Questions Asked onNovember 28, 2010

1. 3rd grade math

Marlon has 4 cards, Jake has 4 cards, and Sam has 3 cards. Can you write a multiplication sentence to find how many cards they have in all? Explain

2. chemistry

An electron in a hydrogen atom relaxes to the n= 4 level, emitting light of 138 THz . What is the value of for the level in which the electron originated? Please show each step and the equation.

asked by lorah hilpolep
3. algebra

A plane that carries mail makes a round trip each day from Chicago to New York. It makes 3 intermediate stops on the way to New York and 1 intermediate stop on the way back to Chicago. Suppose you make a graph of the altitude of the plane for one day, with

4. chemistry

a hydrated salt is a solid that includes water molecules within its crystal structure. a student heated a 9.10-gram sample of a hydrated salt to a constant mass of 5.41 grams. what percent by mass of water did the salt contain?

5. Chemistry

1. State specifically how you would make a conclusive test for an iron (III) salt. 2. Which test for iron (II) ions is conclusive. 3. Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify

6. physics help please

a horizontal force of 8.0 newtons is used to pull a 20.-newton wooden box moving toward the right along a horizantal, wood surface, as shown. A. Determine the mass of the box. B. calculate the magnitude of the acceleration of the box.[Show all work,

7. Math

Steven has 9 gold coins that are identical in appearance. However, one coin is counterfeit an weighs slightly less that the others. Using a balance scale, how can he find the counterfeit coin in just two weighings?

8. Chemistry

1. State specifically how you would make a conclusive test for an iron (III) salt. 2. Which test for iron (II) ions is conclusive. 3. Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify

9. chemisty

does NF3 follow the octet rule

10. Algebra

find the unit rate for number of parts manufactured per hour if 1630 parts are made in 6 hours. round to the nearest integer. SHOW ALL WORK.

11. Math

Alfonso got an 87.5% on his test. He got 21 right. How many questions were on the test??

12. physics

A record player is spinning at 32 rpm when the motor is switched off. After 6.8 seconds the angular speed has decreased to 20 rpm. Calculate the frictional torque if the record player can be treated as a solid wheel of mass 2.4 kg and radius 15 cm. A)

13. chemistry

An electron in a hydrogen atom relaxes to the n= 4 level, emitting light of 138 THz. What is the value of n for the level in which the electron originated?

asked by lorah hilpolep
14. chemistry

Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies. (A) 103.1 MHz (typical frequency for FM radio broadcasting) (B) 1015 kHz (typical frequency for AM radio broadcasting) (assume four significant figures)

asked by lorah hilpolep
15. philosophy

"Happiness belongs to the self-sufficient." - Aristotle What does it mean? I don't get it...

16. Trig

assume a pulley has a radius of 12.96 cm. If it takes 18 seconds for 56 cm of belt to go around the pulley, find the angular velocity in radians per seconds

17. Chemistry

the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula

18. math

Results of a survey of fifty students indicate that 30 like red jelly beans, 29 like green jelly beans, and 17 like both red and green jelly beans. How many of the students surveyed like no green jelly beans?

19. English

I need your help to paraphrase the description of the Merchant in Chaucer's Prologue to the Canterbury Tales. I'll include the description at the end. Thank you . 1)The merchant had a forking beard and wore a motley (I need a symonym: multicoloured) dress,

20. math

Mrs. Bollo's second grade class of thirty students conducted a pet ownership survey. Results of the survey indicate that 8 students own a cat, 15 students own a dog, and 5 students own both a cat and a dog. How many of the students surveyed own no cats?

21. chemistry

Which of the following equations does not represent an oxidation-reduction reaction? 3Al + 6HCl → 3H2 + AlCl3 2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3 2H2O → 2H2 + O2 2NaI + Br2 → 2NaBr + I2 Cu(NO3)2 + Zn → Zn(NO3)2 + Cu

22. math 12

A committee of students and teachers is being formed to study the issue of student parking privileges. Fifteen staff members and 18 students have expressed an interest in serving on the committee. In how many different ways could a five-person committee be

23. vaporization lab

A graduated cylinder containing some air is immersed in water. The height between the the water surface and the top of the water inside the graduated cylinder is 106mm. Calculate the correction that must be added to the barometric pressure to find the

24. Chemistry

In a solution of copper(II) chloride, the following equilibrium exists: CuCl42-(aq) (dark green) + 4H2O(l) Cu(H2O)42+(aq)(blue) +4 Cl-(aq) Predict the shift in the equilibrium and draw a graph of concentration versus time for relevant reactants to

25. Trig

A ship leaves its homeport and sails on a bearing of N28degrees10'E. Another ship leaves the same port at the same time and sails on a bearing of S61degrees50'E. If the first ship sails at 24.0 mph and second sails at 28mph, find the distance between the

26. Chemistry

One proposed design for a Mars rover uses a methane gas fuel cell as its power supply. The methane fuel can be made on Mars using a chemical reaction that has been known for over 100-a the Sabatier methanation reaction: C02(g) + 4H2(g) CH4(g) +2H2O(g)

27. Confidentiality in Allied Health

Use Opinion 5.07 and information from other research you conduct to find answers to the following questions. Explain each of your answers. 1. Should corrections be date and time stamped? 2. When should a patient be advised of the existence of computerized

28. chem

Complete and balance each of the following equations. If no reaction occurs, please enter NR in each answer box. (Type your answer using the format CO2 for CO2. Do not leave any box blank. Use the lowest possible coefficients.) ____Al4C3(s) + ___H2O

29. chemistry

A 0.20 M sodium chlorobenzoate (NaC7H4ClO2) solution has a pH of 8.65. Calculate the pH of a 0.19 M chlorobenzoic acid (HC7H4ClO2) solution.

