# Questions Asked onSeptember 26, 2010

1. ## chemistry

20) The ideal value of i (van't Hoff factor) for (NH4)3PO4. A) 2 B) 5 C) 4 D) 3 E) 1 I know the answer but how are problems like this figured out?

2. ## physics

a 1500 kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered to the engine?

3. ## maths

a light house flashes every 56 seconds. Another lighthouse flashes every 40 seconds. At 9 p.m. they both flash t the same time. What time will it e when they next both flash at the same time?

4. ## chem

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 (formula weight = 164 g/mol) in 115 g of water? The molal freezing point depression constant for water is 1.86 °C/m. whats wrong with my answer: molal: 0.069 moles

5. ## general chemisty

Calculate the freezing point of a solution of 20.0 g methyl salicylate, C7H6O2, dissolved in 800 g of benzene, C6H6. Kf for benzene is 5.10°C /m and the freezing point is 5.50°C for benzene. A) -1.05°C B) 1.05°C C) 4.45°C D) 6.54°C

6. ## Pre-Calc

A rectangular package to be sent by a delivery service can have a maximum combined length and girth (perimeter of a cross section) of 120 inches. a. Show that the volume of the package is V(x)= 4xsquared(30-x) b. Use your graphing calculator to find the

7. ## CHemistry

The concentration of sodium chloride in an aqueous solution that is 2.23 M and that has a density of 1.01 g/mL is __ % by mass.

8. ## college chemistry

How many total moles of ions are released when the following sample dissolves completely in water: 5.15x10^-3 g Ca(NO3)2

9. ## CHEMISTRY

45) George is making spaghetti for dinner. He places 4.01 kg of water in a pan and brings it to a boil. Before adding the pasta, he adds 58 g of table salt to the water and again brings it to a boil. The temperature of the salty, boiling water is _ _ _ _

10. ## math

the ratio of the distances a 7-iron and a 5- iron will dirve a golf ball is 5 to 6. if a golfer averages 153 yards with a 7- iron, how far should he averages with a 5-iron?

11. ## Chemistry

A reaction of the form aA-----products is second-order with a rate constant of 0.225 L/(mol/s). If the initial concentration of A is 0.293 mol/L, what is the molar concentration of A after 35.6 secs?

12. ## Physics

A football player, starting from rest at the line of scrimmage, accelerates along a straight line for a time of 1.5 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.4 m/s2. With this acceleration, he

13. ## Statistics

12.22 A regression was performed using data on 16 randomly selected charities in 2003. The variables were Y = expenses (millions of dollars) and X = revenue (millions of dollars). (a)Write the fitted regression equation. (b)Construct a 95 percent

14. ## chemistry

How many grams of sucrose,C12H22O11 must be dissolved in 750.mL of water to prepare a 0.250 molal solution?

15. ## chemistry

How many grams of lead(II) iodate, Pb(IO3)2 (formula weight = 557.0 g/mol), are precipitated when 3.20 × 102 mL of 0.285 M Pb(NO3)2(aq) are mixed with 386 mL of 0.512 M NaIO3(aq) solution? The unbalanced equation of reaction is: Pb(NO3)2(aq) + NaIO3(aq)

gk bisects

17. ## CHEMISTRY

A solution is prepared by dissolving 15.0 g of NH3 in 250 g of water. The density of the resulting solution is 0.974 g/mL. The mole fraction of NH3 in the solution is __________. A) 16.8 B) 0.940 C) 0.0597 D) 0.922 E) 0.0640

18. ## chem

The concentration (M) of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C2H6O is ?????? M. The density of the solution is 0.79 g/mL. A) 21 B) 0.93 C) 6.0 × 10-4 D) 1.72 E) 0.58

19. ## English

Posted by rfvv on Saturday, September 25, 2010 at 9:16am. 1. Yesterday was his 100th day. 2. one hundredth day 3. a hundredth day (How can we read '100th day'?) English - Writeacher, Saturday, September 25, 2010 at 9:41am Do you mean his 100th birthday?

20. ## algebra

solve for x: 2x+3y=8

21. ## algebra with pizazz pg 40 riddle

what is the riddle answer??? missed lesson don't get it!!! please help in diar need!!!! question is... why do girls like guys who wear shirts with eight buttons?

22. ## calculus

At what points does the helix r = sin(t), cos(t), t intersect the sphere x 2 + y 2 + z 2 = 37? (Round your answers to three decimal places. Enter your answers from smallest to largest z-value.)

23. ## chemistry

A 1.500-g sample of a mixture containing only Cu2O and CuO was treated with hydrogen to prduce 1.252 g pure copper metal. Calculate the percentage composition (by mass) of the mixture.

24. ## Astronomy

Which of these gasses are outgased by our volcanic eruptions? a)oxygen, methane,ammonia b)carbon dioxide, water vapor, oxygen c)ammonia, water vapor, oxygen d) water vapor, methane, carbon dioxide e)helium, carbon dioxide, methane

25. ## Math - Instantaneous and average rates of change

a) Describe a graph for which the average rate of change is equal to instantaneous rate of change for its entire domain. Describe a real life situation that this graph could represent. b) Describe a graph which the average rate of change between two points

26. ## psy

Looking to increase the profits of his lemonade stand, Johann doubled the price of a cup of lemonade from 25 cents to 50 cents. This clearly shows Johann’s lack of business sense, for now he’ll almost certainly sell fewer cups at the new price and

27. ## Math

Write each of the fractions in their decimal form and then arrange them from the smallest to the biggest. 2/3 3/5 31/50 67/100

28. ## C hemistry

An unknown compound contains only carbon, hydrogen, and oxygen . Combustion of 2.50 g of this compound produced 3.67 g of carbon dioxide and 1.50 g of water. What is the empirical formula of a substance that contains 8.33×10−2 mol of carbon, 0.167 mol

29. ## General Chem.

