# Questions Asked onMarch 25, 2013

1. ## chem

Consider the titration of 30.0 mL of 0.050 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant have been added. (The Kb for NH3 is 1.8e-05.) (a) 0 mL . (b) 25.0 mL . (c) 59.0 mL . (d) 60.0 mL (e) 63.0 mL (f) 67.5 mL

2. ## precalculus

A ferris wheel is 20 meters in diameter and boarded from a platform that is 3 meters above the ground. The six o'clock position on the ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 10 minutes. The function h =

2. A teacher asks her class of 22 students, “What is your age?” Their responses are shown below. 19, 19, 14, 14, 16, 19, 19, 16, 16, 15, 17, 16, 17, 16, 15, 14, 15, 15, 17, 14, 16, 15 Find the mean, median, and mode for the data. If necessary, round to

4. ## Science

Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol

5. ## Circles / Square

Alicia has a flat platter shaped like a square with a semicircle of diameter 10 inches on each edge. What is the number of inches in the side length of the smallest square that can contain the platter (which contains the square with the semicircles on each

6. ## math

Graph the quadratic functions y = -2x2 and y = -2x2 + 4 on a separate piece of paper. Using those graphs, compare and contrast the shape and position of the graphs. (3 points)

7. ## Maths

Bill and Steve decide to spend the afternoon at an amusement park enjoying their favorite activities, the water slide and the gigantic Ferris wheels. Their tickets are stamped each time they slide or ride. At the end of the afternoon they have the

8. ## probability

in a 2-card hand, what is the probability of holding only face cards?

9. ## Physics

Nora rides a bicycle for 5 min on a curvy road at a constant speeed of 10 m/s . Describe noras ride in terms of position, velocity, and acceleration, compare the distance she rides and her displacement.

10. ## Calculus

The monthly demand function for a product sold by a monopoly is p = 3750 − 1/3x^2 dollars, and the average cost is C = 1000 + 70x + 3x^2 dollars. Production is limited to 1000 units and x is in hundreds of units. (a) Find the quantity that will give

11. ## college physics

A 30.3-kg child starting from rest slides down a water slide with a vertical height of 10.5 m. (Neglect friction.) (a) What is the child's speed halfway down the slide's vertical distance?

12. ## chemistry

how much heat is required to vaporize 343g of liquid ethanol at its boiling point?

13. ## Chemeistry

when 4.50 g of fe2o3 is reduced with excess h2 in a furnace, 2.6 g of iron metal is recovered. What is the percent yield when molar mass of Fe2O3 is 159.7

14. ## Pre-Algebra

Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer: B) two sets of values.

15. ## Maths

Margie is responsible for buying a week's supply of food and medication for the dogs and cats at a local shelter. The food and medication for each dog costs twice as much as those supplies for a cat. She needs to feed 164 cats and 24 dogs. Her budget is

16. ## management

young innovative or high tech firms often adopt the strategy of ignoring history of attempting to do something radically new.in what ways will this strategy help them?in what ways will this strategy hinder them/

17. ## Chemistry

Hi, could someone please take a look at my solution to this problem and let me know if it's correct? I would really appreciate some help. Calculate the theoretical yield for K3[Fe(C2O4)3]*3H2O; 491.258 g/mol Mass of Ferrous Ammonium Sulfate Hexahyrdreate:

18. ## Physics

A truck driver travels 55 km in 1 hour. He then drives a speed of 35km/hr for 2 hrs. Next, he drives 175 km in 3 hrs. What was his average speed? Should i add up the total distance and total time taken then solve?

19. ## Physics

A stopper tied to the end of a string is swung in a horizontal circle. If a mass of the stopper is 13.0 g, and the string is 93.0 cm, and the stopper revolves at a constant speed 10 times in 11.8 secs, what is the tension on the string? I tried solving

20. ## physics

An unknown liquid fills a square container of sides 10 m. What is the density of a material if the pressure 5 m below the surface is 1.6 atm? Assume g=10 m/s^2 and the pressure at the surface of the liquid is 1 atm. Also assume that 1 atm = 10^5 Pa. (Hint:

21. ## chemistry

a 23.74 mL volume of .0981 M NaOH was used to titrate 25 mL of a weak monoprotic acid solution to the stoichiometric point. determine the molar concentration of the weak acid solution. express in correct sig figs.

22. ## Chemistry

Your space ship has docked at a space station above Mars. The temperature inside the space station is a carefully controlled 24oC at a pressure of 689 mm Hg. A balloon with a volume of 426 ml drifts into the airlock where the temperature is -88oC and the

23. ## calculus

The measurement of the radius of a circle is found to be 14 inches, with a possible error of 1/4 inch. Use differentials to approximate the possible error and the percentage error in computing the area of a circle.

24. ## Physics

A girl starts from rest and reaches a walking speed of 1.4 m/s in 3.0 s. She walks at this speed for 6.0 s. Girl then slows down and comes to a stop during a 10.0 -s period. What was her acceleration during each of the 3 time periods? Her acdeleration

25. ## Physics

A 9.6-m-long elastic band is used to launch a toy glider. Once stretched to a length of 38 m, the band releases 1.7 J of elastic potential energy when you let it contract 0.071 m. What forward force is the band exerting on the toy glider?

26. ## math

A 13 foot ladder is leaning against a building.The bottom of the ladder is 5 feet from the building.How high up does the ladder meet the wall?

27. ## Math

Suzanne has a liter of apple juice. How many cups with a capacity of 100 mL can she fill with apple juice?

28. ## Physics

A friend tells u he is 30 m from the fountain in the middle of the city. Explain why u cant identify his position from this description. Is it correct to say : cz theres no direction and i don't know where os the exact position of the fountain

29. ## Math

A carnival Ferris wheel with a radius of 7 m makes one complete revolution every 16s. The bottom of the wheel is 1.5 m above the ground. Find the amplitude, vertical shift, phase shift and k value and period. Do all calculations and then make your final

30. ## math

One batch of fruit salad has equal amounts of which kinds of fruit?Explain how you decided.

