# Donna

Newest questions and responses by Donna
1. ## math

Solve belove question base on Pigeonhole Principle. A set M=(1,2,......100) is divided into seven subsets with no number in 2 or more subsets. Show that at least one subset either contains four numbers a,b,c, and d such that a+b = c+d or three number p,q

2. ## Chemistry

What is the percentage yield of N2O5 when 68.0g of O2 reacts With N2 according to the reaction equation, with 72.6g of N2O5 being obtained? 2N2 + 5O2 -> 2N2O5

3. ## math

Searches related to what is the answer to Triangle ABC has two sides that measure 12 inches and 16 inches. Which could be the measures of the corresponding sides of a triangle that is similar to triangle ABC? 1. 10 in and 14 in 2. 9 in and 12 in 3. 6 in

4. ## algebra 1

suppose you deliver mail in an office building. You leave the mailroom and enter the elevator next door. you go up 4 floors, down 7, and up nine to the top floor. Then,you go down 6, up 2 and down 8 to the lobby on the first floor. What floor is the

5. ## math

10-2+3x5 no parethesis

6. ## Physics

Hi, do you know how angular velocity relates to a "tight spiral" in football?

7. ## Government

How did those associated with WikiLeaks view Snowden's actions? h t t p : // w w w . business insider . co m / edward- snowden-and -wikileaks - 2014 -1 I was confused after reading this article. Could someone help me briefly summarize ***HOW DID THOSE

8. ## Government

1.) How do US government officials, and then individuals like Edward Snowden and those associated with WikiLeaks view Snowden’s actions differently? Why 2.) How has the U.S relationship with Russia been affected by their decision to grant Snowden asylum,

9. ## Geometry

Using the notation Ta,b(x,y)=(x+a, y+b) write a translation function

10. ## math

John was jogging at a rate of 5mph and he has a one half mile start on Sue who jogs at 7 mph. In how many minutes will it take before they meet?

11. ## Physics

Please help me with this its very hard to visualize the problem. The analytical method of adding vectors expressed in terms of their components may be applied to vectors in three dimensions, for which graphical work is inconvenient. Find the magnitude of

12. ## Physics

I am given the x and y components of a force and it is asking me to calculate the direction of this force or find the angle in degrees with respect to the y-axis. How do I go about doing this? Thank you in advance.

13. ## math

Juan sells suits in a major department store on weekends.He earns a commission of 5% on the first 10 suits, and if he sells more than 10 He earns an additional 3% on the additional suits. Last weekend Juan sold 13 suits at a price of \$250 each. What was

14. ## Jewelry

I have an antique Neclace with the marking SC on it. Just wondered if it was worth anything?

15. ## algebra

Substitute 6x² from 3y-2x+5x²

16. ## chemistry

How would you prepare 3.5 L of a 0.9M solution of KCl? A. Add 23 g of KCl to a 3.5 L container; then add enough water to dissolve the KCl and fill the container to the 3.5 L mark. B. Add 233 g of KCl to a 3.5 L container; then add enough water to dissolve

17. ## chemistry

. Which of the following is not a way an atom can achieve stability?

18. ## Math

Please this problem to me There is a stack of 8 cards from 1-8 suppose we select a card randomly from the stack, replace it, then randomly select another card What is the probability the first card is a even number and the second card is greater than 6

19. ## physics

A 5 kg block is being pulled on a frictionless surface by a string at an angle of 30o to the horizontal. The tension in the string is 30 N. What is the total work done on the block as it moves a distance of 10 m? Thank you!

20. ## Physics

A 5kg block is being pulled on a horizontal frictionless surface. The tension in the string is 30N. If the block has an initial speed of 2m/s, what is the speed after moving 10 meters? Please help!Thanks

21. ## Physics

A 5kg block is being pulled on a horizontal frictionless surface. The tension in the string is 30N. If the block has an initial speed of 2m/s, what is the speed after moving 10 meters? Please help!Thanks

22. ## science

If I mix 300g of reactant A with 100g of reactant B in a close system how much will it weigh

23. ## math...finding cubic feet

What is the cubic feet of a cylinder that's 12 3/4 inches wide and 16 inches tall?

