# Questions Asked onJanuary 31, 2011

1. ## Chemistry

For this picnic, you need to feed at least 300 people. If you want to feed everyone, but still have equal numbers of buns and hot dogs, what is the minimum number of packages of buns and hot dogs you need, respectively? hot dogs= 10, buns=8

2. ## 3rd grade math hw help!

hello all, my daughter come home with a math homework "Alphabet Polygons" I have no idea how to use the letters in the alphabet to answer the questions. Please HELP! The questions are as follow: 1) You can make polygons of some of the letters by drawing

3. ## Geography

How does Western Europe's physical geography affect its settlement patterns, economy, and culture? I've looked in the lesson and on google. But all of the websites that look like they might help are blocked. Can someone help, please? I don't need the

4. ## Basic Math

Bill and Sue both work at night. Bill has every sixth night off and Sue has every eighth night off. If they are both off tonight, how many nights will it be before they are both off again?

5. ## chemistry/math

Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 °C. What would the pressure be if the

6. ## math

find the volume of the rectangular prism: base area 56 in2, height 6 inches

7. ## Electr. and Magnetism

1) A charge of 80nC is uniformly distributed along the x-axis from x= 0 to x= 2.0m. Determine the magnitude of the electric field at a point on the x-axis with x=8.0m. a] 30 N/C b] 15 N/C c] 48 N/C d] 90 N/C e] 60 N/C 2) 3 point charges, 2 positive and one

8. ## physics

two campers dock a canoe. one camper steps onto the dock. this camper has a mass of 80 kg and moves forward at 4 m/s. with what speed and direction do the canoe and the other move if their combined mass is 110 kg?

9. ## Physics

A dockworker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 13.0 m in a time 4.50 s. What is the mass of the block of ice?If

10. ## physics

a compact car has mass 725 kg and is moving at 100 km/h. a) find its momentum b) at what velocity is the momentum of a larger car, mass 2175 kg., equal to that of the smaller car?

11. ## algebra

you will be making hanging flower baskets. the plants you have picked out are blooming annuals and non-blooming annuals. the blooming annuals cost \$3.20 each and the non-blooming annuals cost \$1.50 each. you bought a total of 24 plants for \$49.60. write a

12. ## science

a)why do chemist prefer to read/ record the absorbance, rather that the percent transmittance, of light when analyzing a sample having a visible color? b) three parameters affect the absorbance of a sample. Which one is the focus of this experiment?

13. ## physics

a .50 kg ball traveling at 6.0 m/s collides head on with a 1.0 kg ball moving in the opposite direction at a velocity of -12.0 m/s. The .50 kg ball moves away at -14 m/s after the collision. Find the velocity of the second ball.

14. ## math

A man is 6ft tall is standing 10 feet from the base of a lamp post. The mans shadow has a lenght of 4ft . How tal is he lamp post

15. ## Algebra

three apples and four bananas cost \$4.85,three apples and ten bananas cost \$8.75, find the cost of an apple

What factors account for the resurgence of interest in Operation and Supply Chain Management (OSCM) today?

These are all factors of production: natural resources, human resource and, capital resources, I have to give five examples of each that go into the production of an automobile. Is there any sites that could help me with this? I really don't get it

18. ## physics

The three ropes are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown: F=85 N, q=54°. What is the magnitude of the tension force in the first rope

19. ## psychology- the mind at work

11. By comparison with the Stanford-Binet IQ measure, an advantage of the Wechsler Scales is that they A. have never been associated with the concept of mental age. B. accentuate the importance of reasoning over performance. C. provide an advantage to

20. ## Physics

Mars has a radius of about 0.53 Earth radius and a mass of only 0.11 Earth mass. Estimate the acceleration due to gravity on Mars.

21. ## Physics

A dockworker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 13.0 m in a time 4.50 s. What is the mass of the block of ice?If

22. ## Physics

The moon is 384,000 km from the earth and makes 1 revolution in 27.3 days. Find its angular and linear speeds in its orbit.

23. ## Chemistry

When solid CO2 (dry ice) is allowed to come to equilibrium in a closed constant volume container at room temperature (300K), 1. the pressure rises until it reaches 1 atm 2. the pressure rises until a liquid-gas equilibrium is reached. 3. the pressure does

24. ## chemistry help

the rate constant (k) for a reaction was measured as a function of temperature. A plot of In k versus 1/T (in K ) is linear and has a slope of -1.01 x 10^4 K. Calculate the activation energy for the reaction. i don't know how to solve it???

25. ## math

a basket of fruit has 3 apples, 2 pears, and 4 bananas. what fraction of the fruit are bananas?

26. ## Math

Is the price of a piece of cloth a function of the length of the cloth? Explain

27. ## physics

A journey consists of two displacements: the first is 500m in a northerly direction and the second is 200m in an easterly direction. In a space below draw, to scale, a vector diagram of these displacements. State the scale of your diagram. On your diagram,

28. ## math

The sum of 4 consecutive odd integers is -104. Find the integers with x for unknown numbers.

29. ## calculus - applied problems

Max area - A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a Norman window of maximum area if the total perimeter is 16 feet. - - - - - --------- ! ! ^ !! y ---------

30. ## chemistry

A 0.100 mol sample of H2S is placed in a 10.0 L reaction vessel and heated to 1132°C. At equilibrium, 0.0285 mol H2 is present. Calculate the value of Kc for the reaction below at 1132°C. 2 H2S(g) 2 H2(g) + S2(g)

31. ## Physics

A 600-kg geosynchronous satellite has an orbital radious of 6.6 Earth radii. What gravitational force does Earth exert on the satellite?

