# Louis

Popular questions and responses by Louis
1. ## Math

Two faucets can fill a tank in 1 hour and 20 minutes. The first faucet takes more than two hours longer to fill the same tank when functioning without the second tap. How long does it take to fill each one separately? Explain your solution

2. ## math

At the end of the summer, Walgreens advertised blow-up pools for 66% off the regular price. Jeff Jones saw a pool with a regular price of \$49.99. What is the dollar markdown? A. \$33.99 B. \$39.29 C. \$32.99 D. \$33.39

3. ## Calculus

The base of a solid in the xy-plane is the circle x^2+y^2 = 16. Cross sections of the solid perpendicular to the y-axis are semicircles. What is the volume, in cubic units, of the solid? a. 128π/3 b. 512π/3 c. 32π/3 d. 2π/3

4. ## Chemistry

Need help solving this problem. A 0.188g sample of unknown metal, X (s), produced 71.4ml of hydrogen gas when reacted with HCl according to the equation: X(s)+2HCl(aq)--> XCl2(aq)+H2(g) The gas was collected over water at 23 degrees C. The levels of water

5. ## physics

Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. The lasers produce separate interference patterns on a screen a distance 4.90m away from the slits a)What is the

6. ## Calculus

The region in the first quadrant bounded by the x-axis, the line x = π, and the curve y = cos(cos(x)) is rotated about the x-axis. What is the volume of the generated solid? a. 1.921 b. 3.782 c. 6.040 d. 8.130

7. ## Physics

A cylindrical blood vessel is partially blocked by the buildup of plaque. At one point, the plaque decreases the diameter of the vessel by 52.0%. The blood approaching the blocked portion has speed v0. Just as the blood enters the blocked portion of the

8. ## physics

A football is thrown from the edge of a cliff from a height of 22 m at a velocity of 18 m/s [39degrees above the horizontal]. A player at the bottom of the cliff is 12 m away from the base of the cliff and runs at a maximum speed of 6.0 m/s to catch the

9. ## math

Calculate the consumers' surplus at the indicated unit price p for the demand equation. HINT [See Example 1.] (Round your answer to the nearest cent.) p = 150 − q; p = 30

10. ## Chemistry

what is the balanced equation of: Combination reaction: Li2O(s)+H2O(l)-->(?) I know what a combination reaction is but I don't know how to do it when it is complex like this one.

11. ## Physics help!!

Assume: A 78 g basketball is launched at an angle of 56.8◦ and a distance of 10.4 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as

12. ## Maths probability

Numbers is a game where you bet \$1.00 on any three-digit number from 000 to 999. If your number comes up, you get \$750.00. Find the expected winnings.

13. ## Math

Akite is 15m up in the sky. The angle the string makes with the ground is 50 degrees. How long is the kite string?

14. ## world history

can someone please check my answers 1.)the cossacks were nomadic people who a.led the russian expansion overseas b.led the russian expansion eastward toward siberia c.led the russian political expansion south and west d.led the russian expansion to the new

15. ## Organic Chemistry

Draw only the different stereoisomers for the following compounds: a) 2,4-diiodohexane b) 1-s-butyl-3ethylcycloheptane

16. ## math

a job pays a salary of 18,000 the first year. during the next 18 years,the salary increases 7% each year.what is the total lifetime salary over 19 years

17. ## Pre-Calc

Find all solutions of the equation in the interval [0, 2pi). Show all work. sin(x+(pi/6))-sin(x-((pi/6))=1/2

18. ## pol

In Marbury v. Madison, the Supreme Court established the principle of constitutional review by

19. ## Math

Lyle is putting his videotapes on a shelf.the shelf is 12 inches long.if each videotape is 1 1/2 inches wide,how many videotapes can he put side by side on the shelf?

20. ## chemistry

Say you have two substances, A and B. A has a melting point of 300 degrees Celcius, while B has a melting point of 200 degrees Celcius. If you took a mixed melting point where the ratio of A is higher than B, what would the melting range look like? Would

21. ## physics

A ball is thrown at 19 m/s at 41° above the horizontal. Someone located 30 m away along the line3 of the path starts to run just as the ball is thrown. How fast, and in which direction, must the catcher run to catch the ball at the level from which it was

22. ## physics

A ball is thrown at 19 m/s at 41° above the horizontal. Someone located 30 m away along the line3 of the path starts to run just as the ball is thrown. How fast, and in which direction, must the catcher run to catch the ball at the level from which it was

23. ## Math

1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m? If paint caosts \$29.95 per can and there is a 12% tax. How much would it cost to paint the ceiling?