30. chemistry

The heat of vaporization of liquid water at 373 K is 40.7 kJ/mol. The value of the enthalpy change when 2.00 g of steam condenses at 373 K is?

31. chemistry

How does electron configuration of ions derived from representative elements give them stability?

32. chemistry

what is the cation and anion of Na3PO4? thanks

33. Physics

A beaker of mass 1.2 kg containing 2.1 kg of water rests on a scale. A 2.2 kg block of aluminum (of density 2700 kg/m3) suspended from a spring scale is submerged in the water. Find the reading of the upper scale (the spring scale). The acceleration of

34. physics

Suppose you roll a bowling ball at 2.5 m/s across the roof of a flat building. It leaves the edge and strikes the ground 2.0 s later. How high is the roof? How far from the edge of the roof does the ball hit the ground?

35. Physics

Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the

36. Chem

Calculate the percent yield of eugenol obtained considering the fact that clove oil is approximately 16-19 % clove by weight of cloves. isolated eugenol=061g purity of eugenol in clove oil=99.6% (based on clove oil gas chromatograph) Estimate the % yeild

37. Physics

a sled mass 50 kg is pulled along snow-covered, flat group. the static friction coefficent is 0.30, and the sliding friction coefficient is .10. what force is need to get the sled moving? then, what force is needed to keep the sled moving at a constant

38. Physics

Two dogs are pulling on opposite ends of a bone. One dog pulls to the right with a force of 50 N while the other pulls to the left with a force of 40 N. Are the forces on the bone balanced or unbalanced? How do you know? What is the net force on the bone?

39. history

How did the Knights of Labor and the AFL differ from earlier unions?

40. chem

what is the gram formula mass of Li2SO4 ?

41. chem

the total pressure of n2o4 and no2 IS 1.38 atm. if kp is 6.75(25 C) calculate partial pressure of NO2 in the mixture. 2NO2 n2o4

42. physics help me please

A 1220 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1990 N crate hangs from the far end of the beamThe angle between the beam and the horizontal is 30 degrees upwards and the angle between the

43. Chemistry

How many grams of Ni(OH)2 are produced from the reaction of 45.0mL of 1.75 M NaOH solution?

44. chemistry help

this isnt exactly a chemistry question, but i am doing chemistry homework with my calculator. and i want to know if someone can tell me how can i cube something with this calculator? TI-30X IIS? i wanted to post a pic but i cant post sites. i have this

45. chemistry

Really need help on figuring out the formula for Iron Complex. The question was: 4.0 g of ferrous ammonium sulphate, FeS04(NH4)2*SO4*6H20, is used. The oxalate is in excess, calculate the theoretical yield of the iron complex. I got the moles of ferrous

46. physics

A centrifuge in a medical laboratory rotates at an angular speed of 3500 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge in rad/s^2.

47. Math

An object is dropped from a hot-air balloon 1296 feet above the ground. The height of the object is given by h=-16(t-9)(t+9) where the height h is measured in feet, and the time t is measured in seconds. After how many seconds will the object hit the

48. chemistry

a graph of melting point against relative atomic mass for the alkali metals on the same graph, a plot of the boiling points with a sentence to describe the information the graph gives

49. sociology

You are asked to come up with a plan to improve racial and ethnic relations in your community. What would your plan include? How would you address both individual and institutional discrimination in your plan? Explain.

50. chemistry

How much heat is gained (in Joules) by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 14 C?

51. geo

Describe the topography of the interior plains as you would see it if you were driving across the region from west to east to the Trans-Canada highway.

52. chemistry

A healthy adult exhales about 5.0*10 exponent 2 ml, of a gaseous mixture with each breath. calculate the number of molecules present in this volume at 37C and 1.1atm.

53. 12th Grade Calculus

1. a.) Find an equation for the line perpendicular to the tangent curve y=x^3 - 9x + 5 at the point (3,5) [* for a. the answer that I obtained was y-5 = -1/18 (x-3) ] b.) What is the smallest slope on the curve? At what point on the curve does the curve

54. Confidentiality in Allied Health Essay

Can anyone help me find other resources to the graded project for Penn Foster? I have the AMA, and the Peen foster books. Anything else would be great.

55. chemistry

What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.68?