32. ## SPANISH HELP!!

In this writing assessment, you are going to use vocabulary from this section to talk about your house. Answer the questions you see based on what you do with this item or where this item might be in your house. Be sure to write in complete sentences in

33. ## physics

a .105 kg hockey puck moving at 48 m/s is caught by a 75 kg goalie at rest. With what speed does the slide on the ice?

34. ## finance

Richard likes the car price of \$10,000 but financing through the dealer is no bargain.He has \$2,000 for a down payment,so he needs \$8,000 for the loan.Richard borrows \$8000 for a period of four years at an add on intrest rate of 11 %.What is the total

35. ## calculus - applied problems

Max area - A Norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a Norman window of maximum area if the total perimeter is 16 feet. - - - - - --------- ! ! ^ !! y ---------

36. ## physics

a 4 kg model rocket is launched, shooting 50 kg of burned fuel from its exhaust at an average velocity of 625 m/s. What is the velocity of the rocket after the fuel has burned.? Ignore effects of gravity and air resistance.

37. ## stats

A random sample of 12 joggers was asked to keep track and report the number of miles they ran last week the responses are: 5.5 7.2 1.6 22.0 8.7 2.8 5.3 3.4 12.5 18.6 8.3 6.6 a) Compare the three statistics that measure central location. b) Briefly describe

38. ## Geometry

A study draws triangle with a perimeter 36cm.the study says that the longest side measures 18cm. how do you know that the student is incorrect?

39. ## physics

a 35 kg bullet moving at 475 m/s. strikes a 2.5 kg wooden block. the bullet passes through the block, leaving at 275 m/s. the block was at rest when it was hit. how fast is it moving when the bullet leaves?

40. ## math

In a third grade class 2/5 of the students wear glasses. What fraction of the students do not wear glasses? If 16 students wear glasses, how many students are in the class altogether?

41. ## Chem II

For the reaction H2+I2, Kc=55.3 at 700K. In a 2. L flask containing an equilibrium mixture of three gases, there are .056g H2 and 4.36 g I2. What is the mass of the I2 in the flask?

42. ## statistics

find the number z such that the proportion of observations are less than z in a standard normal distribution is 0.8

43. ## math

a group of students go out for lunch. if two have hamburgers and five have hotdogs, the bill will be \$8.00. if five have hamburgers and two have hotdogs,the bill will be \$9.50. what is the price of a hamburger?

44. ## physics

A large merry-go-round completes one revolution every 10.5 s. Compute the acceleration of a child seated on it, a distance of 5.20 m from its center. what is the magnitude?

45. ## Physics

Two charged particles exert an electrostatic force of 8 N on each other. What will the magnitude of the electrostatic force be if the distance between the two charges is REDUCED to one-third of the original distance? Would you just have to multiply 8 by 9?

46. ## Physics

A train is moving 50km/h east. A person is walking 5 km/h west on the train. How fast is the person on the train going relative to an observer on the earth?

47. ## Physics

A 5.0g silver spoon at 20.0C is placed in a cup of coffee at 90.0C. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0C?

48. ## chemistry

An unknown metal will be used in this experiment. If you do not remove the moisture between trials houw would moisture effect the dendity in a graduated cylinder calculation?

49. ## physics

The frequency of an ambulance's siren is 700 Hz. If a pedestrian on the side of the road hears the siren at 756 Hz, approximately how fast and in what direction is the ambulance moving? a- There is not enough information b- 25 km/h, away from the

50. ## physics

the tennis ball may leave the racquet on the serve with a speed of 65 m/s. If the ball's mass is 60 g, and it is in contact with the racquet for .030 s, what is the average force on the ball?

51. ## personal finance

Personal Finance.Why is it important to go through these steps when you are planning on making a large purchase?

52. ## College General Chemistry

How would you prepare each of the following solutions? a. 100mL of a 155ppm solution of urea, CH4N2O, in water. b.100mL of an aquaneous solution whose K+ concentration is 0.075M

53. ## physics

a 35 kg bullet strikes a 5 kg wooden block and embeds itself in the block. the block and bullet slide off together at 8.6 m/s. what was the original velocity of the bullet?

54. ## physics

A cylindrical container 1.7 tall contains mercury to a certain depth, . The rest of the cylinder is filled with water

55. ## physics

Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one

56. ## Statistics for social sciences

For a population with u=50 and o=8, find the z-score for x=54, x=42, x=62 ,x=48 ,x=52 ,x=34

57. ## chemistry

Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 °C. What would the pressure be if the

58. ## Spanish

Enter the correct conjugation of the "-ar" verb for each sentence: 1. Tú y yo _____ cuadernos nuevos. (necesitar) 2. ¿_____ ustedes los nombres de mis amigos? (olvidar) 3. Nicolás _____ un regalo a su abuela. (presenter) 4. Yo _____ a Dios. (alabar)

59. ## Research and Statistics

I want to ensure I've done this problem correctly. Thanks! 3. In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject. Mean SD Math 67 9.58 English 78

60. ## physics

A damped mass-spring system oscillates at 190 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.5 cm and the energy of the oscillating system is then 65 J. (a) What is the amplitude of oscillation at t = 2.0 s? What

61. ## math

A charity fund-raiser consisted of a spaghetti dinner where a total of 387 people were fed. They charged \$6.80 for adults and children were half price. If they took in \$2444.60, find out how many adults and how many children attended the dinner. I have no

62. ## Calculus

Find the exact area below the curve (1-x)*x^9 and above the x axis

63. ## physics

Moon is a natural satellite of the Earth, circling it with period (time of one revolution), T = 27,3 days. Radius of Moon’s orbit = 384,000 km. Find the acceleration of the Moon toward the Earth.

