own. ***the view that your own society is inferior to others. the view that people’s ideal behavior is better than

194. ## Trigonometry

2. Choose the point that lies on the curve r = 2 – 3 sin θ. A. (-5, 3π/2) B. (–2, π) C. (1, π/2) D. (5, π/2 3. Which of the following is not an approximate solution of x5 – 1 = 0? A. 0.3090 – 0.9511i B. 0.8090 + 0.5878i C. 0.3090 + 0.9511i D.

195. ## Thanks

Thanks David Q/R for your kind help.It did answer my question. They say for less then five failure and successes we use "exact method" and I was not finding about exact method. Thanks

196. ## Physics

(a) What is the shape of the radio waves from a satellite when they reach a dish antenna on the roof of a building? Explain. (b) Explain what happens to these waves when they reach the dish.

197. ## Statistics

You are wondering whether male or female students pay more for books and materials at the U of C. You find 5 male friends at the U of C and find that they spent an average of \$680 with a standard deviation of \$5. You find 4 female friends at the U of C and

198. ## precalc pre ap

If theta is a rotation angle that terminates in quadrant ll and sin of theta is 5/13, find cos of theta and tan of theta. Use the first Pythagorean identity to solve for cos of theta and use quotient identity to solve for tan of theta.

199. ## Probability

Can someone please help me. A single card is selected from a standard 52-card deck. B= the drawn card is black; R= the drawn card is red; Q= the drawn card is a queen; F= the drawn card is a face card ( a king, queen or jack). Without finding the

200. ## Physics HELP!

The overall length of a piccolo is 30.6 cm. The resonating air column vibrates as in a pipe that is open at both ends. Assume the speed of sound is 343 m/s. (a) Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is

201. ## Geometry

Does SSSS postulate work as a congruence theorem for quadrilaterals? Explain.

202. ## Science

Express mass of the Earth in unit of M. Take ME = 6 x 1024kg.

203. ## English

For an essay for my honors English class, I am comparing the character of Roger Chillingworth to a knife. While I do have some ideas to write about, do you guys have any tips on ideas I could use? More importantly, to those who have read the book, what

204. ## RE:ENGLISH QUOTE

Here is my meaning of Hellen Keller's quote: It means that by using my voice I can do something. I may not be THE one but AT LEAST I AM one. I know that I can't do everything but the thing is, I CAN do SOMETHING. I will do what I can do to make a

205. ## Physics

When a metal pipe is cut into two pieces, the lowest resonance frequency in one piece is 244Hz and that for the other is 454Hz. What resonant frequency would have been produced by the original length of pipe? (Assume the speed of sound in air is 345 m/s) ^

206. ## Algebra

The number is 14 more then the number to the sum of 30

208. ## Math

Mark bought 54 cm of lace and 2m 45cm of black lace. How much total lace in meters did he buy?

209. ## Math

Factor the following. 3x^3+49=x^2+147x

210. ## social studies

can someone help on this debate I have? so the question is do you support the treaty of versailles? the teacher said that I'm going to support it but I don't know what to write.

211. ## chemistry

Suppose a car's motor draws 231 Ampere of current for 6.3 sec to start the car. What mass of Pb is oxidized in the lead-acid battery to supply this much electricity?

212. ## Chemistry

What volume a sample of 67.0 grams of nitrogen gas (N2)will occupy at -25degrees C and 3 atm pressure?

213. ## Algebra II

You have purchased a VCR for \$180. You also joined a video rental store where you can rent movies for \$3 each. Suppose that the cost of admission to a movie theater is \$6.00. How many videos must you rent to make your average cost per video less than

214. ## economics

While sitting in your office one evening, you begin to think about some of the key microeconomic messages you want to communicate to the Board. (Key concepts include, but are not limited to, supply and demand, pricing, competition, costs & production, and

215. ## math

A family drives 600 miles in 2 days. The second day they drive 120 miles less than the first day How many miles did they drive the first day?

216. ## physics

find the magnitude of vector by scalar and vector A= ? + 4j +4k B= ? + 2j + 3k if the angle between them 15 degrees.

217. ## math

a box contains more than 25 but fewer than 40 balls.When the balls are counted by 3 there is 1 left over.When the balls are counted by 5 there are 2 left over.How many balls are in the box?