56. phy 210

List advantages and disadvantages of various research methods

asked by terry johnson
57. Physics

Refrigerator Suppose that you want to freeze 1.2 kg of water for a party, and only have 10 minutes to do it. Relying on nothing but your keen physical abilities, a dixie cup, duct tape and a piece of string, you manage to build a refrigerator unit which

58. math

A battalion 20 miles long advances 20 miles. During this time, a messenger on a horse travels from the rear of the battalion to the front and immediately turns around, ending up precisely at the rear of the battalion upon the completion of the 20-mile

59. Trig

A plane flies 1.3 hr at 100mph on a bearing of N40degreesE. It then turns and flies 1.5hr at the same speed on a bearing of S50degreesE. How far is the plane from its starting point?

60. accounting

John's specialty store uses a perpetual inveentory system. the following are some inventory transaction for the month of may 2009. John's purchased merchandise on account for $5,000. FREIGHT CHARGE OF$300 WERE PAID IN CASH. JOHN'S RETURNED SOME OF THE

61. chemistry

If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity?

62. chemistry

For the weak acid HX, what is the pH of a 0.10 M solution if the acid is 4.0% ionized?

63. Math - derivative of sinusoidal (check + help)

h(t) 0.6cos(2t) + 08 sin(t) h'(t) = v(t) = -1.2sin(2t) + 0.8cos(t) find the vertical displacement when the velocity is 0.8m/s how do i solve v(t) = 0.8m/s I tried the normal way by equating and factoring, however two answers are obtained and the second

66. chemistry

3.49g of ammonia at STP weighs 4.48litre calculate molecular mass of it.

67. Chemistry

How many milliliters of 0.710 M HCl are required to react with 47.80 grams of CaCO3 ? Given the balanced reaction equation: 6 FeCl2(aq) + K2Cr2O7(aq) + 14 HCl(aq) 6 FeCl3(aq) + 2 CrCl3(aq) + 2 KCl(aq) + 7 H2O(l) How many moles of FeCl2(aq) are required to

68. Statistics

A Swedish study used 1360 patients who had suffered a stroke. The study randomly assigned 684 patients to receive a placebo treatment and the rest to receive an aspirin treatment. Out of those who received the placebo treatment, 28 died due to heart attack

69. Math

The path of a cliff diver as he dives into a lake is given by the equation y= -(x-10)^2+75, where y meters is the divers height above the water and x meters is the horizontal distance travelled by the diver. What is the maximum hight the diver is above

70. Math

A kickball is kicked upward with an initial vertical velocity of 3.2 meters per second. The height of the ball is given by h=-9.8t^2 + 3.2t where the height h is measured in feet, and the time t is measured in seconds. After how many seconds does the ball

71. 6th grade math

if Mary buys oranges at 5 for 2 cents and sell them at 4 for 3 cents how many must she buy and sell to make a profit of 420 cents?

72. Essay help :)

Here is my essay: All About The Greek Wars War is a devastating human activity, one that hurts populations, destroys property, and destroys political and social structures for places where humans live. The history of mankind has been a history of warfare

What is the role of the state governments under the articles of confederation?

74. physics

A projectile is launched straight upwards at 45 m/s. Three seconds later, its velocity is A. 75 m/s B. 30 m/s C. 15 m/s D. zero

75. math 12

From a deck of 52 cards, how many different four-card hands could be dealt which include one card from each suit?

76. chemistry

Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume 4.00L

77. chemistry

You have 100.7 g of saccharin, a sugar substitute, and you want to prepare a pH = 5.80 solution. What volume of solution can be prepared? For saccharin (HC7H4NSO3), pKa = 11.70 (pKa = −log Ka).

78. physics

A ball player wishes to determine her pitching speed by throwing a ball horizontally from an elevation of 3.0 m above the ground. She sees the ball land 15 m down the range. What is the speed of the ball as it leaves her hand?

79. Math

Im in advanced math and were doing Graphing Inequalities and im not sure how to do it.

80. physics help?

A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude

81. math 12

From 85 Records at D.S. Collegiate, the following data was collected: 12 studied Sociology, Economics and Accounting, 27 studied sociology and accounting, 20 studied economics and accounting, 21 studied economics and sociology, 36 studied sociology, 36

82. Finance

A company issues a 10,000 par value 10-year bond with 8% annual coupon payments. If the yield rate is 6%, calculate the price of this bond.

83. Physics

When empty, a particular helicopter of mass 3770 kg can accelerate straight upward at a maximum acceleration of 1.29 m/s2. A careless crewman overloads the helicopter so that it is just unable to lift off. What is the mass of the cargo?

84. Very Important Question!!!

Please can someone tell me of any websites that can help me with algebra graphing, plotting, inequalities, and x & y intercept equations?

85. chemistry

What is the pH of a solution of vinegar, which is 5.00% (w/v) acetic acid (CH3COOH, Ka = 1.8 e-5).what is the % dissociation?

86. physics

A ball player wishes to determine her pitching speed by throwing a ball horizontally from an elevation of 3.0 m above the ground. She sees the ball land 15 m down the range. What is the speed of the ball as it leaves her hand?