64. ## chemistry

Calculate the mass for: A gold sample that absorbs 225 J to change its temperature form 15 degrees celsius to 47 degrees celsius.

A car starts from rest and travels for 5 seconds with a uniform acceleration of 2m/sec^2. The driver then applies the breaks causing a deceleration of 1.5m/sec^2. If the breaks are applied for 4 second, how fast is the car going after the breaking period?

66. ## Physics

A 2.0 kg ball and a 3.5 kg ball are connected by a 2.0 m long rigid, massless rod. The rod and balls are rotating clockwise about its center of gravity at 21 rpm . What torque will bring the balls to a halt in 6.0s?

67. ## Geometry

list the sides in order from shortest to longest in angle PQR,with P=45,Q=10x+30,and R=5x

68. ## Algebra

What system of equations do I use to solve the following question? A boat traveled 336 miles downstream and back. THe trip downstream took 12 hours. THe trio back took 13 hours. What is the speed of the boat in still water What is speed of the current?

69. ## physics

a .415 kg baseball is pitched at 42 m/s. the batter hits it horizontally to the pitcher at 58 m/s. a) find the change in momentum of the ball. b) if the ball and bat were in contact for 4.6*10^-4 s what would be the average force while they touched?

70. ## statistics

A regular feature in a newspaper asks readers to respond via-E-mail to a survey that requires a yes or no response. In the following day’s newspaper, the percentage of yes response. In the following day’s news paper, the percentage of yes and no

Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one

72. ## economics

How would you illustrate the impact of each of the following events on a production possibilities curve for factory goods and farm goods? (a) the computer is invented (b) 1 million farm workers remain unemployed for six months (c) a drought

73. ## physics

calculate the force exerted on a rocket given that the propelling gases are expelled at a rate of 1000 kg/s with a speed of 60,000 m/s.

74. ## Chemistry

Thanks for your help; I am still have a few problems, could you check my work: Given: Volume of vinegar analyzed-5mL Con'c of NaOH-0.09890M Avg. Volume of NaOH from titration-43.75mL Density CH3COOH: 1.049g/mL Calculations: 1.Moles of NaOH required to

75. ## math

joans rectangular garden is 6 meters long and 4 meters wide she plans to double the area of the garden by increasing each side by the same amount find the number of meters by which each dimension must be increased

76. ## math

raquel teaches dance classes each evening starting at5:380p.m. she teaches 3 40 minute classes and 2 50 minute classes.she has a 10 minute break between classes.make a table to find the time her last class ends. a.)9:10 b.)9:20 c.)9:30 d.)9:50

77. ## Physics

A 1.7kg block and a 2.7kg block are attached to opposite ends of a light rope. The rope hangs over a solid, frictionless pulley that is 28cm in diameter and has a mass of 0.74kg .

78. ## Chemistry

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this

79. ## Physics

A 5.0g silver spoon at 20.0C is placed in a cup of coffee at 90.0C. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0C?

80. ## Math

Is the time you take to go to the library a function of the distance to the library? I think it's not a function

81. ## physics

On a string instrument of the violin family, the effective length of a string is the distance between the bridge and the nut. For a violin, this distance is 31.1 cm, while for a cello it is 38.8 cm. The string of a violin is placed in a cello with the

82. ## science

When you freeze water, 80 calories of heat are released into the surroundings for every gram of water that freezes. This is known as the "latent heat of fusion" of water, which is 80 cal/g. Heat of fusion is a characteristic property. Theoretically, if you

83. ## math

an object that weighs 234lb on jupiter weighs 100lb on earth. what would an object that weighs 400 lb on jupiter weigh on earth?

84. ## Geometry

list the sides in order from shortest to longest in angle ABC,with A=80 ,Q =3x+5 , and C =5x-1

85. ## Statistics

Calculate the first, second, and third quartiles of the following samples. 5 8 2 9 5 3 7 4 2 7 4 10 4 3 5 23

86. ## Spanish

62. "¿_____ madar en la piscina o en el mar?" "Prefiero la piscina." a. Quiero b. Quieres c. Queréis d. Queremos B? Not sure.. 63. No _____ en la selva tropical. a. hace calor b. nieva c. hace sol d. nieve B? 64. Necesito ____ para mis vacaciones en la

87. ## physics

A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.48 s for the tile to pass between two windowsills that are 3.0 m apart. How far is the sill of the upper window from the roof of the

88. ## stats

A random sample of 12 joggers was asked to keep track and report the number of miles they ran last week the responses are: 5.5 7.2 1.6 22.0 8.7 2.8 5.3 3.4 12.5 18.6 8.3 6.6 a) Compare the three statistics that measure central location. b) Briefly describe

89. ## statistic

To learn more about the size of withdrawals at a banking machine, the proprietor took a sample of 75 withdrawals and recorded the amounts. Determine the mean and standard deviation of these data, and describe what these two Statistics tell you about the

90. ## Chemistry

what would be the effect on a chromatographic peak of introducing the sample at too slow a rate

91. ## physics

a 20.0 kg child on an 80 kg boat throws a 5 kg package horizontally with a speed of 10 m/s. Calculate the resulting density of the boat, assuming it was initially set at rest.

