# Questions Asked onOctober 10, 2012

1. ## trig

A survey team is trying to estimate the height of a mountain above a level plain. From one point on the plain, they observe that the angle of elevation to the top of the mountain is 24. From a point 1000 feet closer to the mountain along the plain, they

2. ## Physics

A 2.0kg wood block is launched up a wooden ramp that is inclined at a 26 angle. The block's initial speed is 8.0 m/s. The coefficient of kinetic friction of wood on wood is 0.200. a) What vertical height does the block reach above its starting point?

3. ## Science

Why are aboriginal clan systems considered a human social system?

4. ## Calculus

Two ships leave the same port at noon. Ship A sails north at 22 mph, and ship B sails east at 12 mph. How fast is the distance between them changing at 1 p.m.? (Round your answer to one decimal place.)

I have this question: Which is the smallest unit of measurement for temperature? One Celsius degree: one Kelvin:one Fahrenheit. I think it is Kelvin but I can't find anywhere in my book where it refers to that. When I google all three it says Celsius &

6. ## Physics

Two masses m are attached to two vertices of an equilateral triangle made of three massless rods of length l. A pivot is located at the third vertex, and the triangle is free to swing back and forth in a vertical plane. If it is initially released from

7. ## chemistry

Consider the following overall reaction which is experimentally observed to be second order in AB and zero order in C: AB+C -> A+BC Determine whether the mechanism below is valid for this reaction AB+ AB -> AB(sub 2) + A slow AB(sub2) + C -> AB+BC fast

8. ## Physics

Show that the average speed of a rabbit that runs a distance of 30 m in a time of 2 s is 15 m/s. I have a whole bunch of problems such as these and i'm not sure what math formula to use to figure problem.I know its Acceleration ! change of velocity time

9. ## chemistry

the net ionic equation for the following molecular equation KNO2(aq) + HCl(aq) KCl(aq) + HNO2(aq)

10. ## Physics

In tests on earth a lunar surface exploration vehicle (mass = 5.90 103 kg) achieves a forward acceleration of 0.215 m/s2. To achieve this same acceleration on the moon, the vehicle's engines must produce a drive force of 1.64 103 N. What is the magnitude

11. ## chemistry

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter with a total heat capacity of 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using these

12. ## math

A 15 m ladder leans against a wall,its bottom is 9m from the wall. How much would the lower end have to be pulled away from the wall so that the top of the ladder would slide down the same amount?

13. ## pre-ap Algebra 2

write a polynomial function f of least degree that has the rational coefficients, a leading coefficient of 1, and the given zeros. Given zeros: -2,2,-1,3, sqrt 11

14. ## calculus

a man on a dock is pulling in a boat by means of a rope attached to the bow of the boat 1ft above the water level and passing through a simple pulley located on a dock 8ft above the water level. if he pulls in the rope at a rate of 2ft/sec, how fast is the

15. ## algebra

approximate square root to the nearest integer-------- square root of 46

16. ## College physics - Center of mass

College Physics- Center of Mass? The objects in the figure below are constructed of uniform wire bent into the shapes shown (Figure 1) . Each peice has a length of 0.15 . There are two objects that we need to figure out the x- and y-coordinates of the

17. ## Pre-calc

Use the given zero to find the remaining zeros of the function: h(x)=x^4-15x^3+55x^2+155x-1476 Zero:5-4i I multiplied [x-(5-4i)][x-(5+4i)] and got x^2-10x+9. The example I have says to divide that by h and get a second quadratic equation that is also a

18. ## Statistics

The probability distribution of the number of accidents in Grand Rapids, Michigan, each day is given by x 0 1 2 3 4 5 P(x) .20 .15 .25 .15 .20 .05 This distribution is an example of:

19. ## Basic Math

How can absolute value help one to understand the size of a quantity? Give an example. I'll appreciate anyone's help thanks. :)

20. ## Math

Jason is tiling a patio. The tiles are each 1 square decimeter. The patio is 6 meters long and 4 meters wide. How many tiles will Jason need?

21. ## english

I am writing a dialogue between two characters in "Groom Service", I don't know if I am on the right track. I will appreciate it if you culd help me to read through this conversation nad make suggestions. I really appreciate our contributuion. After Martha

22. ## English

Please I need an answer to this question: who is the antagonist in Groom Service short story. How does the author convey his/her character.

23. ## Genetics

In chickens, the Leghorn variety has white feathers due to an autosomal dominant allele. Silkies have white feathers due to recessive allele in a second gene. If true-breeding white leghorn is crossed to a true breeding white silkie, What is the expeected

24. ## Statistics

A 50-question true-false exam is given. Each correct answer is worth 10 points. Consider an unprepared student who randomly guesses on each question. In your solution, please be sure to show the exact steps you used to arrive at the answers. A. If 5 points

25. ## Physics

Assume a perfectly elastic collision between a 916g bat and a 145g baseball. Initially, the ball was moving at 32 m/s toward the ball and afterward it's heading away at 40 m/s. Find bat's speed before and after collision.

26. ## Chemistry

Microwave ovens emit microwave energy with a wavelength of 12.2 cm. What is the energy of exactly one photon of this microwave radiation?