24. ## Math

Sarah and Noah work at Read On Bookstore and get paid the same hourly wage

25. ## statistics

The pie chart below shows how the total annual income for a certain family is spent. If the total annual income is , what amount is budgeted for Savings and Insurance combined?

26. ## Algebra

3 girls whose ages total 36. Sue is 1/3 Jill's age. Sue is 4 times as old as Jane. What are their individual ages?

27. ## DMMS

Chemistry What characteristics are shared by all alkali metals and alkaline earth metals? A They conduct electricity very well B They are strong and shiny C They form alkaline solutions when mixed with water D They do not react with water at all

28. ## MATH

pAYTON'S WEIGHT IS 60 LBS. sHE IS 5 TIMES AS HEAVY AS HER YOUNGEST BROTHER SETH. wHAT IS SETH'S WEIGHT?

29. ## history

the Continental Army and blank were no match against the large number of British soldiers who landed on blank

30. ## statistics

A student takes an exam containing 14 multiple choice questions. The probability of choosing a correct answer by knowledgeable guessing is 0.5. At least 9 correct answers are required to pass. If the student makes knowledgeable guesses, what is the

31. ## hydraulics

The surface of the large piston is 4m2. What will the force (F2) be that is exerted by the large piston?

What does 5*6 mean?

33. ## Algebra

Maria needs \$2.45 to buy a magazine. The only money she has is a jar of nickels and dimes. Write an equation in standard form for the different amounts of nickels x and dimes y she could use. I tried .05x +.2y+2.35 but could not figure it out

34. ## Algebra

write an equation for a rational function that has a vertical asymptote of -4, a horizontal asymptote of 3, and vertically shrinks the graph by a factor of 5 (compared to the graph of y=1/x). So far I have Y=3x/x+4 but I can't figure out how to shrink the

35. ## Maths I NEED AN ANSWER ! THE 6 IS ALL I KNOW!!!

Angel is thinking of a number. All its digit are even numbers. The sum of its digit is 18. The digit 6 stands for sixty. The smallest of the three digits is in the tenths place. The greatest of the three digit is in the ones place. What number is Angel

36. ## Managerial Finance II

Ten rights are necessary to purchase one share of Fogel stock at \$54. A right sells for a \$6. The ex-rights value of Fogel stock is...?

37. ## Geometry-Reiny

Thank you! A, B, C and D are all on the circle. If the circle was a clock, point A would be around 11:00, B is around 9, C is around 6 and D is around 4 ... P is in the middle. A straight line runs vertical to the circle touching the circle at point B. E

38. ## Geometry

Max is building a spherical model of earth. He is building his model using 2-inch long pieces of wood to construct the radius. The first time he tries to build the model, he uses 3 of the 2-inch pieces of wood end-to-end to make the radius of the model.

39. ## Geometry

A scientist is plotting the circular path of a particle on a coordinate plane for a lab experiment. The scientist knows the path is a perfect circle and that the particle starts at ordered pair (-5, -11). When the particle is halfway around the circle, the

40. ## Geometry

Trying to help my Autistic child with geometry. Need a simple step by step explanation and answer please. In this open ended question, find each item and include an explanation of how you found each one. Find arc AD. Find angle APD. If arc BC=100 degrees,

41. ## statistics

A daily lottery is conducted in which two winning numbers are selected out of 100 numbers. How many different combinations of winning numbers are possible?

42. ## Chemistry

Calculate the volume of solution of 3.6 M NH4CI needed to prepare 350.0ml of 1.24 M NH4CI. How many grams of ammonium chloride are in the solution you created in the above problem.

43. ## Chemistry

How many moles of potassium sulfate would you need to prepare 1200 grams of 5.0% sulfate (m/m) solution? Calculate the volume of solution of 3.6 NH4CI needed to prepare 350.0ml of 1.24 M NH4CI. How many grams of ammonium chloride are in the solution you

44. ## Great Valley

How many moles of potassium sulfate would you need to prepare 1200 grams of 5.0% sulfate (m/m) solution? Calculate the volume of solution of 3.6 NH4CI needed to prepare 350.0ml of 1.24 M NH4CI. How many grams of ammonium chloride are in the solution you

45. ## child care development

I have two questions that I need checked. Toddlers are incapable of sharing, even for short periods of time. (true or false) I chose false Secondly,tummy time is a supervised timewhile the infant is awake, during which the infant is ladi on his or her

46. ## finance

You buy one share of stock at \$30.00, hold it for one year and sell it for \$40. IF you receive \$2.50 in dividends, what is your return on investment?