FeCo3 Calculate the mass percent composition of iron for the third one of these iron ores.

30. ## Statistics

How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling distributions? A. They help us to measure or estimate of the likelihood of a certain statistic falling within the class bounds. B. They

31. ## Chemistry

The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 degrees Celsius and 100.0 torr at -6.3 degrees Celsius. What is delta Hvap of chloroform?

32. ## psychology

describe why it is important to consider each domain in the study of adult development

33. ## Physics

A helicopter is lifting off from the ground and is moving vertically upward. The graph shows its vertical velocity vy versus time. How high is the helicopter after 7 s have elapsed?

34. ## Physics - Inelastic Collision ( check + help)

A billiard ball of mass 0.55kg moves with a velocity of 12.5m/s towards a stationary billiard ball of the identical mass and strikes it with a glancing blow. The first billiard ball moves of at an angle of 29.7deg clockwise from its original direction,

35. ## Chemistry

How many molecules are in 2.6 grams of H2O?

36. ## physics

A stone thrown off a bridge 20 m above a river has an initial velocity of 12 m/s at an angle of 450 above the horizontal. a. What is the range of the stone? b. At what velocity does the stone strike the water? (magnitude and direction)

37. ## Physics

Emily challenges her husband, David, to catch a \$1 bill as follows. She holds the bill vertically, with the center of the bill between David's index finger and thumb. David must catch the bill after Emily release it without moving his hand downward. If his

38. ## Physics

Two very small spheres are initially neutral and separated by a distance of 0.50 m. Suppose that 2.50 x 10^13 electrons are removed from one sphere and placed on the other. What is the magnitude of the electrostatic force that acts on each sphere?

39. ## Chemistry

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of Cl- in this solution is __________ M. can someone help me? how do i get to M?

40. ## statistics

A student takes a 20-question, true/false exam and guessed on each question. Find the probability of passing if the lowest passing grade is 15 correct out of 20.

41. ## Chem

(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109? Thanks

42. ## Math

Evaluate the following when x=-3, if possible. (a)-x (b)/x/ (c)-x^2 (d)-(1+x)

43. ## CHEMISTRY

THE FOLLOWING SOLUTIONS AREMIXED TOGETHER: 121mL OF 1.54 M AgNO3 AND 45mL OF 1.07 M K2SO4 CALCULATE THE MOLAR CONCENTRATION OF Ag+ IONS IN THE FINAL SOLUTION

44. ## Physics

you push with a 40-N horizontal force on a 2-kg box of coffee resting on a horizontal surface. The force of friction on the box is 12 N. Show that the acceleration is 4 m/s^2

45. ## Psydag--stat

An insurance company insures a person's antique coin collection worth \$20,000 for an annual premium of \$300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?

46. ## english

what are direct and inderect objects?

47. ## physics

write down the value of 3.65x10^-6g in kg write down the value of 62microseconds in seconds write down the value og 6.16x10^-7mm in m please help me with these!! thanks!

48. ## Math

how do I solve this problem. In 1920 the record for a certain race was 445.7 sec. In 1970, it was 44.2 sec. Let R(t) = the record in the race and t = the number of years since 1920. a) Find a linear function that fits the data R(t) = b) What is the

49. ## algerbra 1

Antartica comprises about 10.5% of the total land area on earth. antartica has a surface area of about 5,400,000 square miles. what is the total land area on earth? write an equation and slove.

50. ## social studies

what kind of landform covers the central part of North America

51. ## English 2

1. Which of the following sentences contains an implied metaphor? a. The mall sailboat bobbed about like a cork on the huge ocean b. The wind looked down upon the tiny craft, laughed, and then attacked. c. The battle between wind and boat raged on for an

52. ## accounting

Assignment Please prepare the homework problems in the form of a Word and/or Excel file. Try to use one file to submit your answers if possible and include the questions with your answers. You must show your calculations. A dermatology clinic expects to

53. ## Statistics

A friend calculates a variance and reports that it is -25.0. How do you know that he has made a serious calculation error?

54. ## Physics

Two trucks, 300 km apart, are on a head-on collision course with one another. The first truck is moving at 100 m/s and the other is moving at 50 m/s in the opposite direction. A confused (but swift) fly starts from the front bumper of the faster truck and

55. ## math

vehicle a averges 14 miles per gallon of gasoline and vehicle b averges 36 miles per gallon of gasoline at these rates how many more gallons of gasoline does vehicle a need then vehicle b to make a 1008-mile trip

56. ## Stat

An insurance company insures a person's antique coin collection worth \$20,000 for an annual premium of \$300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?

57. ## math

d^2y/dx^2=1-dy/dx am i allowed to rearrange this to d^2y/dx^2-dy/dx=1 and say this is a linear ODE

58. ## algebra

solve for y: -6x + 2y = -14

59. ## science

A bat flying in a cave emits a sound and receives its echo 0.4 s later. How far away is the cave wall? Assume the speed of sound to be 340 m/s. Answer in units of m.