218. ## capacitors

how would you carry out a suitable test to determine the relationship between voltage and current when charging and discharging a capacitor

219. ## physics

HOw much heait is needed to raise the temperature of 5 kg of water 5 degrees celsius

220. ## Intermediate Algebra

A 6-foot man cast a shadow of 2.5ft. At the same time of the day, a tree cast a shadow of 25 ft. How tall is the tree?

221. ## wireless communications

what is the period of the space shuttle traveling at 250km above the earth and what is its velocity

222. ## Physics

A spy satellite orbiting at 160 km above Earth's surface has a lens with a focal length of 3.6 m and can resolve objects on the ground as small as 30 cm. For example, it can easily measure the size of an aircraft's air intake port. What is the effective

223. ## physics

What is the wavelength associated with a golf ball of mass 45 g driven off the tee with a velocity of 30 ms-1.

224. ## math

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 9. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single,

225. ## physics

Water Flows upward throw the pipe shown in the diagram at 96 L/Min. If the pressure at the lower end is 80kPa, find the velocity of the water is at both ends and the pressure at the upper end. Assume that the density of water remains constant throughout

226. ## math

a box contains more than 25 but less than 40 balls.when we counted by 3 there are 1 left over,when we counted by 5 there are 2 left over.how many balls are there in the box ? please explain how you work it out,thanks

227. ## Math

What is the value of n in the equation (2/3)n =(4/9)

228. ## Trigonometry

1. What is the area of triangle ABC if a = 47.0°, β = 57.8°, and a = 10.2 cm? A. 58.2 cm2 B. 43.5 cm2 C. 38.4 cm2 D. 33.3 cm2 2. Given triangle ABC with β = 41°, g = 14°, and a = 5.0, find the value of c. A. 6.2 B. 4.0 C. 1.5 D. 17 3. Resolve the

229. ## science

if a DNA virus infects a cell, why must it produce RNA?

230. ## Physics [No Math]

When calculating weights away from Earth's surface, for example: At 6.38x10^3 km away from Earth's surface a spacecrafts weight is d=rE+rE Then F=(1/4)(SpaceCraftWeight) Why is the distance 2rE?

231. ## Psychology

What test do I use for a longitudinal study-with a follow-up for every year

232. ## algebra 2

how is 7-3i + 7+3i = 14/1 we're doing sum and product of roots, and i don't get how this is equal to 14

233. ## Algebra

will you please show me step by step in solving: 1/2 log b + 3 log c. I need to express as a single log logarithm and if possible, simplify Thanks

234. ## chemistry

need to convert 5.26g/cm3 to m3

235. ## Chemistry

How many mg of Ca^2+ are in one mEq? What I did was mg = mEq x mol weight / valence mg = 1 x 40.078/ 2 = 20 mg Is this correct?

236. ## English

(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces

237. ## Math

Anticipating a large demand for a toy and Increased inventory 1600 by 25%.Was able to sale 85% of inventory. How much remained

238. ## help

1.Recommend how ambulatory services should be funded. 2.Recommend how continuum of long-term care services should be funded. 3.Recommend how mental and behavioral health services should be funded

239. ## Math

Solve by Factoring: -0.125x^2+1.75x+7=0

240. ## Phusics

Does an object moving in the y direction have KE? If so if you apply a force in the Y direction will the velocity increase?

241. ## Chemistry-Just checking my answer

For each template DNA, I prepared a second PCR reaction that includes "GMO" primers. Assume that all three foods had usable plant DNA. Which template DNA (non-GMO,GMO,test food) would you expect to show successful amplification of the "GMO" target

242. ## Physics

Two resistors of equal resistance are connected in series with each other and are connected to a battery that produces a potential difference of 8 V. If the current is 0.2 A what is the value of each resistance?

243. ## I NEED HELP ASAP

how to prove cos^2A(1+tan^2 A)=1

244. ## math

write a subtraction story using the numbers 63 and 18

245. ## Statics

You wish to test whether or not a coin is fair, so you toss it 400 times and obtain 220 heads. Test the null hypothesis that the coin is fair and balanced against the alternative that it is not fair and balanced. Use the 1% significance level. Be sure to

246. ## Math

Could someone explain how to find which months during the year the maximum/minimum points occur for this problem occurs? I think it's around May and Oct, but I don't get how to determine that on the graph The National Oceanic and Atmospheric Administration

247. ## calculus quick question

g(x)= sqrt(1-4x^2) Can someone help me find the first and second derivatives please!