92. ## Statistic

Examine the three samples listed here. Without performing any calculations, indicate which sample has the largest amount of variation and which sample has the smallest of variation. Explain how you produced your answer. a) 17 29 12 16 11 b) 22 18 23 20 17

93. ## Physic

A ball throw at 45 degree angle with an initial speed of 15m/s. the time for the ball to reach its highest point can be found from the data and known constants using which equation? solve for time?

94. ## economics

1. Using optimization theory, analyze the following quotations: a. “The optimal number of traffic deaths in the United States is zero.” b. “Anny pollution is too much pollution.” c. “We cannot pull U.S. troops out of Iraq. We have committed so

95. ## stats

A random sample of 12 joggers was asked to keep track and report the number of miles they ran last week the responses are: 5.5 7.2 1.6 22.0 8.7 2.8 5.3 3.4 12.5 18.6 8.3 6.6 a) Compare the three statistics that measure central location. b) Briefly describe

96. ## Science

It would be awesome if you can help me with this :) Two station astronauts each need to perform three 8-hour EVAs during their 13-day mission to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. How much oxygen will

97. ## social studies

A study of the causes of the American Revolution of 1776, the French Revolution of 1789, and the Russian Revolution of 1917 best supports the generalization that revolution is most likely to occur when 1. those in power are resistant to change 2. a society

98. ## physics

a snowmobile has a mass of 2.5*10^2 kg. A constant force acts upon it for 60 seconds. The snowmobile's inital velocity is 6 m/s and its final velocity is 28 m/s. a) find its change in momentum of the ball. b) what is the magnitude of the force action upon

99. ## chemistry

1. If a gaseous sample contains 73% N2 by volume, what is the solubility of N2 in water at 25°C and 1.0 atm (kH in H2O at 25°C = 7.0 10-4 mol/Latm)? 2. Calculate the vapor pressure of a solution of 0.60 mol of cholesterol in 4.5 mol of toluene at 32°C.

100. ## Accounting

On Hune 1, Coble Company Ltd. borrows \$40,000 from first Bank on a 6-month, \$40,000, 9% note. The note matures on December 1. a) Prepare the entry on June 1. b)Prepare the adjusting entry on June 30. c) Prepare the entry at maturity(december 1), assuming

101. ## PERSONAL FINANCE / composition

Ok, need another set of eyes... Here is a question I had to answer. Want to get a second opinion if it reads well, and makes sense. Thanks for any comments. What things do you take into consideration when beginning to plan for investments? Why is it

102. ## Chemistry I am so lost!!! HeLp PLEASE

Water does not easily remove grease from dirty hands because grease is nonpolar and water is polar; therefore they are immiscible. The addition of soap, however, results in the removal of the grease. Examine the following structure of soap and explain why

103. ## physics

A runner X ran the mile race in 4.25 sec. Another runner Y requires 4.55 sec to run the distance. If they start out together and maintain their normal speeds, how far apart will they be at the finish of the race?

104. ## French

Name some jobs that use French. Where knowing French is important? Some jobs that use French are a teacher, translator/interpreter, Travel/hospitality, Foreign service officer, foreign language instructor, etc. Where knowing french is important? -In a

105. ## chemistry

I need help with this question. the question. ask to complete the following relationship between units. question a.___g= 1Gg how would answer a question like this.

Why is studying French important? Why do we study French in Canada? Studying French is important because it's one of the offical languages of Canada, and so it brings in a lot of good job oppurtunities with it. It is also good for travel, its an advantage

107. ## physics

While blowing its horn of frequency 466 Hz, a car accelerates at 0.84 m/s2. The car starts from rest by your side and moves away. How many seconds does it take for the frequency you hear to decrease by 5%? Hint: Do not forget to include the time it will

asked by suuppii .. can anyone help
108. ## French

Can someone help me? I have a quiz on Direct object pronouns and direct object pronouns replacing direct object nouns. I've tried to figure it out but I just can't. Could someone help explain it to me?

109. ## math

A boat starts at point A, moves 3 km due north, then 2 km due east, then 1 km due south, and then 4 km due east to point B. Find the distance AB.

110. ## math

find the range of possible values of x that satisfy the inequality x-5

111. ## Chemistry

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this

112. ## com/170

• Write several sentences describing a recent interaction with a friend or family member about personal finance or credit cards. This interaction may be imagined or real. • Use at least five different pronouns, adverbs, and adjectives in your

113. ## science

How does light pass through a flat lens?

114. ## ap calculus

How do you integrate e to the x power? (integral(e^x)dx)

115. ## Statistic

GMAT and GPA Scores for 12 MBA Students Compute the covariance and the determination and interpret your findings. GMAT- 599 689 584 631 594 643 MBA GPA- 9.6 8.8 7.4 10.0 7.8 9.2 GMAT- 656 594 710 611 593 683 MBA GPA- 9.6 8.4 11.2 7.6 8.8 8.0 Show me

116. ## sci/100

5. Complete the chart. For each provider category briefly describe the education and licensing requirements for practice in the state in which you reside. Then, in the scope of care column, describe the type of care the provider can and cannot legally

117. ## physics

The lowest note of a flute is C4 with a frequency of 262 Hz. If one of the ends of the flute is now closed, the new lowest frequency will be ...