60. ## English

Here are some sentences on Robinson Crusoe I'd like you to check. Thank you. 1) After rowing for seven kilometres, a huge wave took the boat and threw them into the air like a ball. 2) Robinson fell into the sea, water filled his mouth (his mouth was

61. ## Repost-- ms. sue.

how were the first civilizations similar and different? They all had a social hierarchy, and some sort of government. The main type of ecominic income was agriculture-i think-. That's all I know

62. ## sunshine math

use each of these digits one time: 2, 4, 6, and 8, to produce the answer "14"

what is the unit price of a 12 oz.bag of doritos on sale for 3.oo dollars

64. ## Science

Does anyone know where to find facts about iced tea powder? ex. who made it, where did it come from, anything!

65. ## Biochemistry

My professor was saying something about cycling, how it compacts the structure, and how it relates to solubility somehow. He used the example of cyclohexane vs. hexane, but I didn't catch what he said. And then he mentioned proline, which is a cyclic amino

What does it mean that the PC is concerned commodity?

67. ## Math

The total area of three flowerbeds is 8 13/20m². Calculate how much of the garden remains if the whole garden covers 10 squared meters. Please show the working!

68. ## Math Surveying

Need help working this problem. Thanks in advance! 1) A 50-m tape is used to measure between two points. The average weight of the tape per meter is 0.320 N. If the measured distance is 48.888 m, with the tape supported at the ends only and with a tension

69. ## college chemistry

How would you prepare a 250 mL solution of 0.45 M from a stock solution of 5.5 M?

70. ## Math Surveying

Hey, I need help working these problems. Thanks you. 1) A 50-m tape is used to measure between two points. The average weight of the tape per meter is 0.320 N. If the measured distance is 48.888 m, with the tape supported at the ends only and with a

71. ## physical science

what is a unit?

72. ## eighth grade english parts of speech

what part of speech is the word in

73. ## math probelm need serious help!!!

4x-(9-3x)= 8x-1

74. ## physicssss

Ball is thrown vertically upward with a speed of 25.0 m/s. What is it's velocity when it returns to the level from which it had started ? After computations: The ball reaches its highest pt at 32.4 meters. It takes the ball 2.55sec to reach its highest pt.

On this day in 1789, the Supreme Court was established. Using resources in the classroom, learn five (5) facts about the Supreme Court’s roll in our nation’s government and summarize them in your own words. Can someone help me with this it's for my

76. ## Physics

As your plane speeds down the runway during takeoff, you decide to determine the acceleration of the plane. you take your yo-yo and note that when you suspend it, the string makes an angle of 22 degrees with the vertical. What is the acceleration of the

77. ## • Use at least five adverbs and five adjectives to

Lottery ticket movie review. Winning the lottery what would you do with \$370million dollar lottery ticket? In this movie Bow wow that plays the role as Kevin a nice young man working to help support his grandmother keeps to himself when he runs into some

78. ## CHEM

what is the charge of a PHOSPITE ? and how do i write it?

79. ## Geography

Where can I find a map of the North and South Poles when it is always night time for half a year?

80. ## psych

what does it mean to be empirical in the pursuit of knowledge? how dies this relate to the scientific method?

81. ## algebra

15000(1+0.07/2)^2*4

82. ## Physics

The velocity vefot of a ball is v(t)=-3x+4y at any time. Its initial position is r=12x-4y. The components of the velocity vector are in m/s and the components of the position vector are in meters. The symbols x and y are the unit vetors in x and y

83. ## poer point

To enhance the movement of graphic objects and bulleted text lists in your slideshow, you should use A. layouts. C. transitions. B. animation. D. wizards

84. ## trig

The angle of elevation from the top of a house to a jet flying 2 miles above the house is x radians. If d represents the horizontal distance, in miles, of the jet from the house, express d in terms of a trigonmetric function of x.

86. ## Social Studies

What about the resources? Thank u

87. ## algerbra 1

2/n=14/n+30 can some one help me?

88. ## chemistry

using only words and no numbers how would i explain the steps necesarry to show how many kilograms are in a milligram? thanks :D

89. ## Math

What is the domain of (sec(x)-1)/(x^2)?

90. ## 11th phyics

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s

91. ## Art

Why is important for children to draw pictures of things that scare them (otherwise what does the child learn from this?

92. ## 1th phyics

A car traveling at 7.5 m/s accelerates 3.4m/s2 to reach a speed of 15.0 m/s. How long does it take for this acceleration to occur?

93. ## acct.

how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of \$250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks

94. ## chemistry

how many moles of oxygen (molecule) are required for complete reaction with 2.1080 moles of iron?

95. ## Biology Chemistry Part

I'm trying to calculated the rate of reaction In this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into it, I then poured in 30 ml of original enzyme solution (I believed we used cold potato juice or something), I then took a piece

96. ## Physics

Highway safety engineers build soft barriers so that cars hitting them will slow down at a safe rate. A person wearing a seat belt can withstand and acceleration of -3.0 102 m/s2. How thick should barriers be to safely stop a car that hits a barrier at 106

97. ## math

1-AND PRODUCTION sum of roots of the equation :X²-X-6=0 2-FOR what values of A the equation has no solution ax ² +3 x-7 = 0 3-For what values of x the equation has 2 solution X²-X+C=0 4-Solve the equation (X-1)²-4=0 5-Solve the equation a)2/2

98. ## math

Is this right? smallest to biggest 0.62 31/50 0.67 2/3 0.67 67/100 0.6 3/5

99. ## General Chemistry

The burning of the magnesium becomes uncontrolled (its burns brightly). Oops! How will this procedural error affect the reported mole ratio of magnesium to oxygen in the analysis? Explain. Mass of crucible and lid 23.96g Mass of Sample (Mg) .1018g Heating

100. ## Algebra

Could someone help me with this question Simplify the rational expression. (3x^2y+9xy^2-12y^3)/(36x^3y-27x^2y^2-9xy^3)

101. ## chemistry

A benzene solution of a nonvolatile solute exhibits a vapor pressure of 90.5 torr at 25 degree C. The vapor pressure of benzene at 25 degree C is 93.9 torr.. what is the mole fraction of the solute in this solution?