27. ## chemistry

what is the molar enthalpy change when 147 g of water cools from 90.0 degrees C to 17.0 degrees C

28. ## English

Read each sentence then underline the helping verbs and circle the main verbs 1.Books do furnish a room helping:do main:furnish 2.I am walking to school these days helping:am main:walking 3.The water line must have burst. helping:must have main:burst 4. I

29. ## Math (kindergarten)

Break apart the addends. Solve for the total sum. 18 + 21 --------

30. ## Science

In a constant-pressure calorimeter, 70.0 mL of 0.330 M Ba(OH)2 was added to 70.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.27 °C to 25.77 °C. If the solution has the same density and specific heat as water,

31. ## Chem

Balance the following chemical equation (put the coefficients in order) Fe + O2 + H2O → Fe(OH)

32. ## Linear Algebra

1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.

33. ## algebra

Find the least common multiple of the monomials. 5a squared, and 16a cubed. Also 17b squared and 3b cubed. Could you show me how to do these. Thank you, Sandy

A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

35. ## physics

A small ball of mass 2.00 kilograms is moving at a velocity 1.50 meters/second. It hits a larger, stationary ball of mass 5.00 kilograms. What is the kinetic energy of the system after the collision if the collision is elastic?

36. ## earth science

according to the condensation theory the most important factor for the formation of our planet was

37. ## math

how do you do this table? (gx2)-3 ?

38. ## Geometry

Determine whether triangle DEF is congruent to triangle PQR given the coordinates of the vertices. Explain. D(-6,1) E(1,2) F(-1,-4) P(0,5) Q(7,6) R(5,0)

39. ## History

What happened when Christopher Columbus met the Taino Indians? I need as much information as I can get, as I'm writing a research report for history, thanks!

40. ## Writing

Can you proofread this writing? I also need a good title. Theme, what comes to mind when you hear this word? When I hear this word, I think of the overall meaning or lesson of a story. In the story, “Two Kinds, by Amy Tan there were many themes that fit

41. ## Math

The area of a rectangle is 20 square inches. The length of the rectangle is 1 inch longer than the width. What are the length and width of the rectangle?

42. ## physical

The pail and its contents have a mass of 60 kg. If the cable is 15 m long, determine the elevation of the pulley for equilibrium. Neglect the size of the pulley at A

43. ## time and stress management

once you've determined your long and short term goals you can use ?to determine how to best use your time (a)filing system (b)tickler file (c)monthly calendar (d)to do list really not sure if its c or d could someone please help me

44. ## chemistry

How many formula units make up 25.2 of magnesium chloride?

45. ## CHM

Need help please Which of the following equations has the coefficients 2,1,1,2 when it is balanced? Fe2O3 + HClO4 → Fe(ClO4)3 + H2O Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O KOH + H2SO4 → K2SO4 + H2O Ba(OH)2 + P4O10 → Ba3(PO4)2 + H2O Al2O3 + H2SeO4 →

46. ## math

if an airplane is traveling at 245 meters per second, how many kilometers per second does it travel?

47. ## Physics

Two students are on a balcony 22.3 m above the street. One student throws a ball, b1, vertically downward at 19.2 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed. The second ball just misses the balcony on

48. ## math

prove that a^2+b^2+c^2-ab-bc-ca is always non negative for all the value of a' b and c

49. ## Statistics

A sample of 50 values produced the following summary statistics: Q1 = 10, Q2 = 14.6, Q3 = 16.7 and x = 15.3. Based on this information, the left and right ends of the box in a box and whisker plot are, respectively, a. 10 and 14.6 b. 14.6 and 16.7 c. 10

50. ## Science

What products is formed when zinc is added to dilute hydrochloric acid?

51. ## Math

how many positive integers not exceeding 2001 are multiples of 3 or 4 but not 5

52. ## physics

A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 12.0 N force directed 25.0° below the horizontal. (a) Determine the work done by the applied force. J (b) Determine the work done by the normal force exerted by

53. ## physics

A 7.80-g bullet moving at 520 m/s penetrates a tree trunk to a depth of 4.60 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. N (b) Assuming the frictional force is constant, determine how much time

54. ## earth science

Astonomers think planets formed from interstellar dust and gases that clumped together in a process called

55. ## physics

A fox is chasing a bunny. The bunny is initially hopping east at 7 m/s when it first sees the fox. Over the next half second the bunny changes its velocity to west at 12 m/s and escapes. What was the bunny's average acceleration (magnitude and direction)

56. ## physics

An object has an x-momentum of 8.5 kilogram·meters/second and a y-momentum of 9.8 kilogram·meters/second. What is resultant momentum of the object?

57. ## Math help!

Jack has the following scores on exams in his math class. 81, 87, 93, 89, 61, 81 If he wants to make his performance sound as good as possible, which measure should he use—the mean, the median, or the mode of his exam grades when he talks about how he is

58. ## direct an inverse variation

The number of books checked out from the library varies directly with the number of book reports assigned. There were 3375 books checked out when there were 225 book reports assigned. How many book reports have been assigned if there are 13,500 books

59. ## Linear equation

Write a linear equation relating x and y x 0 3 6 10 y 2 8 14 22

60. ## chemistry

A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is the mass percent of oxygen in the compound?

61. ## Chemistry

Molarity of NaOH solution = 0.06115 Volume of NaOH used = 15.50 mL Volume of unknown Sample = 10.00 mL Find the Moles of NaOH used? Find the molarity of H3PO4? Thanks!