118. ## Calculus

Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line. f(x) = 7 x - 2 x^2 text( at ) \(-1,-9\) m = y =

119. ## physics

Estimate the number of times you sneezed during the past year. Describe how you arrived at this estimate.

120. ## English

I made a few changes to my previous sentences. That's why I'm posting them back to you. Can you see if everything is OK? 1)It is a whitewashed room, in which the boys and the girls are sitting in two compact bodies separated from one another by a space in

121. ## healthcare

Use 10 medical words discussed in this week’s reading to create a written script (no audio required) of dialogue between two medical professionals. Respond to other students by adding anything they may have missed, correcting any errors, complimenting

122. ## Math

How would you work, and solve this problem? Christa is a waitress and collects her tips at the table. At the end of the shift she has 68 bills, all ones and fives. If the total value of her tips is 172, how many of each bill does she have?

123. ## calculus

Suppose that f(x) is bounded: that is, there exists a constant M such that abs(f(x)) is < or equal to M for all x. Use the squeeze theorem to prove that lim x^2f(x)=0 as x approaches 0. if g(x) is Mx^2 then what is f(x) and h(x) according to the squeeze

124. ## College Chem NEED HELP

Calculate the moles of N(2) in a 3.50 litercontainer at 1.15 atm pressure and 28 degrees C. What is the Density of the gas? What is the new pressure if the temperature is raised to 75 degrees C? What is the new density of the gas?

125. ## Chemistry

Is thalidomide a cis isomer or a trans isomers? Thanks

126. ## statistics

For a sample with a mean of M=45, a score of x=59 corresponds to z=2.00.What is the sample standard deviation?

127. ## Stats

The distribution of lifetimes for a particular brand of lightbulbs has a mean of 110 hours and a standard deviation of 20 hours. Suppose a random sample of 35 lightbulbs is taken for observation. What is the probability that the sample mean lifetime will

128. ## Math

I'm just checking myself but here: Lily completed a math project worth 200 points. She earned all but 13 points. How many points did she earn? Isn't it 200-13??

130. ## physics

The frequency of the electromagnetic waves in a microwave oven is 2.2 GHz. A large piece of cake is placed inside this microwave oven without the rotating plate, and left to cook for a while. Once the cake is cut, the distance between adjacent uncooked

asked by sara ..help plz someone
131. ## physics

two carts are on a frictionless surface. a compressed spring acts upon te carts, and the 1.5 kg cart moves with a velocity 27 cm/s to the left. what is the velocity of the 4.5 kg cart?

132. ## physics

A car traveling 59 km/h accelerates at the rate of 8 m/s2. How many seconds are required for the car to reach a speed of 90 km/h? ENTER NUMBERS ONLY (ONE DECIMAL PLACE). NO UNITS

133. ## 5th math

what is the least common multiple (LCM)for 15 and 45? There are 16 girls in a class of 36 student. which expression could be used to determine the number of boys (b) in the class? please! help i think this too hard for 5th grade math. this suppose to be

134. ## Trigonometry

Suppose the angle formed by the line 14y = 23x and the positive x-axis is è. Find the tangent of è.

135. ## english (debate)

hey im in the negative side.the topic is no homeworks on weekends and im the 3rd speaker it really sucks so can you guys help me

136. ## finance

A work at home oppurtunity is available in which you will receive 3 % of sales for customers you refer.The franchise fee is \$ 840.00.How much will your customers have to buy to cover the cost?

What do you consider of when you think of word business? -Add all words/phrases you can think of on your sheet of paper. My list: -organization -computers -company -Financing -Entrepreneur -Marketing What else?

138. ## algebra

A car is travelling at a rate 120 km per hour from town A, then turns right and slows down at 50 km per hour and stops at town B. How far is town B from town A?

139. ## Chemistry

In blueprinting, there are to reactions that occur. The first one: Fe^3+ + C204^-2 (oxalate) -> Fe^2+ + CO3 must occur with light. Can the second reaction described by the chemical equation below occur without light? Fe^2+ + Fe (CN)6^-2 -> Fe3[Fe(CN)6]2

140. ## Physics

A gun is positioned in a cliff 80m above sea level. It fires a shell, which leaves the muzzle with a velocity of 400 m/s in the horizontal direction. What is the closest distance that a ship can approach the cliff without being hit by the shell?

141. ## College Chemistry

The radius of Xe is 1.3*10^-8 cm. A 100-mL flask is filled with Xe at a pressure of 1.4 atm and the temperature is 290 K. Calculate the fraction of the volume that is occupied by Xe atoms.

142. ## physics

A dry water well is 1.5 m in radius and 5.0 m deep. In order from lowest to highest, the fifth resonant frequency (harmonic) of this well is closest to ... Hint: The water well is not just an open-closed tube

asked by urgent help someone plz
143. ## physics

A projectile is launched at an angle of 600. What other angle would give the same range for the projectile if we neglect air resistance?