47. ## chemistry

Suppose 50mL of 8.4 x 10^-7 M Pb(NO3)2 (aq) is mixed with 200 mL of 9.7 x 10 ^-4 M Na2CO3 (aq). Calculate Q and determine whether a ppt of PbCO3(s) will form.

48. ## Geometry

Al's garden is 18 feet long and 30 feet wide he wants to put a fence post that same distance apart along both the length and the width of the fence what is the greatest distance he can put apart the fence post

49. ## Math

Draw a velocity vector to represent the following (1cm represents 10km/h): a) a girl running around a circular track travelling at 15km/h heading due east. In the solutions, it shows it heading south, why is that?

50. ## Chemistry

Calculate the mass of Al2(SO4)3 produced when 4.26kg of Al(NO3)3 is added to an excess of K2SO4.

51. ## algebra

A field goal is 3 points and the extra point after a touchdown is 1 point. a player made 21 field goals and extra point kicks for 49 points. Find the number of field goals and extra points that he made. FG= x extra point =y =49 x+y=49 did i set up the

52. ## finance math

Meg's pension plan is an annuity with a guaranteed return of 7% interest per year (compounded annually). She would like to retire with a pension of \$30000 per annum for 15 years. If she works 31 years before retiring, how much money must she and her

53. ## Statistics

Where can I find the ti83 plus input functions for beginning statistics course

54. ## math

If I borrowed \$15000 in April 2008 at 6% interest and have paid \$150 per month since then, how much have I paid and how much do I owe?

55. ## marketing and research.

I am interested in assessing the influence of children on a family's purchasing decision at a grocery store. How would you investigate this problem by communication and observation?

56. ## physocology

Race usually refers to the biological characteristics that distinguish one group from another is this true or false

57. ## ctc

The unconscious memories that can surface to reveal hidden meaning or intentions describes which is the correct answer the psychodynamic perspective the psychosocial model cognitive development ecological systems theory evolutionary approaches

58. ## Math

write an algebraic expression for 43 more than t 43 + t

59. ## statistics

A company director took a sample of salaries of 13 employees in a big school during a certain time. she divided the wages into three groups according to the different jobs: teachers, assistants and coordinators as displayed in the table below. She wanted

60. ## tax

I too am having a hard time with the Marion drives 20 miles a day to 2 jobs for 125 days of the year. What is his deductible using the standard mileage rate assuming he incurred ratably throughout the year. I take 125 x 20 x 0.51 and come up with 1275.

61. ## physics

Two charged bodies exert a force of 0.225 N on each other. If they are moved so that they are one-third as far apart, what force is exerted?

Please can anyone answer this which I have posted previously? Anyone with knowledge of this area of maths? Thanks in anticipation. :) Formula given: The decibel (dB) scale for measuring loudness, d, is given by the formula d = 10 log base ten(I X 12 to the

63. ## Math

Formula given: The decibel (dB) scale for measuring loudness, d, is given by the formula d = 10 log base ten(I X 12 to the power of 12) where I is the intensity of sound in watts per square metre. a) Find the number of decibels of sound produced by a jet

64. ## Maths

Find the number of decibels of sound produced by a jet engine at a distance of 50 metres if the intensity is 10 watts per square metre. This time I'll post the given formula too. Sorry to leave it out before! The dB scale for measuring loudness, d, is

65. ## Maths

Find the number of decibels of sound produced by a jet engine at a distance of 50 metres if the intensity is 10 watts per square metre.

66. ## special ed.

Some years back i made each letter in the alphabet on index.....i folded the cards and then did cutting......I forget how to do it .....can you help ?

67. ## Engl

Simple subject and predicate? Officals hope the new shopping mall will increase pedestrian traffic and lure shoppers to the downtown area. ss...officals sp...hope

68. ## Engl.

Simple subject and predicate? The customs officals planned to seize a huge shipment of heroin when it arrived. SS...officals sp...planned

69. ## Engl.

