1. Chemistry

Write a balanced equation for the formation of boehmite (ALO2H) from aluminium ions and hydroxide ions.

2. Math

a) Determine an equation, in simplified form, for the family of cubic functions with zeros 2 +- sqrt5 and 0. b) Determine an equation for the member of the family with graph passing through point (2,20)

3. Chemistry

What is the concentration of Hg^2+ in 500.0 mL of a solution that was originally 0.011 M Hg^2+ and had 73 g of KI added to it? Hg^2+(aq) + 4I^-(aq) HgI4^2-(aq) The overall formation constant is 1x10^30

4. Statistics

The actual weights of bag of pet food are normally distributed.The mean of the weights is 50.0 lb,with a standard deviation of 0.2 lb. A)About what percent of bags of pet food weigh less than 49.8 lb?

5. physics

A car sounds its horn (502 Hz) as it approachs a pedestrian by the side of the road. The pedestrian has perfect pitch and determines that the sound from the horn has a frequency of 520 Hz. If the speed of sound that day was 340 m/s , how fast was the car

6. statistics

A person who has served three consecutive terms of four yrs shall be eligible for appointment, nomination for or election to the office of council-member no sooner than for a term beginning eight years after completion of that council member's third

7. Calculus AP

i wanna KNOW IF im DOING RIGHT. Evaluate the difference quotient for the given function. Simplify your answer. f(x)=x+3/x+1, [f(x)-f(1)]/(x-1) simplify my answer: [(x+3)/(x+1) - (1+3)/(1+1)]/(x-1) = [x+3/x+1 - 4/2] / (x-1) = [2(x+3)-4(x+1)/2(x+1)] / (x-1)

8. need help in tis problem

which biconditional is not a good definition? 1. a whole number is odd if and only the number is not divisible by 2 2. an angle is straight if and only if its measure is 180 3. a whole number is even if and only if it is divisible by 2 4. a ray is a

9. Economics

1. Why is representative money more useful than commodity money? B. Representative money has value because the government says it does. C. Representative money exists in unlimited supply, so more people use it. D. Representative money is portable, durable,

10. Statistics

The actual weights of bag of pet food are normally distributed.The mean of the weights is 50.0 lb,with a standard deviation of 0.2 lb. B) In a group of 250 bags,how many would you expect to weigh more than 50.4 lb?

11. physics

A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s2 for 14.0s. It runs at a constant speed for 70.0 s and then slows down at a rate of -3.50 m/s2 until it stops at the next station. a) Sketch a position vs. time graph for

12. Physics

"A person is playing a small flute 10.75 cm long, open at one end and closed at the other, near a taut string having a fundamental frequency of 600.0 Hz. If the speed of sound is 344.0 m / s, for which harmonics of the flute will the string resonate? In

13. chemistry

at 700 k the equilibrium constant for the reactions is Kp=0.76. Carbon tertrachrolide gas yields carbon solid and chlorine gas. A flask is charged with 2.00 atm of CCl4, which then reaches equilibrium at 700K. A) what is the fraction of the CCl4 is

14. Physics

Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. If you are 3.00 m from speaker A directly to your right

15. english

Select the correct noun clause in the sentence below. Then, choose the function of the noun clause. The real question is whether he will be on time to the concert tonight.

16. statistics

The actual weights of bag of pet food are normally distributed.The mean of the weights is 50.0 lb,with a standard deviation of 0.2 lb. C)In a group of 50 bags,how many would yu expect to be within 1.5 standard deviations of the mean?

17. chemistry

what is the equilibrium expression for P4(s) +5O2(g)P4O10(s) I think it is 1/[O2]^5 but the answer says [P4010]/[P4][O2]^5

18. Social studies

Was Shi Huangdi a good ruler?

19. physics

A speed bike tops a hill at 3.5 m/s and accelerates steadily down hill reaching a speed of 11.4 m/s after 4.2 seconds. How far did the bike travel during this period?

20. History

Which of Roosevelt’s early New Deal programs illustrate his willingness to experiment with bold, innovative ideas? Which of his actions show his hesitation and attachment to conventional values?