31. ## math

A basketball has a diameter of 29.5 inches. If the basketball is fully inflated, about how many cubic inches of air will it hold?

32. ## math word problem

"Adult tickets are \$6, Kids are \$3. If the total sales are \$585, but only 120 tickets were sold, how many adult tickets were sold? If this was 130 it would be easy: \$3+\$6 =\$9; \$585/\$9 = 65 tickets. The problem is the question specifies 120 tickets.

33. ## Pre algebra

Electrical poles that carry electrical wire seem to get smaller the farther away they are. Find the apparent height of each pole if the tallest pole is 50 ft tall and there is 100 ft between each pole.

34. ## Physics

A 9.6-m-long elastic band is used to launch a toy glider. Once stretched to a length of 38 m, the band releases 1.7 J of elastic potential energy when you let it contract 0.071 m. What forward force is the band exerting on the toy glider?

35. ## science

after 30s, a runner is spriting at 3m/s. But, 10s later, the runner is sprinting at 3.8m/s. What is the runner's acceleration during this time?

36. ## Math

What is the approximate circumference of a circle with a radius of 6 centimeters? A.12 B.18 C.24 D.36 My teacher says it's D and I agree but for the next question he says it's 12 and aren't these two questions the same? What is the circumference of the

37. ## Pre-Algebra

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets

38. ## Soc. Studies

Which of the following women wrote a book which inspired many early feminists? A.Betty Friedan B.Gloria Steinem C.Phyllis Shafly D.Jeannette Rankins I think this is A...?

39. ## chemistry

N2(g)+H2(g)-NH3(g) Calculate the volume of ammonia gas produced when20cm3 of nitrogen gas was reacted with an excess of hydrogen gas

40. ## Pre-Algebra

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets

41. ## Statistics

4. The data below are from an independent-measures experiment comparing three different treatment conditions. Treat. 1 Treat 2 Treat 3 0 1 4 0 4 3 G=24 0 1 6 2 1 3 Σ X² = 92 T=2 T=6 T=16 SS=3 SS=9 SS=6 Use an analysis of variance with α of .05 to

42. ## Chemistry

A solution is prepared by dissolving 0.12 mol of acetic acid and 0.12 mol of ammonium chloride in enough water to make 1.0 L of solution. Find the concentration of ammonia in the solution.

43. ## Chemistry

Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is: S2(g)+C(s) CS2(g) Kc=9.40 at 900K How many grams of CS2(g) can be prepared by heating 16.8 moles of S2(g) with excess carbon in a 9.80 L reaction vessel held at 900 K

From an ATP production viewpoint, use fact B to make a statement regarding the efficiency of fats vs. carbs. Fact b - Carbs bind and store water. The metabolism of water yields no ATP. Fat has no water bound to it.

45. ## statistic

Assume that previous fast-food research has shown that 80 percent of the consumers like curly French fries. The researcher wishes to have a standard error 6 percent or less and be 95 percent confident of an estimate to be made about curly French fry

46. ## physics

The figure shows a 0.3 kg baseball just before and just after it collides with a bat. Just before, the ball has velocity of magnitude 11.4 m/s and angle = 31.4 degrees. Just after, it is traveling directly upward with velocity of magnitude 9.00 m/s. The

47. ## physics

A copper rod of length 0.83 m is lying on a frictionless table (see the drawing). Each end of the rod is attached to a fixed wire by an unstretched spring that has a spring constant of k = 73 N/m. A magnetic field with a strength of 0.17 T is oriented

48. ## Chemistry

Tungsten metal can be produced by the reaction of tungsten oxide powder (WO3) with hydrogen gas (H2) in a reactor heated to 800oC. The by-product of the reaction is water vapor (H2O). The reactor is charged with 128.0 kg of WO3 and 41.0 kg of H2. Assume

49. ## chemistry

NaCl(s) + H2O(l) Na(aq) + Cl(aq) If you added chloride ions to the above equilibrium, what would happen to the concentration of the products, and the concentration of the reactants? I know the equilibrium would shift to the left, and I am guessing the

Ella and Nico had \$250 altogether. If Nico spent \$35, he would still have \$5 more than Ella. How much money did Ella have?

51. ## Math

Write an integer that is represented by the following sentence The temperature dropped 17 degrees between noon and midnight.

52. ## statistics

Us travel data center survey of 1500 adults found that 42% of respondents stated that they favor historical sites. Find the 95% confidence interval of the true proportion of all adults who favor visiting historical sites.

53. ## Chemistry

Performing a gravimetric analysis of Ca2+. 25 mL of unknown [Ca2+} added to 25 mL of 0.15 (NH4)2C2O4 and 75 mL of HCl. Urea also added. H2NCONH2 + 3H2O --heat→ CO2 + 2NH4 + 2OH CaC2O4*H2O --> Ca2+ + C2O42- [Ca2+]unknown=0.06028 M

54. ## fundamental of management

young innovative or high tech firms often adopt the strategy of ignoring history of attempting to do something radically new.in what ways will this strategy help them?in what ways will this strategy hinder them/

55. ## math

The Carsons are putting a rectangle swimming pool in their yard. It will measure 20ft by 12ft. They plan to have a cement walkway around the pool which should measure 4 ft wide. What is the area of the walkway?

56. ## spanish

14.pagar dinero cada mes por vivir en un lugar? I have tried many answers will not accept them. It is a form of rent alquilar my book shows el alquiler

57. ## MATHS

in a class of 60 students,the number of students who pass biology is 6 more than the number who pass chemistry.every student passed at least one of the two subject.how many pass in only biology.how many pass in only chemistry.

58. ## math

Anneke's science class measured 10 inches of rainfall during the month of May what was the average rainfall per day?(Round your answer to the nearest hundredth.) Please answer and explain.