144. ## Statistics

Run the simulation using n = 3= and n=10 for a uniform, a bell-shaped, and a skewed distribution. Identify the mean of the sampling distribution of sample means for each distribution

145. ## statistics

GMAT and GPA Scores for 12 MBA Students Compute the covariance and the determination and interpret your findings. GMAT- 599 689 584 631 594 643 MBA GPA- 9.6 8.8 7.4 10.0 7.8 9.2 GMAT- 656 594 710 611 593 683 MBA GPA- 9.6 8.4 11.2 7.6 8.8 8.0

146. ## math

On the 1st day the movie opened 35 people saw it. On the 2nd day 16 more people came than on the 1st day so that 86 people had seen the movie after the second day. On the 3rd day 67 people came, 16 more than on the 2nd day, If each day 16 more people saw

147. ## Math

Is the price of a piece of cloth a function of the length of the cloth? Explain

148. ## algebra

i have 2 solve by elimination an i keep gettin fractions when the answer is (-3,-3) my teacher gave me the answer an problem but she wants me 2 work it out idk how i keep gettin fractions the problem is: -3x-4y=21 8x-5y=-9 please help

149. ## English

1.Jenny (had) never (used) graphics software on the computer. 2.She (was writing) a report about the Ohio River. 3.Jenny (wanted) photographs in her report. 4.She (has been taking) many pictures of the Ohio River. 5.Jenny (has Scanned) the photographs with

150. ## Physics

the relationship between rotational speed and net force is direct right? and also can u say why it is direct

151. ## finance

a \$200 cash advance by using checks linked to to her credit card account.The bank charges a 2 % cash advance fee on the amount borrowed and offers no grace period on cah advances.Sidney paid the balance in full when the bill arrived.What was the cash

152. ## History

What is general welfare?

153. ## Pre Algebra

How do you draw and lable a circle that has an area between 5 and 8 square units?

154. ## Spanish

45. Anita tiene trece años. Es ____ muy bonita. a. un compañero b. una mujer c. una abuela d. una muchacha D? 47. Yo tengo ojos _______ y pelo ________. a. negros/negro b. azul/negro c. pelirrojos/rubio d. verde/castaño Not sure between A, B, and D 48.

FILL IN THE BLANKS: THE DRIVER IS ? COMPARED TO THE CARSEAT AND ? COMPARED TO THE SIDEWALK.

156. ## health

explain the decision-making process you use when deciding whether or not to seek medical care for the types of symptoms listed in the chart. Provide an example for each of the five symptom categories; one example of when you would treat the symptom

157. ## physics

a wheel revolves about a fixed horizontal axis through O (the center). During a certain interval of time, the angular velocity (which initially is 20 rad per second clockwise) changes uniformly at such a rate that the angular displacement is 60 rad

158. ## Math

Describe the mistakes. 3 x 8 - 4 x 5 = 100

160. ## Math

Julia deposits \$900 in a savings certificate that pays 6.5 % annually. How much money will Julia have at the end of one year?

161. ## math

How do you turn45/72 into a decimal?

162. ## science

Soil is usually called an abiotic factor in an ecosystem.Why can soil also be considered a biotic factor?

163. ## Statistic

Calculations please, Calculate the first, second, and third quartiles of the following samples. 5 8 2 9 5 3 7 4 2 7 4 10 4 3 5 23

164. ## Chemistry

Is thalidomide a cis isomer or a trans isomers? Thanks

165. ## chemistry

How many moles of H2SO4 are required to produce 100kg of CaSO4 from CaCO3

A 3.50 liter ballooncontains air at 65% relative humidity at 22 degrees C at 1.0 atm pressure. A small peice of Na metal is introduced to the balloon to remove all of the water vapor. What would the new volume be for the dry air in the balloon?

167. ## Confidentiality in Allied Health

I have questions that I need to answer and submit as a research. It has been years since I have written a paper and would like to know if the questions, I am answering need to be included in the paper?

168. ## College Chemistry

Calculate the volume of carbon dioxide produced from .025 g of aluminum carbonate and excess HCl at 25 degrees c and 745 toor according to the following reaction: Al(2)(CO(3)(3)) (aq) + HCl (aq) ----- AlCl(3) (aq) + H(2)O + CO(2) (g) im using the numbers

169. ## science

an experiment for ORGANIC FOOD!!!!!!!!!!!!!!!!!!!!!!!!!!

170. ## science

FILL IN THE BLANK: THE CAR DRIVER IS ___ COMPARED TO THE CARSEAT AND ___ COMPARED TO THE SIDEWALK.

171. ## geometry

A right triangle has a base that is 2 more than twice the height. Find the length of the base for the triangle. If the area is 30 square units.

172. ## stats

a) Explain the difference between sampling error and no sampling error.

173. ## algebra

Solve -7x - 20= -24 2/3

174. ## Science

A ball is thrown vertically into the air and takes 5s to return to the thrower, from time of projection. What is the time it takes to reach maximum height ?

log

176. ## chem

how do I write "Uv light" in lewis structure?

177. ## math

sandra is making 3 gallons of lemonade reception.If each scoop of powdered lemonade mix dissolves in enough water to make 3 quarts of punch,how many scoops of powdered mix will she use? ( hint: 4 quarts = 1 gallon

178. ## Physics

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?

179. ## Physics

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?