24. ## Chemistry

A 185.325 g sample of a compound of carbon, nitrgoen and hydrogen is burned completely. Calculate the empirical formula if 225.0 g of water and 230.0 g of NO2 is formed. In another experiment the sample was found to have a density of 10.9 g/L at 1.20 atm

25. ## Chemistry

Nickel metal reacted with oxygen: Ni (s) + O2 (g) --> Ni2O3 (s). 95.00g of Nickel is reacted with 2.000L oxygen at 10.56 atm and 30.00 degrees Celsius. At the end of the reaction the pressure was reduced to 7.56 atm at the same temperature and volume. How

26. ## Chemistry

A piece of Na metal undergoes a complete reaction with H2O (l0 to produce sodium hydroxide and hydrogen. If 24.0 g of Na in a 3.50 L container is reacted with an excess amount of water at 25 degrees Celsius, calculate the total pressure (in atm) in the

27. ## calculus

Calculate the left Riemann sum for the given function over the given interval, using the given value of n. (When rounding, round answers to four decimal places.) f(x) = e^−x over [−6, 6], n = 6

28. ## math

find x for a triangle that has 100 degrees and 47 degrees.

29. ## College Geology Homework

Suppose you have a sample of potassium feldspar from a rhyolite and you measure the ratio of atoms of 40Ar to 40K of 0.024 to 1, or for every 10000 atoms of 40K you find 240 atoms of 40Ar. For this problem, consider the decline of 40K from an initial value

30. ## chemistry

What is the chemical composition of ozone, carbon dioxide, salt and water

31. ## economics

in general the role of board of directors is to: a) direct the day-to-day activities of the firm b) represent investor interests in management of the firm c) insure that the firm operates legally d)provide staff assistance to the CEO in strategic matters

32. ## Science

Air is composed of nitrogen, oxygen, argon, carbon dioxide, and other gasses. How may air be best described? a) a compound b) a mixture c) a solution d) an alloy e) an amalgam

33. ## Computer graphics

Determine the equation for a cubic spline segment passing through two end points A (0, 5) and B (10, 20), having a slope of 2 and a curvature of -0.5 at A. Equation for cubic spline is:

34. ## Physics

A man holds a child on his shoulders while watching a football match.How much work has he done if the game lasts for 2 hours?

35. ## Math

A pizza company has 15 toppings to choose from A. One topping is anchovies. How many different 3 topping pizzas do not include anchovies? B. There are 6 vegetable toppings. How many different 3 topping pizzas have no vegetables? C. How many different 3

36. ## Math

How many possible numbers are between 1 and 1000000000 that are greater than 72000 if we only use the following digits (4, 5, 6, 7, 8)

37. ## Math

The trigonometry practice exam has 6 questions with the answer A 8 questions with the answer Baby 10 questions with the answer C and 9 questions with the answer D The number of different answer keys that can be created with the letters above is A. 2.27 ×

38. ## Math

Using a standard deck of 52 cards how many 5 card hands contain A. 2 queens? B. 3 fives? C. At most 2 sevens? D. One pair and one three of a kind?

39. ## Math

Determine the number of different six letter arrangements that can be formed with the letters GUIDEPOST if the last two letters must be vowels?

40. ## Math

In a given city there are 28 reporters of which 16 are men. If the committee of 4 reporters is to be formed A. How many different committees can be formed? B. How many different committees contain 3 men? C. How many different commitrees contain at least 2

41. ## Calculus

Determine if the Mean Value Theorem for Integrals applies to the function f(x) = x^3 − 16x on the interval [−1, 1]. If so, find the x-coordinates of the point(s) guaranteed to exist by the theorem. f(a)=15 f(b)=-15 f'(x)=3x^2-16 f'(c)=-15 I am now lost

42. ## Calculus

Evaluate the integral: the integral of the cube root of x, dx. a. (3/4)x^(4/3)+C b. (3/2)x^(2/3)+C c. 1/(3x^(2/3))+C d. None of these I got (3x^(4/3)/4)+C. I was wondering if it would be D.

