# sylvia

Newest questions and responses by sylvia
1. ## Math calculus by rotation

Calculate the volume obtained by rotating around y= -3 the area between the curves x= y^2 -4 x+y+2=0 I did the Volume as an integral between (-4, 0) of (x^2 +x - 12 - 6(x+4) ^1/2) dx The method I used is seeing the solid as a washer(? Can someone help me

2. ## Chemistry

A student prepared 200mL of 0.01M solution of calcium phosphate, Can(PO4)2. What is the concentration of calcium in parts per million? Relative atomic masses Can =40, P =31, O =16

3. ## math

Owen and Ethan have \$175 together. How much money does each of them have if Ethan has \$33 more than Owen?

4. ## Statistics

A. In a given normal distribution, the sample mean is 75 and the sample standard deviation is 4. Find the corresponding standard score of the following values: 1. 69 2. 85 3. 70 4. 65 B. In a given normal distribution, the population standard deviation is

5. ## Statistics

(GRAPH) Sketch a normal curve that has a mean of 15 and a standard deviation of 4. On the same x-axis, sketch another normal curve that has a mean of 25 and a standard deviation of 4. Describe the two normal curves.

6. ## Statistics

Find the area under the normal curve in each of the following cases. 1. Between z = 0 and z = 1.63 2. Between z = 1.56 and = 2.51 3. Between z = -0.76 and z =1.35 4. Between z= -0.26 and z = -1.76 5. To the left of z = 2.35 6 To the right of z = -1.31 7.

7. ## Geography

Calculate the distance between town a latitude (30n) and town b on(latitude 70)

8. ## Physics

A projectile is kicked horizontally off a tall building with an initial velocity of 13.7 m/s. The projectile lands 56.2 m away from the base of the building. How long is the projectile in the air? How tall is the building? What is the velocity of the

9. ## Chemistry

How to identify anions

10. ## Chemistry

Calculate the weight of anhydrous Na2CO3 necessary to prepare M/20 solution in 100cm3 volumetric flask

11. ## Chemistry

How much Na2CO3 would you weigh to prepare M/20 Na2CO3 solution in 100cm3 volumetric flask?

12. ## Math

Find the roots using quadratic formula 1. X^2+7x =4 2. 4x^2 - 4x +1=0

13. ## Math

1. Make a sketch of 5 rectangular open boxes such that a. the height of the boxes are the same, b. The boxes can hold 249cm^3, 504 cm^3,810 cm^3 and 468 cm^3 respectively. 2. Solve each quadratic equation by completing the square to determine the

14. ## cpcc

a small plane is traveling due south a t a velocity of 90 m/s. It suddenly encounters a tailwind of 27 m/s heading due south. what is The "air velocity" of the plan stays the same....but what is the resultant velocity (aka..."ground velocity") of the

15. ## Algebra

On a summer day in Cape Cod, the depth of the water at a dock was 4ft at low tide at 2:00 AM. At high tide 5 hours later, the heist of the water at the dock rose to 14 feet. Write a cosine function to model the height of the water at the dock x hours after

16. ## math

If a basketball player missed 41 free throws out of 100, what fraction and what percentage of free throws did the player make?

17. ## intermediate algebra

1. Two numbers differ by 8. If one-half the larger is added to one-fourth the smaller, the resulting sum is 22.Find the numbers. 2. Ten years ago a man was three times as old as his son. In 12 more years the son is three-fifths as old as his father. How

18. ## Algebra

1. A man completing a 40km trip finds that by travelling one more km per hour, he could have made the journey in 2 hours less time. At what speed did he actually travel? 2. One pipe alone can fill a tub in 6 minutes less than it takes a second pipe alo e

19. ## algebra

1. The geometric mean between the first two terms in a geometric sequence is 32. If the third term is 4, find the first term. 2. Insert a geometric mean between k and 1/k. 3. If 2 and 3 are two geometric means between m and n, fond the values of m and n.