62. ## physics

A 8.80 kg bowling ball moves at 1.80 m/s. How fast must a 2.45 g Ping- Pong ball move so that the two balls have the same kinetic energy

63. ## Chem

Which of the following ionic compounds are soluble in water? Potassium perchlorate Lithium phosphate Lead nitrate Barium perchlorate Lead iodide

64. ## Physics

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.10 m. Two of the spheres have a mass of 3.20 kg each. The third sphere (mass unknown) is released from rest. Considering only the

65. ## Linear Algebra

1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.

66. ## Health care Information System, Question 2

Collecting Information Predict ways that the collection of patient information will become more efficient, expansive, and accurate during the next 20 years. Provide specific examples to support your response.

67. ## math

In order to make the most accurate calendar, the following system was devised. Leap years occur every 4 years except for years ending in 00, but years divisible by 400 are leap years. In this case, the year is a leap year if it is divisible by 400. Which

68. ## A.P. Environmental Sciences

.5 grams of pure copper sulfate powder and 2L of water were used to create a copper sulfate solution with a concentration .5ppm. How was this done?

69. ## Health care Information System, Question 3

From your own Internet research, to find a report card for one or more of your local hospitals. "Using Information" Please respond to the following: Create a very brief scenario (1-2 sentences) in which specific information should be collected. Determine

70. ## English

Seals balance balls on their noses on command. Is command the object of the prep. on

71. ## Science

24.62 g of nickel heated and then immersed in 200ml of water. the temperature of the water rose 22.50c to 32.20c.The specific heat of NI is .470J/g*C. What is the temperature of the Ni before it is immersed in the water?

72. ## Health care Information System, Question 4

From your own Internet research, to find a report card for one or more of your local hospitals. From the e-Activity, discuss how you would use the information you found on the report card if you or a family member needed health care. Describe the effect

73. ## chemistry

could donuts be quantified in terms of instead of number explain? here's my answer but not sure of it: sure...but, since the mass of donuts varies, if you ordered say a pound of donuts at dunken donuts, you may get a partial donut or two. for that matter

74. ## Grammar

What are the nouns in the sentence whales have brains as big as watermelons.

75. ## phsyics

An accelerometer in a control system consists of a 4.70 g object sliding on a horizontal rail. A low-mass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

76. ## Calculus

F(x)=|x-5| evaluate the following limits lim x->5- ( f(x)-f(5))/(x-5) lim x->5+ ( f(x)-f(5))/(x-5)

77. ## Health

What causes depression? A. Genetic issues B. Biochemical issues C. There is no known cause D. Environmental issues Reset Selection

78. ## chemistry

could donuts be quantified in terms of mass instead of number explain? here's my answer but not sure of it: sure...but, since the mass of donuts varies, if you ordered say a pound of donuts at dunken donuts, you may get a partial donut or two. for that

79. ## 9th grade living enviroment

I Really need help i need 2 write in a paragraph a correalational study i really really need help.. PLEASE

80. ## physics

if a football kicked at ground level at 24.4 m/s at a 24 degree angle from horizontal. how long does it take for the football to hit the ground

81. ## Statistics

In two-sample testing, when is it appropriate to use a t test or a z test

82. ## physics

A 48.4 N child is in a swing that is attached to ropes 1.24 m long. Find the gravitational potential energy associated with the child relative to her lowest position when (a) the ropes are horizontal

83. ## Chem Problem

I originally asked you the first question and I got the answer 7.7 but theres other parts to the problem but Im not sure what to do In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was

84. ## English

I am a bit stumped here. Working on syllogisms. To be a valid syllogism, the conclusion must be proven by the reasons. We are to decide if te following are valid or invalid. 1. All zebras are striped animals. No zebras are polar bears. Therefore, no polar

85. ## English

Word box: barrage bigot designate diversity enigma gloat global illusion infuriate motivate pacifist queue restrict sage slake terrain vocation vow waylay wither Choose the same word or most nearly to the words in parenthesis 1.A dirty look made me (droop)

86. ## Algebra

How can you tell by looking at a table if its quadratic, linear or exponential? For ex. x: -2, -1, 0, 1, 2 y: 6, 1, 0, 1, 6

87. ## chemistry

what volume of water should be weighted out to represent one mole of water molecules at 20 degree C

88. ## trig

what is sin x = 1, what is the value of csx

89. ## science

I had to I an experiment where a balloon was tied to each end of a meter stick which was balanced on a pencil over two cans. I had to pop one balloon which caused the pencil, stick and other balloon to fall off the cans. I need to use particle theory to

90. ## chemistry

How many water molecules are in the recommended volume of water (1.50L) that should be consume daily?

91. ## phyics

A train at a constant 44.0 km/h moves east for 42 min, then in a direction 45.0° east of due north for 17.0 min, and then west for 51.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of

92. ## AP Environmental Science

Consider the following heats, copper: 0.384J/g degrees, glass:0.502J/g degrees, water: 4.18J/g degrees, and lead:0.159J/g. Which substance once warmed, would be more likely to maintain its heat and keep you warm through a long party on a cold night?

93. ## chemistry

a new compound composed of just Hex-Nuts and bolts is formed.A 13.7 Kg sample of the new compound is separated into its component elements with the following result 3.84 kg. of hex-nuts and 9.90 kg of bolts. 1. How many hex-nuts are present in the 13.7 kg

94. ## social studies

what state can be found at 60 degrees north latitude and 150 degrees west longitude?

