# Questions Asked onNovember 8, 2009

1. ## Honors Chemistry

"How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2? N2 + 3H2 ---> 2NH3 ==> 28 g N2 x (1 mol N2/14.0 g N2) x (2 mol NH3/1 mol N2) x ( 17.0 g NH3/ 1 mol NH3) = 68 g NH3 25 g H2 x ( 1mol H2/2.0 g H2) x (2 mol NH3/3 mol H2) x

2. ## Math

Find the variance for the given data. Round your answer to one more decimal place than the original data. {8.5, 4.5, 8.8, 6.9, 5.3}

3. ## Physics

Piano tuners tune pianos by listening to the beats between the harmonics of two different strings. When properly tuned, the note A should have the frequency 440 Hz} and the note E should be at 659 Hz}. The tuner can determine this by listening to the beats

4. ## Calc

A sample of a radioactive substance decayed to 93.5% of its original amount after a year. a) What is the half-life of the substance? ? years (b) How long would it take the sample to decay to 10% of its original amount? ? years

5. ## Language Arts

What follows a linking or action verb?

6. ## Chemistry

Which pair of molecules has the strongest dipole-dipole interactions? a- CO2 and CO2 b- CO2 and CH4 c- NH3 and NH3 d- NH3 and CH4 e- CH4 and CH4 Would it be C?

Prove that: 2sinxsiny = cos(x-y) - cos(x+y)

8. ## chemistry

Which one of the following is NOT a Lewis acid-base reaction? 1. ) Ca + S --> Ca2+ + S2- 2. ) BeF2 + 2 F- --> BeF42- 3. ) H+ + -O-H --> H-O-H 4. ) NH3 + BF3 --> H3N-BF3 i thought it was 1...but im not sure...but i know that 3 & 4 are definatly right.

9. ## Marketing (Help Check)

24.Which of the following is characteristic of the organizational buying process? A)Multiple parties participate in purchase decisions. B)Negotiation between buyers and sellers is commonplace. C)Online buying over the Internet is widespread. D)Buying

10. ## Physics

A 1.5 kg block is connected by a rope across a 50-cm-diameter, 2.0 kg, frictionless pulley. A constant 10 N tension is applied to the other end of the rope. Starting from rest, how long does it take the block to move 30 cm?

11. ## math

The Moon orbits Earth every 27.3 days. Determine the angular velocity of the Moon, in degrees per day and in radians per day. The radius of the orbit of the Moon is about 384 400 km. How far does the Moon move along an arc of it's orbit every?

12. ## Economics/Algebra

A monopolist has a constant marginal and average cost of \$10 and faces a demand curve of QD = 100 - 10P. Marginal revenue is given by MR=100-.20P. a. Calculate the monopolist's profit maximizing quantity, price, and profit. b. Now suppose that the

13. ## Math

The table below provides a frequency distribution for the winner of the Davis Cup during the period 1977-1994. Winner of Davis Cup Frequency United States 6 Germany 3 Czechoslovakia 1 Australia 3 France 1 Sweden 4 Which measure of center, the mean, the

14. ## Physics

A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s.What is the frequency of the standing wave shown in the figure? picture has 6 waves

15. ## Calc

A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest

16. ## Math

Angle x is in the second quadrant and angle y is in the first quadrant such that sinx=5/13 and cosy=3/5, determine and exact value for cos (x+y). I have no idea how to even start this question. Could someone please help me?

17. ## chemistry

Which represents the largest pressure? A)five mmHg B)one atmosphere C)one millimeter of mercury D)one hundred pascals E)five pounds per square inch I tried converting them all to mmHg and I think the answer is B, but I just want to make sure.

18. ## Physic

The back wall of an auditorium is 29.0 m from the stage. If you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall?

19. ## calculus

P /|\ / | \ / | \ on this side there is an / | \ arc with A(θ) in the / | \ middle. the B(θ) /θ | B(θ)\ triangle is not equal O -------------- R to the θ triangle. Q the figure shows a setor of a circle with central angle theta. Let A(θ) be the area

20. ## Psychology

Can anyone tell me if I answered this correctly? Please help. 2. Assignment: Erikson’s Timeline • Write a 350- to 700-word paper that explains in which of Erikson’s eight stages of life you believe you are currently. • • Explain why you think you

21. ## Social Studies 11

Why did the british fight against the turks in 1915?

22. ## Chemistry

on heating the hydrate CaSO4*2H2O, how many moles of water should be driven off per mole of hydrate? 1 mole?

23. ## Chemistry (physical)

At room temperature (25 degrees C) butane is a mixture of 72% anti and 28% gauche conformations. Calculate the difference in energy between the gauche and anti confromations. This is how I calculated it but I am not sure I am right: Boltzmann equation:

write a spelling word that fits each clue 4.a furnace could provide this.

25. ## excretion

Question: which is an example of excretion? a) release of sweat from the sweat glands b) removal of carbondioxide from the lungs Please tell me what is the answer. I thought both urea(from the sweat) and CO2 are products of excretion? In fact, my textbook

26. ## AP Chemistry

What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a. potassium perchlorate b. cesium nitrate c. calcium iodide

27. ## chemistry

Perform each of the following conversions, being sure to set up clearly the appropriate conversion factor in each case. 2.23 m to yards Am I supposed to round the answer? I don't think I am, but the answer I get is insanely large.

28. ## Clinical Calculations

What weight of NaOH would be required to prepare 3000 ml of a 2.5M solution?