102. ## English

Here are some more sentences on Defoe's Robinson Crusoe I'd like you to check. Thank you very much in advance. 1) As he hadn’t eaten anything since the day before, he decided to take off his clothes and swim to the ship to look for food. He tried to get

103. ## English

1. Write a report on your favorite artist. 2. Write a report about your favorite artist. (Are both the same? What is the difference between 'on' and 'about'?)

1/9=a/a+24 I don't get this plez someone HELP

105. ## math

The total area of three flowerbeds is 8 13/20m². Calculate how much of the garden remains if the whole garden covers 10 squared meters. Please show the working.

106. ## Chemistry

What is the corresponding EM wave for: a) 274nm b) 71nm?

107. ## College Chemistry

25.0g of aluminum reacts with 55.0grams of chlorine gas to produce aluminum tetrichloride. Which reactant is liminting and how much product is produced? Al + Cl2 -> AlCl3

108. ## math

Help! i am having trouble finding the order pair for the first pair I have (0,-12), but I am not sure this is correct 9x-4y= -12 and 4y-9x=12

109. ## History

what role did the geography of europe play in the development of and ways of life in these towns?

110. ## Organic Chemistry!!!

pure acetylsalicylic acid has a melting point of 135.0 - 135.5 degreed celsius. what would you expect to happen to the melting point if this was mized as a 50:50 mixture with pure benzoic acid (mp 121 - 122)

111. ## History

Describe the role of guilds in the trade and production of goods. How did trade and commerce grow during the middle ages?

112. ## Enviromental Science

How many cal and K cal are required to evaporate one gram of water at 100 degrees Celcius?

113. ## Math

Can somebody explain to me how the table of value works for Polynomial Functions? :S

114. ## History

Describe the daily lives of medieval, europeans, including their homes, occupations, education, and leisure activities

115. ## physics

please HELP!!! What is the magnitude of the momentum of a baseball (m = 1.450 kg) traveling at a speed of 102 mi/h? Express your answer in SI units. I am unsure where to start

116. ## math

The relationship described below can be modeled using an equation. Identify the variables and write an equation to solve the questions below. Number of subscriptions sold/ pay per wk 5 150 10 200 15 250 20 300 25 350 Sheryl has a part-time job working for

117. ## excell

Which one of the following operations will move you from cell B7 to cell B8 of a worksheet? A. Pressing the right arrow key B. Clicking on the down scroll arrow C. Pressing the Enter key D. Pressing the Page Down key

118. ## statistics

Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the

119. ## History

What problems did medieval towns face? How did medieval europeans attempt to deal with those problems? How did an independant judiciary and common law in England help to protect individual rights?

120. ## Math

1.The square of x is equal to 4 times the square od y. If x is 1 more than twice y, what is the value of x? A) -4 B) -.5 C) -.25 D) .25 E) .5 2.In the xy-coordinate plane, lines L an Q are perpendicular. If line L contains the points (0,0) and (2,1), and

121. ## Algebra 2

How do you factor u^2 - v^2 + 2v + 1?

does anyone know a website where i could find human characteristics of columbus indiana?

123. ## chemistry

explain what is meant by the scientific method

124. ## Biconditional statements

™PQR and ™QRS are supplementary if and only if m™PQR = m™QRS = 90°. true or false if false provide a couterexample

Does anyone know how Columbus Indiana interact with the enivroment?

126. ## Chemistry

Why does molarity depend on temperature?

127. ## chemistry

what fraction of the total mass of an 56Fe atom is due to the electrons?

1.73 x 10^6

129. ## AP U.S. history

what additional safeguards were proposed by thomas jefferson and james madison in the virgina and kentucky resolutions, and what werethe implications of these resolutions with regard to the growth of the centeral government?

130. ## chemistry

What is the empirical formula of a substance that contains 8.33×10−2 mol of carbon, 0.167 mol of hydrogen, and 8.32×10−2 mol of oxygen?

131. ## marketing

______________ is the process of naming broad product-markets and then segmenting these broad product-markets in order to select target markets and develop suitable marketing mixes.

132. ## Biology

The type of cartilage associated with bone function and development is what? I know that the elastic cartilage contains elastin which allows for elasticity and maintains shape of certain structures. Fibro is strong and rigid (strongest of 3) Hyaline

133. ## chemistry

If the total mass of a vehicle is due to 56Fe, what mass of a 1.4 metric ton (tonne) automobile is due to the electrons?

134. ## english

The face of this admired accomplished American papers on postage stamps coins and paper money of the United States. Can you please help me with correct comma placement?

135. ## English

I forgot to include the following sentences which belong to the same summary. Thank you for you help. 1) One day he got to the beach and saw it was covered with human bones. He realized that cannibals had eaten men on his island. He believed that cannibals

136. ## foundation of science

what parts of the ladder corrsponds to the energy level of the atom?

137. ## physics

You are given a vector in the xy plane that has a magnitude of 100.0 units and a y component of -45.0 units. What are the two possibilities for its x component?