21. physics

Assuming that the speed of sound at a certain altitude is 330m/s calculate the speed of an airplane that is travelling at (A) mach 0.70

22. PHYSICS

If you increase the distance between two identical point charges so that the new distance is five times the original distance, what happens to the force between them? I know it is suppose to be divided by 25 but why?

23. Physics

How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97×1024 kg, the Moon's mass is 7.4×1022 kg, and the distance between their centers is 3.8×108 m.

24. physics

A small block with mass 0.0400 kg slides in a vertical circle of radius 0.0700 m on the inside of a circular track. There is no friction between the track and the block. At the bottom of the block's path, the normal force the track exerts on the block has

25. Math

a rectangular block 16 cm long has two spare faces. A cube of volume 343 cubic centimetre is cut from the rectangular block. Find the volume of the remaining block. Help me pls^

26. Social studies

Show how each improvement helped the Qin dynasty. Improvement. Advantage 1. Road system 2. Canals 3. Great Wall

27. chemistry

why does C4H10 have a higher BP than C2H6,C3H8, CH4

28. physics

a man 60 kg skating with a speed of 10 m/s collides with 40 kg skater at rest and they cling to eachother. Find the loss in kinetic energy?

29. geometry

The vertices of pentagon LMPQR are at L(4, -2), M(5, -2), P(8, -5), Q(6, -7), R(2, -4). The coordinates of the pentagon after two translations are L'(-5, -1), M'(-4, -1), P'(-1, -4), Q'(-3, -6), R'(-7, -3). How was LMPQR translated to create L'M'P'Q'R'? To

30. maths

divide the number 52728 by the smallest number so that the question is a perfect cube. also find the cube root of the quotient.

31. Social studies

In what ways was Shi Huangdi great? What impact did he have on China?

32. English I Part II College Prep Program

Give two examples of each of the following elements of poetry from the poems you have read in Units 4, 5, and 6. Metaphor: Simile: Personification: Onomatopoeia: Imagery: Sensory Language: Rhyme: Alliteration: Assonance: Consonance: Repetition:

33. english

Select the gerund phrase in the sentence below. Then, determine the noun function of the gerund. Brett earns his income by repairing cars.

34. statistics

The actual weights of bags of pet food are normally distributed.The mean of the weights is 50.0lb,with a standard deviation of 0.2lb. Sketch a normal cuve for the distribution.Label the x-axis at one,two,and three standard feciation from the mean,in

35. geometry

The following are angles in a convex quadrilateral: Angle A = 75.3 degrees Angle B = 114.8 degree Angle C = 65.9 degrees What is the measure of the missing angle?

36. math

In a pet shop one half of the animals are dogs.one fourth of the animals are bunnies. Six of the animals are cats. There are an equal number of cats and bunnies. How many dogs are there in the pet shop

37. geometry

In exercises 31-34, a cooler at a picnic contains 100 cans of soda covered by ice. There are 30 cans of soda, 40 cans of orange soda, 10 cans of ginger ale,and 20 cans of root beer. The cans are all the same size and shape. If one can is selected at random

38. physics

A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 5.9 m due east. For the second putt, the ball travels 2.8 m at an angle 20° north of east. The third putt is 0.50 m due north. What displacement

39. algebra

Christine went shopping and brought each of her eight nephews a gift , either a video costing 14.95 or a cd costing 16.88. she spent 133.41 on the gifts. How many videos and how many cds

40. Physics

The uniform sheet of siding shown has a centrally-located doorway of width 2.0 m and height 6.0 m cut out of it. The sheet, with the doorway hole, has a mass of 264 kg. (a) What is the x coordinate of the center of mass? (b) What is the y coordinate of the

41. Math

On a nine-question true-or-false test you randomly guess at the answers. What is the probability that you get all nine answers correct? What is the probability that you get all nine answers wrong?

42. Science HW qs. Check (plzzzz read!!!!)

1. How does the flow of energy through an ecosystem compare with cycling of matter? i put energy moves through an ecosystem in the form of food am i correct??????????