95. ## Calculus 2

find the integral of x/(x^2+4)dx using trigonometric substitution.

96. ## chemistry

In a bunsen burner experiment, when you place a piece of soot covered chalk over the hottest part of the flame, it changes back to a white color. What is the equation for this process? Thank you

97. ## History

In conjunction with the backlash against Buddhism and the revival of Confucianism, women during the Song period entered a long period of cultural subordination, legal disenfranchisement and social restriction True False

98. ## Chem Problem

I originally asked you the first question and I got the answer 7.7 but theres other parts to the problem but Im not sure what to do In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was

99. ## maths

prove that there are no integars p and q such that: (p/q)squared =2

100. ## math

mrs. karson's music class includes both 6th and seventh graders. the ratio's of 6th graders to students ine the class is 4:7. there are 9 seventh graders in the music class how many students sre in the class?

101. ## English 8R - Project help!!!

Is there any pictures of Las Vegas back in 2006 (not 2007-present). Me and my other friends are doing this project for English about the an urban location so we choose Las Vegas. So I have to look some pictures for our powerpoint presention.

102. ## physics

how much weight ca lift aperson in moon who can lift 50kg in moon -how to solve it

103. ## science

Who was One of the first people to state that matter is made up of atoms was A. Democritus B. Rutherford C. dalton D. Aristotle

104. ## Math

Find the limit of (2cosx+3cosx-2)/(2cosx-1)as x tends to pi/3.

105. ## world geography

the earliest europeans to come to africa:a.were the dutch b. landed a few times but did not consider the continent valuable. c. were the spanish. d. traded for several centuries before establishing colonies.

106. ## physics

A spring gun (k = 27.1 N/m) is used to shoot a 51.1-g ball horizontally. Initially the spring is compressed by 16.5 cm. The ball loses contact with the spring and leaves the gun when the spring is still compressed by 11.5 cm. What is the speed of the ball

107. ## trig

what is 7pi/3 in degree .13pi/3 in degree

108. ## Drbob Chem

Why does it not matter whether the OH groups are cis to one another in the furanose ring or trans to one another? Please help!

109. ## Chemistry

If I spill 100ml of a .5 M H3PO4 solution, how many grams of NaOH should be dissolved in water and added to the spill to neutralize the acid?

110. ## Chemistry

If I spill 100ml of a .5 M H3PO4 solution, how many grams of NaOH should be dissolved in water and added to the spill to neutralize the acid?

111. ## CHEM PROB MR BOB

I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was

112. ## physics

A car slows down from 40 km/hr to rest in a distance of 72 m. What was its acceleration

113. ## Chemistry

How many times more energy is associ- ated with a 282 nm ultraviolet photon than a 5494 nm microwave photon?

114. ## Political Science

What are the factors that keep an ideology alive? How does an ideology survive through decades? Is it because of the people, economic structure of a state or simply that once an ideological concept has been developed that it cannot truly disappear?

115. ## Finance

Here is a forecast of sales by National Bromide for the first 4 months of 2012 (figures in thousands of dollars): Month: 1 2 3 4 Cash sales 19 28 22 18 Sales-on-crdt 140 160 130 110 On average, 40% of credit sales are paid for in the current month, 20% in

116. ## math

Together, Misty and Keith caught 29 fish. Keith caught 5 fewer fish than Misty. How many did they each catch?

117. ## None

What is irrational numbers?

118. ## Basic Math

How can absolute value help one to understand the size of a quantity? Give an example. I'll appreciate anyone's help thanks. :)

119. ## Ashford University

Evaluate the ways in which the legacy of slavery has prevented the United States from building a more just society, supporting your evaluation with the textbook and additional sources. Define what Dr. King’s refrain, “free at last,” looks like to you

120. ## Chemistry

If the initial pressures of the H2 and N2 in the flasks in the figure below were instead 350. torr and 160. torr, respectively, what would be the final pressure after the stopcock is opened? Left side of stopcock= 2.00L H2 Right side of stopcock= 1.00L N2

121. ## Statistics: Regression

The June 1997 issue of Management Accounting gave the following rule for predicting your current salary if you are a managerial accountant. Take \$31,865. Next, add \$20,811 if you are top management, add \$3604 if you are senior management, or subtract

122. ## I.T

What are some similarities between computer science and information technology?

123. ## Fractions to Decimals

1/10=0.1 7/10=0.7 48/100=0.48 1/5=0.2 2/4=0.50

124. ## Math

Make up a data set of at least 12 numbers that have the following landmarks. maximum 18 mode 7 range 13 median 12

125. ## History

Did Beatrix Potter have children? How many children did she have? She gave what she had to the National Thrust. I mean the author of the tale of Peter Rabbit. And were can I find the movie Miss Potter about Beatrix Potter?

126. ## Language Arts

Having trouble on when to use a comma and when to use a semicolan with transitional phrases. For example, in the sentence, "The trees could not protect us from the thunderstorm therefore we had to go in to keep from getting wet." Would it be punctuated as

127. ## math

The second of three numbers is 1 less than than the first. The third number is 5 less than the second. if the first number is twice as large as the third, find the three numbers. write an equation and find the numbers please help me

128. ## College Physics

A 0.35 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 20° with the horizontal. Determine the speed of the stone. I've tried tan 20= gr/v^2 = (9.8)(.8)/v^2 = 4.7 m/s and that's not the correct answer

129. ## science

An aircraft travels through the air with a velocity of 200m/s due east. It is found to be travelling over the ground with a velocity of 220m/s in a direction of 20(degree) south of east.The difference between the two is due to thw wind velocity. What is

130. ## Math

Explain how you would use the distributive property to multiply 36 by 99.