138. ## chimistry

what distinguishes one element from another?

139. ## Chemistry

Lead has four stable isotopes. ^204Pb (1.4%), ^206Pb (24.1%). ^207Pb (22.1%) and ^208Pb (52.4%). Find the atomic mass of ^208 Pb given that ^204Pb has an atomic mass of 203.973 amu, ^206Pb has an atomic mass of 205.974 amu, and ^207Pb has an atomic mass of

140. ## Anatomy

A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results how an elevated eosinophil level. Which of the following organisms is most likely to cause her illness? A. Bacteria B. Worm C. Virus D.

-3.5(4a+1.9)

142. ## math

i need to know 1,000 x 340

143. ## world history

what were some racial ideologies from 1500-1830

144. ## Chemistry/physics

Calculate the final temp. of 100g of Ag at 40 C is immersed in 60.0g of water at 10.0 C. SH of Ag is 0.065 cal/g/C SH of H2O is 4.184 J/g/C I can't figure out how to put delta T in the equation when I haven't found it yet :-\

145. ## math

the value, v, of a shopkeepers inventory software program is given by v= -(1)/(3)t+5 where t is the number of years since the shopkeeper bought the program. What is the program worth 9 years after its first year purchased? Plot the point with the given

146. ## Factors

look at the following sentences: 2x7 and 7x3 Are these #s all factors of the same product? Explain your answer.

147. ## accounting

state 5 assumptions underlying cost- volume profit(break-even )analysis

148. ## sculpture

if gianlorenzo bernini's apollo and daphne were to be moved from the galleria borghese in rome where it now stands into the the ufizzi gallery, the most ideal place to install it would be?

149. ## chemistry

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW = 60.0 g/mol) in 39 g of H2O is __________ M. The density of the solution is 1.3 g/mL. i get 8.9 but the practice test says the answer its 6.3

150. ## Statistics

n=1000, bell-shaped Mean - 5,000 ~950 lie +/-100 of 5000 -4900 to 5100 Required 1) Standard Deviation 2) 97.5th percentile value 3) Z-score for 16th percentile

151. ## Chem

(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109? % (c) If the mass of Ag-107 is 106.905, what is the mass of Ag-109? amu I really need help. Can u say the answer then explain how you got it? Thanks:)

152. ## English

Why is silent reading good for children during class?

153. ## com 155

Write a 100-word passage to Susan Anker, the author of the course’s textbook, in which you describe five details from her book that are good and five details about the book that are written well.

154. ## English

As promised, I just included the first five sentences I wasn't sure of. 1) One day he got to the beach and saw it was covered with human bones. He realized that cannibals had eaten men on his island. He believed that cannibals ate other men because they

155. ## chemistry

what experimental evidence led Thomson to conclude that cathode rays were negatively charged?

156. ## math factoring

Factor each of the following expressions: (a)5x-3x^2 (b)25-x^2

157. ## chemistry

If silver chloride is not dry when its mass is determined, will the calculated percent of silver in the alloy be too high or too low?

158. ## math

why do we use reciprocal in math?

159. ## Statistics

If I deal you one card from a standard deck of 52 and it is a face card, I will give you a \$5.00 bill. There are 12 face cards. There is one catch: You have to pay me something to play this game. How much would that be if the game is to be fair?

160. ## english

Is this sentence correct? To truly help a patient, I should allow them decide their own choice by letting them hear different life stories.

161. ## math

Michel’s class had 4 A’s, 10 B’s, 13 C’s, 8 D’s, and 2 F’s. (a) What is the ratio of A’s to B’s? (b) What is the ratio of F’s to total students?

162. ## physics

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 3.80 m to the north, 1.80 m northeast, and 1.00 m at 25.0° west of south. Starting at the same initial point, an expert golfer could make the hole in what

163. ## physics

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 23.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

164. ## Physics

An artillery shell is fired with an initial velocity of 300 m/s at 65.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 37.5 s after firing. What are the x and y components of the shell where it explodes, relative to its firing

165. ## ap history

one reason for the development of indenture employed in the early colonial period was

166. ## english

Is this correct? nurses do have feelings as they empathize with the patients’ conditions

167. ## math

the value, v, of a shopkeepers inventory software program is given by v= -(1)/(2)t+3 where t is the number of years since the shopkeeper bought the program. What is the program worth 6 years after its first year purchased? Plot the point with the given

168. ## CHEM

How many significant figures does 79,500 have?

169. ## math

Describe three strategies for estimation.

170. ## World History

How did civilized culture survive the rise and fall of regional states?

do i use is / are invited? You and a friend or 2 is invited to my Garage Sale.

172. ## chemistry

Hydrogen cyanide, HCN, can be made by a two-step process. First, ammonia is reacted with O2 to give nitric oxide, NO. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) Then nitric oxide is reacted with methane, CH4. 2 NO(g) + 2 CH4(g) → 2 HCN(g) + 2 H2O(g) +

173. ## chemistry

why is temperature of H2O2 measured in the graduated cylinder?

174. ## physics

A car is driven 165 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?

175. ## algebra

solve 9/10(3x+2x)+2 >_ 23

176. ## Algebra

Could someone help me with this question Simplify the rational expression. (3x^2y+9xy^2-12y^3)/(36x^3y-27x^2y^2-9xy^3)

177. ## Biology Chemistry Part

I'm trying to calculated the rate of reaction In this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into it, I then poured in 30 ml of original enzyme solution (I believed we used cold potato juice or something), I then took a piece

178. ## Science

Is rubbing alcohol a pure substance or a mixture?