87. Math

The path of a cliff diver as he dives into a lake is given by the equation y= -(x-10)^2+75, where y meters is the divers height above the water and x meters is the horizontal distance travelled by the diver. What is the maximum hight the diver is above

88. Math

one way to resize a ring is to fill a bar into the ring.suppose a ring that is 20 mm in diameter has to be resized to fit a fingure 16 mm n diameter what is the length of the bar that should be inserted in order to make the ring fit the fingure? ( Hint:

89. chemistry

Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume To Drbobb222, after using the formular u gave. PV=nRT moles for NI(CO)4 is 171 and the volume is 4,

90. Statistics

A student studies for a statistics exam where all questions are true or false. A reputable source indicates that with studying the student has a 90% chance of answering each question correctly. There are only three questions on the test. What is the

91. Trigonometry

The Chrysler Building casts a shadow approximately 130 feet long on the street when the Sun's rays form an 82.9 angle with the Earth. Approximately how tall is the building? Round you answer to four decimal places.

92. Math

Solve for x : 16y^2=120x-225

93. physics

Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

94. Physics

Two masses are suspended from a pulley as shown in the figure . The pulley itself has a mass of 0.30 kg, a radius of 0.20 m, and a constant torque of 0.30 m \cdot N due to the friction between the rotating pulley and its axle. What is the magnitude of the

95. Physics

A rock weighs 140 N in air and has a volume of 0.00273 m3. What is its apparent weight when sub- merged in water? The acceleration of gravity is 9.8 m/s2 . Answer in units of N. If it is submerged in a liquid with a density exactly 1.9 times that of water,

96. physics

Suppose that you want to freeze 1.2 kg of water for a party, and only have 10 minutes to do it. Relying on nothing but your keen physical abilities, a dixie cup, duct tape and a piece of string, you manage to build a refrigerator unit which can do the job.

97. Nonfiction

What does Seattle say about integrating white and Native American cultures?

98. Teaching techniques

1. Which learning technique is frequently used in the expository model of teaching? A. Deductive thinking C. Discovery learning B. Inductive thinking D. Knowledge-based learning 2. Which technique is used after a student gives a wrong answer, and the

asked by I. Kan
99. 6th grade math

a man is now three times as old as his son and was 30 when his son was born. how old is his son now?

100. physics help please

The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 6.0 rev/s in 12.0 s. At this point the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub slows to rest in 11.0 s.

101. english

In a Word document, write a narrative paragraph that uses dialogue. The paragraph should demonstrate your ability to use sentence variety and proper punctuation. Your audience is your classmates. Begin with a 2-3 sentence description of the scene. Then add

102. chemistry

does NOCL follow the octet rule

103. physics

Two spheres A and B, where A has twice the mas of B, are projected at the same horizontal velocity off the edge of two different height shelves. Sphere A leaves from a height of 2.0 m. Sphere B leaves a shelf 1.0 m off the floor. If both spheres leave the

104. physics

Suppose you roll a bowling ball at 2.5 m/s across the roof of a flat building. It leaves the edge and strikes the ground 2.0 s later. How high is the roof? How far from the edge of the roof does the ball hit the ground?

18. Which of the following is not a ramification of too much or too little status in an organization? a. it inhibits communication b. solidarity is not developed c. it interferes with work d. it causes resentment and conflict e. it causes communication

106. Programming

Write a program that allows the user to display a budget as a pie chart. After the user enters numbers into the four text boxes a presses the button, the pie chart should be displayed. When I push the button for my code it does not display anything. Could

107. calculus

find the centroid of the region bounded by x^2-12x and the x-axis

108. trig

Find the values of the six trigonometric functions of the angle in standard position with the terminal side passing through the point P(-4, 3).