43. SLS 1000-11H-5A12-S14, Student Learning Success

Articles: Title: Lasting Menace Author: David Biello Published: July 2010 One direct quote with appropriate APA in-text documentation One paraphrase with appropriate APA in-text documentation The reference listing in appropriate APA documentation A 300

44. geography

Taken as a whole, what would you say is the single most pressing problem found in Latin America or South America? What possible solutions can you develop? My Answer: In my opinion, the most pressing problem would have to be the management of poverty. South

45. physics

A runner covers one lap of a circular track 40.0 m in diameter in 62.5 s. Suppose initially the runner starts by going in the north direction. Assume the speed is constant for the first half-lap and then constant for the 2nd half-lap. Suppose instead the

46. Geometry

A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. What is the ground speed of the plane? 2. When you solve the triangle, what is the smallest angle? 3. What is the largest angle of the triangle? 4. What is the remaining angle? 5.

47. physics

If a concave mirror with a radius of curvature of 0.93 m has an object placed at 0.37 m in front of it, what is the mirror's focal length? Round your answer to 3 decimal places.

48. Physical Edu

which of the following nutrients has the most calories per gram? a. minerals b. carbohydrates c. fats d. protein e. vitamins is it C

49. english

the chorus in ode 3 comments on the a. power of love b. duty of sons to their fathers c. relationship of haimon and antigone d. effect of creon's inflexibility

50. principle of accounting

raper Consulting began operations and completed the following transactions during the first half of December: Dec 2   Received \$18,000 cash and gave capital to Draper. 2   Paid monthly office rent, \$550. 3   Paid cash for a Dell computer, \$1,800. This

51. Foreign languages

Thank you very much for checking this part on scientific English. Here is the last part. 1) The superconductors are also characterized by the so called Meissner-Ochsenfeld Effect. When a superconductor is put in (into) a magnetic field, it produces a

52. physical edu

Excessive consumption of ______ has been one factor linked hypertension a. sodium b. vitamin supplements c. protein d. phytochemicals e. carbohydrates is it C

53. college ststistics

given x =237 u =2.00 and s=12.3 find z

54. physics

If a concave mirror with a radius of curvature of 0.93 m has an object placed at 0.37 m in front of it, what is the mirror's focal length? Round your answer to 3 decimal places.

55. Reimbursement methodologies

If you are billing outpatient claims, you are probably using (a)CMS 1450 (B)UB-40 (C)CMS1500 (D)UB-92

56. Englsh

1. Let's break up the wall. 2. Let's break the wall. (What is the difference between the two sentence?) 3. He wanted to get some rest. 4. He wanted to take some rest. (Are both OK? 5. He got rest after working hard. 6. He took a rest after wroking hard.

57. calculus

factory worker wages, according to data released by city chamber of commerce, the weekly wages of factory workers are normally distributed according to the probability density function f(x)= (1/50√2π)e^((-1/2)((x-500)/50)^2) find the probability that a

58. Geography

Taken as a whole, what would you say is the single most pressing problem found in Latin America or South America? What possible solutions can you develop? My Answer: In my opinion, the most pressing problem would have to be the management of poverty. South

59. algebra

The area of a state is 7 times the area of another state. the sum of the areas are 32,000,000. what is the area of each state

60. algebra 2

pleas help me with my home work 00703600

61. Chemistry

how do you calculate the mass of sodium ions in a 500ml bag of saline solution concentration 20.0 mmol l-1. A 100ml aliquot is analysed using silver nitrate, the precipitate weighs 0.2866g

62. English

I need a real life example on how growing up or maturing involves seeing and experiencing pain. We used examples from this book we were reading but I also need a real life example and I can't think of one

63. Math

when do you need to regroup in subraction and explain the regrouping steps

64. Math

when do you need to regroup in subtraction and explain regrouping steps?