131. ## math/algrebra

find the first five terms of the sequence whose nth term is given. (-2)^n + 2^n

132. ## math

the greater of two numbers is 1 more than twice the smaller. three times the greater exceeds 5 ties the smaller by 10. find the numbers and write the equation. please help me

133. ## time and stress management

to analyze exactly what to do with your time ,you need to (a)write down everything that you do in a time inventory (b)buy a daily planner could someone please help me ,i feel it could be either one of these

134. ## MATH

WHAT IS THE PLACE VALUE OF THE 8 IN 7.81

-1/2m > -7

136. ## 7th grade health question

1. What does smart snacking mean? (1 point) Eat while you are studying Eat what your brain tells you to eat Eat nutrient dense foods Read a cookbook 2. What is NOT a way to keep foods safe? (1 point) If it looks and smells okay, it is safe to eat Wash

137. ## physics

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?

138. ## Mathematics Blue

A person is trying to fill her new swimming pool for the first time. Water is flowing into the pool at a constant rate of 30 liters/min. Unfortunately there is a hole and a crack in the pool from which water is leaking. Water is leaking out of the hole at

139. ## statistics

The HR department of an organization collects data on employees' age, salary, level of education, gender, and ethnicity. Which data is more likely to follow normal distribution? Why?

140. ## Stoichiometry

A gas mixture at 27 C and 750 torr contains acetone vapor with 70% saturation. Calculate the temperature to which the gas must be cooled, at constant pressure to condense 40% of the acetone.

141. ## statistics

An aircraft is equipped with three engines that operate independently. The probability of an engine failure is .01. What is the probability of a successful flight if only one engine is needed for the successful operation of the aircraft?

142. ## History

how did the indians feel about being colonised by the brittish? and what was the relationship between the brittish and the indians?

143. ## History

During the Song Dynasty, Jurchen invaders from the North forced the Song to withdraw past the a.Gobi Desert b.Himalayas c.Yellow River d.Yangtze River e.Mekong Delta

144. ## science

if 25 ml of sugar is mixed with 299 ml of water and then 50 ml of water is poured out, how much sugar remains in the 150 ml of wtare?

145. ## physics 101

50kg drops from a height of 2meters straight down with a force constant of 8 x 1000n/m. What maximum distance does she compress?

146. ## probability

An aircraft is equipped with three engines that operate independently. The probability of an engine failure is .01. What is the probability of a successful flight if only one engine is needed for the successful operation of the aircraft?

147. ## physics

A sled loaded with bricks has a total mass of 23.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 12.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

148. ## math

An airplane flying against the wind travels 100 miles in the same amount of time it would take the same plane to travel 140 miles with the wind. If the wind speed is a constant 40 miles per hour, how fast would the plane travel in still air?

149. ## Political Sci

What changed, if anything, in the American political culture between 2004 and 2008? Further, please feel free to examine changes to 2012, and how they might influence this year's November presidential and congressional elections.

150. ## math

if a+b=10 and ab=16.find the value of a^2-ab+b^2 and a^2+ab+b^2

1. Which of the following facts might be related to polar climates? (1 point) Solar energy hits these regions at a low angle. Year-round temperatures are always hot. These regions lie between latitudes 23° north and 23° south. Temperatures in these zones

152. ## math

Below is the rule for calculating the velocity of a falling object. Use this rule to calculate the rate, expressed in feet per second, that a piano, dropped 3 seconds ago, is falling. V(t) = 32t A. 192 feet per second B. 288 feet per second C. 96 feet per

153. ## physics

5 usage for electricity.(in points)

154. ## CHEM HELP ASAP

I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was

155. ## CHEM HELP ASAP

I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was

156. ## international economics

assume the nation of australia is "small"

157. ## algebra

explain how to get answer and what is answer 14 times x to the power of 16 divided by 6 times x to the power of 11

158. ## math

Amy and Kim found a sale in a sporting goods store. Amy spent \$33 on 2 pair of shorts and 3 packages of socks. Kim spent \$27 on 1 pair of shorts and 5 packages of socks. How much does one of each item cost?

159. ## Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

160. ## Math

A garden against the wall of a house is to be surrounded on three sides by a total of 336m of fencing. What dimensions of the garden will result in an area of 14,112m^2?

161. ## Math

Use the following information to determine the number of people in each region of the Venn Diagram 174 people were asked which of these instruments that they could play: Piano, Drums, or Guitar. 33 people could play none of these instruments. 9 people

162. ## Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

163. ## IT

Write a program that will give the interest rate for a new car loan based on a credit score. Credit score Interest Rate 850-720 5.56% 719-690 6.38% 660 689 7.12% 625-659 9.34% 590-624 12.45% Below 590 no credit issued. Display the user input credit score

164. ## math30

The equation of the hyperbola is (x-3)^2/4 - (y+1)^2/16 =-1. What is the range? All I know is this but I am not even sure what I am doing!! My answer: The general form of the equation of a horizontally aligned hyperbola is: (x-h)^2/a^2 - (y-k)^2/b^2 =1. So

165. ## Math

Would you use a benchmark of 1000 to estimate the number of shoes in your classroom? Explain

166. ## physics

If the distance x is 131 meters and the red car is traveling at 7.1 mph, how fast to the nearest hundreth is the blue car traveling?