29. ## Physics

Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the eardrum is about 8.4 mm in humans. How much energy is delivered to your eardrum each second when someone whispers 20dB a secret in your ear?

30. ## social studies

Why was the Bill of Rights added to the Constitution?

31. ## English Help

R for run on sentence, CS for comma splice, F for fragment, and C for correct sentence. Some correct sentences can be punctuated more effectively, however. Check over my anwers if i get it wrong please correct me. Thanks! 1. Carlos took the job and he was

32. ## Chemistry

Is the reaction involved in dissolving ammonium chloride in water an endothermic reaction or exothermic reaction? Why? I am pretty sure it is endothermic, but I am just not sure why ?

33. ## Physics121

The back wall of an auditorium is 29.0 m from the stage. If you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall?

34. ## algebra

I am real stuck, if i am collecting like terms would 19z+z+10/19z be 10/19+21z

35. ## Social Studies

Which of the following was not a radical social movement in the nineteenth century? A) Utopian socialism B) Transcendentalism C) Spiritualism D) Naturalism

36. ## Social Studies

Which of the following was not a radical social movement in the nineteenth century? A) Utopian socialism B) Transcendentalism C) Spiritualism D) Naturalism

37. ## calculus

A fence 4 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

38. ## biology

skin cells seem to fit together like pieces of a jigsaw puzzle how is this arrangement of cells helpful to an organism?

39. ## Calc

If x2 + y2 = 100 and dy/dt = 3, find dx/dt when y = 8.

40. ## Honors Chemistry

On the same subject as before with the limiting/excess reagent stuff -- can someone please check my answer to make sure I'm doing it right? Thanks sooooo much!! :DD 3. Mg + 2HCl ==> MgCl2 + H2 -- What mass of hydrogen at STP is produced from the reaction

41. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

42. ## Payroll Accounting

Help with my Payroll Accounting Final Project. Class AC122-05. Please. I am so lost.

43. ## Chemistry

what is the lewis structure for CH3?

44. ## geometry

What is the area of a trapezoidal piece of land if the shorter parallel side is 52 ft long, the other parallel side is 130 ft and the altitude of the trapezoid is 75 ft ?

45. ## chemistry

sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than hydrogen then hydrogen is produced instead of the metal at the positive electrode.

46. ## Calculus

Suppose f(x)= e^(-1/x). Graph this function in the window -5(

47. ## Enthalpy of a Phase Change

How many grams of ice at -20.1C can be completely converted to liquid at 9.9C if the available heat for this process is 4.58×103 kJ? For ice, use a specific heat of 2.01 J/(g*C) and Heat of Fusion is = 6.01 kJ/mol.

48. ## Physics

A 72 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 13 m, and falls a total of 38 m. Calculate the spring stiffness constant "k" of the bungee cord, assuming Hooke's law applies. Calculate the maximum

49. ## Economics for Global Manager

If the current exchange rate is US\$1 equals € .70, how much did you win in US dollars? Suppose that the interest rate in Irish banks is 2% for a one year CD. In the USA, the rate is 4% for a one year CD. If you left your winnings in Ireland, how many

50. ## checking answers 4 algerbra

1. simplify by removing the parenthses and collecting like terms. 83q - (39q-38)=44q+38? 2. solve for y---z=ym answer y=z/m? 3. divide if possible -6/"over" 17 divided by (-5/"over"17)=undefined? 4. translate to algerbirc expression the sum of c and n=

Rita won \$60 million lottery. She is to receive \$1 million a year for the next 50 years plus an additional lump sum of \$10 million after the 50th year. The discount rate is 10%. What is the present value of her winnings?

you owe \$30,000 payable at the end of five years, what amount should your creditor accept in payment immediately if he could earn 11% on the money?

53. ## Ap english

I have to answer a few questions about the essay Ralph Waldo Emerson From Education. (a copy of it is provided on google when you type in -what does emerson mean when he says "nature loves analogies, but not repetitions"?- ) If you have read it or can read

54. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

55. ## AP Chemistry

When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 5.0 M HCI is required to react completely with 3.00 g of magnesium?

56. ## English

1. I have not broken my leg. 2. I have broken my leg. (result) 3. I have never broken my leg. #2 is result. What about #1 and #3? Are #1 and #3 result in the present perfect tense? Or are both 'experience'?

57. ## Chemistry

I don't understand how to answer this questions. I thought molecular weight was adding up the atomic weight of each element in a molecule...? If a 0.614g sample of a gas maintains a pressure of 238 mmHg when contained in a 1.0L flask at 0.0 degree Celcius,

58. ## Chemistry

Which pair of molecules has the strongest dipole-dipole interactions? a- CO2 and CO2 b- CO2 and CH4 c- NH3 and NH3 d- NH3 and CH4 e- CH4 and CH4 how do you figure out the answer to this question?