179. ## algebra

How do you graph this liear inequality 2y greater than equal to 4x-6

180. ## physics

Two charged spheres are 5.25 apart. They are moved, and the force on each of them is found to have been tripled. how far apart are they now?

181. ## math

Average truancy per student is 8 days per semester with a standard deviation 2.2 and a population of 250 students. a. What percent of the population is truant more than 9 days? b. What percent of the population is truant less than 3 days? c. What percent

182. ## Science

what is the mixture that is formed when one subtance dissolves in another called?

183. ## physics

Two charged spheres are 5.25 apart. They are moved, and the force on each of them is found to have been tripled. how far apart are they now?

184. ## medical billing and coding

explain how evaluation and management (EM) codes are grouped

185. ## Chemistry

How is the average mass of a penny related to average atomic mass?

186. ## Science

What is the term that means "not able to be dissolved in a particular substance?"

187. ## drawing

canu show me how to do scribble hatchimg

188. ## statistics

School 1 Statistics: Average truancy per student is 8 days per semester with a standard deviation 2.2 and a population of 250 students. a. What percent of the population is truant more than 9 days? b. What percent of the population is truant less than 3

189. ## MATH

Which term(s) describe(s) this system? 4x + y = 8 3x – 2y = –5 dependent consistent and dependent consistent and independent inconsistent

190. ## College Physics

a horizontal speed of 15.8 m/s and a vertical speed 10.0 m/s upward. What is the vertical speed 1.12 s later?

191. ## Physics

At time t = 0, a hockey puck is sent sliding in the +x direction over a frozen lake, directly into a strong wind. Figure 2-13 gives the velocity v of the puck versus time, as the puck moves along a single axis. (The time axis is marked in increments of 1.0

192. ## Macroeconomics

What are the key elements of the scientific method and how dose this method relate to economic principles and laws?

What percent is 1.25 of 82

194. ## com/155

include a discussion of sentence variety and the rhythm of the author's writing about Individuals can be denied credit for a number of reasons.

195. ## Math homework

- 3 3/7ths + - 14 3/4ths how would i solve this?

196. ## english

How do I make a title Page??? Thanks :)

asked by I NEED HELP NOW!!:)
197. ## chemistry

what fraction of the total mass of an 56 Fe atom is due to the electrons? The mass of a proton is 1.673 x10-24 g, of a neurton 1.675 x 10-24 g, an of an electron 9.109 x 10-28g.

198. ## college english

I have to revise sentences to eliminate illogical or overused coordination. Is the following sentence correct? Thanks! Fencing equipment includes a mask, a padded jacket, and a glove, and one of three weapons-a foil,epee, or saber-and a fencer's technique

199. ## algebra

how to clearing decimals multiplying by 10

200. ## economics

out of the four economic market models which is the best market model and which is the worst

201. ## Pre-calc

A cardboard box with an open top and a square bottom is to have a volume of 45 ft3 . Use a table utility to determine the dimensions of the box to the nearest 0.1 foot that will minimize the amount of cardboard used to construct the box.

202. ## algerbra 1

p+15/42=p-5/14

203. ## World History

how were the first civilizations similar and different?

204. ## Physics

At time t = 0, a hockey puck is sent sliding in the +x direction over a frozen lake, directly into a strong wind. Figure 2-13 gives the velocity v of the puck versus time, as the puck moves along a single axis. (The time axis is marked in increments of 1.0

205. ## Calc

Use a table of values to estimate the value of the limit. lim (tan 3x/tan 5x) x--> 0 I have no clue what to do. Could someone please explain how to go about this problem.

206. ## american literature

do you know anything about the crucible. i need help with this proect asap.

207. ## Math Surveying

Hey, Need some help working these 3 problems. I have the answers but I'm having problems working them. Thank you in advance. The slope measurement between two points is 25.333 m and the slope angle is 1°50. Compute the horizontal distance. A distance of

208. ## statistics

Find z such that 20.3% of the standard normal curve lies to the right of z. 0.831 0.533 -0.533 -0.257 0.257

209. ## Algebraic propertie help?

(-6+1)+7 Can be written the same was as =6+(1+7) But.. what propertie would that be? as in inverse, communative, etc.. I really don't get this

210. ## MATH

Grady has designed a wooden storage cabinet for his CD's amd DVd's. The cabinet has wooden door that can be closed. It is in the shape of a rectangular prism. a) calculate volume of rect. prism. So I go l*w*h? b? Grady has decided to keep the length and

Research the Volkswagen Group website. Using your research findings from the Library and the Internet, develop both an EFAS (External Factors Analysis Summary) table and an IFAS (Internal Factors Analysis Summary) table. The tables are to be submitted in

212. ## history

how were the differences important to the international state of affairs in 1450?

213. ## ghemistry

which indicator is more reliable in the titration of H3PO4 with NaOH using methyl orange and phenolphthalein as indicators

214. ## CHEM- KINETICS

this is a text book question that i cannot figure out. the decomposition of dimethyl ether at 510 degrees is a first-order process with a rate constant of 6.8*10^-4. (CH3)2O(g)--> CH4(g) + H2(g) + CO(g) if the partial pressure of (CH3)20 is 18kPa, what is

215. ## ap history

one reason for the development of indenture employed in the early colonial period was A.a desire to produce traffic slaves B.parliaments refusal to allow skilled craftmen to emigrate C.the lack of trained domestic help on the large patroon estates along

216. ## Calculus

How would you find the limit of (secx-1)/(x^2) as x goes to 0 algebraically?