59. ## Chemistry

20 ml of 0.1 M acetic acid was mixed with 25 ml of 0.1 M Sodium Acetate. The pH was measured to be 4.43. 5 ml of 0.1 M Sodium Hydroxide was added to the buffer and the pH was measured to be 4.60. Calculate the pH of the buffer before and after the addition

60. ## math

At the beginning of a basketball game, the referee tosses the ball vertically into the air. Its height, h, in feet after t seconds is given by h(t) = -16t2 + 24t +5. During what time interval (to the nearest tenth of a second) is the height of the ball

61. ## Biology

The original high estimate of the number of protein-coding genes in humans was based partly on the number of different known proteins made by the human organism. How can the small number of genes now thought to be present account for this larger number of

62. ## chemistry

provide the appropriate IUPAC name for the following alcohol. designate e or z 8 carbon chain double bonds between 4 and 5 and 6 and 7 methyl group on 6 OH on the second carbon [the only hint i got from this homework is to begin my answer with

63. ## english

Choose an essay or a short story to read. Then answer the following questions in the space provided. 10.What is the title of the story essay? 11.Who wrote it? 12.Whom is the story about? (Identify the main characters [or, if an essay, the subject

64. ## Calculus

The monthly demand function for a product sold by a monopoly is p = 3750 − 1/3x^2 dollars, and the average cost is C = 1000 + 70x + 3x^2 dollars. Production is limited to 1000 units and x is in hundreds of units. (a) Find the quantity that will give

65. ## statistics

Confidence Intervals; In a survey of 1004 individuals, 442 felt that Randolph spent too much time away. Find a 95% confidence interval for the true population proportion

66. ## Trig

How do I use the unit circle to evaluate tan(-3pi/4)

67. ## Maths

Solve for x: log5(x-2)+ log5 (x-4) = log6(x-1)

68. ## Biochemistry

In plants, it can be assumed that NADPH like NADH is energetically equivalent to 2.5 ATP. Calculate the number of ATP and ATP equivalents that are needed to synthesize one molecule 0f glucose-6-phosphate from CO2 and photosynthetically produced ATP and

69. ## CST GEOMETRY

a tree is situated on level ground from a point 135 feet from the base of the tree the measure of the angle of elevation from the ground to the top of the tree is 43 degrees which is the height of the tree to the nearest foot?

70. ## Alg I

Factoring ax^2 + bx + c Find two different values that complete each expression so that the trinomial can be factored into the product of two binomials. Factor your trimonials. 4n^2+ __n - 3 Please explain and solve.

71. ## Physics

A 4 kg crate slides down a ramp.the ramp 2.9 m in length and incline at an angle of 35 degress.the crate start from rest at the top and has a friction force of 3 n.what is the speed of the crate

72. ## organic chemistry

what type of feature will be observd in the ei mass spectrum of chlorobenzene?

73. ## Chemistry

At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) 2HI(g) At this temperature, 0.300 mol of H2 and 0.300 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at equilibrium?

74. ## Biology

Stem height in the pea plant is one of the traits studied by Mendel. The tall allele is dominant to the short stem allele. What is the probability of a tall offspring if two heterozygous plants are mated? What proportion of the tall offspring is likely to

75. ## physics

Light with a frequency of 4.32 × 1015 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 5.8 eV. What is the work function (in eV) of the metal?

76. ## Math

Suppose you had d dollies in your bank account.you spent \$12 but have at least \$51 left.how much money did you have initially?write and solve an inequality that represents this situation.

77. ## Chemistry

If a sample of gas occupies 2.1 ml at a pressure of 896 torr, what volume (ml) will it occupy at a pressure of 316.8 torr. I really need an answer, but also please show me how to work this problem.

78. ## GEOMETRY(CIRCLE)

Three circles with different radii have their centers on a line. The two smaller circles are inside the largest circle, and each circle is tangent to the other two. The radius of the largest circle is 10 meters. Together the area of the two smaller circles

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79. ## College Gen. Math

There are 6 times as many dimes as quarters, and 6 times more nickels than quarters. If you have \$5.70, how much money do you have in quarters?

80. ## Math

An object suspended from a spring is oscillating up and down. The distance from the high point to the low point is 30cm, and the object takes 4s to complete 5cycles. For the first few cycles, the distance feom the mean position, d(t) centimetres, with

81. ## Chemistry

1 g of acid was mixed with 120 ml of distilled water and the solution was filtered into a clean dry beaker. A 25 ml aliquot of this solution was titrated with 0.1120 M NaOH. The pH of the acid was recorded to be 4.42. Calculate the initial concentration of

82. ## GEOmetry!!.....

ABCD is a trapezoid with AB

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83. ## Applied maths-mechanics

A block of mass 300kg is just pulled along rough horizontal ground by two equal force inclined at 30 degrees to the line of motion.if the coefficient of friction is 0.6.find the value of P

84. ## math

find tan 30 degrees and tan 45 degrees using the 45-45-90 triangle therom and 30-60-90 triangle theorm

85. ## Physics

A dockworker loading crates on a ship finds that a 22-kg crate, initially at rest on a horizontal surface, requires a 76-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 59 N is required to keep it moving

86. ## SIMPLE pHYsics....

Two positive point charges are placed on the x-axis. One, of magnitude 4Q, is placed at the origin. The other, of magnitude Q is placed at x=3 m. Neither charge is able to move. Where on the x-axis in meters can I place a third positive point charge such

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87. ## English

Q: What is the difference between 'playing field' and 'playground' in meaning?

88. ## chemistry

Aluminum fluoride, AlF3, exists as a gas at 1000 degrees C. (a) The Al-F bond energy is observed to be 659 kJ/mole. Calculate the Al-Al bond energy if the F-F bond energy 154.8 kJ/mol. Calculate the % ionic character of the Al-F bond.