A hospital has 30 labor rooms, 15 combination labor and delivery rooms, 3 delivery rooms, and 1 special delivery room reserved for complicated births. All rooms operate around the clock. Time spent in labor rooms varies from hours to days, with an average

60. ## algebra 2

Solve the given system of linear inequalities by graphing: x+y>4 x-y

61. ## English

1. Is Eminem a male name or a femalee name? How do you pronounce "Eminem." 2. When you give birth to the baby, you will feel painful. 3. When you deliever the baby, you will feel painful. 4. When you are delivered of the baby, you will feel painful. (Which

what is the velocity of someone running if he takes 120 seconds to run 200m

63. ## Math

Use linear approximation, i.e. the tangent line, to approximate sqrt[3] { 8.4 } as follows: Let f(x) = sqrt[3] x. The equation of the tangent line to f(x) at x = 8 can be written as y=mx+c where m=1/12 b=4/3 find the approximation for sqrt[3] {8.4}

64. ## Socials-Ms. Sue

Ms. Sue this is the memo: Sorry, but I had a tough time on it, I tried to come up with alot, but the ones I did, I don't think they're right. I really need your help Ms. Sue, this is pretty hard. To: Napoleon Bonaparte From: Sara, Senior Advisor Subject:

65. ## grammar

Label each clause subordinate or independent. 1. If you visit the city of Chicago.subordinate 2.the Art Institute of Chicago is quite famous independent 3.While the Chicago White Sox play in Comiskey Park. subordinate 4.after the sears Tower was built

66. ## History

Currently, Who is the USA president?

67. ## algebra

does 13x^2+13y+8x^2 collect like terms =21x^2+13y

68. ## Algebra

solve each inequality algebraically and give the answer by using interval notation. 5-9y

69. ## Scoial Studies

What were the effects of The Trojan War in its time and today? Does anyone know any websties with this info? Thanks so much!:)

70. ## Algebra

Why is television called a communications medium?

71. ## SCIENCE

10 EXAMPLE OF SOLUTION AND COLLOIDS

72. ## math

using the commutative law the equivalent expression for k+ts would be ts +k am I right?

73. ## maths

if f(x)=(x^2)(e^x) prove by induction that the nth derivative is (x^2 +2nx +n(n-1)(e^x) thanks

74. ## chemistry

if you heat 15.00g of the hydrate CaSO4*2H20, and drive off the water, what is the weight of the anhydrous salt remaining? How do I go about solving this?

75. ## alison

How do i find the points of inflection for: f(x)= (1/12)x^4 -2x^2 +15 The answers are (2, 25/3) and (-2, 25/3) but i don't know how to get the answers. Can someone show me step by step?

76. ## math

an extremely volatile substance, Ofnetite, has a half-life of 25 minutes. Find the percentage decrease of this substance in the first two hours.

77. ## math

a train left podunk and traveled west 70 km/h. two hours later, another train left podunk and traveled east at 90km/h. how many hours had the first train traveled when they were 1420 km apart?

78. ## calculus

f(x)=2x+8x^-1.For this function there are four important intervals: (-infinity,A],[A,B),(B,C), and [C,infinity) where A,B and C are either critical numbers or points at which f(x) is undefined.Find A,B and C.

79. ## algerbra

1. -1+1=0? 2. 2x(-4)x(-4)x(-2)=-64 3. multiply (-16)(-10)=160? 4. determine if -6 is a soultion of the equation 3x=-18? yes -6 is the soultion?

80. ## English

How are the family

81. ## History

Can you please explain to me what this means. Chief Justice John Marshall, in Cherokee Nation vs. Georgia held that the court had no juisdiction, under the U.S. Constitution, to deal with this issue because the Cherokees were a domestic, dependent nation-

82. ## physics

A toy car runs off the edge of a table that is 1.683 m high. The car lands 0.3309 m from the base of the table. The acceleration of gravity is 9.8 m/s2 . How long does it take for the car to fall? Answer in units of s. - What is the horizontal velocity of

83. ## science

why doesn't solute added to a saturated solution dissolve

84. ## chemistry

Stelco has been recently legislated to reduce total SO2 emissions from iron smelting operations. Select the most effective chemical reagent to desulfurize Stelco’s gas emissions as a strategy to minimize the environmental impact of acid rain in eastern

85. ## Texas History

I need help trying to write my own declaration of independence

86. ## ACCOUNTING

Deer Valley Lodge, a ski resort in the Wasatch Mountains of Utah, has plans to eventually add five new chairlifts. Suppose that one lift costs \$2 million, and preparing the slope and installing the lift costs another \$1.3 million. The lift will allow 300

87. ## chemistry

Consider three one-liter flasks labeled A, B, and C filled with the gases NO, NO2, and N2O, respectively, each at STP. Which flask contains 1.0 mole of gas?

88. ## Math

For a box and whisker plot, if you have an even amount of numbers which number would the mean be. 3,4,4,5,5,6,8,10,10,12,15,18 Is it 6 or 8 Thank you

89. ## Math/algebra

The question is 9xy --- 15x I answered 3y --- 5 is this right?

90. ## Math

By what percentage does the average price increase from 1994 to 1995? Obtain a truncated version of the graph by sliding a piece of paper over the bottom of the graph so that the bars start In the truncated graph, by what percentage does the price appear

91. ## Calculus

R(x)= { ax^2, from A to B { bx+c, from B to C B is 1000 feet horizontally from A and 100 feet higher. Since the road is smooth, R'(x) is continuous. What is the value of b?

92. ## English

I have to write a discursive essay on how junkfood leads to obesity and my views about eating well and keeping fit. i just need a few hints about how i should start.

93. ## chemistry

A gaseous mixture of and contains 35.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 565 ?

