# Xavier

Newest questions and responses by Xavier
1. ## Biology

Conservationists establish that the minimal viable population of a population of tigers in an extensive geographical area is 16. The current population of tigers is 10. What is likely to happen to the population of tigers? A. Tigers from adjoining

2. ## Math

Janie couch is 7 1/2feetlong the scale of the dollhouse is 1inch:2feet what is the length if the miniature couch for the dollhouse

3. ## Math

In the Greenwich Public Library, about one-tenth of the books are overdue when they are returned. An average of 580 books are returned to the library each day. About how many books could be expected to be returned on time each day?

4. ## Math

one of the valves on the hoover dam releases 40,000 gallons of water per second. what is the rate in gallons per minute?

5. ## Math

A man fishing in Lake Erie near Erie, Pennsylvania, speared that state's record carp while bow fishing. The fish was 49 inches long and weighed 54 pounds, 4 ounces. to the nearest thousandth of a pound, how many pounds per inch is that?

6. ## Math

It makes 3/4 of an hour for an automated sprinkler to cover 2/7 of a lawn.After an hour has passed ,what fraction of a lawn has been covered

7. ## Math

what is 420/69

8. ## Social studies Grade 7

Why was northern Italy a natural birthplace for the Renaissance? Anything would help. Thanks.

9. ## math

True or false 1.) The set of integers contains the set of rational numbers 2.)Every repeating decimal is a rational number 3.)Every square root is an irrational number 4.) the set of whole numbers contains the set of rational number 5.)every terminating

10. ## algebra

I can't find any good videos but does anybody here know how to do something like sin 65° by hand

11. ## Algebra

How many solutions as a system of equations have? 2X= -10y + 6 & x+5y=3

12. ## Calculus

Two horizontal forces,  and , are acting on a box, but only  is shown in the drawing.  can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that  = +4.2 N

13. ## Trigonometry

Determine the angular velocity if 2.5 revolutions are completed in 10 seconds. Round to the nearest tenth.

14. ## Trigonometry

Write an equation of sin with amplitude = 2, period = 2pi, and vertical shift = 5

15. ## Trigonometry

Write an equation of cotangent with period = 3pi, phase shift = -pi, and vertical shift = -1

16. ## trigonometry

Write an equation of secant with period = pi, phase shift = -pi/2, and vertical shift = 3

17. ## PE

why do you think it is necessary to identify your values when using the decide process to make the important decision

18. ## english

why does tasha the narrator in the tail think that her summer is ruined

19. ## physics

On a banked race track, the smallest circular path on which cars can move has a radius of 101 m, while the largest has a radius of 163 m, as the drawing illustrates. The height of the outer wall is 19.0 m. Find (a) the smallest and (b) the largest speed at

20. ## Math

I would like to put these fractions in order from least to greatest: 3/8, 5/8, 4/8, 2/8, 7/8

21. ## Algebra

A square has an area of 400 square miles. What is the length of each side of the square?

22. ## math

Maggie has a box of 300 colored blocks.The box has a equal number of green and blue blocks and an equal number of red and yellow blocks.If Maggie arranged all of the green blocks in stacks of 10 and all of the blue blocks in stacks of 7,how many yellow

23. ## history

how did farming in the northeast differ from that in the south

24. ## Physics

A tangential force acts on the rim of a 2.0 kilogram disk-shaped wheel (0.50 m radius) and gives the wheel an angular acceleration of 4.8 rad/s^2. Neglect friction and find the magnitude of the force.

25. ## English

How does the setting of this memoir affect its plot? What does this question means? memior? affect its plot?

26. ## English

It was a night to remember. Marian Anderson was one my favorite singers. Her rendition of the song “Were You There” ran through my head as we walked toward the Metropolitan Opera House. Of course, I listened to the radio when she sang at the Lincoln

27. ## Physics

A cannon ball is fired horizontally with an initial speed of 75 m/s from the top of a 50-m tall building. When the ball hits the ground, its velocity vector makes an angle θ with the horizontal. What is θ

28. ## Chemistry

Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in. Any ideas on solving this? The answer is 2.7 lbf*ft.

29. ## Need help badly, Science

Suppose the incident sunlight at ground level has a power density of 0.87 kW m−2 at noon. What is the maximum rate of loss of water from a lake of area 1.0 ha? (1 ha = 104 m2.) Assume that all the radiant energy is absorbed. any ideas on how do i get

30. ## Math

Bobby has some marbles.one-third of them are blue.one-half of them are red and the rest are green.if he has 7 green marbles, how many marbles does have altogether?

31. ## material balance

Wet air containing 4.0 mole% water vapor is passed through a column of calcium chloride pellets. The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column packing was initially dry and had a mass of 3.40kg. Following

32. ## Calculus II

Solve the initial value problem using Taylor Series and the following conditions: y'(t) = y(t) + 2t y(0) = A

33. ## media

I realize that this may sound like a unique question, but please humor me anyway. Is there a place where people can efficiently watch relatively recent movies in their entirety for free? Or is that illegal?