89. ## Physics

A box weighing 8.0 kg has to be moved from the floor to the back of the truck, using a ramp 2.5 m long inclined at 30°. The worker gives the box a push so that it has initial velocity of 5.0 m/s. Unfortunately, the friction is more than he estimated and

90. ## chemistry

For the reaction CO2 + H2 CO + H20 + heat, indicate how the change in condition will shift the equilibrium (ie right or left) a. Removal of CO2 b. Addition of H2 molecules c. Increase volume of reaction vessel d. Addition of catalyst e. Refrigerate

91. ## Physics

A wire has a length of 5.40 10-2 m and is used to make a circular coil of one turn. There is a current of 2.30 A in the wire. In the presence of a 3.80-T magnetic field, what is the maximum torque that this coil can experience?

92. ## Organic Chemistry

please homework help A bowl of 582 g of water is placed in a microwave oven that puts out 729 watts (J/s). How long would it take in seconds to increase the temperature of the water from 12.0oC to 46.6oC?

93. ## History

Find at least 5 Mexican War battles that took place in Southern California. (Southern California = the ten southern counties.)

94. ## math

How many balls of clay and straws are needed to make a hexagonal pyramid?

95. ## physics practical investigation

Plan,design and conduct an investion to find out whether the amount of heat produced will depend on increase on concentration of Hcl when Hcl reacts with an excess zn.you may investigate either the amount of heat produced or the amount of gas produced(make

96. ## phy

A very thin hollow conducting sphere has a radius of R=0.12 m. The center of the sphere is at S. A charge of q=7×10−6 C is present at point P which is located d=0.09 m from S. Assume that this charge stays at this position (thus it cannot move). We draw

97. ## math

AB=36cm and M ismid point ofAB semicircles are drawn inAB,AMandMBas diameter.a circlewith centreO touches all three semi circle find radius?

98. ## precal

The values of x that are solutions to the equation cos^(2)x=sin2x in the interval [0, pi] are a. arctan(1/2) only b. arctan(1/2) and pi c. arctan(1/2) and 0 d. arctan(1/2) and (pi/2) e. arctan(1/2), o, and (pi/2)

99. ## Lit

what is the style of the book tuesday siesta? thanks!

100. ## English

1. The students are playing soccer against the teachers. (What is the part of speech of 'against the teachers'? Is it an adverbial phrase or an adjective phrase? Does 'against the teachers' modify 'soccer'?) 2. What's your favorite place at school? - It's

I have to write a research paper on MBWA (Management by walking around) but I honestly can't think of any good thesis's, or topics to write about. Any ideas?

102. ## math

I need help soving this problem. Factor the trinomial completely. 4x^3-10x^2-50x I also want to know if I soved this problem correctly? Factor the trinomial 9s^2+3s-20 my answer is (3s-4)(3s+5)

103. ## Math106

A couple deposits 459 per month paying 6% compounded monthly how much would be in the account in 5 years

what is the utiliterian theory

"...incorporation is no longer the special privilege it once was". Discuss this statement. Does it have any impact on businesses (those not incorporated).

106. ## Chemistry

A 3.0 L volume of methane gas is cooled from 59.4°C to 30.0°C. If the pressure remains constant, what is the final volume (L)?

107. ## chemistry quick question

I need help with something and can't find this anywhere online. my structure looks like this OH CH2 CH3CH2CH2CHCHCH2CH3 CH3 So that OH looks like it is on a ethyl group. I need to write the IUPAC name and I wrote 3-methyl-4-heptanol but realized my mistake

108. ## Social Studies

Christianity claims many holy sites close to what specific body of water Sea of Galilee What two sites are holy to all three religions of Jews Muslims and Christians? Jerusalem and Haifa

109. ## statistics

The average amount spent at a fast-food restaurant in California was \$3.30, with a standard deviation of \$.40. Yet in Georgia, the average amount spent at a fast-food restaurant was \$3.25, with a standard deviation of \$.10. What do these statistics tell

In Ralph Waldo Emerson's "Nature", how does he show his idealism in the essay? I don't understand what the question's asking...what's idealism?? thank you!!!

111. ## physics practical investigation

Plan,design and conduct an investion to find out whether the amount of heat produced will depend on increase on concentration of Hcl when Hcl reacts with an excess zn.

112. ## geography

hurricanes and cyclones originate: a.in the tropics b.in temperate latitudes c.near the poles d.in the center of large land masses Is the answer a?

113. ## math

At the Statistics Canada Web site, you can find the percent of adults in each province or territory who have at least a university certificate, diploma, or degree at bachelor's level or above. It makes no sense to find x bar for these data and use it to

114. ## history

Which of the following is true of the Spanish-American War? A. The black soldiers who fought had gained experience and distinction during the Indian Wars. B. Racial tensions were suspended for the duration of the war. C. About one in ten American soldiers

115. ## english

course journal penn foster

116. ## psychology

It's for a psychology experiment, i'm comparing the reaction times of people to the number of hours of sleep they get per night on average. Please give me some ideas on how to carry out this experiment. For example, like what will be a good way to select

117. ## Maths Probability

When writing a math expression, any time there is an open bracket "(", it is eventually followed by a closed bracket ")". When we have a complicated expression, there may be several brackets nested amongst each other, such as in the expression

118. ## Science

Please help me with matching the stages of the meiosis to its proper description. Sentences: 1. Members of each homologous pair separate from each other (chromatids) still remain together). 2. Homologous chromosomes pair up with each other and chromosomes

Anneke's science class measured 10 inches of rainfall during the month of May what was the average rainfall per day?(Round your answer to the nearest hundredth.) Please answer and explain.

120. ## German

Decide if the following sentence is grammatically CORRECT or INCORRECT. Wann darf er wieder aufstehen?

121. ## Science

Are the following examples physical changes or chemical changes. Mixing yeast and sugar Dissolving sugar in water Slicing bread Baking bread Melting cheese

122. ## science

During condensation, what must be changed, temperature or heat energy?

