1. chemistry

which solution has the highest concentration of hydroxide ions? a ph=7.93 b ph=12.59 c ph=7.00 d ph=9.82 e ph=3.21 i know the answer is 7 but why is it seven? would it be different if it said hydronium ions?

2. chemistry Molarity

You have 353 mL of a 1.25 M potassium Chloride solution, but you need to make a 0.50 M potassium Chloride solution. How many milliliters of water must you add to the original 1.25 M solution to make the 0.50 M potassium Chloride solution

3. chem

Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkling sodium bicarbonate on it and then mopping up the resultant solution. The sodium bicarbonate reacts with sulfuric acid as follows. 2 NaHCO3(s) + H2SO4(aq) --> Na2SO4(aq) + 2

4. Chemistry

The combustion of carbon disulfide in the presence of excess oxygen yields carbon dioxide and sulfur dioxide: CS2(g)+3O2(g)--->CO2(g)+2SO2(g) The combustion of 17.2 g of CS2 in the presence of excess oxygen yields __________ g of SO2.

5. Math

The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a standard deviation of 1.2 oz. What percentage of bottles contain less than 32 oz of soda?

6. trig

simplify cos(30+x)+cos(30-x)

7. Math - Geometric Series

Find the sum of the geometric series 128 - 64 + 32 - . . . to 8 terms. a) 85 b) 225 c) 86 d) 85/2 e) not possible

8. chem

Which compound listed below has the greatest solubility in water? CdCO3 Cd(OH)2 CaF2 AgI ZnCO3 how can i tell which on to choose, no matter what compounds are listed?

9. physics

A 0.150-kg ball, moving in the positive direction at 12 m/s, is acted on by the impulse of 4N*s what is the balls final velocity

10. Math

maria's bicycle has a diameter of 64 cm. as she rides at the speed of 21.6 km/h, she picks up a stone in her tire. draw a graph that shows the stone's height above the ground as she continues to ride at this speed for 2 s more. can someone please help me

11. algebra

the system of equations 3x -6y=20 and 2x-4y=3 Is dependent consistent inconsistent independent I think its inconsistent because somehow i ended up with 12=49.. can u show me the work too.I think i did it wrong.

12. Chemistry

The combustion of carbon disulfide in the presence of excess oxygen yields carbon dioxide and sulfur dioxide: CS2(g)+3O2(g)--->CO2(g)+2SO2(g) The combustion of 17.2 g of CS2 in the presence of excess oxygen yields __________ g of SO2.

13. physics

A child of mass 40 kg stands beside a circular platform of mass 90 kg and radius 1.6 m spinning at 2.8 rad/s. Treat the platform as a disk. The child steps on the rim. a) What is the new angular speed; b) She then walks to the center and stay there. What

14. accounting

Perez Company began operations in 2009. Since then, it has reported the following gains and losses for its investments in trading securities on the income statement: 2009 2010 2011 Gains (losses) from sale of trading securities \$ 15,000 \$(20,000) \$ 14,000

15. math

A bicycle wheel of diameter 26 inches is rolled through an angle of 720 degrees. how far has the wheel moved?

16. math

Trapezoid ABCD, top and bottom are parallel. Left is 45, bottom is 60, right is 30, top is unknown. Trapezoid EFGH is similar to ABCD, top and bottom are parallel. Top is 10, other sides are unknown. Area of ABCD is 9 times larger than EFGH. What is the

17. PHYSICS

A toy car in the figure below runs off the edge of a table that is h = 1.375 m high. The car lands d = 0.375 m from the base of the table. How long did it take the car to fall?

18. Physics

A fixed 0.15 kg solid-disk pulley with a radius of 0.075 m is acted on by a net torque of 6.8 m·N. What is the angular acceleration of the pulley?

19. Math

Use the 68-95-99.7 rule to solve the problem. - The amount of Jen's monthly phone bill is normally distributed with a mean of \$53 and a standard deviation of \$11. What percentage of her phone bills are between \$20 and \$86?

20. Math

Assume that math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. A score of 560 reprecents what percentile? Please round answer to the neareast tenth.