Simple subject and predicate? The villagers were afraid the volcano would erupt. simple subject....villagers simple predicate...were

70. ## English

Simple predicate? We had to banish Mel from the game because he was cheating.

71. ## physics

A metal sphere hangs from a string and has 2 kg of mass. The sphere has a charge of +7.1 µC. A uniform electric field is turned on and directed to the right.

72. ## physics

A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The

73. ## physics

A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The

74. ## physics

A tray is moved horizontally back and forth in simple harmonic motion at a frequency of f = 1.86 Hz. On this tray is an empty cup. Obtain the coefficient of static friction between the tray and the cup, given that the cup begins slipping when the amplitude

75. ## physics

A spring stretches by 0.018 m when a 3.6-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 2.9 Hz?

76. ## physics

The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 303 kg. A person pushes down on the

77. ## physics

A 30.0-kg block is resting on a flat horizontal table. On top of this block is resting a 15.0-kg block, to which a horizontal spring is attached, as the drawing illustrates. The spring constant of the spring is 340 N/m. The coefficient of kinetic friction

78. ## physics

To measure the static friction coefficient between a 1.6-kg block and a vertical wall, the setup shown in the drawing is used. A spring (spring constant = 400 N/m) is attached to the block. Someone pushes on the end of the spring in a direction

79. ## Liquid capacity of pitcher

If a ceramic pitcher is 9.5 inches tall and has a diameter that is 3 3/4 at top and 4 inches at the bottom how many ounces will it hold. There use to be a gallon ratio to inches and you could deduct 30 percent for variating diameters. Do you know the

80. ## Loans

A borrower received a 30-year ARM mortgage loan for \$120,000. Rate caps are 3/2/6 (first adjustment/subsequent adjustments/total over the life of the loan). The start rate was 3.50% and the loan adjusts every 12 months for the life of the mortgage. The

81. ## physics

A girl is skipping stones across a lake. One of the stones accidentally ricochets off a toy boat that is initially at rest in the water (see the drawing below). The 0.058-kg stone strikes the boat at a velocity of 15 m/s, 15° below due east, and ricochets

82. ## Math

Is it sometimes, always or never true that a number is a factor and a multiple of itself?

83. ## Physics

A block is released from the top of a frictionless incline plane as pictured above. If the total distance travelled by the block is 1.2 m to get to the bottom, calculate how fast it is moving at the bottom using Conservation of Energy.(incline 20 degrees

84. ## physics

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 20.0 m. She pushes in a direction 28.0° below the horizontal. A 54.0-N frictional force opposes the motion of the cart.

85. ## physics

In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.36 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an

86. ## physics

Pilots of high-performance fighter planes can be subjected to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an

87. ## Physics

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 22.0 m, how fast

88. ## Physics

The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing indicate. If the coefficient of static friction between a crutch and the ground

89. ## physics

The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces vector T and vector T ' on this tooth in order to bring it back into alignment. If the forces have the same

90. ## Physics

The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 59000 N. The lift force vector L generated by the rotating blade makes an angle of 21.0° with respect to the vertical.

91. ## physics

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 42 m/s (around 90 mi/h) in a time of 7.3 s. The mass of the car and riders is 5700 kg. Find the average net force exerted on the car

92. ## Physics

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 20.0 m. She pushes in a direction 28.0° below the horizontal. A 54.0-N frictional force opposes the motion of the cart.

93. ## Physics

A truck is traveling at a speed of 23.0 m/s along a level road. A crate is resting on the bed of the truck, and the coefficient of static friction between the crate and the truck bed is 0.610. Determine the shortest distance in which the truck can come to

94. ## science

A man seeking to set a world record wants to tow a 106,000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 77 kg, and the coefficient of static friction between his shoes and the runway is

95. ## chemistry

A student took 100 mL of a solution of Mg(OH)2 and reacted it with HCl (aq) to calculate the concentration of hydroxide ions in the solution. If 13.75 mL of 0.010M HCl was used to react with all of the OH- (aq) in the 100-mL solution, what was the

96. ## ecology

how do you construct a age pyramid. i have the age class and observed individuals how do i get the present in each age class

97. ## Physics

A 24.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 77.0 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction.

98. ## physics

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 284 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' force. If

99. ## Math

How do you write 22 6/9 into an equivalant fraction?