43. ## Organic Chemistry

Draw all the possible conformations for the following compounds and rank their stability (#1 least stable). a) 3-chloro-2-methylpentane rotating between c-3 and c-4 b) 1-cyclopropyl-2-flurocyclohexane

44. ## Biology - Lungs

Why are there so many bronchioles in the body?

45. ## Math

Combine like terms: 1. -21a + 16a A -5a B 5a C 37a D -37a** 2. 5 (x + 10) + x A 6x + 15 ** B 5x + 15 C 6x + 50 D 4x - 50

46. ## Math

Solve the equation. 1. y-5/3 =1 A -2 *** B 8 C 18 D 6 2. 6x + 29 =5 A -4 B -18 ** C 204 D -144

47. ## Math

Solve each equation. Write each equation in simplest form. -6q + 5.8 = 23.8 A q = 3 B q = -3** C q = 1.83 D q = 4.93

48. ## Math

Solve for x 2 (3+x)= 5x+54

49. ## algebra

where does the parenthesis go on the equation 5x(3+2)-2+5x3=4

50. ## economics

Entrepreneurs in the shoeshine stand business earn 11000 a year Joe pays the rent of 500 a year and his total revenue is 16000 a year.he borrowed 600 at 20 percent a year to buy equipment.at the end of the year Joe offered 400 for his business and all his

51. ## Algebra 2

So I solved this problem but, strange as it sounds, I don't know how to do the work. Here's the question: One number is eight less than another number. The sum of the numbers is eighty. Find both numbers. Here's what I've got: y-8=x x+y=80 x=36 y=44 I

53. ## Physics

A daring 510-N swimmer dives off a cliff with a running horizontal leap. What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

54. ## math

16. A picture of a star has 6 identically matched points. What is the least number of degrees that you can rotate the star onto itself? (1 point) 60° 120° 180° 240 How do i figure this out?

55. ## pol

Article III of the Constitution establishes that

56. ## math- Calc

a spherical balloon is filled with water. if the water is leaking out at a rate of 2 cm^3/min, find the rate at which the radius is changing when the volume is v=1000cm^3?

57. ## physics

A missile is fired horizontally with an initial velocity of 300 m/s from the top of a cliff 200.0 meters high. a. How long does it take the missile to reach the bottom the cliff? b. How far from the base of the cliff does the missile strike the ground?

58. ## ALGEBRA 1 HELP

Your hole punch makes holes in your that have diameter of 4^-1 inch. a.Write an expression for the area of one punched hole. Use the formula for the area of a circle A=:r^2. (: is pi sign) b.Your hole punch makes three holes in a page . Write an expression

59. ## physics

A baseball is hit at a height of 1.1 m with an unknown initial velocity at 38 ° above the horizontal. It just clears a barrier of height 36.1 m at a horizontal distance of 63.0 m. Find: a) the initial speed;

60. ## physics

A baseball is hit at a height of 1.1 m with an unknown initial velocity at 38 ° above the horizontal. It just clears a barrier of height 36.1 m at a horizontal distance of 63.0 m. Find: a) the initial speed;

61. ## Math

I posted these questions earlier a lot of times but noone answered them and i really need help so can someone help me. i don't want all the answers, can someone just do like the first 2 so i get an example of how to do them. thanks 1. represent each with

62. ## Math 4 questions

I posted these questions earlier but noone answered them and i really need help so can someone help me. 1. represent each with an ineqaulity a.) time spent on the activity can be at most 13 mins b.) the volume of the container must be a minimum of 1.8 L

63. ## Math help urgent

I have a few questions that i need help with so can someone pleese help me thanks:) 1. represent each with an ineqaulity a.) time spent on the activity can be at most 13 mins b.) the volume of the container must be a minimum of 1.8 L and a max of 2.5 L 2.

64. ## science

how might the shape of the hairlike structures relate to their function? Thanks.

65. ## chemistry

The specific heat of a certain type of metal is 0.128 J/(g·°C). What is the final temperature if 305 J of heat is added to 53.3 g of this metal initially at 20.0 °C?

66. ## TO MS SUE

Also Ms.Sue can you try and find me food web of the organsims affected my copper because I also need that in my project. A picture woule be great.

67. ## TO MS SUE

ms sue I got most of the answers but im stuck on this one, can you just tell me the answer, it will save my time and help me A LOT : what organisms are affected by copper? this is all i need, thanks :)

68. ## SCIENCE

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by

69. ## SCIENCE URGENT HELP

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by

70. ## Science

what are some health risks of copper to humans? what are the environmental riks of copper? what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term

71. ## Managerial Accounting

Why is the salary of a production worker capitalized while the salary of a marketing manger expensed?