217. ## Statistics

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 amount of variation. Explain how you produced your answer. a. 17 29 12 16 11 b. 22 18 23

f=5gh for h

219. ## Marketing

Describe how companies have used marketing data to target wants and need.

220. ## college english

I have to revise sentences to eliminate illogical or overused coordination. Are the following sentences correct? Thanks! The object of fencing is to be the first to touch the opponent five times, and a "president," who is sometimes assisted by a number of

221. ## ap history

when did american economic institutions began to be shaped in a capitalist framework? A.during the colonial period B.during the federalist era C.during the jacksonian era D.during the civil war E.during the late 1890s

222. ## muah

explain why the name of the insect millipede doesnt follow SI conventions? please help me i cant find this any where in my text. I would be very happy if you did help. :D

223. ## Statistics

A statistics practitioner determined that the mean and standard deviation of a data set were 120and 30, respectively. What can you say about the proportions of observations that lie between each of the following intervals? a. 90 and 150 b. 60 and 180 c. 30

224. ## math

how do you multiply a mixed number × a fraction!? like 2 4/5 × 1/3 or 2 2/3 ×1/6

225. ## economics

out of the four economic market models : competitive market, monopoly market, monopolistic competition and oligopolywhich is the best market model and which is the worst

226. ## Math Graphing

x^3 < 3x^2 would become x(x^2-3x) then how would I graph this?

227. ## Check Statistics

Calculate the first, second, and third quartiles of the following sample. 2 2 3 3 4 4 4 5 5 5 7 7 8 9 10 Are my answers correct: 25th percentile = 3 50th percentile - 5 75th percentile = 7

228. ## ela

Below the main level, we have a large playroom. What part of speech is below?

229. ## Random?

When students do a drawing in class, why is it important for them to share their piece of work with the rest of the class? (why is this good for the student)

230. ## Geometry

I have this much so far (1+x)/9 = 2/5 or x = 13/5 = 2.6 ft I am unsure of how to work out the rest of the problem. A wooden board is placed so that it leans against a loading dock to provide a ramp. The board is supported by a metal beam perpendicular to

231. ## English Grammar

Essay-Women Reservation

232. ## algebra

solve for g1: F = kg1g2/r2

233. ## comp

compare a smart UPS to one that does not interface with a PC but otherwise has similar ratings

234. ## math

A video game store charges a monthly membership fee of \$7.50 but the charge to rent each movie is only \$1.00 per movie. Another store has no membership fee but it costs \$2.50 to rent each movie. How many movies need to be rented each month for the total

235. ## Physics

You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 113 m/s. How much time does it take for the impulse, which travels a distance of 1.50 m, to reach your brain?

236. ## Science

Make the necessary conversions between ordinary decimal form and standard exponential notation. a) 56934 = ?

Learning activities currently used- exploring the web resources read widely accept feedback Leaning activities that needs improvement- reshape ideas follow intution

238. ## textile technology

What are the safety rules in textile technology?

239. ## science

What is the chemical name for Polyurethane and what does it look like at it's resting state?

240. ## chemistry

what flaws exist in Dalton's model of the atom?

241. ## physics

3 miles to centimeters will someone help with that problem? and tell me how to show my work with all the multiplication and division. like 1 mile over 3 centimeters or whatever (random numbers) but will you show me how and what the answer is please

242. ## English

Can you help me checked if the following sentences are grammatically correct? Thank you very much. 1) On what condition can Shylock take a pound of flesh from Antonio? On condition that he doesn't drop(?) a single drop of Antonio's blood. 2) Why can have

I'm sorry for the inconvenience but im all new to this school stuff but i need help with giving an examples of those two discussions guestions.

244. ## physics

what is your age in seconds? this is a conversion problem. someone help please with all the multiplication and division... very confused. THANK YOU

245. ## English/General Knowledge

What are some of the social issues in today's society? I'm supposed to make an Advocacy speech to effect positive changes on a social issue.

246. ## statistics

13) You are told that the mean height of trees around the Physics building is 8 feet tall, with a standard deviation of 1.5 feet. Which is the most appropriate statement you can make, based on this information?

247. ## muah

using only words and no numbers how would i explain the steps necesarry to show how many kilograms are in a milligram? thanks :D

bikes tyre filled with air pressure=6 atm =6x10^5 Pa on tempreture 20c = 20+273 = 293 K.. we used the bike on tempreture at 45 c the volume increase by 2%. find the new volume?PV=nRT

249. ## statistics

In a standard Normal model, what value of z cut off the region described as the lowest 1.5%?

250. ## Europe

What role did the geography of Europe play in the development of and ways of life in these towns?

251. ## Math

Two sides of a triangle are x + 2cm and 2x-3cm. If the perimeter is 5x + 7cm, what is the third side?

252. ## physics

if four of length on a real home is represented by one inch on a scale model of the home, what legth on the scale model would represent one foot on the real home?

253. ## stats

Some IQ tests are standardized to a Normal model with a mean of 100 and a standard deviation of 16. About what percent of people should have IQ scores above 116?

254. ## history

which statement was not used by the british government to justify taxing the colonies after 1763? A.the british national debt had increased as a result of the french and indian war B.heavy administrative expenses were associated with maintaining the empire

255. ## Chemistry, Algebra

A baker uses dried skim milk that contains 3.0% moisture and costs \$1.16 per lb, which on a moisture free basis would be \$1.20 per lb. If liquid skim milk containing 90.5% water costs \$1.60 per gallon (8.64 lbs), what would be the comparative cost of 1lb.