20. ## intermediate algebra

Mr. Lakandula would like to increase his production of milkfish due to its high demand in the market. He is thinking of making a larger fishpond in his 8000 sq. m lot near a river. Help Mr. Lakandulaby making a sketch plan of the fishpond to be made. Out

21. ## Algebra

For each of the following expressions, determine all of the values of k that allow the trinomial to be factored over the integers. A) x^2 + kx - 19 B) 25x^2 + kx + 49 C) x^2 + kx + 8

22. ## analytic geometry

1. The orbit of the earth is an ellipse with the sun at a focus, the semi-major axes 93 million miles and the eccentricity is 1/60. Find the greatest and least distance of the earth from the sun. 2. A battle shipping is sailing at a straight line towards

23. ## analytic geometry

1. Find the longest and shortest distance from (10, 7) to the circle x^2 + y^2-4x-2y-20=0 2. From the start, a man runs 4km towards north, 3 km towards east and takes a rest. Draw the line from starring point to resting point and line from resting point to

24. ## analytic geometry

1. Given the parabola defined by y^2 =-12x, find the coordinates of the focus,the length of the latus rectum and the coordinates of its endpoints.Find also the equation of the directrix. Sketch the curve. 2. Find the eccentricity of an ellipse when the

25. ## analytic geometry

1. Find the equation of the asymptotic of the hyperbole x^2/9 - y^2/ 4 = 1. 2. Given the equation of a function 2x^2 + 5y^2 - 16x + 20y + 108 =0, translate the original so that the New equation will have no first degree terms. 2. Find the radius and the

26. ## analytic geometry

1. Given the parabola defined by y^2 = -12x, find the coordinates of the focus, the length of the latus rectum and the coordinates of its endpoints. Find also the equation of the dielectric. Sketch the graph. 2. Find the eccentricity of an ellipse when the

27. ## analytic geometry

Determine the acute angle between the lines 3x - 7y = 21 and 5x + 3y = 15.

28. ## Algebra

1.A motorcycle has a reserved fuel of 0.5 liter which can be used if it's 3-liter fuel tank is about to be emptied. The motorcycle consumes at most 0.5 liter fuel for every 20 km of travel. a. What mathematical statement represents the amount of fuel that

29. ## epcc

How many moles of aluminum ions are present in 0.80 mole of Al2(SO4)3

30. ## Math

A speed boat travels at a rate of 20 km per hour in still water. It travels 55 km upstream the same time it travels 90 km downstream. What is the rate of current?

31. ## Medical Billing and Coding

I need a CPT code for an outpatient hospital scenario, Radiology Report. Examination: MRI of brain with contrast. Clinical symptoms: Slurred speech, right arm weakness. Magnetic resonance examination of the brain was performed prior to contrast utilizing

32. ## Medcal Billing an Coding

I am stuck on this one coding scenario I'm hoping you can help me. I have gotten CPT code 90947 or 90945 but I am unsure which is the right one? I need a CPT code for an inpatient hospital scenario, Dialysis Progress Note. The patient was seen during CAPD

33. ## ALGEBRA

A car travels 20 kph faster than a truck. The car covers 350 km in two hours less than the time it takes the truck to travel the same distance. What is the speed of the car? How about the truck?

34. ## ALGEBRA

In a water refilling stationthe time that a pipe takes to fill a tank is 10 minutes more than the time that another pipe takes to fill the same tank. If the two . If the two pipes are open at the same time, they can fill the tank in 12 minutes. How many

35. ## physics

Find d electrostaticforce of a q1 to other charges.express ur answer as magnitude n direction

36. ## MATH

If I put \$300 in an account that earns 5.5%, how much will there be in the account at the end of 21 years?

37. ## Physical Science

Beginning at rest, you accelerate at a rate of 2.5 m/s^2 for 12 seconds. What is your final velocity?

38. ## Math

Sara cycled 11 miles from home to ranch in 1 1/2 hour. How many miles did she cycle per hour?

39. ## statistics

In this question, use Excel functions rather than Normal distribution tables. The number of new cars sold by "Ma's New Car Factory" in a financial year can be approximated by a normal distribution with a mean of 125,000 cars and a standard deviation of

40. ## History

Can I study Archeology while I did mathematical Literacy at school ?

41. ## Math

Sue buys 8.5 pounds of chicken to make tacos. She uses 0.3 pound of chicken for each taco. How many tacos can sue make?