65. pre-albegra word problem

I need to write a verbal rule to determine the total monthly cost of my cell phone, assuming I go over the 200 minutes. basic cell phone rate plan cost \$29.99 a month plus 45 cents per minute for every minute over 200 minutes during the month.

which of the following would be the Least appropriate in the closing paragraph of a negative message? A)"Let us know if model #A01 would be a suitable substitution." B)"Our layaway plan will enable you to purchase all the clothes the children need for

67. English/Marketing

Hello I have a job interview question I want to get right. Below is the note I composed. How does it sound? Dear Mr. Smith Thank you for your interest in Apt. 1107, I am glad the apartment met your criteria. If you have any other questions please feel free

68. math

Marna wants to find the values of x for which the funciton below will have a value of 10. f(x) = x^2 + x - 20. Which of the following shows the correct factorization of this funciton for f(x) = 10. A. (x + 5) (x + 4) = 10 B. (x - 5) (x - 4) = 10 C. (x + 6)

69. MATH

Adrienne had a party at a local bowling alley. She spent seventy-five dollars for the lane and five dollars per person for shoes. Let c be the total cost of the lane and shoes, and let f be the number of friends at her party. Write an equation to represent

70. Reimbursement methodologies

What do you need to determine a faciliyi's CMI

71. Math

Which expression is equivalent to the given expression? 12(x – 17) A. 12x – 12 • 17 B. 12x – 17 C. 12x – 29 D. 12 + 12 • 17

72. Math

factor out the greatest common factor -2p+40

73. Math

Solve. Round to the nearest one decimal. 7x^3 + 5x^2 - 5x - 3

74. Study tips needed for exam!!

How can i study for my exam in one day? There are five chapters and i am on my first. Do you have nay study tips for me. Thanx

75. math

what is the value of the discriminate of 11x^2-2x-10=0? then describe the soulution.

76. statistics

98,99,99,103,101,102,104,89,87,90,90 Find the 25th and 75th percentiles. Within how many standard deviations of the mean is the value 102. Find the interquartile range.

77. Chemistry

How is the water drawn into the polymer? How is the polymer held in the polymer? What are the intermolecular bonds between the polymer and the water? A diagram again may help. What factors affect the effectiveness of SAP?

78. maths

You get a wage increase of 5% plus an extra five pounds per week. Your present wages are 250 pounds per week. What will your new weekly wage be wage be?

79. Math

Solve the inequality: (5x + 4)(x - 4) < 0

80. math

There are 30 kids in a class. 3/5 are girls, how many of the are girls

81. math

How To solve Polynomials?

82. Economics

What is usually the relationship between a bond’s rating and the interest rate a company pays to buyers? A. The rating is the same as the rate. B. The higher the rating, the lower the rate. C. There is no relationship. D. The higher the rating, the

83. English

i not get what this poem mean, wat features do it tell of tyger? i say that it say it be fearful powerful. and i not get these lines, it have to be what poet tell abt nature of this animals creator what immortal hand or eye could frame thy fearful

84. physics

A blue minivan weighing 20,000 Newtons and traveling east at 100 km/hr on a familiar turnpike approaches the toll booth. What is the kinetic energy (in joules) of the minivan just before the brakes are applied? Assume g = 10 m/s/s.

85. Math

damn i cant post a drawing..there r 2 cubes, cube x and cube y and the length of the cube x is 12cm. A) find the volume of cube x. B) if cube y has a volume equal to 1/8 of the volume of cube x, find the length of its edge.

86. maths

how to write 4th june 2012 in letters without using numbers

87. algebra

4x+10y=28 6x+7y=6

88. Physical Edu.

Insoluble fiber in foods, especially plant sources, decrease colorectal cancer because they do not break down in the intestines: True OR False Is it TRUE?

89. Calculus

Evaluate the integral: 16csc(x) dx from pi/2 to pi (and determine if it is convergent or divergent). I know how to find the indefinite integral of csc(x) dx, but I do not know how to evaluate the improper integral.

90. English

I'm writing a paper about life as a sophomore in 2012 in the style of Charles Dickens ("It was the best of times, it was the worst of times") and I'm not sure if this sentence makes sense or is grammatically correct. Please help! It is a year of waiting;

91. Reimbursement methodologies

You perform the billing for a skilled nursing facility,you are probably using which system?