123. ## chemistry

In Flask A, you reacted 5.10 g Mg with 0.447 mol HCl. In Flask B, you reacted 24.21 g Mg with 0.998 mol HCl. Which ballon will inflate the most?

124. ## geometry

A. Derive the distance formula (d) shown below for points A = (x1, y1) and B = (x2, y2). 2 2 1 2 2 1 d = (x − x ) + ( y − y ) Note: Look for an application of the Pythagorean theorem where the red line, segment AB, is the hypotenuse of a right

125. ## Marketing

Assume that previous fast-food research has shown that 80 percent of the consumers like curly French fries. The researcher wishes to have a standard error 6 percent or less and be 95 percent confident of an estimate to be made about curly French fry

126. ## Physics

The coil in the figure below contains 425 turns and has an area per turn of 3.00 10-3 m2. The magnetic field is 0.21 T, and the current in the coil is 0.27 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The

127. ## physics practical investigation

design and conduct an investion to find out whether the amount of heat(gas) produced will depend on an increase on the concentration of Hcl when Hcl reacts with an excess zn..guidance/hint...you may investigate either the amount of heat produced or the

128. ## Economics

I need to write an essay titled " How are we all economists?" and I was wondering if you guys could give me some ideas on how to start it. Bulletpoints would be the most helpful.

129. ## physics angular velocity

A 20g steel weight is placed on the edge of 1 30cm diameter plastic disk. The coefficient of static friction between the steel weight and plastic disk is 0.4. At what angular velocity will the weight slide off the disk?

130. ## Quantum Physics

Let f:{0,1}->{0,1} with f(101)=1 and f(x)=0 for x ≠ 101 . In this question, we will run through two iterations of the algorithm. (a) What is the superposition after the initialization step? Note that you can describe the superposition Σαx|x> by

131. ## College algebra

Form a polynomial f(x) with real coefficents having the given degree and zeros degree 5; zeros: 5; -i; -9 +i f(x)=a

132. ## Physics

A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field

133. ## Social Studies

What religion claims Jaffa as a holy city Muslim How many sites along the Jordan river do Christians consider holy? 1

134. ## Chemistry

What is the bond order of BN-

135. ## Math

Josh wants to get an average bowling score of 135. He will bowl 4 games. How many total points will he need for all 4 games?

136. ## physics practical investigation

design and conduct an investion to find out whether the amount of heat(gas) produced will depend on an increase on the concentration of Hcl when Hcl reacts with an excess zn..guidance/hint...you may investigate either the amount of heat produced or the

137. ## physics practical investigation

design and conduct an investion to find out whether the amount of heat(gas) produced will depend on an increase on the concentration of Hcl when Hcl reacts with an excess zn.hint...you may investigate either the amount of heat produced or the amount of gas

138. ## math

I need help with graphing a quadratic function . . . y = -2x^2 Please don't just give me the answer help me through it. . .

139. ## Maths

Suppose that a boat moves in a straight line with speed v through water with resistance proportional to the square of its speed v with initial speed v0 and initial position x0. Find its speed v(t) and position x(t) and conclude that the boat travels an

140. ## PHYsics......

A race car is on a straight track. The race car accelerates from rest, covering 100 m in 5 seconds. What is the acceleration of the race car in m/s^2?

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141. ## geometry

can someone please show me the answer for this problem ? a tree is situated on level ground from a point 135 feet from the base of the tree the measure of the angle of elevation from the ground to the top of the tree is 43 degrees which is the height of

142. ## Social Studies

What religion claims areas around the Capital of Israel, Tel Aviv, as holy? Is it the Christian religion? What religion claims area along the Kishon River as holy? Jewish?

143. ## University, Physics

Derive the error in equation: T1/2 = 1n(2)/lambda solve for T

144. ## math

how do I calculate the volume of a liquid in a graduated cylinder if the radius is 3 cm, and the height is 38

145. ## Trigonometry

Every point (x,y) on the curve y=log(3x)/log2 is transferred to a new point by the following translation (x′,y′)=(x−m,y−n), where m and n are integers. The set of (x′,y′) form the curve y=log(12x−96)/log2. What is the value of m+n? Details

146. ## Chemistry

A small cylinder of compressed gas has a volume of 396.6 ml and contains 47.9 g of CO2 at 25°C. What is the pressure (atm) inside the cylinder?

147. ## Physics

A wire has a length of 5.40 10-2 m and is used to make a circular coil of one turn. There is a current of 2.30 A in the wire. In the presence of a 3.80-T magnetic field, what is the maximum torque that this coil can experience?

148. ## algebra

a chemist has 12% hydrochloric acid+24% hydrochloric. How many of each should be 16 liters of 21%hydrochloric?

149. ## algebra

What is 80 is 20 times as many as 5 equal in a number sentence?

150. ## zoology

4. In applying cladistic analysis to construct a phylogeny of the animal kingdom, why would the presence of flagella be a poor choice of a characteristic for the grouping the phyla into clades?

151. ## Math

What are five numbers that have a median of 71,300

152. ## physics

A car drives along a road section free of curves with speed v0 first through the hollow of a valley (radius of curvature r1) and then over a mountain top (radius of curvature r2). Let the driver have mass m. • What changes in his weight does the driver

153. ## Chemistry

Solid mercury breaks down when heated forming the elements mercury and oxygen. write an equation for this reaction

154. ## Calculus

Is the series 1/(n(n+1)) convergent? n=2 to n=infinity

155. ## Pre-calculus.

Wesley and Delia are playing a math game. Wesley gives Delia these step to follow. Step 1: Multiply a number by 6 and then subtract by 4. Step 2: Divide the result by 2 Step 3: Add 3 to the result from the second step. If Delia's final answer is 19, What

156. ## physics....need help!

An 80 kg man is riding in an elevator from the first floor to the 34th floor. The elevator and man are moving at a constant speed. What is the net force on the man in Newtons.