180. ## geometry

what is approximate area of triangle if each side is 36 inches long

181. ## Math

how do find lcm and gcf of 165,275

182. ## English

Can you please check if the following sentences are possible, please? Thank you very much. 1) Th scene takes place in a classroom of M'Choakumchild school. 2)It is a whitewashed room, in which the boys and the girls are sitting in two compact bodies

183. ## Finance

Need help with computing taxable income. Can someone explain to me how this is done. Gross salary, 46,660 Interest earnings 225 Dividend Income 80

184. ## Chemistry

Is thalidomide a cis isomer or a trans isomers? Thanks

185. ## English

I forgot to include these other sentences on the same theme. Thank you very much for your help. 1) He is compared to a cannon loaded to the muzzle with facts and prepared to blow them clean out of childhood. (What does it mean? I can't express this

186. ## Math

If I have 4 triangles and 6 circles, what is a proportion that I can make? If I have 8 hearts and 10 diamonds, what is a proportion I can make?

187. ## Statistic

The professors at Wilfred Laurier University are required to submit their final exams to the registrar’s office 10 days before the end of the semester. The exam coordinator sampled 20 professors and recorded the number of days before the final exam that

188. ## lab

i need 200mL of an 8 molar solution of dilute acid, and my stock cconcentrate is 18 molar, how much of the concentrate, and how much water will i need?

21/8 divided by 5/6=? in simplest form

190. ## French

Why is studying French important? Why do we study French in Canada? Studying French is important because it's one of the offical languages of Canada, and so it brings in a lot of good job oppurtunities with it. It is also good for travel, its an advantage

191. ## medicine

What is a quality-adjusted life year? How can it be used to compare differences in health status between someone who is healthy and someone who is not? Can it be used to compare health outcomes of someone who is ill with someone who has died? Indicate at

192. ## English

Thank you very much for helping me. I just need you to check these sentences I'm still doubtful of. 1)He is compared to a cannon loaded to the muzzle with facts determined to "bombard" his pupils with them 2)The depiction of the two pupils is achieved

193. ## science

whats the catchy title for aluminum which can be used for poster making??

194. ## Criminal Justice

I need to write a paper on the differences of police officers with a GEd and those with further education. Also do either have more civil rights complaints

195. ## To ...weirdo

Please find a normal first name without all the strange (and possibly lewd) symbols. I've deleted a couple of your posts for the questionable symbols on them.

196. ## Physics-HELP

Two resistors, 80.0 and 66.0 , are connected in parallel. The current through the second resistor is 2.40 A. What is the current in the first resistor? What is the total power supplied to the two resistors? I got the answer for the first question but i

197. ## algebra

-7x-26=-30 2/3

198. ## health

Why would the task of Universal health care coverage raise health care costs?

199. ## science

What would happen if decomposers were no longer in a food chain?

200. ## Physics

create a graph with your data of rotational speed vs radius. independent variable goes on x axis. which is x axis and which is y axis out of radius and rotational speed

201. ## math

Is each ordered pair a slotuion of the given system? write yes or no. 1. y=6x+12 2x-y=4 (-4,-12)______

202. ## science

What is the [Pb+2] in a saturated solution of Pb(OH)2 for each of the following initial pH values? Ksp Pb(OH)2 = 2.8x10-16 a. pH = 13.00 b. pH = 9.20

204. ## chemistry

If 12.45gm NaCL is dissolved in 115ml of water, what is the density of NaCL?

205. ## Geometry

find the perimeter of a square l=.66yd

Marianna's rectangular garden is 15 yards long and 10 yards wide. She wants to stretch a wire for hanging lights from one corner of the garden to the opposite. About how long should the wire be?

207. ## physics

You blow a whistle of frequency 942 Hz, as you move towards a wall. The frequency of beats you hear from the whistle and the reflected sound is 7 beats/s. In m/s and to two significant figures, how fast are you moving towards the wall?

asked by help need . Mansuri
208. ## parts of speech

What parts of speeech in English express huour

209. ## algebra 11

a normal distribution has a mean of 22 and a standard deviation of 3. Find the probablility that a randomly selected x-value is in the given interval. Between 19 and 25.

210. ## Physics

how fast must a roller coaster be going to get around a vertical loop with a radius of 15 m

211. ## physics

a wheel revolves about a fixed horizontal axis through O. During a certain interval of time, the angular velocity (which initially is 20 rad per second clockwise) changes uniformly at such a rate that the angular displacement is 60 rad counterclockwise,

212. ## sewing

how do you secure the beginning and end of every seam?

213. ## English

I forgot to include the following sentences. I really hope you can have a look at them. 1)He asks his pupils for her name and she replies her name is Sissy Jupe. In his opinion that isn't a name. 2) He objects first to her name, which must really be

214. ## Finance

Compute taxable income. gross salary 46,660 interest earnings 225.00 dividend income 80.00 one personal exemption 3,400 itemized deductions 7,820 adjustments to income 1,150 What amount would be reported as taxable income?

215. ## algebra

A roof rises 1.4 feet vertically and 11.8 feet horizontally. What is the grade of the roof? The grade of the roof is _____% how do I begin to find the answer to this

216. ## geography

HOW DOES EUROPE'S GEOGRAPHY (LOCATION, RESOURCES, CLIMATE, ETC) EFFECT THE LIFE OF THE EUROPEANS?

217. ## composition

Do I have five different pronouns, adjectives, and adverbs? Curtis, my children’s father and I are in the process of moving to a larger (adj.) apartment. Our personal (adj.) finances have been the topic of conversation as of late. There is concern;

218. ## algebra

explain how to check a solution of an equation.