92. chemistry

convert a pressure of 1.75 atm to kpa

93. chemistry

convert a pressure of 1.75 atm to kpa

94. Math

Determine the real roots of the equation: (5x^2 + 20)(3x^2 - 48) = 0

95. Geometry Math

If point M is the center of a sphere with the coordinates (-1,3,2) and point T is a point on the surface of the sphere with the coordinates (0,5,1), what is the radius of the sphere?

96. Math

Write the percent as a fraction in simplest form. 66 3/10

calculate the concentration of silver nitrate in mol/L M x V =0.2 average Vw in ml of 2.23 2.26 2.43 MxVw = Mwx20 Mw=? mol/L chloride in water sample = mmol/L? =?g/L chloride in sample =?ppm chloride in water sample

98. HIS 103

Ms. sue I am sorry about posting that question twice. I didn't mean too, again I am very sorry! You have a bless night.

99. Science - help!!!

why there are fewer lions than gazelles on the african plains????

100. Calculus

If y=Root of(logx+root of (logx+root of logx.........infinty)...prove that dy/dx=1/x(2y-1)

101. algebra 1

how would i simplfy 16^3/2

102. Economics

What happens to the percentage of an income that is taxed when income rises and the tax is a proportional one? A. The percentage of tax falls. B. The percentage of tax rises. C. The percentage rises and then falls. D. The percentage of tax stays the same.

103. math

Oops,first question was wrong. Sorry. There are 30 kids in a class room.3/5 of them are girls. How many are boys and how many are girls.

104. calculus

find the taylor series f(x)1/2(e^x + e^-x) ;x=0

105. home economics

What are the diff.tools, equipments,materials used for farm crop production.

timmy is sitting at rest, he has50j ofGPE .then his dad gives timmy a big push, and when his dad let go timmy has 75J of GPE and 125J of KE a) Befoe his dad pushes him GPE____ KE___ TE____ B) Immrdialty after his dad pushed him GPE_____ KE____ TE___ C)

107. geometry

Expected value If on a \$1 bet, Paul Goldstein's expected value is 0.30,what is Paul's expected value on a \$5 bet?

108. PHI 103 Informal Logic

I need major help with writing my final research paper. research paper are over whelming to me to information is need and its has to bee 6-8 i don't have that much to say.This is the topic "Is the death penalty just and applied fairly"?

109. math

there is 1 teacher for every 20 students. which of the following is not a proper way to express the teacher-student ratio?

110. pHYSics PLEASE I NEED HELP

When i was in elementry school the gym teacher had this big long rope with a ball at the end in class and the teacher would spin the ball around on the floor and whenever the ball come to us we had to jump anyway. A) What was the direction of the force

111. physics PLEASE I NEED HELP

Roy has a bowling ball in the trunk of his car when he goes around corners the ball rolls across the truck and A) if roy turns to the right which wall of the trunk will the ball hit? b) Once the ball hit the wall of the trunk the wall exerts a force on the

112. Foreign languages

Could you please check if this paragraph is possible in scientific English? Thank you, Writeacher. 1) Superconduction consists of a particular physical phenomenon which characterizes only superconductors. 2) These materials become superconductors when they

5) suppose in the previous question when timmy is sitting at rest he has 40j of GPE then his dad geves timmy a push when his dad lets go Timmy has 60j of GPE and 12J of KE a) befor his dad pushed him GPE= 40J Ke= 0J TE=40J b) immedialtey after his dad

bobpursley did i do the math problem right if not could u do it for me .thanke

115. physics NEED HELP

5)suppose in the previous question when timmy is sitting at rest he has 40j of GPE then his dad gives timmy a big push when his dad lets go. Timmy has 60j of GPE and 120j of KE A) before his dad pushed him GPE____ KE___ Te___ B) immedalety after his dad

116. physic PLEASE I REALLY NEED HELP WITH THIS PROBLEM

5)suppose in the previous question when timmy is sitting at rest he has 40j of GPE then his dad gives timmy a big push when his dad lets go. Timmy has 60j of GPE and 120j of KE A) before his dad pushed him GPE____ KE___ Te___ B) immedalety after his dad