42. ## physics

A particle travels to the right at a constant rate of 6.1 m/s. It suddenly is given a vertical acceleration of 1.8 m/s 2 for 4.5 s. What is its direction of travel after the acceleration with respect to the horizontal? Answer between −180◦ and +180◦

43. ## Cult Anthro

Running amok (murderous raging) in Malaysian culture susto,spirit attack in Latin America,and fright in Carribean are example of what

44. ## life orientation

in 10-15 lines critically discuss 5 ways in which the human or environmental problem impact on the community

45. ## Algebra

Input 16 output 2 input 24 output 4 input 40 output 6 input 52 output 8 find y if x is given. X is input

46. ## Algebra

Input 16 output 2 input 24 output 4 input 40 output 6 input 52 output 8 find y if x is given. X is input

47. ## World History

In what ways did Islam create the first “world civilization?” How was Islam changed by contact with indigenous faiths in Africa & Asia? How did Byzantium preserve & perpetuate the traditions of Rome? What roles did commerce play in the transmission of

48. ## Hamilton

Julia studied math 3 1/3 hours during the 4 days before her last test. what was the average amount of time she studied each day

49. ## Algebra

I hope I can explain this. I can't draw the shape here, but it is a triangular prism that looks like a wedge of cheese. The height is 20 cm and the three sides are 13, 37, and 40 cm. There is also a line drawn from the corner of the two sides that are 13

50. ## Algebra - area

I hope I can explain this. I can't draw the shape here, but it is a triangular prism that looks like a wedge of cheese. The height is 20 cm and the three sides are 13, 37, and 40 cm. There is also a line drawn from the corner of the two sides that are 13

51. ## Algebra - volume

I can't draw the shape here, but the picture is of a 3-sided pyramid. One side of the base is 10", another side of the base is 3", and the height is 15". I need to find the volume and round to the nearest whole number.

52. ## United States Constition

Details: Part I: Principles of the Constitution Create a chart or a matrix outlining the following primary principles of the Constitution: 1. Self-Government 2. Separation of Powers 3. Checks and Balances Write an analysis of 250-500 words on the

53. ## U.S. constitution

Using 750-1,000 words, create a chronological narrative delineating the significance of the documents/events listed below that impacted the evolution of the United States Constitution. In your narrative, discuss each of the documents and/or events listed

54. ## POS-301-0101 arizona government

Using 750-1,000 words, create a chronological narrative delineating the significance of the documents/events listed below that impacted the evolution of the United States Constitution. In your narrative, discuss each of the documents and/or events listed

55. ## Math

Given the function f(x)=5x(x-1)(x+7) FInd the largest non-negative x-value for which f(x)=0

56. ## geometry

Do the following playing cards have symmetry: 4 of Spades; 9 of Clubs; 7 of Diamonds; 5 of Hearts? If so, explain the type of symmetry.

57. ## math

Now, think of a set of domain and range from your own life. Write a paragraph on whether you think your particular domain and range is or is not a function and why. I need a life a example? is it a function?

58. ## precalulas

solve each equation over the given interval 2x=cosx for all values of x

59. ## human services

how success wisconsin human services in meeting the needs o its demographic group

60. ## Chemisty

Carbon dioxide is usually formed when gasoline is burned. If 30.0 L of Co2 is produced at a temperature of 1.00 X 103 C and allowed to reach room temperature (25.0 C) without any pressure change, what is the new volume of the carbon dioxide?

61. ## chemistry 101

if you had 14 moles of octane how many moles of carbon dioxide would you get?

62. ## American History

I need asap homework help

63. ## American History

Create a timeline tracking the major themes/paradigm shifts in American History from the Columbus's voyages through the Mexican-American War (1846-1848).

64. ## American History

Create a timeline tracking the major themes/paradigm shifts in American History from the Columbus's voyages through the Mexican-American War (1846-1848)

65. ## Science

how many atoms of carbon in 18 grams of C3H8o

66. ## algebra

did I solve the problem correctly? c=\$200+\$50h c=\$300+\$25h is the answer c=\$250 c=\$325 Do all I have to do to this equation is to add them to get the total cost of labor with h=labor per hour and c=cost or do I have to solve it in a different way. I'm

67. ## algebra

For me to solve the system of equations for the total cost of lawn care using the tequnique substitution am I right to say: c=\$200+\$50h c=\$300+\$25h would be c=\$250 c=\$325

68. ## algebra

If my equation that I wrote does it matter how it is written. Does it matter if I write it' \$200+\$50h=c or c=\$200+\$50h or c=\$50h+200

69. ## algebra

I have a problem with break even analysis? the question is I'm trying to find the cost between 2 businesses to care for my lawn. The one company has an initial fee of \$200+\$50an hour for labor cost and the second company has an initial cost of \$300+\$25an

70. ## Physics

It is easy to see a drop of water on the print of a glossy magazine but it is difficult to see it on the white area of the same page. Explain why.