248. ## Math 8R - HW Qs. Check

Find a real number between (-2)2 and square root of 25 (-2)2 = 4 square root of 25 - 5 a) -3 b) 3.998 c) 4.225 My answer is a. Am I correct.

249. ## Physics

Two resistors of equal resistance are connected in series with each other and are connected to a battery that produces a potential difference of 8 V. If the current is 0.2 A what is the value of each resistance?

250. ## Social Studies

How long were people buried in Pompeii when the volcano erupted?

251. ## English

"Well the two of us can have fun together," I said. Baba smiled. Winked. "Dress warm," he said. It should have been just the two of us--that was the way I wanted it--but by Wednesday night, Baba had managed to invite another two dozed people." (p. 87) This

252. ## geometry

find the volume of a regular pentagonal pyramid whose sides measure 12m and height is 15m.

253. ## Homework Help

A set of 50 data values has a mean of 48 and a variance of 9. I. Find the standard score (z) for a data value = 43. II. Find the probability of a data value < 43.

254. ## math

Suppose that you are taking a course that has three exams which count for three-fifths of your grade and a final which counts for two-fifths of your grade. On your first three tests your scores on were 75, 80, and 74. To get an B in the course, you must

255. ## Math

How can you use multiplication facts for 1 and 2 to find 3x7 ?

256. ## Science

Express mass of the Earth in unit of M. Take ME = 6 x 1024kg. The apparent magnitude of the sun is £¡ 26.81 and that of another star is£¡1.81. How much brighter the sun is with respect to that star ?

257. ## math

what is equivalent to: 5/4: 3/7 ?

258. ## Calculus

set up an integral to find the volume of an equilateral tetrahedron.

259. ## social studies

imagine that you are the leader of a native american group that wishes to join the iroquios league. write an essay giving specific reasons why your group should join the league?? HELP!!

260. ## chemistry

What volume of 1.75M CaSO3 solution could be prepared from 450g of CaSO3?

261. ## LAN network workshop

6. School network LAN A school wants to have their 5 computers labs with Internet connection. Each lab having 21 computers that directly connected to each other and to the Internet. Each lab is aligned vertically at each floor from ground to fifth floor.

262. ## calculus

maximum volume of a cone inside a sphere of radius r

263. ## algebra

it takes Jules 4hrs to paint a house and miranda 6hrs to paint the same house. How long will it take jules and miranda to paint the same house?

264. ## Physics

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

265. ## Science

What is mantenrep?

266. ## Statics

An automotive engineer wants to use 64 test runs to estimate the true mean tire stopping distance. The standard deviation is assumed to be 32 feet. What is the probability that the error of the estimate will be more than 4 feet?

267. ## Statics

For each of the following, state (using symbols) the null and alternative hypotheses. a. Is the mean IQ of a sample of 60 children significantly below the national average of 100? b. Is the proportion of men in the class more than that expected by chance?

268. ## Calculus

How do you solve it?

asked by A company offers the following schedule of charges
269. ## Math

if you worked part of an hour, ex:1.5 hour, how much money would you earn?

270. ## Math

write order pairs for the following scenrios... a). if the neighbor decides to pay with in the first hour wage \$12.. then \$14... then \$16.... then \$18.... and then \$20.... b). you will work for \$12 to retake, it takes you 5 hours to do the job

271. ## Calculus

Equation 1: (d[Y])/dt = k1 - v2[Y]*((ϵ^2+([X]/Kn )^2)/(1+([X]/Kn )^2 )) Equation 2: (d[X])/dt = v2[Y]*((ϵ^2+([X]/Kn )^2)/(1+([X]/Kn )^2 )) - k3[X] Kn=3 and ϵ=0 How do I find the value of [X] when system is at steady state?