21. physics

A 70 kg painter is painting the wall of a building. He stands on a horizontal board of length 4.7 m and mass 15 kg, suspended from vertical ropes attached to each end. If the painter stands 2.0 m from one end of the board, what would the tensions in the

22. Physics

The blades of a fan running at low speed turn at 200 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 340 rpm in 5.92 s. (a) What is the magnitude of the angular acceleration of the blades? (b) How many revolutions do

23. physics

Calculate the period of a ball tied to a string of length 0.3 m making 1.9 revolutions every second.

24. physics

A turntable with a moment of inertia of 0.014 kg*m2 rotates feely at 2.7 rad/s. A circular disk of mass 500 g and diameter 22 cm, and initially not rotating, slips down a spindle and lands on the turntable. a) Find the new angular speed. rad/s b) what is

25. Math

For a model rocket, the altitude h in meters, as a function of time t, in seconds, is given by h=68t-8t^2. after how many seconds will it hit the ground?

26. Physics - Hellp Really Stuck!

1. A 0.20 kg object moves at a constant speed in a horizontal circular path of radius "r" while suspended from the top of a pole by a string of length 1.2 m. It makes an angle of 62 degrees with the horizontal. What is the speed of this object? 2. An

27. math

Explain why the angle relationship shown are not possible triangle angles 2x-15 3x-17 4x+12

what is the gerund or gerund phrase in the sentence. Cheering the team gave me a sore throat.

29. statistics

Given the data 22,29,21,24,27,28,25,and 36 - and using the range rule of thumb - what is the standard deviation?

30. Calculus AB

The volume V or a cone (V = 1/3 π r² h) is increasing at a rate of 28π cubic units per second. At the instant when the radius r of the cone is 3 units, its volume is 12π cubic units and the radius is increasing at 0.5 unit per second. a) At the instant

31. physics

Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a thrust of 35 N. If it is fired to change the velocity of a 71500 kg spacecraft by 63 cm/s, how long should it be fired?

32. physics

Before a collision, a 28 kg object is moving at +13 m/s. Find the impulse

33. math

projectiles what is the formula? Question A firework company is designing fireworks so that they can explode above a certain height. the fireworks are fired from the ground at an initial velocity of 160 ft per sec, what is the range of times for the

34. Geometric series - Check my answer

What is the first term in a geometric series with ten terms, a common ratio of 0.5 and a sum of 511.5? I got 256 as my answer. 511.5=a1[1-(.5)^10]/1-1/2 511.5=a1(1023/1024)/1/2 511.5=a1(1023/512) ----> divide by both sides 256=a1

35. physics

A circular disk of mass 0.2 kg and radius 24 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.4 rad/s. a) Find the new angular velocity of the combination; rad/s b) The

36. chemistry

The solubility of nickel (II) carbonate at 25 degrees celsius is 0.042 g/L. Calculate Ksp for nickel (II) carbonate. thanks

37. Physics

a barefoot field-goal kicker imparts a speed of 30 m/s to a football at rest. If the football has a mass of 0.50 kg and time of contact with the football is 0.0025 s, what is the force exerted on the foot?

38. Elem Algebra

solve the formula for specified variable V=BQT for B B = ____

39. math

Aki spent 3/8 of his pocket money on food, 2/5 of the rest on transport and returned the remaining amount to his mother. What fraction of the money did he give back to his mother?

40. College Physics

An object initially at rest experiences an acceleration of 1.4 m/s^2 for 5.0s and then travels at that constant velocity for another 7.0s. What is the object's average velocity over the 12s interval?

41. PHYSICS

A toy car in the figure below runs off the edge of a table that is h = 1.375 m high. The car lands d = 0.375 m from the base of the table.How fast was the car going on the table?

42. Chemistry

Which of the following oxides yield an acidic solution when dissolved into water? P4O10 Na2O ClO7 Fe2O3 Thanks for any help.

43. exam study math guide CRUICAL

The average of Anne's, Sara's, and Julie's test score is 72. Julie scored 100 and Anne scored 10 points higher than Sara.what were annes and saras scores?

44. algebra

The mathematical model C(x)=800x + 20,000 represents the cost in dollars a company has in manufacturing x items during a month. Based on this, how much does it cost to produce 500 items?