72. ## maths

Let be the center of the circle , and be a point outside of circle . is tangential to at , and intersects at . If and , what is the radius of .

73. ## TO MS SUE

REMEMBER WHEN I POSTED THIS QUESTION. 1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m? If paint caosts \$29.95 per can and there is a 12% tax. How much would

74. ## physics

A soccer player kicks the ball toward a goal that is 18.0 m in front of him. The ball leaves his foot at a speed of 19.3 m/s and an angle of 27.0 ° above the ground. Find the speed of the ball when the goalie catches it in front of the net.

75. ## physics

An airplane with a speed of 80.9 m/s is climbing upward at an angle of 64.5 ° with respect to the horizontal. When the plane's altitude is 795 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly

76. ## physics

A rocket is fired at a speed of 91.0 m/s from ground level, at an angle of 49.0 ° above the horizontal. The rocket is fired toward an 21.4-m high wall, which is located 25.0 m away. The rocket attains its launch speed in a negligibly short period of time,

77. ## physics

An eagle is flying horizontally at 5.8 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?

78. ## physics

A tennis ball is struck and departs from the racket horizontally with a speed of 26.9 m/s. The ball hits the court at a horizontal distance of 18.1 from the racket. How far above the court is the tennis ball when it leaves the racket?

1.My family went to starbucks. My daughter and myself ordered drinks that were the same price. My son's drink was 5.00 dollars more than my drink. The total bill was \$18.50. How much was each drink? 2.There were candies on the table. Andy grabbed 50% of

80. ## math

Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)

81. ## IB Math Studies

I saw a similar post earlier. I also want to see who has better memory out of men and women. I was thinking of testing ability to remember a series of simple objects or number sequences. Could I use chi-squared, HOW could I use it? Any other sophisticated

82. ## Garde 12 Calc

Determine the work done by force f=[1,4] in newtons for an object moving along the vector d =[6,3] Okay i found the vector equation and then the parametric and now i have no clue what do please help :)

83. ## physics

a spacecraft is traveling in space fa from any planets or stars. How much force is required to maintainthe spacecraft's speed?

84. ## health accounting

explains the relationship between finance and accounting, and how they operate to determine financial viability within a health care organization.

85. ## math

whats the amount due today on 8000.00 at 7% from june 23. 2008

86. ## Science

We made t-pentyl Chloride in Lab today using HCl and t-pentyl alcohol. I know t-pentyl chloride is not soluble in water, but I'm still not sure the answer to some of my post lab questions. I've answered a few, but I have 3 that still confuse me. We

87. ## Physics

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 35.4 m/s. At the same time, it has a horizontal velocity of 57.2 m/s. At what speed does the vehicle move along its descent path? At what angle with the

88. ## Physics

A truck travels beneath an airplane that is moving 120 km/h at an angle of 24◦ to the ground. How fast must the truck travel to stay beneath the airplane?

89. ## Physics

An airplane ﬂies 137 km due west from city A to city B and then 412 km in the direction of 46.5◦ north of west from city B to city C. What is the distance between city A and city C? Relative to city A, in what direction is city C? Answer with respect

90. ## Physics

A person walks 28.2◦ north of east for 3.33 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk?

91. ## Chemistry

Helium gas is added to a 2.00 L container at 23 degrees Celsius containing Neon and Argon with a pressure of 725.3 mm Hg, what is the mass of Nitrogen added if the pressure is increased by 50%.

92. ## Algebra

Find the 20th digit of 1.8984375E-20

93. ## college algebra

I don't understand the steps for doing synthetic division in college algebra

94. ## poem

How do the differences and/or similarities between speech and poetic form affect the experience "In Memoriam"

95. ## Physics

Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness

96. ## Mathematics

The difference between the x-coordinates of two points on the parabola y^2=4ax is fixed at 2k. Find the equation that describes the position(xp, py)of the point of intersection P of the tangents at the two points. The equation is in the form yp^2=f(xp).

97. ## Chemistry

What is the pH when 25 mL of .20 M CH3COOH has been titrated with 35 mL of .10 M NaOH?

98. ## chemistry

if i have a molar concentration of acetic acid.046 mol/L how do i get the calculated molar mass of acetic acid

99. ## Social studies

History of social studies in britain