94. ## Math

What is the difference between the range and the interquartile range? I can't find a difference

95. ## Math

Use a centimeter ruler and separate sheet of paper to draw am 8 cm. by 6 cm. rectangle. List its perimeter on the table below. Then cut out the rectangle and also cut along the diagonal as shown below in the picture. Use the your two pieces to create 4 new

96. ## CMC220

how each new medium affected news content and delivery, including how people engaged with news and how the media that preceded it adapted their content and delivery. Be sure to discuss newspapers, magazines, radio, TV, and satellite and Internet services.

97. ## Calc

A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a culture is 59 cells. (The tolerance is 1% unless your

98. ## Calculus

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 1.5 m/s, how fast is the length of his shadow on the building decreasing when he is 4 m from the building?

99. ## Math

can you please check my answers evaluate (-5a)^2 and -5a^2 when a =5 625 for both 1-12.64=-11.64 (-14)/(-7)=2 using multiplying by 1to find an expression equvialnt to 18/19 with a denomanator of 171z?dont simplfy type a fraction one day the temperture

100. ## math

a nutrition center sells two types of health foods to mountain-climbing teams, Trailblazer Mix and Frontier Mix. Each package of the Trailblazer Mix sells for \$9.75. Each package of the Frontier Mix sells for \$9.50. The center wishes to maximize its

101. ## chemistry

A gaseous mixture of O2 and N2 contains 35.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 565 mmHg?

I want to send path help an actual photo I took that's attached onto the e-mail. I can't do that on that website. Is there another website where I can e-mail a teacher a photo?

103. ## Algebra

Consider the algebraic expression E=(2x+y) (5a-b)^3

104. ## economics

apples cost £2 and pears cost £4. For John the marginal Utility (MU) of the last apple consumed was 4 and MU of pears was 12. For Paul MU of last apple was 3 and MU of last pear was 6. Which person is not maximising utility and how can you tell? What

105. ## antiderivatives

find the equation of f(x) f''(x)= 2 + x^3 + x^6

106. ## Math

determine weather 10 is the solution of the equation x+10=36 is 10 the solution no use multiplcation principle 10x=-90 -9 3[7-9{6-2)]= -87 find -x when x=-62/83*= 62/83

107. ## physics

A ball is thrown from the top of a building upward at an angle of 66 ◦ to the horizontal and with an initial speed of 16 m/s. The ball is thrown at a height of 53 m above the ground and hits the ground 33.2074 m from the base of the building. The

108. ## checking answers 4 algerbra

1. What percent of 120 is 48? 57.6%? 2. collect like terms. 17T + T + 15/13T= 249/13T? 3. solve using the principles together. 3x-6=12 i am solving for x=6? 4. solve using the addition principle. -37+n=19 i am solving for n= -18? 5. solve using the

109. ## science8 intergeted

what is lubricant and orbital motion

110. ## definition

what word is similar to the definition "to make significant" or "to make unique" ?

111. ## social studies

How are the counties of Santa Rose and Escambia the same?

112. ## Algebra

Consider the algebraic expression E=(2x+y) (5a-b)^3

113. ## Grammar

What's wrong with the following sentence? He was in trouble for acting like a tomfoolery.

114. ## Economics/Math

Airline pricing is a good example of price discrimination. Airlines set different prices for first-class and excursion. Suppose the economics division of a major airline company estimates the demand and marginal revenue functions for first-class and

115. ## algerbra

1. use a commutative law to find an equivlant expression f+sr? sr+f? 2. determine which real number corresponds to the situation. The record high tempature for a date is 97.8 above zero. The cooresponding number for this sentence is 97.8? 3.Translate to an

116. ## algebra

solve the inequality (x-3)/10 >_ (greater or equal to) (x-2)/3 how would you do this? I don't understand how to do the fractions

117. ## geometry

A large, circular building has a diameter of 126 feet. Correct to the nearest whole foot, what is the circumference of the building?

118. ## antiderivates

find f(x) f'(x) = (x^2-1)/x^(-1)

119. ## health care

I am doing a essay and am haivng a hard time finding in goggle search just when computerized pharmacy came about. Any Idea were to go for this?

120. ## geometry

A large, irrigated crop circle is 600 meters in radius. Correct to the nearest tenth of a hectare, how many hectares of land are contained in this circle.

121. ## social studies

what are coordinates for the point marked j

122. ## Accounts

on july 25 Hamilton company accountatn prepared a check for august rent. the landlord received the check on the 31 of july and cashes iton the 2 of august. when should the rent transaction be recorded

123. ## geometry

A football field is 130 yards long and 70 yards wide. If sod costs \$0.80 per square foot to lay, how much will the owners have to pay for sodding the entire field?

124. ## geometry

A propane tank is in the form of a cylinder with two half-spheres, one on each end. The radius of the cylinder is the same as the radius of each half-sphere. What is the volume of a propane tank of cylindrical length 12 ft and radius 5 ft, correct to the

125. ## visual

I can't seem to describe the placement of my objects in my stilllife arrangement. The objects are placed at an angle, which is almost horizontal. Does it relate to the principles of art?

126. ## calculus

1 pt) Find the length of the curve defined by y=1/8(x^2−8ln(x)) from x=3 to x=5

127. ## geometry

A rectangular trench is to be dug which is to be 240 ft long, 90 ft wide and 9 ft deep. A large dump truck can carry 20 cubic yards in a load. How many truck loads will be required to remove the dirt from this trench?

128. ## geometry

Using 3.14 for p, find the volume, correct to two decimal places, of a sphere which is 4.5 ft in radius.