45. calculus

A 6-foot man walks away from a 16-foot lamppost at a speed of 5 ft/sec. Find exactly the rate at which his shadow is increasing in length.

46. Word Problem - Check Answer (geometric Seq)

1) Suppose five people are ill during the first week of an epidemic and that each person who is ill spreads the disease to four people by the end of the next week. By the end of the tenth week of the epidemic, how many people have been effected by the

47. Math

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

48. college

The angle of elevation from point A to the top of a vertical pole is 30.0 degrees. At point B, 6 meters closer to the base of the pole and on a line through the base of the pole and point A, the angle of elevation to the top of the pole is 37.0 degrees.

49. chemistry

What is the molarity of the resultant MgCl2 solution formed by mixing 100 cm3 of 0.5 M MgCl2 solution and 150 cm3 of 0.9M MgCl2 solution?

50. math

-6x8 -x+=- -6x8=48

51. English

1. We watched TV for two hours. 2. We watched TV at night/ at the shop. 3. We watched (or have watched) TV by the time he arrived. 4. We watched (or have watched) TV by 7 p.m. 5. We watched TV by day. 6. We watched TV by the table. 7. We have watched TV

52. chemistry

What is the pOH of a 0.032 M Ca(OH)2 (strong base) solution? i solved it by doing 14=-log (0.064) 14-1.19= 12.81 but the right answer is 1.19, why? i thought the OH in the problem meant i had to use 14?

53. physics

A cylinder with a diameter of 23 cm rolls with an angular speed of 0.30 rad/s on a level surface. If the cylinder experiences a uniform tangential acceleration of 0.022 m/s2 without slipping until its angular speed is 1.01 rad/s, through how many complete

54. Earth

Where is Greenland on Pangaea?

55. math

two spherical cantaloupes of the same kind are sold at a fruit and vegetable stand. The circumference of one is 60cm and that of the other is 50cm. The larger melon is 1 1/2 times as expensive as the smaller. Which melon is the better buy and why?

56. Math

Scores on a test are approximately normally distributed with a men of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students. What is the bottom cutoff for an A grade? Please round answer to the nearest whole number

57. chemistry

A saturated solution of PbSO4 has [Pb^2+] = 1.35E-4M. What is the concentration of SO4^2-? thanks

58. chemistry

How many ml of water at 10 degrees c must be added to 75 ml of water at 35 degrees c to obtain a final temperature of 19 c?

59. physcis

a particle moving at a velocity of 6 m/s in the positive x direction is given an acceleration of 3.9m/s^2 in the positive Y direction for 3.4s. what is the final speed of the particle? answer in units of m/s

60. Intermediate Accounting

During 2009 Bradley Corporation issued for \$110 per share, 5,000 share of \$100 par value convertible preferred stock. One share of preferred stock can be converted into three shares of Bradley’s \$25 par value common stock at the option of the preferred

61. accounting

Houser Appliances accounts for all sales of its merchandise on the installment basis. Following is the unadjusted trial balance at 12/31/12. Cash \$45,000 Installment accounts receivable—2010 20,000 Installment accounts receivable—2011 50,000

62. french

what is rinétede, ropterég and miénocoser? plz anser! thx :)

63. math

There is on large rectangle ABCD, top line is AD and bottom is BC. A line is drawn from the top to bottom called GH. A line is drawn from left to right called EF. AEFG is Rectangle 1. EBHF is Rectangle 2. GHCD is Rectangle 3. All three rectangles are

64. Math

3x-6y=12 find the slope, y intercept and general equation

65. Calculus

On an 18-hole golf course, there are par-3 holes, par-4 holes and par-5 holes. A golfer shoots a par of 70 for the 18 holes. There are twice as many par-4 holes as par-5 holes. How many of each type of hole are there on the golf course?

66. physics

The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has

67. Intermediate Accounting

Prepare all the necessary journal entries to record the following transactions: 1. Sale of a 20 year convertible bond (dated March 1, 2001) with a face value of \$1,000,000, interest rate 5%. The bonds were sold 4 months later on June 30, 2001 at 98 plus

68. English

A: Hello. B: Hello. May I speak to Mina? A: This is she. B: Hi, Mina. I am Jake. A: Hi, Jake. What's up? (Is the expressions 'I am Jake' correct in a telephone conversation? Do we have to use 'This is jake'?)