272. ## Grade 12 AP calculus

You are using Newton's method to solve x3-5x-2=0. If your first guess is x1=2, what value will you calculate for the next approximation x2?

in which hemisphere do you find both north america and south america

274. ## Math

What would the LCD be between x^2, 4x, and 6? Here is the problem: 1/x^2+3/4x-5/6

275. ## Physics University

If a completely cylindrical bar with a mass of 5000kg is flung into a wall with a surface area of 500un^2 and is morphed into a square at 50NMC/m at 40 degrees tangent to the area of initial impact. What is the length of the sides?

276. ## math

find the inverse of f(x)=-5+log(base5)(y-5)

277. ## chemistry

Calculate values of for the following sparingly soluble solutes. Calculate value of Ksp for AgI (delta Gf(Ag^+)=77.11 kj mol^-1 , delta Gf(I^-) =-51.57 kJ mol^-1, delta Gf(AgI) =-66.19 kJ mol^-1).

278. ## math

in an equilateral triangle ABC,O is any point in the interior of the triangle.From O perpendiculars are drawn to the sides.prove that sum of these perpendiculars is constant for any triangle

279. ## Chemistry Help

Using the accurate concentration that you measured in Part A (which is 14.77 ml), calculate the mass of HCl (in grams) present in a 15.00-mL sample of the acid solution, using proper dimensional analysis

Appreciate if you could help me answering the following questions! thank you!! How would you prepare a 20% homogenate from a 2.0g of liver using 0.25M sucrose? why is it necessary to cool the homogenate during homogenization?

281. ## Math

Which number can be used as a counter example to, "Any number that is divisible by 3 is divisible by 9"? a)9, b)18, c)30, d)40 Can you explain me the answer how do you get it? because I don't understand about counter examples. Thanks

282. ## I need help

how to verify csc(pi/2- θ)/cscθ=tan θ Pi/2 is a fraction then the / sign is meant for dividing

283. ## Intermediate Algebra

The speed of a boat in still water is 29mph. if the boat travels 140mph downstream in the same time that it takes to travel 92miles upstream, find the speed of the stream.

284. ## 123

what is the rule of 7,20,13,16

285. ## Algebra

q+2/5 = 2q-11/7

286. ## Statics

An apple grower is trying to produce larger fruit by using a new fertilizer. The usual fertilizer produces fruit with a mean diameter of 8.7 cm. Two new fertilizer brands are under consideration, with the following experimental results: BRAND A: n = 10,

287. ## Chemistry Help

T=PV/nR P=0.96 V=0.045 n=0.002 g/mol R=0.082057

288. ## math

solve the logarithmic equation. log(5x+7)=1+log(x-9)

289. ## science

how does the retrovirus obtain its envelope?!?

290. ## College Math

(2x-1/x+3)+(x+4/x-6)+(3x-1/x^2-3x-18)

291. ## Basic college Math

option, Truck A, offers a flat fee of \$25 and \$.40 per mile. Truck B offers a flat fee of \$30 and \$.25 per mile.

292. ## College Chemistry

Using the accurate concentration that you measured in Part A (which is 14.77 ml), calculate the mass of HCl (in grams) present in a 15.00-mL sample of the acid solution, using proper dimensional analysis

(2x/x^2-16)+(7/x-4)

294. ## Math

Use 16 blocks to build a house.There are 10 squares and 8 triangles. show work and write number sentence

295. ## chemistry

What volume of 1.75M CaSO3 solution could be prepared from 450g of CaSO3?

296. ## math

find the missing number; 8 1 4 5 7 # ;81 4 25 36 ?

297. ## pre-calc help please !

how do you verify this identity Sin^3βcosβ+cos^3βsinβ=sinβcosβ

298. ## math

8-(1/x)-(6/x^2)

299. ## Intermediate Algebra

solve for q: 1 = 1+ 1 __ __ __ f p q

300. ## matric

Let matrix p= [6 -4] 1 0 If where a and b are real numbers, I is a identity matrix and 0 is a null matrix, find a and b.

301. ## math

find the inverse. f(x)=-2+log_4(x-4)

302. ## College Math

2x-1/4x^2+3(x-2)/4x^2

303. ## College Math

4x-3/6-8x-2/12

304. ## College Math

1/x^2+3/4x-5/6

305. ## College Math

(-2/n-6)-(6/2n+3)

306. ## math

solve the following inequality. (x-3)^2/(x^2-4)is greater than or equal to 0.

307. ## Intermediate Algebra

i^59 and 4 ____ 3+5i