129. ## geometry

Using 3.14 for p, find the volume, correct to two decimal places, of a cylinder which is 4 ft in radius and 10 ft high.

130. ## geometry

Using 3.14 for p, find the volume, correct to two decimal places, of a cone which is 4 ft in radius and 24 ft high.

131. ## Algebra

I have to find the vertex, axis of symmetry, and x intercepts of x^2-x+(5/4). I put it in standard form as -(x+-.5)^2+1.5. Thus, the vertex would be .5, 1.5. But the book's answer is 1/2, 1. How did they get this?

132. ## geometry

Which of the following angles is the supplement of 132o ?

133. ## geometry

The measures of two of the angles of a triangle are 47o and 51o. Then the measure of the third angle of the triangle is

134. ## physics

Judy, by chance, spots a potted plant falling outside the window at 3.84 m/s . Further down the same building, Judy boyfriend clocks the pot at 61 m/s .The acceleration of gravity is 9.8 m/s2 .How far apart are the friends? Answer in units of m.

135. ## geometry

If the lengths of two sides of a right triangle are 33 ft and 56 ft, then the length of the hypotenuse must be

136. ## calculus

find f(x) f'(x) = (x^2-1)/x^(-1)

137. ## geometry

If the length of the hypotenuse of a right triangle is 65 cm and the length of one side is 56 cm, then the length of the other side must be

138. ## geometry

A piece of property is in the form of a right triangle with sides which are 300 meters and 1200 meters in length. What is the area of this triangle in hectares, correct to the nearest whole hectare?

139. ## geometry

If there are 7.5 gallons to the cubic foot, and a spherical storage tank has a radius of 19.5 ft, then using 3.14159 for p ,how many gallons, correct to the nearest whole gallon, will the full storage tank hold?

140. ## Accounting

Information related to Hermesch Company for 2010 is summarized below.

141. ## geometry

A trapezoid has a lower base which is twice as long as its parallel upper base. The upper base is 21 cm long. One non-parallel side is 20 cm long and the other non-parallel side is 6 cm longer than the shorter non-parallel side. What is the perimeter of

142. ## Algebra

27-f(x)=1/4x^2-2x-12. Can you show me how to find the vertex and x intercepts, step-by-step? I tried to put it in standard form, with (1/2x-1)^2-13, but my book said that's not the answer. Thanks!

143. ## geometry

If there are 7.5 gallons to the cubic foot, and a cylindrical storage tank has a radius of 21 ft and an altitude of 28 ft, then using 3.14159 for p ,how many gallons, correct to the nearest whole gallon, will the full storage tank hold?

144. ## science

need to write 5 liquid and 5 solids for grade 2

145. ## Algebra

When using -b/2a with functions, should I ignore the negative, figure out b/2a and then put a negative around it? Or should I turn 2a into -2a? Or should I go -b/-2(-a)? Thanks for clearing this up!!!

146. ## history

Garlic- To where did this food product spread from its point of origin? Be sure to include time periods. HELP!! I CANT FIND ANYWHERE

147. ## English

Why is Babylon Revisited called that if it takes place in Paris?

148. ## physics

A 150 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 N. For the first 21 m the floor is frictionless, and for the next 21 m the coefficient of friction is 0.30. What is the final speed of the crate?

149. ## algebra

The tep[erture drpped from -4degree f to -12 degrees f how many degrees did it drop -8 degrees?

150. ## Math

determine weather 10 is the solution of the equation x+10=36 is 10 the solution no use multiplcation principle 10x=-90 -9 3[7-9{6-2)]= -87 find -x when x=-62/83*= 62/83

151. ## Math

can you please check my answers evaluate (-5a)^2 and -5a^2 when a =5 625 for both 1-12.64=-11.64 (-14)/(-7)=2 using multiplying by 1to find an expression equvialnt to 18/19 with a denomanator of 171z?dont simplfy type a fraction one day the temperture

152. ## visual

How do the principles of movement and harmony relate to the placement of my objects in my still life?

153. ## Math

-2/13/(-3/13)=undefined 4(x-6)+2=6(x+2)-6= -14 7x+9x=96 x=6

154. ## Trigonometry

What is the arcsin of (pi/2)?

155. ## geometry

What's another way to write 8 3/4?

156. ## Math

Prove that cos2x=(1-tan^2x)/(1+tan^2x) I can't find any identities that can help me with this. I'm really confused

157. ## checking answers 4 algerbra

1. use a commutative law to find an equivlant expression f+sr? sr+f? 2. determine which real number corresponds to the situation. The record high tempature for a date is 97.8 above zero. The cooresponding number for this sentence is 97.8? 3.Translate to an

158. ## Algebra

How come there are no x intercepts for x^2-x+(5/4)? Can you show me why, please?

159. ## chemistry

a pure compound is put in a polarimeter and the optical activity is measured to be 0 º. what do you know about the compound?

160. ## chemistry

a pure compound is put in a polarimeter and the optical activity is measured to be 0 º. what do you know about the compound?

161. ## spelling

6.To make a hole in something/You do this.

162. ## thca 230

what types of reform effort is being implented to improve caregivers socialization skills

163. ## art

Am I right with this statement? "The way the shadows created by the coat hangers look very realistic is part of the design quality of my still-life composition."

164. ## science

what is orbital motion and lubricant

165. ## algebra

solve the compund inequality. 6>-4x+5 or 7≤-2x+4

166. ## health care

are health care companies and medical companies the same?