69. physics

Two spheres are placed so that their centers are 2.9 m apart. The force between the two spheres is 2.60 multiplied by 10-12 N. What is the mass of each sphere if one sphere is twice the mass of the other sphere?

70. circle geometry triangles

how do u construct a circle that is circumscribed of a triangle? how do u constuct a circle that is inscribed in a triangle? i am a bit confused and I have finals next week!

71. Chemistry

A 3.23 gram sample of a sodium bicarbonate mixture was reacted with excess acid. 48.52 mL of the evolved gas was collected over water at 0.930 arm and 23.0 degrees Celsius. What is the percentage of sodium bicarbonate in the original mixture? The pressure

72. social science

Suppose that you were head of a family planning agency in India. How would you design a scientific study to determine the effectiveness of different approaches to population stabilization? How would you account for factors such as culture, religion,

73. Analytic Geometry

Express by an algebraic equation the statement that the line joining P(x,y)to the point (12,-5) has an inclination of arctan 1/3. please help...thanks

74. English

Has anyone read the Crucible Act 1? 1. I can't find where the Putman's reveal that they sent for " ". At first I thought it was Rev. Hale but it was Parris who sent for him. and then I thought Mercy but that was who Mrs. Putman sent for not both the

75. math

with clear illustrations and examples explain how arithmetic and geometric progression can be used to solve problems related to a)construction of business b)banking business c)production/operation function

76. physics

A 4.0 kg pulley of radius 0.15 m is pivoted about an axis through its center. What constant torque is required for the pulley to reach an angular speed of 25 rad/s after rotating 6.0 revolutions, starting from rest?

77. Chemistry

If 50.0 kJ of heat are added to a 20.0 gram ice cube at -5.00 degrees Celsius, what will be the resulting state and temperature of the water? I need some serious help with this! I think I'm making it much harder than it really has to be.

78. Gen Chemistry

52.8 mL of a calcium chloride solution with unknown concentration was treated with phosphoric acid to remove all of the calcium ions in the form of a precipitate. The precipitate was filtered, dried and was found to have the mass of 3.9565 g. What was the

79. General Chemistry

The Henry's Law constant for O2 in water is 1.28 x 10 ^ -3 M/atm. How many grams of O2 will dissolve in a 12 L fish tank on a day when atm is .977 and air is 18% O2? Show steps

80. PHYSICS

You accidentally throw your car keys horizontally at 10.0 m/s from a cliff 78 m high. How far from the base of the cliff should you look for the keys?

81. Intermediate Accounting

On January 4, 2002, Wynn, Inc., bought 15% of Parr Corporation’s common stock for \$60,000. Wynn appropriately accounts for this investment by the cost method. The following data concerning Parr are available for the years ended December 31, 2002 and

82. Intermediate Accounting

Information relating to the capital structure of Parke Corporation is as follows: ` December 31 2008 2009 Outstanding shares of: Common stock 90,000 90,000 Preferred stock, convertible into 30,000 shares of common 30,000 30,000 10% convertible bonds,

83. physics

The blades of a fan running at low speed turn at 200 rpm. When the fan is switched to high speed, the rotation rate increases uniformly to 340 rpm in 5.92 s. How many revolutions do the blades go through while the fan is accelerating?

84. Physics

A m = 1.4 kg object moving at v = 15 m/s collides with a stationary 2.0 kg object. If the collision is perfectly inelastic, how far along the inclined plane (37degrees) will the combined system travel? Neglect friction.

85. statistics

Computer Services wants to estimate the mean number of hours college students use on campus computers each day. They want to be within .1 hour of the true value with 99% confidence. From a previous study, the standard deviation is assumed to be .6 hour.

86. College Algebra - Chemistry

A goldsmith has two gold alloys. The first alloy is 25% gold and the second is 55% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 43%?

87. College Algebra

Solve the system: x + y + z = -1 2x + 2y + 5z = 1 5x + 2y + 3z = 8 what is the value of x in the solution?