A petty cash fund of $100 is replenished when the fund contains$5 in cash and receipts for $92. The entry to replenish the fund would asked by Anonymous 110. bobpursley please help A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude asked by ruby 111. Algebra 1 What is the solution of this question. You are taking a science course in which there will be four tests, each worth 100 points. You have scores of 88, 88, and 98 on the first three tests. You must make a total of 360 in order to get an A. What scores on asked by Desperately seeking help!! 112. calculus find the area the region bounded by the graphs of the given equation y=81x,y=x^5,x=0,x=3 asked by Raven 113. physics a flight attendant pulls her 75 N flight bag a distance of 325 m along a level airport floor at a constant velocity. the force she exerts is 39 N at an angle of 57 degrees above the horizontal. calculate the coefficient of kinetic friction between the asked by Alex 114. Trigonometry Solve the equation on the interval 0 asked by Sarah 115. CHEMISTRY A 2.800-g mineral sample was analyzed for its calcium carbonate, CaCO3, content by titrating it with hydrochloric acid (the reaction products are calcium chloride, carbon dioxide, and water). The sample required 28.48 mL of a 0.1505 M HCl solution to react asked by Anonymous 116. Physics A 7200 lb airplane lands on an aircraft carrier with a speed of 72 ft/s. The plane is caught by an elastic band (k=998 lb/ft) that has an initial stretch of 5.6 feet. What is the maximum distance the band is stretched? asked by sandhu 117. Physics When a 55 N stone is attached to a spring scale and is submerged in water, the spring scale reads 30 N. What is the density of the stone? Answer in units of kg/m3. asked by Nicole 118. chemistry Which of the following is a conjugate acid-base pair? A. H2SO4, H2SO3 B. NH3, NO2 C. CH3OH, CH3COOH D. HF, H2F E. NH3, NH4+ asked by cs 119. Economics The productivity of a single resource in producing wheat and microchips in both Canada and Japan: One unit of resource produces: Canada 50 tons wheat, 20 micrchips and Japan 2 tons wheat, 12 microchips. (b) Suppose Canada is endowed with 2 units of this asked by lucky 120. physics A 1240 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1970 N crate hangs from the far end of the beamThe angle between the beam and the horizontal is 30 degrees upwards and the angle between the asked by student 121. Physics If the create has a mass of 90 kg and is 1.6 {\rm m} tall and 0.80 {\rm m} in depth and width, what is the minimum force needed to make the crate start tipping? (Assume the center of mass of the crate is at its center and static friction great enough to asked by Danny 122. chemistry Calculate the H+ concentration (M) of a 0.010 M solution of NH4Cl. Note that the Kb for NH3 is 1.8 e-5. asked by cs 123. literature What is the plot summary of Edgar Allan Poe's "Cask of Amontillado"? With the introduction, rising action, climax,falling action and denouement. Thanks... asked by klarmaesen 124. algebra cube has avolume of 729 cubic centimeters what is its side length asked by james 125. 8th Grade Math Can you please check my answer? An American football field is a rectangle 120 yards long (including both end zones) and 53 1/3 yards wide. What is the area of an American football field? my answer: 6360 square yards asked by Elizabeth 126. Chemistry write the formula for the following chemical compounds 1.Sodium sulfide 2.sulfur hexaflouride 3.Ammonium sulfate asked by lisa 127. Pen Foster Child Care Can you look over these to see if they are right? 1. The first step to planning a child care center is to A. develop your program philosophy. B. determine the nature of the need for child care facilities in your community. C. establish goals for the asked by Doris 128. physics help Two thin rectangular sheets (0.15 m 0.50 m) are identical. In the first sheet the axis of rotation lies along the 0.15 m side, and in the second it lies along the 0.50 m side. The same torque is applied to each sheet. The first sheet, starting from rest, asked by student 129. Chemistry in an endothermic reaction 1.energy is a product and the temperature of the surrounding environment increases 2.energy is a product and the temperature of the surrounding environment decreases 3.energy is a rectant and the temperature of the surrounding asked by Anonymous 130. Trigonometry college Use a calculator to solve csc (theta) = -3. I know the answer is 3.48 and 5.94 but I need the steps to take on the calculator to arrive at the answer. I have a ti-84 calculator. thanks! asked by Sarah 131. college Consider a gold sphere of mass 49 kg. Find its radius. asked by ciara 132. Math Let AB and CD be two lines intersecting at point O. Let OP be the bisector of angle AOC, OT the bisector of angle POB, and OR the bisector of angle TOD. If angle POR = 25 degrees, find angle AOC and angle AOD. asked by Freaky 133. pre algebra THe second of three numbers is 5 less than 4 times the first. The third is 9 less than twice the first. If 4 times the third os decreased by the first, the result is 6. find the three numbers. asked by lexy1727 134. Calculus 6x-3y=4 find dy/dx using differentiating implicity asked by Ivan 135. chemistry what is the percent composition by mass of water in a compound with a gram formula mass of 4905 g/mol asked by mike 136. chemistry Ni+4CO=NI(CO)4 this reaction separates nickel from other solid impurities.Starting with 86.4g NI,calculte the pressure of NI(CO)4 in a container of volume 4.00L asked by silly 137. chemistry A 75.0-\rm mL volume of 0.200 M \rm NH_3 (K_{\rm b}=1.8\times 10^{-5}) is titrated with 0.500 M \rm HNO_3. Calculate the \rm pH after the addition of 13.0 mL of \rm HNO_3. asked by sam 138. Chem The ka expression for HTe- is? asked by IH 139. Chem What is the pH of the solution formed when 0.040mol NaOH(s) is added to 2.00L of 0.020M HCl? asked by IH 140. Math Let AB and CD be two lines intersecting at point O. Let OP be the bisector of angle AOC, OT the bisector of angle POB, and OR the bisector of angle TOD. If angle POR = 25 degrees, find angle AOC and angle AOD. asked by Suzy 141. math Which equation should be used to solve this problem? There is a number that is 8 less than the sum of 20 + 12. Find the number. Let n = the number. asked by Anonymous 142. history what is the purpose of the three-fifths compromise asked by daniel 143. chemistry How many liters of 0.250 M HCl would be required to react completely with 7.50 grams of magnesium hydroxide? asked by Justin 144. physics what is optical excitation asked by pradee 145. English 1) The wind is personified as a tired man, who like a guest, knocks at Emily Dickinson's door and asks her to enter. 2) Being invisible, there is no point in giving him a chair (it is no use giving him a chair) 3) Through his poem Davies wants to stress asked by Franco 146. chemistry divide eq 2 by 2: 2H(g)........> H2(g) delta H= -104.2Kcal H(g) ........> 1/2 H2(g) delta H= -72.1Kcal Now reverse the reaction: 1/2H2(g).......>H(g) delta H=+72.1Kcal subtract this eq from eq 1 1/2H(g)+1/2I2(g).....>HI(g) delta H=-1.1kcal asked by Anonymous 147. math there are 24 hours in a day and scientists tell us that we should sleep for 3/8 of the day.How much time should we spend sleeping? asked by jessie 148. Finance A company issues a 6-year bond with a face value of 5,000 and semi-annual coupons payments of$275. If the yield rate is 7%, find the price of the bond.