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157. ## aig math

When 306 stamps were shared among Pat, Kyle, and Ryan, Pat got twice as many stamps as what Kyle and Ryan got together. If Kyle got 18 stamps more than Ryan, how many stamps did Ryan get? Don't forget to show your work.

158. ## Physics

An á-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.16 106 V and then enters a uniform magnetic field whose magnitude is 3.00 T. The á-particle moves

159. ## Algebra 2

Simplify (2.3)^5 log base 2.3^1

160. ## Physics

A positively charged particle of mass 5.60 10-8 kg is traveling due east with a speed of 60 m/s and enters a 0.49-T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 1.20 10-3 s, at which time it leaves the field

161. ## chemistry

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?

162. ## chemistry

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?

163. ## Social Studies

What two bodies of water does the Jordan River connect Dead sea and Sea of Galilee

164. ## Chemistry

A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining electron. The voltage between the electrodes of the gas discharge tube is increased from zero. Electrons are accelerated across the

165. ## math

a spherical hailstone is losing mass by melting uniformly over its surface as it falls. At a certain time, its radius is 2 cm and its volume is decreasing at the rate of o.1 cm^3/s. How fast is the radius decreasing at the time?

166. ## life oriantatiom

identify and describe 3 environmental health hazards that causes ill health, crises and or disaster within our community or any other community within SA and globally.

167. ## science

For a given area of land, the average rate of creep is 14 mm per year. How long will it take the area to move 1 m?

168. ## physics practical investigation

design and conduct an investion to find out whether the amount of heat produced will depend on increase on concentration of Hcl when Hcl reacts with an excess zn.hint...you may investigate either the amount of heat produced or the amount of gas

169. ## physics

a weightless plank of unknown length has one concrete block at the left end,another at the center, two at the right end.if its center of gravity is 2.5m,what is the length of the plank?

170. ## math

the new playground at middeldae school will be enclosed by a fence. The playgroundnd will be rectangualar and will have an area of 225 yd. The number of yards on each side will be a whole number. What is the least amount of fencing that could be required

171. ## psychology

It's for a psychology experiment, i'm comparing the reaction times of people to the number of hours of sleep they get per night on average. Please give me some ideas on how to carry out this experiment. For example, like what will be a good way to select

172. ## Research report question

What are the three main parts of a research report? title, body, conclusion introduction, body, sources introduction, body, conclusion introduction, evidence, conclusion

173. ## writing

Sentence 1: I am writing in reply to your advertisement in the Elkhart Sun for a sails representative. Which correction should be made to sentence 1? 1. Replace to with too 2. Replace sails with sales 3. Insert a comma after advertisement 4. Insert a comma

174. ## history

After the election of 1890, organized groups supporting farmers called for the formation of a third party that became generally known as the _______ Party. A. Populist B. Ocala C. American D. Socialist i think its a

175. ## history

As its intellectual voice, ______ became the leader of the Harlem Renaissance. A. Claude McKay B. W. E. B. Du Bois C. H. L. Mencken D. James Weldon Johnson i think its b.

176. ## Math

I am a number with a multiple of 10, largest digit is in the tens place, and sum of the digits is 3.

177. ## us history

How much did Coney Island pay to have the escalator?

178. ## math

a rectangle has a base of 25 in. and a height of 15 in. if the shape is dilated with a scale factor of .6, what is the area of the new shape?

179. ## physics

A person weights 685 N in air but only 497 N when standing in water up to the hips. Find (a) the volume of each of the person’s legs and (b) the mass of each leg, assuming they have a density that is 1.05 times the density of water.

180. ## Science

1. To a scientist, a river is a kind of stream. True or False. 2. All streams carry sediment. T/F. 3. A delta keeps growing. T/F. 4. Heavy rain always cause flooding. T/F. 5. A river bank is at the end of a river. T/F.

181. ## calculus

If f(3) =4 g(3)=2 f'(3)=6 and g'(3)=5 find the following number (f+g)' (3)

182. ## account

For both cases, show what each firm would report in its annual statement of profit and loss and other comprehensive income under the: a)Cash Basis b)Accrual Basis CASE 1 During 2012 Gangnam Marketing earned revenues of \$500,000 on account. Gangnam

183. ## Chemistry

A sample of gas has a volume of 8.1 liters at 1 atmosphere pressure and 203.0 K. What is its volume (liters) at STP?

184. ## absolute minimum math

x^2/x-3 on the interval from 3 until infinity. How would you do absolute minimum on this?

185. ## physics practical investigation

Plan,design and conduct an investion to find out whether the amount of heat(gas) produced will depend on an increase on the concentration of Hcl when Hcl reacts with an excess zn..guidance/hint...you may investigate either the amount of heat produced or

186. ## Proctology

Hi, I am an 11th grade student beginning to look into some college options. I am interested in pursuing a career in proctology and have been reading some preliminary books on the topic. Can anyone recommend a college or pre-med program that would offer a

187. ## chem

What does this species represent a transition state for? CH2CH3IH20+---C---Br-/\H Hreaction of 1-propanol with HBr.reaction of 1-bromopropane with OH-.addition of HOBr to 1-propene.addition of HBr to propene with peroxides.

188. ## math

How can you order 3 fractions by using a number line?

189. ## Math

MIKA HAS PARTS OF TWO PIZZAS LEFT FROM HER PARTY. IF THE LEFTOVER SLICES OF PIZZA ARE COMBINED, WHAT FRACTION OF PIZZA IS LEFT?

190. ## organic chem

I prepared triphenylmethanol by a grignard reaction. At the end you add petroleum ether to the mixture and heat it up. It stayed a liquid and got dark and oily but never solidified. What went wrong?

191. ## Law

where can I find information on Issues in Supervision and Consultation?

192. ## math

graph the absolute value function and state its domain and range y=|x-1|+2

193. ## Science

What is Earth's surface (sea level)? Its pressure is 14.7 psi. That is what is the number of ft.