88. Intermediate Accounting

Wolf Company issued 1,000 of its \$1,000 face amount, 20-year bonds on June 30, 2010, for \$1,020,000. Each bond carries five detachable stock purchase warrants, each of which entitles the holder to purchase for \$60 one share of Wolf’s common stock. On

89. Gen Chemistry

i got the moles of Ca3(PO4)2=0.01275549 but how do i covert that to moles of CaCl2? using the stoichiometric ratio which is 1:1 or am i doing something wrong

90. physics

A 10 kg moving object has kinetic energy of 90 J. What is the magnitude of its momentum? [Give answer to within 2 decimal places and use proper symbols as in textbook to indicate units].

91. College Chemistry

48.70 mL of an HCl stock solution was transferred into a 500 mL volumetric flask and filled to the mark. 47.67 mL of the diluted solution was titrated with 0.179 M NaOH and found to have the concentration of 0.885 M. What is the concentration of the stock

92. Analytic Geometry

Find the value of x if the slope of the line segment joining (3/10,6) and (x,-4) is 5.

93. Math

What steps do I take in order to solve : (101-100) = .512 times (x/.5) solve for x and show steps

94. Physics

A 15500 N automobile travels at a speed of 41 km/h northward along a street, and a 7000 N sports car travels at a speed of 65 km/h eastward along an intersecting street. a)If neither driver brakes and the cars collide at the intersection and lock bumpers,

95. math

a rectangular plot of land is to be seeded with grass. If the plot is 22m x 28m and a 1kg bag of seed is needed for 85m squared of land, how many bags of seed are needed?

96. Chemistry

If 30.0 g of H2 were used, how many grams of NH3 would be made?

97. ALGEBRA

multiply r^2+7r+10/3 by 3r-30/r^2-5r-50

98. Intermediate accounting

Rosson Corporation, which began business on January 1, 2008, appropriately uses the installment sales method of accounting for income tax reporting purposes. The following data are available for 2008: Installment accounts receivable, 12/31/2008 \$200,000

99. georgia history

Sherman's Atlanta campaign battles what is the date of the battle where is the location ,why is particular battle significant in the civil war,

100. ALGEBRA

divide m^2n^3/p^3 by mp/n^2

101. Chemistry

The pH of a buffer prepared from .30M H2X2O4 and .15M Na2C2O4(Ka of H2C2o4 is 5.6x10^-2

102. Math

Diven the data 3.5,1.6,2.4,3.7,4.1,3.9,1.0,3.6,4.2,3.4,3.7,2.2, and using the range rule of thumb, what is the standard deviation?

103. physics

Two boxes are similar. The larger box has a volume that is 64 times the volume of the smaller box. What is the ratio of the larger box's height to the smaller box's height? write the fraction as a decimal

104. Economics

Topic- Each students will pick three things to write a consumer report on. It's your choice. Compare-For each item that you pick you will need to pick two other items to compare it against. (if you choice restaurants, then you need to pick one, then pick

105. English

Posted by rfvv on Thursday, December 9, 2010 at 11:58pm. Posted by rfvv on Thursday, December 9, 2010 at 10:03pm. 1. We had to cook the turkey for six hours. 2. We had to cook the turkey in six hours. 3. We had to cook the turkey until six hours. 4. We had

106. chemistry

Hi, I've watched a tutor solve a simple dilution solutions problem on video. There's a calculation in that problem I wish you could clarify for me. It goes like this: Approximately what volume of water is needed to dilute 25.0 mL of 18.0 M sulfuric acid to

107. hsm220

Is the Statement of Opportunity the mission statement or Statement regarding equal opportunity?

108. physics

A ball has a mass of 0.14 kg and is pitched w/ velocity of 38 m/s. The batter hits the ball & departs w/ a velocity of 58 m/s. Contact time b/w the bat and ball is 4.0 x 10-3seconds. What is avg force exerted on ball?

109. Math (sequence)

Find the first four terms of each sequence. A1= 2 A2=5 An=An-1 + An-2, n≥3

110. algebra

If a bateria culture starts with 4000 bateria and doubles every 20 minutes, how many minutes will it take the population to reach 39000?