A woman who weighs 4.33 X10^2 N is leaning against a smooth vertical wall, as the drawing shows. The height of the wall from her shoulder to her hand is .400m the angle at which she is laying on the wall is 50 degrees and the rest of the height at which

150. geometry

a man builds a teepee in his back yard. the width of the teepee is 12ft. The height of the teepee is 8 feet. How long is the length of the pipes?

asked by Joann Paynter
151. Stastics

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has recently been marketed. The FDA tests on this cigarette yielded

152. Trig

Find the value of tangent of angle A, given cos2A = 4/5, and A terminates in quadrant 2

How do I calculate the monthly payment...... Loan is $26,000.00 Down payment is 5,000.00 11% for 36 months asked by Mare 154. Chemistry which is an example of physical change 1.water decomposing into hydrogen and oxygen 2.potassium and bromine combining to form potassium bromide 3.solid ice melting into liquid water 4.none of the above i think its 3. asked by jessica 155. french, english this is a french fable that I translated but I don't really undersand it. It is called the lion and the hunter... A braggart, lover of hunting, Just lost a dog of good breed, He suspected the body of a lion, Saw a shepherd: "Teach me, please, My thief, he asked by mark 156. English I still don't know how to rephrase dabbling correctly. Can you check if everything is OK? Thank you for helping 1)He thought there should be sea-police upon the Haerwich-Holland ranges since that sea stretch was constantly overrun by pirates. 2) He was asked by Franco 157. business math two partners in a business. one partner mortgaged business property to his co-partner for$15,000.00 at 12% a year interest. no payments were ever made for 17 years. how much is owed?

asked by martin sostre
158. Chemistry

write the formula for iron(II)bromide iron(III) sulfate

The majority of the world’s diamonds comes from Country A and Country B. Suppose that the marginal cost of mining a diamond is $1,000 per diamond and that the demand schedule for diamonds is as follows: price quantity 6,000 5,500 5,000 6,500 4,000 7,000 asked by mary 160. statistics Four jelly beans are selected, one at a time from a bowl containing 6 black, 6 red and 6 green jelly beans. Let x represent the number of black jelly beans selected in 4 draws from the bowl. (A) If this experiment is completed without replacing the jelly asked by kelly 161. business A colleague, an amateur pilot, shows up at a critical meeting with some Japanese executives wearing a tie adorned with pictures of a P51D Mustang escorting a B-29 Superfortress (the Mustang is a World War II fighter and the Superfortress is the type of asked by maggie 162. Chemistry if metal A is placed in an ionic solution containing metal B ions and no reaction occurs, then metal B is most likely: A.) a halogen B.) higher on the activity series C.) not on the activity series D.) a catalyst asked by Lauren 163. business You know that you have only$110 left before you hit the limit on your credit card, and you have $8 in your wallet. You are the host to three clients. One has just announced that he is considering the lobster dinner for$40. The other two clients nod their

While waiting outside a meeting room, you notice that the next middle manager making a presentation is rehearsing what he will say. The pants zipper of his blue suit is open and part of his white shirt is protruding

165. college

If I combined 25.0 grams of aluminum hydroxide with 75.0 mL of 0.500 M HNO3 how many grams of aluminum hydroxide would be formed?

166. Economics

The productivity of a single resource in producing wheat and microchips in both Canada and Japan: One unit of resouce produces: Canada 50 tons wheat, 20 microchips and Japan 2 tons wheat, 12 microchips. (a) What is the opportunity cost of producing a ton

167. physics

A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (muk = 0.43). What is its final speed? (m/s) Thanks for suggeting the following solution. The block starts with an initial speed of 18.0 m/s.Does it have any

168. Literature

What are some similarities between the Wife of Bath's Tale and The Merchant's tale (by chaucer)?

169. Math

Explain how you can tell (without graphing it) that the rational function r(x)= x^6 +10 / x^4+8x^2+15 has no x intercept and no horizontal, vertical, or slant asymptote. What is its end behaviour? Please help? thankq

170. physics

a.)if a person is trying to throw and object with a mass of 2000kg, how much force must they use to lift it? b.) in throwing it, the person accelerates the object from rest to 25m/s in 1.5 meters. How much force is used to do this?