167. ## Science

Explain why air as the incident medium allows us to find the unknown indexx of refraction of the medium. (If the incident medium is NOT air, nR will be impossible to determine)

168. ## CHN

WHAT DOES CHN STAND FOR?

169. ## Science

Compare the angle of refraction with the angle of incidence for all angle of incidences greatter than 0 degrees. what relationships do you notice between the angle of incidence and the angle of refraction? explain why you expect this relationship to be

170. ## Socials-Ms. Sue

To: Napoleon Bonaparte From: Sara, Senior Advisor Subject: Continental System 1. Advantage for Britain: None Disadvantages for Britain: Loses money because of trade embargo from Europe *will not be able to trade with other countries *Won't be in debt

171. ## Math for educators

Help please! What is the domain and range for the following numbers 2.68, 2.58, 2.38? Thank you

The manufacturer of a propeller for a small aircraft mandates a maximum operating angular velocity of 300 rad/s. Determine whether it is safe to install this propeller on an aircraft whose engine is expected to run at a maximum of 2800 rpm.

173. ## science

what do you notice about the ratio (sin θi/ sin θR) for all angle of incidences greater than 0 degrees? explain why you would expect this to be true?

174. ## ELA

what could you say if you want to give a little intro about the book

175. ## hhs265

The following two financial statements—a statement of activities (profit and loss summary) and a statement of financial position (balance sheet)—are for the Council on Social Work Education for fiscal year 1998. (See Tables 5.3 and 5.4.) Review these

176. ## maths

of 50 students, 40 are in the football team and 30are in the cricket team. how many are in both if six do not play either.

177. ## science

Explain why the index of refraction of an object is a physical property?

178. ## checking answers 4 algerbra

1. What percent of 120 is 48? 57.6%? 2. collect like terms. 17T + T + 15/13T= 249/13T? 3. solve using the principles together. 3x-6=12 i am solving for x=6? 4. solve using the addition principle. -37+n=19 i am solving for n= -18? 5. solve using the

179. ## spelling

5.you might get one if you return a valuable lost item

180. ## visual

do you have an e-mail account bobpursley, so that i can e-mail you a picture of my art? It's a good idea. I'll send it to you.

181. ## Math

-2/13/(-3/13)=undefined 4(x-6)+2=6(x+2)-6= -14 7x+9x=96 x=6

Well, then what's the best homework website for tutors who work via e-mail, so that they can take a look at my art and help me?

183. ## Math

can you please check my answers evaluate (-5a)^2 and -5a^2 when a =5 625 for both 1-12.64=-11.64 (-14)/(-7)=2 using multiplying by 1to find an expression equvialnt to 18/19 with a denomanator of 171z?dont simplfy type a fraction one day the temperture

184. ## visual

What does the art term expressiveness mean?

185. ## physics

A car is parked near a cliff overlooking the ocean on an incline that makes an angle of 29.1◦ with the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline and has a

186. ## Math

determine weather 10 is the solution of the equation x+10=36 is 10 the solution no use multiplcation principle 10x=-90 -9 3[7-9{6-2)]= -87 find -x when x=-62/83*= 62/83

187. ## ALGEBRA 1 A

Would someone check my answer please? Thank you. A bank offer two checking plans. the anywhere plan charges 30 cent per check, the accucheck plan cost \$0.64 a month, plus 22cent per check, for what number of checks will the accucheck plan cost less than

188. ## trigonometry

What is the exact value for sin5pi / 12 ?

189. ## calculus

f'(x) = (x^2-1)/x

does anyone have an e-mail account, so that i can e-mail a picture of my art?

191. ## English

1. You have smelled my cakes. 2. I haven't stolen your cakes. (What does each present perfect tense mean? Does each mean 'experience' or 'result' or 'accomplishment'?)

192. ## math

On his 10th birthday, Tom's allowance was doubled. When he turned 12, his allowance increased by \$10 to \$34 per month. What was Tom's allowance before his tenth birthday?

193. ## algebra

does y=11-x ,for x makje x=y+11? -8-14=6 7.4=x-13 answer 6.1 m/m for m =72 and n =9 m/n=72/9=8 -4x+7=39 4x/4x=32/4x 4/32=x8 -10 is greater than -18 -4*(-9)= 36

194. ## Math

BLIND BATS AT HALLOWEEN There were number of bats in a cave. Two bats can see out of right eye, Three bats can see out of left eye, Four can't see out of left eye, and Five can't see out of right eye. What is the least number of bats in the cave & what

195. ## English

In the sentence below, I'm confused about the word 'about'. I'm not sure whether it's a preposition or an adverb. The theater seats 'about' four thousand people.

196. ## chemistry

The following redox reaction occurs in basic aqueous solution. When balanced with the smallest whole number coefficients, what is the coefficient for OH-(aq)? Mn(OH)2(s) + MnO4-(aq) = MnO42-(aq). 1. ) 2 2. ) 3 3. ) 4 4. ) 6 5. ) 8 the answer i got was

197. ## Lord Of The Flies- English

What is implied at the end of the novel? Is this truly a happy ending?

198. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

199. ## nuclear projects

what are nuclear projects?

200. ## english

i need a really quick summary of chapter 2 in lord of the flies.

201. ## social studies

What could I write in an editirial from 1773 about the Tea Act and the Boston Tea Party?

202. ## physics

Janet jumps off a high diving platform with a horizontal velocity of 2.22 m/s and lands in the water 1.5 s later. The acceleration of gravity is 9.8 m/s2 . a) How high is the platform? Answer in units of m.

203. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

204. ## math

A bacteria culture starts with 260 bacteria and grows at a rate proportional to its size. After 4 hours there will be 1040 bacteria. (a) Express the population after t hours as a function of t. this is what i put as my answer but i guess its not right do i

205. ## math

sorry people i have to post this what happened to my psp 2000? what should i do? okay my little cousin threw my psp at the wall then the battery fell out then i put it back in then it wont turn on. what do i do

206. ## American History

Why did the Pilgrims not encounter much Native American resistance upon settling in Plymouth? Is it because of the harsh winter, and the fact that many of the Pilgrims died on the trip? Thanks, Ashley

207. ## algebra

The problem I have is (-14)/(-7) divide if possible or n if undefined -2 -9.5+(3.8)=36.1

208. ## algebra

Marcella and Rupert bought party stuff. Marcella bought 3 packs of ballooons and 4 packs of favors for a total of \$14.63. Rupert bought 2 packs of balloons and 5 packs of favors for a total or \$16.03. Find the price of each and write a system of equations

209. ## Math

Directions: Write an expression for each of the following. Use n for the unknown number Questions: four less than a number a number increased by the same number I am confused, thanks!

210. ## American History

How were the slaves brought to America? I think the slave were brought to America by boat from Africa, is this correct?

211. ## Math

Thanks Ms. Sue, that's what I thought but I was not sure.

212. ## Physics

An airplane traveling 1001 m above the ocean at 125 km/h is going to drop a box of supplies to shipwrecked victims above. a. How many seconds before the plane is directly overhead should the box be dropped? b. What is the horizontal distance between the

213. ## Physics

You row a boat, perpendicular to the shore of a river that flows at 3.0 m/s. The velocity of your boat is 4.0 m/s relative to the water. a. What is the velocity of your boat relative to the shore? b. What is the component of your velocity parallel to the

214. ## Organic Chemistry

Would it be possible to separate hexane (b.p. 68.95 degrees Celsius) from toluene (b.p. 110.6 degrees Celsius) by simple distillation?

215. ## Math

Are these correct? two more than a number and four = 2 + n + 4 ten more than a number plus 3 = n + 10 + 3 three increased by a number minus 5 = n + 3 - 5 six and a number decreased by 7 = n+6-7

216. ## algebra

The problem I have is (-14)/(-7) divide if possible or n if undefined -2 -9.5+(3.8)=36.1

217. ## math

solve the linear equation -10.8x + 1.4 = -47.6 - 1.0x

218. ## Math

does y=11-x ,for x makje x=y+11? -8-14=6 7.4=x-13 answer 6.1 m/m for m =72 and n =9 m/n=72/9=8 -4x+7=39 4x/4x=32/4x 4/32=x8 -10 is greater than -18 -4*(-9)= 36

219. ## Travel and Tourism

I'm going to New York City for a school trip next April. Do you think that when you're in NYC, you'll hear the songs, "Empire State of Mind" and "New York, New York" very often? Empire State of Mind is a really good song to hear, especially when you're in

220. ## Maths

Determine the exact expression for the following. - cos(pi/4)=(x/60) I got x=60/√2 Is that correct? Also, I had a lot of trouble with this one: cos(pi/6)=(z/60) I got z=(√3 (60/√2))/2 That doesn't seem right, but I don'r know what I', doing wrong.

221. ## Ms. Sue

Thanks so much for your help MS. Sue

222. ## math

Put into slope intercept form: (2,5) m=3 I have a quiz tomorow, and i need to make sure im doing the steps right, so then do you do..: ? 2=15+b -13=b y=3x-13 ???

223. ## American history

What parts did the government consist of in the colonies? Who could vote? Does this pertain to the Parlimentary rule? And that only male, land owners were permitted to vote in the colonies?

224. ## grammar

Tell if the sentences, are phrase write phrase if it is a clause, write independent or subordinate. 9 Before settlers arrived .(phrase) 10 In 1794 .(phrase) 11 When it became a city .(subordinate) 12 Chicago had its first railroad.(independent) 13 Before

225. ## earth science

Describe the change in duration of insolation from the Equator to the North Pole A) In the winter b) In the summer c) on the Equinox

226. ## earth science

Describe the change in duration of insolation from the Equator to the North Pole A) In the winter b) In the summer c) on the Equinox

227. ## checking answers 4 algerbra

1. use a commutative law to find an equivlant expression f+sr? sr+f? 2. determine which real number corresponds to the situation. The record high tempature for a date is 97.8 above zero. The cooresponding number for this sentence is 97.8? 3.Translate to an

228. ## macroecon

If the MPC equals.7 and the MPI equals .1 then the varible net export spending multiplier equals?

229. ## math

I was given a problem 9x --- 15x I was told to simplify, I got 3y -- 5 I was told that was wrong. Is it and why?

x2/3=125

231. ## Math

Thanks Ms. Sue!

232. ## science

what is the system of grouping things based on properties?

233. ## childhood

By providing shelves low enough for children to select materials, you encourage the development of A Social skills B solitary play C Cleanliness D Independence I believe that A is the correct answer Which of these factors is most likely to determine the

235. ## Math

does y=11-x ,for x makje x=y+11?