111. math

show that the points A(0,-4) B(3,-1) C(-3,-1) lie on the circle whose centre is (0,1). find the length of its radios

112. ALGEBRA

divide 40x/64y by 5x/8y

113. Intermediate Accounting

Island Builders, Inc., has consistently used the percentage-of-completion method of accounting for construction type contracts. During 2004 Island Builders started work on a \$9,000,000 fixed-price construction contract that was completed in 2006, Island

114. math year 3

identify the vertex and axis of symmetry y=2x^2-28x+91

115. English

We didn't have to go to school yesterday. (What is the meaning of the sentence? Is it #1 or #2? 1. We didn't go to school yesterday because it was useless. . 2. We went to school yesterday, but it was useless. )

116. algebra

multiply r^2+7r+10/3 by 3r-30/r^2-5r-50

117. physics

Please show work to how you find this answer. A baseball is thrown with an initial velocity of 30 m/s at an angle of 45 degrees. Neglecting air resistance, how far away will the ball land?

118. psycology

Do an ESSAY Using Kohlberg's three levels and six stages of moral reasoning, create a character that passes through each stage and explain how she/he responds to moral dilemmas present at each stage.

119. marketing

Can someone please help me with this? I really just do not know where to start researching for the answer, where are some good places to look? Develop a research proposal in the form of a PowerPoint presentation of 8–15 slides. Your proposal should

A volume is measured experimentally as 4.5 mL. What is the percent error, given that the correct value is 4.17 mL? answer units in %

What is the most important reason that sediments at beaches are usually rounded and smooth?

122. Binomial Coefficients

Evaulate: n n-2 (expression should be in large brackets) I got n! /n-2! 2! . I know this is wrong but am not sure what to do next.

123. Biology-Respiratory System

What's the difference between capillaries, pulmonary artery and pulmonary vein?

124. Legal aspects healthcare

Healthcare professionals who have a “need to know” access to medical records have a legal and an ethical obligation to protect the confidentiality of the patient information. I think it is not true, right?

125. math

-2x-5= negative x negative= positive 5x2=10 -5x-2=10

126. Analytic Geometry

Express by an algebraic equation the statement that the line joining P(x,y)to the point (12,-5) has an inclination of arctan 1/3.

127. Organic Chemistry

What information can be obtained from the hydrolysis of a peptide of unknown composition? What information cannot be obtained by from the hydrolysis experiment?

128. College Algebra

Solve the system: 4x-3y=-3 y=6x-13 What is the value of y in the function?

129. ALGEBRA/AM I CORRECT?

THANK YOU! Solve by substitution 3x+6y=6; -6x+y=40 My WORK: Y=40+6X; 3X+6(40+6X)=6; 3X+240+36X=6; x=-5.51; y=40+6(-5.51); y=40+-33.06; y=6.94 (-5.51,6.94) Is this right???

130. Intermediate Accounting

On February 24, 2006, Bart Company purchased 2,000 shares of Winn Corporation’s newly issued 6% cumulative \$75 par preferred stock for \$152,000. Each share carried one detachable stock warrant entitling the holder to acquire at \$10, one share of Winn

131. English

1. We talked until late. (What is the part of speech of 'late'? Is it an adverb or a noun?)

132. language infinitives

Some facts are easy enough to memorize. to memorize is the infinitive is it used as an adverb?

133. language infinitives

Good study skills are a way to learn. to learn- infin. used as an adj.? A person with good study skills is someone to admire. to admire- infin. used as an adj.?

134. Calculus

if x^2 + y^3 = (x^3)(y^2) then dy/dx = ? thanks

1) A strategy for health promotion among infants toddlers and young children focuses on educational programs physical fitness activities and a. family planning b.tobacco,alcohol, and drug use. c.Nutrition. d.mental health & menta disorders. 2)The main goal

136. math

The volume of a ball is 288 pi cm^3. Find the dimensions of a rectangular box that is just large enough to hold the ball. use 3.14 for pie

137. Comm

Personal finance classes can help you if you have difficulties making budgets. Looking for verb and verb tense

138. History

Like for economic I know that revolves around the industry and employment. Could someone give some examples of what exactly is social change in the US? Does it involve the people. I'm confused

139. U.S. history

what proplems did the rapid growth of cities pose to U.S.decades following the civil war?