34. ## Density Problem

The moon has radius 1740 km and mass 7.35x10^22? kg.What is its average density?

35. ## Math

the distance between the center of symmetry of a parallelogram and its longer side is equal to 12 cm. The area of the parallelogram is 720 cm^2, and its perimeter is 140 cm. Determine the length of the longer diagonal of the parallelogram

36. ## Physics

A 0.02kg bullet collides with a 5.75kg pendulum. After the collision, the pair swings up to a maximum height of 0.386m. Determine the velocity of the bullet just before impact.

37. ## Physics

A 0.02kg bullet collides with a 5.75kg pendulum. After the collision, the pair swings up to a maximum height of 0.386m. Determine the velocity of the bullet just before impact.

38. ## ALGEBRA

HOW DO I SOLVE THIS PLEASE 5ãx =ãx -12

39. ## algebra

How do I solve this problem  ã2x -7+8=11

40. ## Math, Related Rates

Consider the hyperbola y = 1/x and think of it as a slide. A particle slides along the hyperbola so that its x-coordinate is increasing at a rate of f(x) units/sec. If its y-coordinate is decreasing at a constant rate of 1 unit/sec, what is f(x)? -I

41. ## math

The Flour Power Bakery makes 200 cherry cheesecakes at a cost of \$2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost?

42. ## Physics Normal force

When an object exerts a normal force on a surface, the force is My answer is perpendicular to the surface. Am i correct?

43. ## Chemistry

What mass of KIO3 is needed to convert the copper in 0.200g of CuSO4.H2O to Cu(IO3)2? my answer is: 0.828g Cu(IO3)2 x (2*214.003 MolarM KIO3/ 413.36 MolarM Cu(IO3) = 0.857g KIO3 could you please check if i got it right

44. ## Chemistry

What mass of AgI can be produced from a 0.512g sample that assays 20.1% ALI3?

45. ## Physics

Suppose this dude wants to be able to touch the rim of a basketball goal. The rim is 3.048 m above the ground. The dude can reach up 2.45 m with his feet on the ground. (a) If the dude can achieve a liftoff speed of 2.80 m/s, what is his maximum upward

46. ## Chemistry help

Average human blood serum contains 18 mg of K+ Calculate: a) the molar concentration for each of these species; use 1.00 g/mL for the density of serum. I have worked as of this (18 mg K+/100 mL)(1mL/1g)(1 mmol/39.10mg)(1g/1000mg). But it seems that some

In the experiment of buret calibration, what is the importance of having total buret correction? And does the density of the water at a specific temperature affect this corrections?

48. ## Mathematics

If a man and a half finishes a job and a half within a day and a half, how many men can finish 3 jobs within 3 days. Please I need help, I am not so sure with my answer of 6. I would like to verify it. THANKS

49. ## Math Algebra II

I am confuse how to solve a relation function such as f(x) = 1x -12. show me example on how resolve this problem

50. ## Chemistry

Sea water contains an average of 270 ppm of sulfate ion. Calculate the molar concentration of sulfate given that the average density of sea water is 1.02 g/ml. -At first i tried assuming that density is 1.00 g/ml which is a common practice in ppm problems

51. ## chemistry

how many milliliter of .750M sulfuric acid are needed to neutralize completely 20 g of NaOH?

52. ## MATH

A tin is a right circular cylinder with a diameter of 6 meters and a height of 10 meters. What is the surface area of this tin, in terms of pi?

53. ## MATH

Posted by xavier on Monday, February 11, 2013 at 8:28pm. Hello... Asking for help with this one math question to understand how to do the rest of related question? thank you in advance.... shape 1 (3.5,-8.5) ,(3.5,-9) , (3,-10.5) , (2,-12)

54. ## math

shape 1 (3.5,-8.5) ,(3.5,-9) , (3,-10.5) , (2,-12)

55. ## Analytic Geometry

Find the equation of the parabola through (-15/4 ,2) and (0,-1) whose axis is parallel to the x-axis and the latus rectum equal to 4

56. ## Analytic Geometry

What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0

57. ## Analytic Geometry

What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0

58. ## Analytic Geometry

Find the equation of the circle, with radius 1, tangent to the line 3x+4y=5 and having its center on the line x+2y=0

59. ## Analytic Geometry

Find the equation of a circle passing through (3,7) and tangent to the lines x-3y+8=0 and y=3x. Please help me

60. ## Analytic Geometry

Find the equation of a circle passing through (3,7) and tangent to the line x-3y+8=0

61. ## Chemistry

Please help, do you have any pointers on how to use linear regression in determining the reaction order

63. ## geometry

A moving point is always equidistant from (-3,2) and the line 2x-y+2=0. What is the equation of its locus? how do you solve this?