167. ## Chem

Three bulbs are connected by tubing, and the tubing is evacuated. The volume of the tubing is 32.0 mL. The first bulb has a volume of 78.0 mL and contains 2.72 atm of argon, the second bulb has a volume of 250 mL and contains 2.83 atm of neon, and the

168. ## Calculus

Find the number of cells present after 9 days given the function: f(x)=111.6e^(.44794t)+288.4

169. ## Calculus 2

Evalute the integral of x/(x^2+4)dx using u-substitution and then trigonometric substitution. I did this and got (1/2)ln(x^2+4)+C using u-substitution and x^2+4+C using trigonometric substitution. What did I do wrong??? thank you for helping!

170. ## math

The second of three numbers is 1 less than than the first. The third number is 5 less than the second. if the first number is twice as large as the third, find the three numbers. write an equation and find the numbers

171. ## IT

Write a program that will give the interest rate for a new car loan based on a credit score. Credit score Interest Rate 850-720 5.56% 719-690 6.38% 660 689 7.12% 625-659 9.34% 590-624 12.45% Below 590 no credit issued. Display the user input credit score

172. ## Statistics

The number of traffic accidents per day on a certain section of highway is thought to be Poisson distributed with a mean equal 2.19. Based on this, how many traffic accidents should be expected during a week long period? a. 15.33 b. 10.95 c. approximately

why do the Lina and Doon think tat their arrival has been expected, in the book CITY OF EMBER

174. ## Physics

Two railroad freight cars with masses 110 Mg and 170Mg approach with equal speeds of 0.330 . They collide, the lighter car rebounding opposite its original direction at 0.270 m/s. Find the velocity of the heavier car after the collision. Assume the

175. ## statistics

The heights of women aged 20 to 29 follow approximately the N (64, 4) distribution. Men the same age have heights distributed as N (69.8, 1.1). What percent of young women are taller than the mean height of young men?

176. ## math

40 minutes is what fraction of an hour

177. ## Intro to programming

Tip, Tax and Total question? Design a program that calculates the total amount of a meal purchased at a restaurant in raptor, the program has to ask user the charge of food, calculate the amount of a 15 percent tip, and 7 percent sales tax, display each of

178. ## hist

Which of the following was a problem faced by the average Chinese citizen during the Song dynasty? a.the shrinking use of the civil service exam and thus the lack of opportunity to obtain a government position b.the control of the Chinese treasury by

179. ## Statistics

25 students test grades (possible scores 0 to 100)has a standard deviation of 15. What logically follows???

180. ## intro programming

(algorithm workbench) Write assignment statements that perform the following operations with the variables a,b, and c.

181. ## English

Writing with Possessive Nouns Directions Use possessive nouns or strong nouns to replace each capital lettered phrase. EXAMPLE:THE SADDLE THAT BELONGS TO MY HORSE is made of leathe. My horse's saddle is made of leather. 1.When I stay at the farm, I do many

182. ## Calculus II

A spherical tank with radius of 5 feet is set on a coloumn 15 feet above the ground. How much work is required to fill the tank with water if the solution is pumped from ground level?

183. ## Chemistry

According to Hund's rule,electrons occupy equal energy orbitals so that a maximum number of UNPAIRED electrons results. True or False

184. ## General Chemistry

find [H3O+] and [OH-] 1)a solution that is 5.8×10−2 M in [HBr] and 1.9×10−2M in [NO3]. 2)a solution that is 0.780% HNO3 by mass (Assume a density of 1.01 g/mL for the solution.)

185. ## physics

Tarzan swings on a 34.0-m-long vine initially inclined at an angle of 33.0° with the vertical. (a) What is his speed at the bottom of the swing if he starts from rest? m/s (b) What is his speed at the bottom of the swing if he pushes off with a speed of

186. ## Math

The digits 1,2,3,4,5,6,7,8,9 are used to form four two-digit prime numbers, with each digit used exactly once. What is the sum of these four primes

187. ## physics

Bob heads out into a lake at an angle of 30 with respect to the shore. If his boat is capable of a speed of 3.3 m/s, how far from land will he be in 9 min and 46 s ? Answer in units of m

188. ## math

Brandon is reading a book Flatland and notices that the product of the numbers of the two pages his book is open to has a units digit of 6. What is the units digits of the sum of the two pages numbers?

Changing sentences for complex sentences 1.The stray cat took refuge in an old cardboard box to keep warm. 2. Some students find it difficult to make the transition to a new school 3. Jesus suffered from persecution due to his religious beliefs.

190. ## Math

Find all values of x, 0

191. ## physics

A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 30.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

192. ## College Physics

College Physics- Inertia? Find the moment of inertia about each of the following axes for a rod that is 0.300 in diameter and 1.60 long, with a mass of 5.00×10−2 . How do you find this ? I know how to find the perpendicular and end . but this? About an

193. ## Chemistry

Calculate the concentration of an acetic acid solution prepared by mixing 13.5mL of 10.0M acetic acid with 250.0mL of .15M NaCl solution.

194. ## physics

Find moment of inertia of a disc?