140. college math

Use the Reference Angle Theorem to find the exact value of sec(13 pi/6).

141. math

REmove one toothpick to make a true equation I-III=II

142. Intermediate Accounting

Burr Corporation began operations on January 1, 2007, and at December 31, 2007, Burr had the following investment portfolio of marketable equity securities: In current assets In noncurrent assets Aggregate cost \$185,000 \$275,000 Aggregate market value

143. English

We cooked a big turkey. Dad cooked the turkey this year. After 6 hours, the turkey was finally ready. (Is each turkey a large bird or meat from a turkey in the sentence?)

144. math

If a tank were blocked in (all inlets and outlets are closed) late in the evening with a temperature of 62F a pressure gauge attached to it would read an ambient pressure (14.7 PSIA). The next day, as the sun begins to shine directly on the tank, its

145. physics

at what angle with respect to the horizontal should the shot put be launched if the starting height is 2.0m to have the greatest range?

146. Earth

What layers of the Earth are the continents sliding on?

147. JUST HELP ON SIGMUND FREUD

what are sigmund freud's major contributions to society?

148. Calculus

prove that out of the rectangles under the curve = e raised to the power of -xsquared on the x axis and upper vertices on the curve, the one has the largest area the two upper vertices of which are exactly at the points of inflection of the curve.

149. Algebra

2^(2x+11)=3^(x-12) x=?

150. Algebra

in x^2+14=0, how many solutions do we have? A)2 real solutions B)1 real solution C)2 imaginary solutions Im guessing A

151. Analytic Geometry

Find the value of x if the slope of the line segment joining (3/10,6) and (x,-4) is 5.

152. Analytic Geometry

Solve 3r + 18 ¡Ü 6r

154. History

Explain the politcal movements of the 20th century in U.S. domestic life. How are they relevant or not relevant to the "culture wars"?

155. Intermediate Accounting

Total contract price \$100,000 Actual costs during 2006 20,000 Estimated remaining costs 40,000 Billed to customer during 2006 30,000 Received from customer during 2006 10,000 16. Under the completed contract method, how much should Hickam recognize as

156. Analytic Geometry

Express by an algebraic equation the statement that the line joining P(x,y)to the point (12,-5) has an inclination of arctan 1/3. Pls. answer

157. English

A sleepover is a type of party when several young people stay for the night at a friend's home. (What is the part of speech of 'when'? Is 'when' a conjunction or a relative adverb? Can we use 'where' instead of 'when'?)

158. English

A: Would you like me to join you? B: Good. I'd like to join you. (What do you think about the answer B? Is it suitable? What other expressions/answers would you recommend?)

159. language infinitives

You will need to learn if you are striving for a goal. infinitive is: to learn is it used as an adverb?

The population of nevada is close to 1.6 million, which is about (1)/(5 ) of michigan population. What is the estimated population of michigan?

161. Physics

If you throw a cricket ball up into the air and the ball leaves your hand at 1.8m and travel with a speed of 9.7m s. What is the speed at the point it hits the floor. Accerlation due to gravity is 9.8 ms no air resistance

162. Ms. Sue

Ms. Sue could I please receive ur help on my homework. I have to do a presentation and Its a media project which I have to represent, its on the Freedom Writers- the book, and two media clips. The media clips are Hannas suitcase and Paperclips. I also got

163. Math

Find a 95% confidence interval for the true population portion. In a survey of 319 female employees of a large company, 29% said that they had experienced some form of sexual harassment while working for the company.

164. Math

using the range rule of thumb to approximate the standard deviation - a distribution of data has a maximum value of 80, a median value 0f 60.5 nd a minimum of 41. - Please round to the nearest tenth.