71. ## Chemistry

2Al + 3CuSO4 --> + 3Cu + Al2(SO4)3 * copper(II) sulphate is a hydrate 1.2g of CuSo4 50mL of water 1.0 g of aluminum foil What is the limiting reactant?

72. ## Physics

Could a simple machine such as a lever, a pulley system or a hydraulic jack be considered a heat engine?

73. ## Physics

Which of these types of motors or engines are heat engines? a. an automobile engine b. an electric motor c. a steam turbine

74. ## Physics

A 0.12-kg ball traveling with a speed of 40 m/s is brought to rest in a catcher's mitt. What is the size of the impulse exerted by the mitt on the ball?

75. ## Physics

A bowling ball has a mass of 6 kg and a speed of 1.5m/s. A baseball has a mass of 0.12 kg and a speed of 40 m/s. Which ball has the larger momentum?

76. ## Physics

A 0.4-kg ball has a velocity of 20 m/s. a. What is the kinetic energy of the ball? b. How much work was required to lift the box to this position?

77. ## economics

explain why the marginal cost curve is equal to the supply curve for a monopoly

78. ## ECONOMICS

WHAT IS HORIZONTAL INTERGRATION

79. ## economics

wHAT IS VERTICAL INTERGRATION

80. ## Accounting

Nafari Company's sales budget has the following unit sales projection for each quarter of the calendar year 2011. January -March 1,080,000 April-June 1,360,000 July-September 980,000 October-December 1,100,000 Total 4,520,000 Sales for the first quarter of

81. ## Accounting

Nafari Company's sales budget has the following unit sales projection for each quarter of the calendar year 2011. January -March 1,080,000 April-June 1,360,000 July-September 980,000 October-December 1,100,000 Total 4,520,000 Sales for the first quarter of

82. ## language arts

I need a list of verbs and one of adjectives I can use to make my story more interesting

83. ## accounting

I have answer a hypothetical situation question as to what advice I would give to a business owner whose business in growing on how to make her accounting work more efficient. She manually enters in cash sales daily, makes purchase orders over the phone,

if a perimeter of a garden is 82 feet. the length is 5 more than twice the width.what is th width of the garden?

85. ## staistics/ math

A statistician needs to survey a sample of 50 people that is representative of voters in his community. He prepared a list of phone numbers of 50 randomly selected, expected voters. Next morning, he came to work at 8:00 and began to make calls. By 11:00

86. ## math

The United Nation declared that the world's six-billionth inhabitant was born on October 12, 1999 in Bosnia. Don't discuss what is not said. Discuss what is said. what is wrong with this statement according to what is allowed in statistics?

87. ## statistics

. A statistician needs to survey a sample of 50 people that is representative of voters in his community. He prepared a list of phone numbers of 50 randomly selected, expected voters. Next morning, he came to work at 8:00 and began to make calls. By 11:00

88. ## math

EF is a median of isosceles trapezoid ABCD. Find EF if AB is equal to 3 inches, and CD is equal to 11 inches.

89. ## english

what is the value of a word

90. ## Physics

A train is sounding a horn of constant frequency shows down as it nears a station. What change in pitch is heard by a commuter standing in the station?

91. ## Intro to LAN technologies

58. You have been contracted to build a network for a multimedia development firm that currently uses a 10-Mbps Ethernet network. The company requires a high-bandwidth network for the multimedia team, which constantly views and manipulates large files

92. ## physics

What is the acceleration of the system if both blocks have a mass of 5.0 kg, and the coefficient of kinetic friction is 0.11? [___/4] (b) Determine the tension in the rope.

93. ## physics

using the strap at an angle of 31° above the horizontal, a Grade 12 Physics student, tired from studying, is dragging his 15 kg school bag across the floor at a constant velocity. (a) If the force of tension in the strap is 51 N, what is the normal force

94. ## physics

1)The difference of potential between terminals of a battery is 6V. How much work is done when a series of negative charges totaling 0.5 C are moved from one terminal to another? 2) Two parallel metal plates have opposite charges and a difference of

how many diffent arts are there in the whole world

96. ## art

how mant difernet arts pices are there

97. ## algebra

need help with fractions

99. ## Chemistry

What effect do each of these have on the freezing point of the solvent? a. a nonvolatile solute that dissociates in the solvent b. a volatile solute that does not dissociate c. two solutes that react according to the equation: A+B---> C Please explain why.