171. chemistry

Write balanced equations for the following: K3P + Ge = Al2(CO3)3 + AgBr Cr(ClO3)3 =

172. ELA

Does this introduction have a connection to the main idea "Vampire Survival" Vampires have become the most interesting and popular immoral creature during the years. Characters as a vampire in a movie or even in book! Now… If you believe that vampires

182. science

Hi. I am conducting a science experiment to present to a class. Details of experiment below. Materials: 1 can of non-diet soda 1 can of diet soda 2 buckets of water 1. Fill bucket 2. Put can of non-diet soda into a bucket of water. 3. Wait for the can to

183. Statistics

A community of 100 homes constructed in 2009 contains 47 that used conventional construction. The reminder used Energy Star building standards. A real estate agent is going to show a client 5 homes. What is the probability that 3 were built using

184. algebra

what are 3 consecutive positive even integers that the product of the second and third integers is twebnty more than ten times the first integer?

185. chemistry

The electrochemical cell described by the cell notation has an Eo of -0.37 V. Calculate the maximum electrical work (kJ) the cell has done if 331.73 g of Cu(s) (Molar Mass - 63.55 g/mol) reacts. Round your answer to 3 significant figures. Cu(s) l Cu+(aq)

186. English

Thank you for your corrections. I still need your help with a few sentences. I apologise for not writing an introduction to my previous post. 1) Pay careful attention to the plural of words and to the spelling of the verb “say”. 2)As you started

187. Chemistry

So I mixed 25 mL of 0.002 M KSCN and 25 mL of water in a beaker. The solution was clear with no precipitants. But then it says the ions present in KSCN are: so i put K+,S2- , CN- is that right?

188. Physics

A train has a mass of 5.22 multiplied by 106 kg and is moving at 82.0 km/h. The engineer applies the brakes, resulting in a net backward force of 1.87 multiplied by 106 N on the train. The brakes are held on for 21.0 s.

189. physics

An aluminum wire of radius 3.10 10-4 m is stretched between the ends of 2 concrete blocks. When the system (wire and concrete) is at 35°C, the tension in the wire is 57.0 N. What is the tension in the wire when the system is heated to 185°C?

190. algebra

Functions of the same famil have the same... (?) Can someone help with the answer??

191. Chemistry

12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.

192. calculus1

x^5-5y=6-x find dy/dx using differentiating implicity

193. calculus2

x^2+2y^2-11=0 find dy/dx using differentiating implicity

194. physics

a.)if a person is trying to throw and object with a mass of 2000kg, how much force must they use to lift it? b.) in throwing it, the person accelerates the object from rest to 25m/s in 1.5 meters. How much force is used to do this?

195. ELA

Is the Introduction below connection to the main Idea Vampire Survival: Vampires have become the most interesting and popular immoral creature during the years. Characters as a vampire in a movie or even in book! Now… People might wonder that are

196. Chemistry

4.745 eq. of magnesium will displace how many grams of silver from a silver nitrate solution? I have written the equation as follows: Mg + 2AgNO3 = Mg(NO3)2 + 2Ag I'm not sure how to proceed with converting the 4.745 eq. Any help would be appreciated.

197. geometry

if the diagonals of a rhombus is 12 and 16 what is the measure of a side of the rhombus 5,,20,10 square root 3

198. History

What features of the constitution make it flexible enough to apply to the nations today?

199. Chemistry

if it takes 20 h to convert 100g of reactant A to roduct C at 20 degrees celcius, approximately how many minutes would it take at 110 degrees celcius? I know the answer, I just don't know how to get the answer

200. Chem

What is the pH of the solution formed when 0.040mol NaOH(s) is added to 2.00L of 0.020M HCl?

201. math

a room at the hamilton inn costs 104 dollars per night for two people there is a 19 dollar charge for an extra person write an algebric expression thaat shows the cost oper night for a family of four staying at the inn

202. OMG

I have been trying to get my question answered and it still haven't more then 1 hr you know when are you going to answer my and every one else's question

203. math

sara wants to buy a jacket on sale. its original price is $15.00.The sale is 25% off.How much will sara save by buying the jacket on sale ? my answer is$3.75 is it correct?

204. chemistry

Calculate the pH of a 5.20 10-3 M solution of H2SO4.

205. chemistry

Calculate the pH of 3.9 10-8 M HNO3.

206. math

6 feet in 2 yards; how many yards in 10feet? i think the answer is 3

207. College Algebra

perform the indicated operations 9-3[4-3(2)

208. College Algebra

can someone tell me how to get a division symbol when posting problems in Algebra

209. College Algebra

Perform the indicated operations 10 − 5[24 ÷ 6 ⋅ 2] 1

210. History

What are some specific achievements of the people that Romans called "Barbarians"

asked by Mystery chicken

A quadrilateral has angle measures of 71 degrees, 28 degrees, and 115 degrees. Which is the measure of the last angle?