256. ## accounting

general ledger entry: sold \$700 of merchandise (that had cost \$220) on credit to Sam's Company.

257. ## management

common leadership problem that leads to failed vision is an inability to detect important changes in markets

258. ## algebra

pricipal is30,000 rate of interest is three and five eigth time thirty years find amount in account .show me step by step how to solve

259. ## College- Am. History

Describe meetings that resulted in the Japanese seeing “Rolls-Royce, Rolls-Royce, Ford,” and how was this part of Americans “clamoring for the outlawry of war.”

260. ## accounting

I have answer a hypothetical situation question as to what advice I would give to a business owner whose business in growing on how to make her accounting work more efficient. She manually enters in cash sales daily, makes purchase orders over the phone,

261. ## Chemistry

Both calcium sulfate and magnesium sulfate can form hydrates with water. Could white anhydrous CaSO4 or MgSO4 be substituted for anhydrous CuSo4? Why or Why not?

262. ## phy

A baseball (m = 145 g) traveling 45 m/s moves a fielder's glove backward 15 cm when the ball is caught. What was the average force exerted by the ball on the glove? find Magnitude

263. ## french

Hey, Can someone take a look at my french below, and let me know what corrections / changes I need to make please? French - Specialites: Cafe, creme beignet, et pate de francais English - Specialities: Coffee, Donuts (do I just add an s to beignet in

264. ## Europe

Describe the role of guilds in the trade and production of goods. How did trade and commerce grow during the middle ages?

265. ## phy

A baseball (m = 145 g) traveling 45 m/s moves a fielder's glove backward 15 cm when the ball is caught. What was the average force exerted by the ball on the glove? find Magnitude

266. ## physics

A ball is thrown horizontally from a 15m -high building with a speed of 8.0m/s. How far away from the base of the building does the ball hit the gnd. I'm needing help setting this up. I know change of Y is -15m, and the "a" is -9.8m/s^2, but i get lost

267. ## Accounting

The partners in New Yorker Company decide to liquidate the firm when the balance sheet shows the following.

268. ## Math algebra honours

In the equation ax - x = c what is x i did it so far but i need help this is what i got so far ax - x + x = 9 + x ax/a = c+x/a x= what that is what i need help on and also y=x-v/b please and thank you can you also explain thanks and may you have a

asked by Jacytiopa (i know its weird but my mom picked it)
269. ## phy

A 900 kg car rolling on a horizontal surface has speed v = 70 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of the spring?

270. ## Math

I am thinking of a three-digit number. If you subtract 5 from it, the result is divisible by 5. If you subtract 6 from it, the result is divisible by 6 and if you subtract 7 from it, the result is divisible by 7. What is the smallest number that will

271. ## Statistics

he Oil Price Information Center reports the mean price per gallon of regular gasoline is \$ 3.79 with a population standard deviation of \$ 0.18. Assume a random sample of 40 gasoline stations is selected and their mean cost for regular gasoline is computed.

272. ## phy

Jane, looking for Tarzan, is running at top speed (4.3 m/s) and grabs a vine hanging vertically from a tall tree in the jungle. How high can she swing upward?

273. ## math

How do you tell whether a table (x,y) represents a linear relationship

274. ## phy

A sled is initially given a shove up a frictionless 27.0° incline. It reaches a maximum vertical height 1.45 m higher than where it started. What was its initial speed?

275. ## chemistry

How many grams of Al will react with 3.00 mol of 0(2)?

276. ## math

What are the values of b which satisfy b- square root of 1-1996b=1?

277. ## Teachers Aide/Language and other Barriers

13. In an ESL classroom, teacher aides should prepare themselves to A. learn or become familiar with appropriate language-related software programs. B. handle all disciplinary measures that arise on behalf of the teacher. C. counsel parents regarding their

278. ## phy

A vertical spring (ignore its mass), whose spring stiffness constant is 1000 N/m, is attached to a table and is compressed down 0.130 m. (a) What upward speed can it give to a 0.200 kg ball when released? m/s (b) How high above its original position

279. ## Social Studies

Where can I find letters from Amerigo Vespucci on his 1 st voyage but not in old english.??? ASAP!!!

280. ## Chemistry

How would you prepare a 250 mL solution of . 45 M from a stock solution of 5.5 M?

281. ## Bio

The type of cartilage associated with bone function and development is what? I know that the elastic cartilage contains elastin which allows for elasticity and maintains shape of certain structures. Fibro is strong and rigid (strongest of 3) Hyaline

282. ## Paralegalism

A paralegal quits the firm of Johnson & Johnson. When she leaves, she takes client documents she prepared while at the firm. The documents contain confidential client information. The paralegal is showing these documents to potential employers as writing

283. ## physics

A crate weighs 820N and rests on a 34degree incline. You can keep it from sliding down the incline by pushing on it with a force of 240N applied parallel to the incline. 1)Calculate the coefficient of static friction between the crate and the incline.

284. ## Math algebra honours

Can someone please answer my question it is the other one named algbra honurs i am kinda new to this website so i don't know if you postt it twice or not can someone please help thankyou

asked by Jacytiopa (i know its weird but my mom picked it
285. ## math

three circles are externally tangent to each other. The radius of each circle is 6 inches. Find the following: a)the length of the shortest wire athat goes around them. b) the shaded area (space between them when stacked one circle on top of two)