117. Math

Factor x^3 - 4x^2 + x + 6 with all steps

118. need help in this problem

is this reversible "a dos is a mamamal"? 1. its false 2. true, a animal is a dog if (and only if) it is a mammal 3. true, an animal is a mammal if (and only if) it is a dog 4. true, if an animal is a dog, then it is a mammal

119. physics

timmy is sitting at rest, he has50j ofGPE .then his dad gives timmy a big push, and when his dad let go timmy has 75J of GPE and 125J of KE a) Befoe his dad pushes him GPE____ KE___ TE____ B) Immrdialty after his dad pushed him GPE_____ KE____ TE___ C)

120. Math

Simplify x^2 - 9x + 18/ x^2 - 6x + 9 for all values of x for which the expression is defined. A. x-3/x-6 B. x-6/x-3 C. x-1/x+9 D. x+9/x-1 Please explain how you work this problem in detail. Thanks.

121. Art

Here are the last sentences on the same theme. 1) This important feature makes power lines able to transport electric energy without any problem connected with dissipation of energy. They are useful in aerospace industry because they can keep a big amount

122. Math

Find both the circumference area of the circle whose equation is (x-2)2+(y-3)2=64.

S=x+2in

124. Geometry Math

Lines y= 2x/3+3&y=5 cut the ring formed by circles (x-3)2+(y-5)2=64 and (x-3)2+(y-5)2=25 into four parts. Find the area of each of the four parts.

125. geography

what are land features found in the united states

126. English

1. I gave it up because of the rain. 2. I gave it up because of rain. (Which one is correct? Do we have to use 'the' or not. )

127. algebra 1

solve 5^3/5 . 5^7/10

compare four examples of technologies that are designed to make buildings earthquake resistant

129. college math

Find the value of the expression -128 + 4^ + 6 - 1

130. Math

Find harmonic mean and geometric mean for numbers 120, 130,145

131. english

Which of the following sentences is correctly punctuated? A. The local police asked the F.B.I. to assist with the case. B. Mr. Jones visited the YMCA before becoming a member. C. Mary remembered to buy milk didn't she? D. The company held it's annual party

132. Foreign languages

Writeacher, could you please tell me if 5 and 6 are possible? Thank you. 1) In 1951 an Afro-american woman was admitted to Johns Hopkins Hospital in Baltimore. 2) In those years scientists had been unsuccessfully trying to grow malignant human cells

133. algebra

You need to hire a part-time associate to work 30 hours a week in your store. You have \$250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid \$9.00 per hour. Your

134. Art

I left out the following sentences. Thank you, Writeacher. 1)He writes to his mum about the incident. 2) He is critical of the war and turns against those who think that it is glorious and fitting to die for one's country. 3) His friend dies because he is

135. History

How did containment and U.S. preoccupation with communists lead to the use of military force in Vietnam? Analyze the conditions and constraints that made Vietnam a “quagmire” for American forces and policies.

136. Biology

how many ATP molecules are released during cellular respiration? or what is the value of1 ATP molecule?

137. geometry

In the figure below, find x if segment AB = 12 cm and segment AD = 2x + 6

138. Math

how do you subtract hundreds?

139. math

Susan's back yard is rectangular with dimensions 39 yd. by 71 yd. Carlos's back yard is rectangular with dimensions 30 yd. by 50 yd. How much larger is the area of Susan's back yard than the area of Clarlos's back yard?

140. Foreign languages

Thank you very much, Writeacher for checking my paragraph. Here is the last part. 1) Six months after being diagnosed with cancer, she was dead. HeLa cells have had a fundamental importance in scientific research. 2) Her living cells, which survive to this

141. physics

Explain the term adhesion and cohesion

142. math-measurment

321 cm = ___________m 14 ft 4 in = ____________in 2 mi = ____________ft 5.3 km = ___________m __________mi = 7,040 yd

143. need help in tis problem

are two lines that intersect at right angles are perpendicular?

144. math/116

solve x+y=7 x-y=5 using elimination method

145. math

Describe how you can use a number line to order the fractions 3/7, 5/7 and 1/7 from least to greatest.

146. physical edu

antioxidants help protect cells from damage that can occur throughout life? True or False is it False