219. ## eee

the market mix

220. ## English

1.She (uses) a viewer program to look at the photographs. 2.Jenny's new software (helps) her modify the photographs. 3.The picture (was) too dark. 4.Jenny (cropped) the photo using the new software. 5.Jenny (will have improved) her photographs. Tell if

221. ## geometry

the height of a flagpole

222. ## Chemistry - Oxidation, Reduction Reactions

Fe^3+ + C204^-2 (oxalate) -> Fe^2+ + CO3 Which is the oxidizing agent and the reducing agent in the chemical equation above?

From minute you woke uo to the present time, list all ways business has touched your life today. Woke up at 6:30 Am from nightsuit purchased at the mall and made in China. Brushed teeth with colgate total manufactured in U.S.A. Prayed from sikh gutka

224. ## Chemistry

If 682000 kJ could be transferred with 100% efficiency to water, what volume of water, in liters, could be heated from 8.6 degrees Celsius to 60.0 degrees Celsius as a result?

226. ## Math (Algebra 2)

Factoring by Using a Quadratic Form Problem: x^4 + 8x^2 - 20 What I have so far: (x^2)^2 + 8(x^2) - 20 a^2 + 8a - 20 For some reason my textbook says to substitute the (x^2) with (a) as you can see in the las step. The next step after that is factoring

227. ## eth/125

How do you think slavery influenced the evolution of both Black and White America today?

How do changes of state help to separate crude oil into many products?

229. ## college algebra

5+2(4y-4)=3(2y-1)solve

230. ## English

As promised, I'm posting you the sentences I'm really doubtful of. I hope you can help me with the rephrasing. 1)He has devoted his entire life to pursuing facts. He is described as carrying a rule, a pair of scales and a multiplication table always in his

231. ## math

whats 1\2- 1\10

232. ## Complex Numbers

How do I go about finding the solutions to the following x^2-6x+25=0 I know the answer is 3-4i and 3+4i however, I do not know how to go about finding the these solutions Thanks :)

233. ## math

(1/3 +5/6)divided by 2/5=? in simplest form

234. ## Mathematics

If |x-3| is not equal to 5. What is the value(s) of x, expressed in set notation?

235. ## calculus

Suppose that f(x) is bounded: that is, there exists a constant M such that abs(f(x)) is < or equal to M for all x. Use the squeeze theorem to prove that lime x^2f(x)=0 as x approaches 0.

236. ## Calculus I

evaluate and justify each step lim((xe^x)/tan x) as x approaches 1. i just need the over all jest of the problem because i don't know what to do to get rid of the 0 in the denominator. Thanks.

237. ## Engineering Science

A ball is thrown vertically into the air and takes 5s to return to the thrower, from time of projection. What is the time it takes to reach maximum height ?

238. ## Controls

If you have a tank of water at sea level and the temperature of the water in the tank is 110 degrees F, what is the height of the water if the pressure at the bottom of the tank is 95 inches of mercury(absolute)

239. ## physic

examples of mechanicals waves

240. ## Physics

it says create a graph from our data. rotational speed vs force. i know that independent variable goes on the x axis. but out of rotational speed and force which goes on the x axis and which goes on the y?

241. ## Algebra

-11 < 3x-4 < -3

242. ## english

wars an its effect

243. ## computers

IF POSSIBLE CAN U GRAPH OR RATHER CALCULATE THE COMMISSION ON SALE . THE COMMISSION IS 6% ON ALL SALES THAT ARE LEAST 20% ABOVE COST

244. ## RECORD MANGEMENT

I NEED HELP IN CODING AND INDEXING RECORDS.

245. ## college algebra

2/3(5/4+2d) + 1/3=2/5

246. ## History

Descirbe "To provide common defense"

247. ## math

given f(t)=3t-5,g(t)=2-t^2,h(t)=t^3-7, compute (g x h)(-2)

248. ## math

2 people entered 1/3 of what they did in a contest? one won 2 ribbons, one won 3. Why the difference?

249. ## Physics

the relationship between linear speed and net force is inverse right? can someone explain why to me please.

250. ## math

how do you add 3 1/2 + 1 3/4

251. ## Math

(Factoring a sum or difference of cubes) and (solving a polynomial equation). 2x^3+2=0

252. ## Science

What does a mirror or any shinny object do to light? Is the answer reflect

253. ## Physics

it says create a graph from our data. rotational speed vs force. i know that independent variable goes on the x axis. but out of rotational speed and force which goes on the x axis and which goes on the y?

254. ## algebre

Solve: -5x - 23= -26 1/3

255. ## math

calculate the volume to the nearest hundreyh of a cylinder with r=17cm and h=3cm

256. ## science

how do u learn the skeleton bones in one night

257. ## science

Can you give me a website on atoms

258. ## math

2+3x+4 input x=3 and output y=6

259. ## math-premises

A bit confused with this one: Is the argument correct? if not explain why it's not and change the minor premise to make it correct: All NBA basketball players are over 5ft. tall Russell is 6ft tall Therefore, Russell plays in the NBA Thanks!

260. ## Math

how do you simplify cubed root of 625y to the 3th power z to the 7th power

261. ## science

i need a catch phrase for an element project subject "silver"

262. ## math

what do you get if you subtract 17/19ths and 2/13ths

b=a+x, for a

264. ## math

The triangle above has side lengths of 24 mm and 38 mm. Which set of dimensions would produce a similar figure?