195. ## psychology

Can you help reccomend a good theorist and theory to type an 8 page report to find journal articles as well. I was thinking possibly Freud psychoanaylis theory or maslow hoistic dynamy theory thanks

196. ## Algebra

What is the additive inverse of -2^5?

197. ## maths

Let ABC be a triangle in the plane. Find circles C0;C1; : : : ;C6 such that Cj has exactly j points in common with the boundary of ABC (this \boundary" consists of the line segments AB, BC, CA). Is it possible to find a circle C7 with 7 points in common

198. ## Astronomy

A polar satellite, in a low Earth orbit passing over both poles, makes 16 orbits each day. Viewed from Earth, how far apart in longitude are its consecutive passes over the equator?

199. ## math

At a fourth of July sale, Wanda bought a table marked for 30% off. What was the original price if Wanda paid only \$84?

200. ## S.S

In which battle did the Americans win their first victory over the British? a. Lexington b. Boston c. Charleston d. Concord

201. ## math

Let s be the sum of ten consecutive integers and let p be their product. Explain why the units digit of P-S must be 5.

202. ## math

1/5 divided by 3/10 ?? need asap thanks :)

203. ## math

- 5/8 divided by 3/4 the negative sighn is in the middle of the 1 and 5

204. ## English

9.Raphael has been practicing karate since the age of ten helping:has been main:practicing 10.Your hard work will not be wasted helping:will be main;wasted

205. ## S.S

The general purpose of the Continental Congress was to ________ a. write a new constitution for America. b. unite the colonies in their opposition to British policies. c. draft a treaty between the colonists and the French. d. decide what to do with new

206. ## Math

Find all values of x, 0

207. ## Math

Find all values of x, 0

208. ## Math

Find all values of x, 0

209. ## English

The US has laws that (restrict,waylay) the numbers and kinds of immigrants allowed to enter this country restrict? By the time you are old enough to enter the workforce many (vocations sages) that are important today may not even exist anymore vocations?

Import exclusives Ltd. received an invoice dated June 28 from Dansk Specialties of Copenhagen with terms 5/20, n/45: 100 teak trays at \$34.30 each; 25 teak ice buckets at \$63.60 each; 40 teak salad bowls at \$54.50 each. All items are subject to trade

211. ## Precalc/Trig

Find all values of x, 0

212. ## math

45 divide by 9 + m x 3 = 23? Help??

213. ## math

what is 1/5 divided by 3/10 simplified ? i need this asap !!! by today

214. ## chemistry

How many grams of phosphoric acid can be made from 200 g of dichromate and 150 grams of hypophosphorous acid? (Performed in an acidic solution, Chromium III is one of the products)

215. ## Chemistry

What electron transition in a hydrogen atom, ending in the orbit 5, will produce light of wavelength 3040 ?

216. ## Calculus

How do you go from ln(x^10)+e^ln(x) to 10ln(x)+x

217. ## math

how to find monthly salary

218. ## Math

The ages in years of the houses on Kelly’s block are 20, 26, 11, 2, 28, 18, 2, and 27. Find the mean age of the houses. Find the median age. Find the mode. Which measure(s) would you use to represent the ages of the houses? Explain

219. ## math

Suppose the U.S. federal debt was \$9,400,000,000,000. Let's say that the decision was made to reduce the debt by \$10 million per day. How long would it take to pay off the debt at this rate? (Round your answer to the nearest year.)

220. ## math

you can add 20,26,11,2,28,18,2,27 and divide by number of numbers

221. ## math

simplify the fraction - 104/320 the negative sighn is in the middle not on top or bottom what is the answer ?

222. ## math

what is true of all values of x that will make divisible 2*x by6

223. ## math

Angela practices her long jump before a big track meet. At the beginning of the week ,she jumps 1.56 meters and at the end of the week she jumps 1.63 meters .How much farther did she jump at the end of the week than at the beginning of the week answers

224. ## math

john worked from 8;15 to 2;30 from monday to friday if he is paid twenty four dollars per hour calculate his monthly salary please help me

225. ## Math

What is the scientific notation of 95? Please give a simple explanation! Thanks :)

226. ## CHM

Some of the cyclohexane solvent vaporized during the temperature versus time measurement. Will this loss of cyclohexane result in its freezing point being recorded as too high, too low or unaffected? Explain. Please someone explain this to me I don't

227. ## Physics

These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total

228. ## physics

An 800 N gorilla swings from vine to vine. As the gorilla grabs a new vine, both vines form an angle of 30o with the vertical. What is the net force on each vine?

229. ## Algebra 2

The Denominator of a fraction exceeds the numerator by 4. When 3 is added to both the numerator and denominator, the fraction becomes 4/5. Find the fraction.

230. ## math

In order to travel from Valley town to mountain City, you have to travel 1 3/4 part way and 2 1/5 miles from partway to mountain city . what is the total distance that you travel? A. 3 4/9 B. 3 17/30 c. 3 19/20 d. 4 miles * need answer asap

231. ## direct an inverse variation

The number of books checked out from the library varies directly with the number of book reports assigned. There were 3375 books checked out when there were 225 book reports assigned. How many book reports have been assigned if there are 13,500 books

232. ## chemistry

how are the elements in a pair of isotopes the same? how do they differ? And also if you know anything about the atomic structure phrase apeman i could use some serious help right now i have a test tommoro and i cant remember all the material

What is the scientific notation of 95? Please give a simple explanation! Thanks :)

234. ## math

-3/8 times -4/9

235. ## geography

Is this correct? The Caribbean Sea is the second largest sea in the world that is south of cuba.