165. Math - Sum of a Series

Find the sum of the series 23 + 18 + 13 + . . .+ (-82) A) -590 B) 590 C) -649 D) 649

166. math

show which of the following group are collinear and which ones are not a) A(-3,-3) B(1,0) C(5,3) b)K(3,-1) L(5,1) M(1,7)

167. com

Write three sentence using plurals correctly and three sentences using possessives correctly on the topic of how to store personal financial information effectively and efficiently.

hello i need someone to check these for me? 6) alcohol,drugs,radiation,and pollutants that affect a child development are called a.teratogens b.toxic inhibitors c.tranferal agents. d.phenylanines 10) monstrates an inability to leap over a barrier, his

169. health care

Compare and contrast the goals of a producer of a health commodity (e.g. a service or a good) versus a producer of a nonhealth commodity

170. History

The U.S. in the 20th century has intervened in a number of places across the globe and fought several wars. What do these wars/"actions" have in common?

171. chemistry

a liquid that has a density of 22 g/mL and a mass of 16 g, how much of the liquid do you have in the container?

172. Pre-Cal

Find the domain for the function f(x)=-2x^(2)÷-x^(2)-6x-27

173. math

solve. x^2 + 6x + 13 = 0

174. math

find the distance between each two points in the following a)A(1,-7) B)(2,-1) b)A(0,0) B)(1,3) c)A(6,9)B)(9,6)

175. math

prove that the four points A(2,4)B(0,1) C(3,-1) D(5,2) are the vertices of square

176. Spanish

Need ten names of famous men and women who are of spanish descent

177. General Chemistry

how many grams of a protein weighing 4500 grams/ mol must be present in 100 ml of water solution to a given osmotic pressure of 18 mm hg at 25 degrees celcius...( use formula of pie = Mrt

178. English

please I need help to check if my sentence or paragraph correct with five adjectives and five adverbs. I also need to compare the event to similar by using at least three comparatives and three superatives. I recently watched a "lovely old movie called

179. Chemistry

How many molecules of water are produced if 2.00 g of ammonia and 4.00 g 02 are reacted together?

180. finite mathmatics

elimination method 5x + 6y = -75x - 3y = 146

181. health

how do you feel the portrayal of sex in the media influences the sexual desicions teens make today

182. college math

Express (cos^2t/tan^2t) as an expression that involves only the sine function.

183. math year 3

identify the vertex and axis of symmetry y=2x^2-28x+91

184. physics

a bicyclist has a mass of 50 kg. Intial velocity is 20 m/s as she hits the bottom of the hill. Doing no work, she reaches the top of the hill with a final velocity of 5 m/s. What is the vertical height of the hill?

185. English

1. Mother told me, "Not to take a long nap." 2. Mother told me,"Don't take a long nap." (I think #2 is right? What about #1?) 3. Every time I have to read out loud, I get so nervous. 4. Each time I have to read out loud, I get so nervous. 5. Whenever I

186. anatomy

Hemostasis /mechanism or stages

187. Math

How could you define the perimeter of a non-simple closed curve? Give an example in your explanation.

188. language infinitives

If you are restless, there is no solution except to concentrate. to concentrate- infin. used as an adverb?

189. Physical Science

a net force if 7 N acts on a 7 kg mass over a distance of 5m. How much work did this force accomplish?

190. english

how could i fix this phrase "when i was spoon feeding her soup"

191. math

-15/(-5)= -x-=+ 15/5= 3 3

-5-(-5) 0

193. Math

solve using addition or subtration 12x+9y= 14 6x= 7y - 16

194. math

A railing for a deck requires pieces of redwood 4 ft 9 in, 13 ft 9 in, and 4 ft 3 in long. What is the total length of material that is needed?

195. math

solve using square roots: 4(x-1)^2-15 =41

196. math

prove that each of the following two triangles is right angle a)A,B,C:A)(3,5) B)(1,4) C)(2,2) b)L,M,N:L)(0,-4) M)(6,2) N)(3,5)

197. bio 101

how the organism in the diagram has evolved physiologically to become suited to its environmen

198. math

------------------ 4cm | (1) | | |_____| | | | | 9cm | (2) | (3) | | | | ------------------ Rectangle 1 & 2 & 3 are similar. What is the area of Rectangle 3.

199. history

would fed deficit spending be considering a political issue or economic issue?

200. math

9/(-3) + / - = - 9/-3=-3

201. math

48/(-12) + / - = - 48 / -12 = -4

202. art

what changes when we bring the element that make the earthwork indoor?

203. Math

I don't understand where for North you put 3-1. The boat moved 1km South and 3km North. Is that how this was done?