194. ## chemistry

how can I find the Liters of solution. the solution is salt (NaCl) mixed in water (H20) ?

195. ## english

Below is a list of phrases giving reasons to support a topic sentence.Use the list to complete the following unfinished paragraph. Type the body of the paragraph in the text box below. Reasons *Excellent news coverage: sports events; club news;

196. ## home work

The ball is throw in to the air . If its height in feet is given by - 16t^2 + 64t, at what time t will the ball reach a height of 64 feet?

197. ## maths

Amanda is organizing a dinner party for a group of friends. He has prepared 45 chicken dumplings and 75 shrimp wantons. He manages to split the chicken dumplings and shrimp wantons evenly amongst everyone, so that everyone got the same number of chicken

198. ## history

During the election of 1936, declaring their party a "millionaire's union," Franklin Roosevelt focused mainly on defeating the A. Union Party running William Lemke. B. Liberty League running Father Coughlin. C. Union Party running Gerald K. Smith. D.

199. ## Chemistry

A sample of gas with a volume of 14.9 liters at 2.6 atmospheres pressure and a temperature of 25°C is allowed to expand to a volume of 29.3 liters at a temperature of 15°C. What is the final pressure (atm)atof the gas?

200. ## math

A counter in Eills' kitchen is 1 meter wide 2 meter long. Eills wants to replace the counter with a granite counter top .Howmany sqare meters of granite will he need.

201. ## college algebra

I'm stuck on 2 problems I know the answers but need to learn to show the work. X^4+x^3=16-8x-6x^2. Answer: -2,1,+-√8 3x^3+4x^2+6=x. (-2,1/3, i√8/3) Please help so I know how to figure these equations out.A big THANKS

202. ## Chemistry

Calculate the volume of 0.3MHCL used to neutralise NaOH solution

203. ## organic chemistry

Did a grignard experiment where we were supposed to form triphenylmethanol but something went wrong. When we heated up the mixture with the petroleum ether, it didn't solidify, it turned dark and oily. What went wrong?

204. ## Calculus II

Is the series 1/(n(n+1)) convergent? n=2 to n=infinity

205. ## statistics

Consider the probability that less than 13 out of 151 CDs will be defective. Assume the probability that a given CD will be defective is 12%

core business activities of absa at the top of jse csr index

207. ## Little help with math?

48.03 / 7 = What? I don't get this You must put it to repeat

208. ## ALGEBRA 2...

1. Simplify 2.3^5 log base 2.3^1 2. How do you solve this matrix using a graphing calculator AX=B A=9 -3 1 B=-7 X= x 1 1 1 -3 y 16 4 1 21 z 3. How many 4-digits numbers have the thousands digit equal to 2 and the units digit equal to 7? 4. If p and q are

209. ## calculus

Find an equation of the tangent line to the curve at the given point. y^2=x^3 (2-x) (1,1)

210. ## Calculus

F(x) log_3 (1-5x) F'(x)=

211. ## aig math

The ratio of Tim's marbles to Joe's marbles to Matt's marbles is 8 : 6 : 9. If Tim and Joe have 84 marbles altogether, how many marbles does Matt have? Show your work please?

evan drove into the country for a long weekend. he planned to drive 118 miles on each of 4 days, however his car broke down and he was only able to drive 43 miles on the first day. how many miles per day must he drive to reach his destination.

213. ## Physics

What are two types of waves

214. ## chemistry

An unknown weak acid with a concentration of 0.32 M was found to have a pH of 2.7. Using the table of dissociation constants (Ka) below, determine what the likely identity of the acid is

215. ## language arts Ms. Sue please

1. Read these two short sentences: There was a blizzard. Nearly 20,000 homes in the metro area lost power. Choose the correct subordinating conjunction to combine them into this sentence: _____ the blizzard, nearly 20,000 homes in the metro area lost

216. ## probability

6 male students and 3 female students sit around a round table. What is the probability that no 2 female students sit beside each other?

217. ## math(Ms.Sue)

The ratio of Tim's marbles to Joe's marbles to Matt's marbles is 8 : 6 : 9. If Tim and Joe have 84 marbles altogether, how many marbles does Matt have? Show your work please?

218. ## Physics

Motion is a change in an objects POSITION A change in that (position) over time is?

219. ## physics practical investigation

design and conduct an investion to find out whether the amount of heat produced will depend on increase on concentration of Hcl when Hcl reacts with an excess zn.hint...you may investigate either the amount of heat produced or the amount of gas

220. ## Gen. Chem

Could you help me with this homework please.. 105.0 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 17.1oC. After 288.2 g of an unknown compound at 77.0oC is added, the equilibrium T is 25.1oC. What is

221. ## physics

a weightless plank of unknown length has one concrete block at the left end,another at the center, two at the right end.if its center of gravity is 2.5m,what is the length of the plank?

222. ## Algebra

Need help finding composition of functions. I am doing something wrong continue to get wrong answer f(x)=x+6/x+5, g(x) = 2x-7. Find (fog)(x)

223. ## English

1. Kate is listening to music with headsets on a smart phone. 2. Kate is listening to music with headphones connected to a smart phone. 3. Kate is listening to music wearing headphone attached to a smart phone. (Are the sentences grammatical? Would you

224. ## History

Who was the best president

225. ## Physics/math

Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of

226. ## Physics/math

Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of

227. ## tfryu

a triangle has a base of 18in. , sides of 14in. and 16in. with a height of 4in. What is the area?

228. ## Math

What is greater -19 or -17?

229. ## physics

A 0.7 kg object is at rest. A 6.5 N force to the right acts on the object during a time interval of 3.7 seconds. What is the velocity of the object at the end of this interval?

A sample of 50 people in Harrisburg indicates that 10 people of them know the name of the mayor of their neighboring city. Out of 5, 500 Harrisburgh residents, how many would you expect to know the name of the mayor of the neighboring city?