236. ## Fashion and fabrics

what is dispossal of fllness?

237. ## Physics

Two boys of the same mass, 45 kg, are on a playground merry-go-round that has a diameter of 4.0 meters. Both boys are at the very edge of the ride. One boy stands with the coefficient of friction between his shoes and eh ride being .45 whereas the other is

238. ## math

how many 2 inch pieces can be cut from a 10 foot bar

239. ## physics

On a playground slide, a child has potential energy that decreases by 1000 J while her kinetic energy increases by only 900 J. How much energy is missing and where did it go?

240. ## Math Help!

What is the scientific notation of 95? Please give a simple explanation! Thanks, sorry i keep posting this question!

241. ## Physics,Question ,Solved but about Units?

These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total

Changing sentences to COMPLEXS sentences. 1. The drought caused deprivation of food and clean water in the town 2. Many people can interpret things in a way that you didn't mean 3. The book on Ancient Greece gave me some insight as to what their life was

243. ## math

5 3/100 into a decimal simplest form

244. ## English

World War II was a truly (global pacifist) struggle, fought in all parts of the world by people of every race and background global? She is never bored because she has great (enigma diversity) of interests ranging from folk dancing to mathematics

245. ## P

Calculate the magnitude of the gravitational force exerted on a 1,405-kg satellite that is a distance of two earth radii from the center of the earth.

246. ## physics

f M and m are particles connected by light inextensible string. M is held at center and rotated about horizontal axis as M is in equilibrium.What is torque ABOUT ITS CENTER

247. ## Physics

A conical pendulum is formed by attaching a ball of mass m to a string of length L, then allowing the ball to move in a horizontal circle of radius r. 1. Find an expression for the tension T in the string. (Express your answer in terms of the variables L,

248. ## math

crusty bought balloons at 5 for \$1 and sold them 3 for \$1. if his profit from selling balloons was \$20, how many balloons did he sell? 1- how much did crusty make for every balloon? 2- what open sentence (equation) would we wite to solve this?

249. ## maths

A chemical engineer designed a 625 ft long tailings channel to have a rhombus cross-section that is 9.5 ft deep, with walls sloping at an acute angle of 44„a. A contractor placed a bid to excavate the canal at \$195/cubic yard plus 20% profit. What was

1. Who invented the caravel, or the first ship to be able to sail against the wind? (1 point) the Portuguese the Spanish the French The Vikings 2. What was the first country to secure a trade route to Asia around the Cape of Good Hope? (1 point) Spain

251. ## Math

"All Items 20% Off Marked Price" is a sign at a local golf pro shop. Create a function and then use it to determine how much one has to pay for each of the following marked items: a \$9.40 hat, a \$13 umbrella, a \$65 pair of golf shoes, a \$12.60 golf glove,

252. ## English

Find the word that means the same or almost in parenthesis in this story A range of factors (Motivated) immigrants to leave their homelands to come to America. Many sought to escape poverty or prejudice. Some wanted to follow dreams, such as promises of

253. ## calculus

Make a singn diagram for the derivative of the function f(x)= (x-1)^4

254. ## math

A regular triangular pyramid has an altitude of 15.0 m and the base is 8.00 m on a side. Find the area of a section made by a plane parallel to the base and 8.00 m from the vertex.

255. ## math

This is the Crailsheim water tower in Baden-Württemberg, Germany. Its construction was completed in 1912. The base of the tower is a graduated cylinder about 19.2 m high with a diameter of 11.5 m at the base and 8.1 m at the top. a)The spherical tank

256. ## Calc 3

The DNA molecule has the shape of a double helix. The radius of each helix is about 10 angstroms (1 Å = 10−8 cm). Each helix rises about 34 Å during each complete turn, and there are about 2.9 × 108 complete turns. Estimate the length of each helix.

257. ## Chemistry

Most of the matter in the universe is of which element? How and where do elements more complicated than this form?

258. ## Chemistry

Write the molecular equation for the combination of aqueous solutions of sodium chloride and silver nitrate. Enter your answer as the sum of all coefficients.

-0.1

260. ## English

Complete the sentence by writing the correct form of the verb shown in parenthesis. "It has _______," Martin said matter-of-factly. (burst)

261. ## Grammar

Which is correct? British powerful army Or British's powerful army I think the first one is right.

262. ## Health care Information System

Analyze the points at which information is collected during an in-patient encounter, determine the most likely point (or points) at which mistakes in that collect could occur, and recommend steps to avoid the mistake you identified.

263. ## physics

The rubidium isotope 87Rb is a β emitter that has a half-life of 4.9 x 1010 y that decays into 87Sr. It is used to determine the age of rocks and fossils. Rocks containing the fossils of early animal have a ratio of 87Sr to 87Rb of 0.004. Assuming that

264. ## Physics- Help! Due soon!

Two packing crates of masses m1 = 10.0 kg and m2 = 5.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.00 kg crate lies on a smooth incline of angle 40.0°. Find the acceleration of the 5.00 kg

265. ## Chemistry

if a student starts with 3.000 g of lead(II) carbonate for the first reaction and all other reagents are added in excess, what is the theoretical yield of lead(II) chloride solid?