236. ## grammar/Ms Sue

14 during the great fire (independent 15 After industries were rebuilt(subordinate

237. ## 9th Chemistry

Why is there a big space in the periodic table between the 2nd & 3rd periods? The activity of the electrons is related somehow.

Show that tanx = sinx / cosx can be written as tan(x+y) = (tanx + tany) / (1 - tanxtany)

239. ## chemistry

when water is added to anhydrous copper (II) sulfate, what can be observed? pentahydrate forms and it turns blue is that correct?

240. ## college algebra

rectangular region of lenght x and width y has an area of 520 square meters. write the width y as a function of x

241. ## Physic

What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?

242. ## history

In the movie 'Matewan', who wrote the letter to the company? also, who is telling the story in the movie?

243. ## algebra

does x/8=-6 =x=-48?

244. ## Grammar and Composition

I have to write a speech and record it on a tape. Pet Peeve Speec You will create a "Pet Peeve" Speech. A "Pet Peeve" is one of those little every day occurrences that bugs you, upsets you, or frustrates you. You will use the extemporaneous delivery for

245. ## language arts

I am writing an essay for l.a and was wondering what a conclusion needs to have.

246. ## Social Studies

What did the Confederation Congress do to strenghten the United States ?

247. ## social studies

Which document or institution do you think had the greatest influence on the development of the United States? Why?

248. ## Bus 210

write a 200-300 word scenario that depicts joint-stcok company, limited liability company, partnership,sole proprietorship

249. ## algerbra

42 more than n?

250. ## social studies

what was the general attitude of foreign nations toward the new government of the United States? why?

251. ## social studies

Of the problems experienced by the Confederation Congress, which do you think was the most harmful? why?

252. ## math

Use the discriminant to determine how many real-number solutions the equation has. v^2 - 7v + 5 = 0

253. ## Family life

Can you name a short-term health goal

254. ## Algebra

I have to find the standard form of a quadratic function with the vertex of -1,4 and x intercepts of -3,0 and 1,0. What do I do when I have two x intercepts like this?

255. ## social studies

In what ways did the Constitution strenghthen the central government?

256. ## algerbra

Multiply (-16)(-10)? Would it be -26?

257. ## Math

does y=11-x ,for x makje x=y+11?

258. ## Economics/Math

The demand curve for a monopolist is Qd = 500 - P and the marginal revenue function is MR = 500 - 2P. The monoploist has a constant marginal and average total cost of \$50 per unit. a. Find the monopolist's profit maximizing output and price b.Calculate the

259. ## Chemistry

How do you know if a molecule is polar? Would CH2Cl2 be polar or non-polar?

260. ## chemistry

calculate percent water in the following hydrates BaCl2*2H20 14.7%? CaCo3*6H20 51.9% Correct?

261. ## algebra

does x/8=-6 =x=-48?

262. ## Chemistry

given a 10.0g sample of MgCO3*5H2O, what weight of anhydrous magnesium carbonate can be obtained after driving off the water? 48.4%? I wasn't sure how to go about finding the answer to this..

263. ## social studies

How did the two compromises reached during the Constitutional Convention satisfy competing groups?

264. ## Chemistry

a student found the percent water in CaCl2*6H2O to be 45.5%. What's the experimental error? Is it 7.7%?

265. ## social studies

were there any weaknesses in the Constitution? Explain.

266. ## algebra

-(d-45) would that be d+45

267. ## Chemistry

A student recorded the following data for copper sulfate pentahydrate. Weight of crucible and cover (after heating to constant weight), 28.120g Weight of covered crucible plus sample, 31.020g Weight of covered crucible plus sample after heating to constant

268. ## algerbra

1. -1+1=0? 2. 2x(-4)x(-4)x(-2)=-8 or 64 on this one i am not sure if i multiply the absolute value or multiply as is

269. ## Family life

How to set up a short-term health goal.

270. ## social studies

Why were some Americans opposed to the Constitution?

What is the decision facing amazon (the website) and what factors are important in understanding this decision situation?

272. ## Literature

I had to write an essay analyzing a short story. I wrote about The Birds: Daphne du Maurier’s short story The Birds is a story of an old war veteran, his family, and how they battle fierce birds. It starts out on the third of December on the Cornish

273. ## Family Life

how to create a step-by-step action plan.

solve a perfect square trinomial equation. (4x+1)(x+4)=49

275. ## Vista Laptop Help

Okay so I'd do this myself but I only have a desktop with Windows Vista and not a laptop so if anyone with a laptop that has Vista on it could please help me: 1. Open Windows Mobility Center and then mute the speakers. 2. Change the plan settings for the

276. ## Calculus

The circumference of a sphere was measured to be 74.000 cm with a possible error of 0.50000 cm. Use linear approximation to estimate the maximum error in the calculated surface area? Also Estimate the relative error in the calculated surface area.

277. ## math

In math what comes after Tera.

278. ## Algebra 2

Solve By graphing 2x+y=2 2x+y=6

279. ## trig

How do I find the "exact value" for the arcsin of -pi/3 radians?

280. ## algebra 2

Solve by graphing 3x+y=15 3x+y=6

281. ## family life

One more thing Can you give me an example of a goal . Thanks.

282. ## algebra 2

Solve the system by graphing 2x+y=4 2x+y=2

283. ## Grammar and Composition

ok, now that i have my pet peeve, i have to fill out this sheet. (please read my earlier post for more info on the assignment) Pet Peeve--Organizational Sheet Audience: Who will be your audience? You must indicate an audience that your delivery is geared