231. ## english

can you help me find facts and figures why teens should voulunteer if possible how many teens like volunteering i apreciate your help.

232. ## statistics

Are Chicken based dishes more populat than Pizza to a level which is statistically significant at the 95% confidence level? What figures do i have to look at to work it out? Thanks

233. ## science

What caused by matter that has an electric charge?

234. ## government

I am doing a research paper on senator Debbie Stabenow and I cant find some information. What are her years of experience, committee membership and party duties? also how is she viewed by different special interst groups? thanks!

235. ## Calculus II

Does 3/(2^(n) +1) diverge or converge in an infinite sum?

236. ## chem

What does this species represent a transition state for? CH2CH3IH20+---C---Br-/\H H

237. ## chem

What does this species represent a transition state for? CH2CH3IH20+---C---Br-/\H H

238. ## research report question

What are the three main parts of a research report? title, body, conclusion introduction, body, sources introduction, body, conclusion introduction, evidence, conclusion

239. ## Science

All forms of energy can do work. A.true B.false I think this is true..?

240. ## Math

How do I figure out the problem below? (4-1)x ____ = 3x7 ??

241. ## bioloy

Which fraction of the genome contains the most information? Explain.

242. ## simple MATHS!!!

What is the x-intercept of the line y=2x−38?

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243. ## algebra!...

f(x) is a polynomial with degree equal to 5, and one of its roots equal to 15. Let g(x)=f(x)+25. What is the remainder when g(x) is divided by x−15?

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244. ## ihstory

During the election of 1936, declaring their party a "millionaire's union," Franklin Roosevelt focused mainly on defeating the A. Union Party running William Lemke. B. Liberty League running Father Coughlin. C. Union Party running Gerald K. Smith. D.

In the original design for the livingroom genivie ve planned to have a 6ft by 8ft floor rug made after looking at the budget however she discovers she only had enough money to make a .75 times the size of the original how much fringe must she purchase to

246. ## Chemistry

A balloon from the local toy store has a volume of 6.6 liters and an internal pressure of 2.4 atmospheres at 22°C. How many moles of gas does it contain?

247. ## math

you go up a hill at 10 miles per hour and down the hill at 30 miles per hour what is the average speed and it's not 20 miles per hour

248. ## social studies

What is the total capacitance of capacitors connected in series, C1=444F, C2=621F

249. ## math

What's 3 out of 4 of the apples are green.how many apples are green

250. ## English

Sorry....Some errors happened...so the same question was uploaded...

251. ## Math

The basketball team has won 21 games and lost 15 games . How many future games can they lose and keep their winning percentage above 0.500?

252. ## math

different was to make this equation true. 24 x 18=

253. ## math

evaluate each expression for n=3 and n=8

254. ## social studies

What did Davy Crockett want for the United States?

255. ## Chemistry

How many grams of silver will be produced on the reaction of 50.00g iron metal with an excess of a copper (ii) sulfate solution ?

256. ## Social Studies

What two cities in the area known as the west bank do Jews and Muslims both consider holy?

257. ## math

what are monthly payments on \$100,000.00 at 1% over 5 years

258. ## math

Alyssa bought a 7kg bag of grapes she ate 650g of them how may grams of grapes did she have left

259. ## first derivative

What is the first derivative of ln (x^2 + 2)?

260. ## Math

Dylan says that when comparing numbers the number closest to zero on a number line is always the smallest. Is he correct?

261. ## english

Below is a list of facts and statistics that can be used to support a topic sentence. Use the list to complete the following unfinished paragraph given below. It already has a topic sentence. Facts and Statistics: 980,299 registered purebred dogs; does not

262. ## Chemistry

If a gas has a pressure of 3.0 atm at 12.8°C, what is its pressure (atm) at 25.9°C?

263. ## Math

Which sentence will give the best estimate

264. ## math

a counter kitchen is 1 meter wide 2 meter long. Eills wants to replace the counter with a granite counter top .Howmany sqare meters of granite will he need.

265. ## math

ln x^4 + ln X = 24 ln e. Find the value of x. ln x^5=24 x^5=e^24....next i don't know how to solve it. someone plz show me the calculation steps.

266. ## English

1. Traveling in India can be exciting because it has a rich history. 2. Traveling in India can be exciting because it has a rich culture. (Are both grammatical?)

267. ## math

How can you order 3 fractions by using a number line?

268. ## Solve the inequality...

Solve the inequality x^2(9+x)(x-9)/(x+7)(x-5) is greater than or equal to 0?

269. ## Product of Roots of Sums of Products of Difference

What is the product of all roots to the equation ++(x−1)(x−2)(x−3)+(x−2)(x−3)(x−4)(x−3)(x−4)(x−5)+(x−4)(x−5)(x−6)(x−5)(x−6)(x−7)+(x−6)(x−7)(x−8)=0?

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270. ## GEOMetry(TRIANGLE)

ABC is an isosceles triangle where AB=AC and BC=60. D is a point on BC such that the perpendicular distance from D to AB and AC is 16 and 32, respectively. What is the length of AB?

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271. ## Physics

A 3.6 kg ball strikes a wall with a velocity of 9.3 m/s. The ball bounces off with a velocity of 7.9 m/s in the opposite direction. If the ball is in contact with the wall for 0.4 seconds, what is the constant force exerted on the ball by the wall?

272. ## math

Why do we write radian measures with a π rather than just give the decimal equivalent? (for example, why not use 1.88 rad instead of 3π/5 rad?) Thx

273. ## ap calculas

derivative of (-x^3+3)(3x+2)^3

274. ## math

simplify: -2x + (9x - 4)

275. ## Science help

Which of the following technologies is a result of space research and development? A.improved pacemakers B. equipment to allow police to change traffic signals C. cochlear implants to help deaf people hear D. all of the above

276. ## Applied Calc

What is the marginal average cost function?