212. Math - Rates of change and the number e (check + h

Let f(x)= (1/b)^x for b>1, and left g(x) = (f'(x))/(f(x)) a) Predict the shape of the graph of g(x). it will be a straight line, since ln(1/b) will be a constant b) Test your prediction by exploring two specific cases. Values of (1/2) and (1/10) c)

213. college

what is the concentration of the chloride ion when enough water is added to 12 grams of sodium chloride to make 4.0 Liters if solution? (a) 0.025 M (b)0.05 M (c) 0.1 M (d)0.2

214. physics

a 50kg object is suspended by a rope over a pulley which is connected to a large mass of 61.3kg. The mass rests on a 30 degree inclined ramp. The coefficient of kinetic friction between the block and the ramp is .15. What is the 50kg object's acceleration?

215. math

For 0 < x < 1, let f(x) = (1 + x)(1 + x4)(1 + x16)(1 + x64)(1 + x256) · · · Compute f−1 8 5f(3/8) 

216. science

what happens to a soccer ball underwater at a depth of 50 feet?

217. english

i have to write a research paper on SAP Applications and i need some authentic websites ?

218. calculus3

x^2/3+y^2/3=5 find dy/dx using differentiating implicity

219. calculus4

2y^3-y=7-x^4 find dy/dx using differentiating implicity

220. calculus5

(y^2+2)^3=x^4y+e^2 find dy/dx using differentiating implicity

286. Math

a man plans to build a teepee in the back yard for his children. The distance between the stays is 12 ft. the height to the top of the teepee is 8 ft. what is the length of pipes required for the teepee?

asked by Joann Paynter
287. Family day care regualtions educational levels

Put this in order from begining to last associates degree 40 hour training bachelors degree cda degree or FCCPC associates thanks

288. English

Does this sentence need a comma? On this web site one can choose from eleven central science areas.

289. physics

An object has 90.38 Joules of energy and it is traveling at 11.26 m/s. What is the objects mass?

290. 7th grade math

a moving van's load changes from 1000 pounds to 800 pounds after delivering an appliance. What is the percent of decrease

291. math

For 0 < x < 1, let f(x) = (1 + x)(1 + x4)(1 + x16)(1 + x64)(1 + x256) · · · Compute f−1  8 5f(3/8) 

292. math

Let AB and CD be two lines intersecting at point O. Let OP be the bisector of ]AOC, OT the bisector of ]POB, and OR the bisector of ]TOD. If ]POR = 25, find ]AOC and ]AOD.

293. english

what does the mentioning of heavenly bodies, i.e. the sky, the air, etc., reflect in the "The Shawl" by Cynthia Ozick?

whats the gcf of 16 and 42 why

295. Math

How much foil is required to cover a rectangular box that is 4 in by 8 in by 5 in?

296. Algebra ?

When dN= 3 ; H = 4.6 ; Do = 70 ; Dn=38 ; L=77,8 Solve this : R= d + H Dn-Do -------------- 2L

297. cosmetics science

Could you tell me,what is the specific mobile phase of lycopene when stationary phase is silica? Thank you.

298. US History

Who did Truman promise to help? a)subjugated minorities b)armed resistance movemnts c)majorities whose freedom was threatened d)all of the above I think D

299. math

f(x) = -x squared + 1 for x= -3

300. Math

What is 4/6XDivided by 19xy ?

asked by Sammi Danielle
301. psy 240

mary is a single mother of one child. She has had difficult sleeping for the last month.Define her disorder

asked by Lisa Smith

which ons is stronger 1)A solid cylinder of 2)A hollow cylinser of iron 3) A cylinder made up of slits of iron

303. CAL 1

DERIVATIVE f(x)=4t+1 (x,x+2)

304. math

Two cards are drawn without replacement from a deck of 52 cards. What is the probability that both are tens, if the first card was a ten?

305. Algebra II

What does it mean when the domain of a function is (-‡,‡)? What about a range of,say, (2,‡)? (In case it doesn't come out right, that symbol is the infinity symbol).

306. math

find unit rate 40 textbooks weigh 120 pounds

307. math

Today a new Ford costs $24,000 in 1970 it cost$6,000 what is the price relative?

308. math

10 servimgs per quart, how many serving per gallon? i think 40

309. medical billing and coding

you work in a physcians office performing billing. You notice that guidelines haven't been followed accurately in completing the claim form. what will happen if you don't correct the claim form?

310. EDU310

please help me with this two questions I am in the hospital because i have a car accident please help 1- There are many groups that influence education in schools today. Who are these stakeholders and how do they impact the way children are educated in

311. need physics help

d=2.1 a=? vi=0 and t=.60 and i have to use the formula d=vit+1/2at^2, how do i do this? can you please show work so i can understand.

312. Health

what is the drug classification of inhalants?

313. English

Thank you very much. I still have a few questions. 1) Your sentences are confused and sometimes disconnected. Check the spelling in the dictionary before writing a word and make sure you are using tenses correctly. 2) White people failed (their mission)

314. math

For 0 < x < 1, let f(x) = (1 + x)(1 + x4)(1 + x16)(1 + x64)(1 + x256) · · · Compute f−1(8/5f(3/8) 

315. US History

Do you think the Truman Doctrine would be a good model for conducting American foreign policy today? Why or why not ?

316. general psychology

What possible factors could be causing workplace stress for Felicia? Identify and explain methods she could use to cope with these sources of stress. Write your observations in a report.