64. ## geometry

Find the equation of a line parallel to 5x +6y = 0 at distance sqrt 61 from (-3,7) I need help please. I don't have any idea

65. ## Algebra

The first element of a geometric sequence is 1 and the common ratio is 3; determine the smallest 4 digit numeral that represents an element of this geometric sequence

66. ## geometry

find the equation of the line through (6, -3) and (-4, -7)

67. ## Analytic Geometry

Please help me to solve this problem. Find the equation of the locus of a moving point if the sum of the slopes of the line joining it to (1,3) and (4,-2) is 1.

68. ## Chemistry

The ΔHof of gaseous dimethyl ether (CH3OCH3) is –185.4 kJ/mol; the vapour pressure is 1.00 atm at –23.7oC and 0.526 atm at –37.8oC. a) Calculate ΔHovap of dimethyl ether. b) Calculate ΔHof of liquid dimethyl ether Any idead how to calculate for

69. ## Chemistry HELP

A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. just

70. ## Chemistry

A 0.75 L bottle is cleaned, dried, and closed in a room where the air is 22°C and 47% relative humidity (that is, the water vapor in the air is 0.47 of the equilibrium vapor pressure at 22°C). The bottle is brought outside and stored at 0.0°C. My

71. ## Chemistry

I need help with this problem A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside

72. ## Chemistry

At a local convenience store, you purchase a cup of coffee, but, at 98.4oC, it is too hot to drink. You add 23.0 g of ice that is –2.2oC to 248 mL of the coffee. What is the final temperature of the coffee? (Assume the heat capacity and density of the

73. ## Chemistry

A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. a) What

74. ## Chemistry

Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapour pressure of 1.00 torr at 54.3oC and 10.0 torr at 95.3oC. a) What is its vapour pressure at 25oC? b) What is the minimum number of liters of air that must pass over a

75. ## Math Help!

Kayla buys a \$20 phone card. She is charged \$0.15 per minute for long distanced calls. What equation gives the value (v) left on her card after she makes (t) minutes of long distance calls.

hello im diong meaning match for an example inter + scene = interview counter + segment of a whole = ???

77. ## social studies

GIFT OF THE NILE 1. What would be the main mineral resource in lower Egypt?

78. ## Math

Auppose f is even but g is an arbitrary function (possibly neither even nor odd). (a) Is f o g still even? Show why or why not. (b) Is g o f even? Show why or why not.

79. ## Religion

Hello I am trying to find a site that will play audio reading of the bible. Book of Roman in its entirety? Is this possible?

80. ## MATH 6TH

THANK YOU MS. SUE HOW ABOUT #3 - PATTERNS DIVIDED WITH DECIMALS TENTHS, HUNDRETHS....

81. ## MATH 6th

1. Is there a website that can show me how to divide decimals by10-1000? 2. Divide decimals by whole numbers? 3. Patterns with tenths, hundredths and thousandths? PLEASE HELPL ME - THANK YOU IN ADVANCE. JUST SOME SAMLES OF ALL THE ABOVE

do you know where I can find in abc order all of the STATES AND THEIR CAPITALS MAYBE A LINK. THIS IS FOR MY HOMEWORK TOMORROW.....THANK YOU IN ADVANCE FOR YOUR HELP!

83. ## maths

John is 3 times as old as Susan now. In 4 years time John will be 18 years older than Susan. Find John's age and Susan;s age now.

84. ## math

Susie drew a triangle with angles that measure 47, 43. and 90 degrees. What type of triangle did she draw?

85. ## chemistry

looking at all the averages on the front board, give at least three possible reasons for the values being different. classroom values from board: 10, 15, 25, 18, 39, 45

86. ## math

What 42 out of 16 simpfly

87. ## math

find the product or quotient . write the strategy you used . write model,break apart, multiplication table ,inverse operations pattern ,or doubles 56 divided by 7

88. ## gcse geography

i need to do a case study on France and i have several questions i need help with.Do you know of any good websites that can help me. Some of the questions i need to answer and are struggling with are:- *Which other capital cities/major population centres

89. ## chemistry

Which of the following would be the best technique to use in order to separate a soluble solid from a liquid?

90. ## science

a person has a hert attack and her condition is stablised but due to inflamatiom in the lung she could not breath so a machine helps her to breath and now the lung inflamation is healing .Will she be able to breath on her own once the machine is cut off?

91. ## science

what must be the genotypes of their children?

92. ## math

Jerry has 76 quarter.How much dollars do he has? I said the answer is either \$19.00 or \$76.25 which one is correct Thank you

93. ## math

the exact position of the squer root of 50 on a number line

94. ## math

I round to nearest ten these problems: 72 x 4 =290 15 x 6 =90 are these correct?

95. ## math

What is the largest three digit number you can write without using a 9 in the hundreds place or ones place, or an 8 in the tens place?

1/3 of 18

97. ## physics

One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor

98. ## physics

You weigh 516 N at sidewalk level outside the World Trade Center in New York City. Suppose that you ride from this level to the top of one of its 410 m towers. Ignoring Earth's rotation, how much less would you weigh there (because you are slightly farther

99. ## physics

One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor