# Al

Newest questions and responses by Al
1. ## Math

Which ratio is equivalent to 3/15 A) 1/3 B) 3/5 C) 1/5***** D) 15/3

2. ## math

7 1/2-1 9/10 what is the difference? PLZ Help!!!!!

3. ## physics

If you pull one end of the rope 1.4 downward with a 46- force, find the height you can lift a 170- load.

4. ## Math

Use benchmark to estimate the sum, difference, or product 14/16 + 1/5 A. 2 B. 0 C. 1/2 D. 1

1/4 divided by 3/8 and I'm so confused because I know it's division but the answers are A.1/3 B.2/3 C.3/4 D.3/8 and I just need help

6. ## Social Studies

As a result of their large oil supplies many Middle Eastern economies rely on what in oder to grow? A) automobile manufacturing B) government regulations C) exports D) tariffs

So I have this question and I don't understand Find the missing number. 32/52 ?/13 A.) 9 B.) 4 C.) 7 D.) 8 so can anyone help me please

8. ## Math

Lee walks along the edges of a rectangular pool from point A to B to C to D, a distance of 38 metres. Marina walks along the edges of the same pool from B to C to D to A, a distance of 31 metres. What is the perimeter of the pool, in metres?

9. ## Physics

An airplane traveling at 200 mph in a direction of 40 degrees north of east encounters a wind blowing east at 50.0 mph. Find the velocity of the plane measured from the ground.

10. ## physics

Machines A, B, and C do the same amount of work, but they each take a different amount of time. Machine A takes more time as compared to machine C. Machine B takes the maximum time to do the same amount of work. Which machine expends the most power doing

11. ## Physics

Water flows from a fire truck through a hose that is 11.7 cm in diameter and has a nozzle that is 2.0 cm in diameter. The firemen stand on a hill 5.0 m above the level of the truck. When the water leaves the nozzle, it has a speed of 20.0 m/s. 1) Determine

12. ## Math fractions

Jackie loves to cook fried foods. She recorded the total amount of oil that she used each month in the table below. In January she used 3/5 of the amount of oil that she used in Fedruary. Fill in the amount of oil that Jackie used in January in the table

13. ## college chemistry

How many grams of NaCN are needed to react with 50.0 g of MgCl2?

14. ## Statistics

A VP of manufacturing claims that more than 3% of items produced using a certain assembly line are defective. A random sample of 400 items is selected. At the 10% level of significance, which of the following would be part of the standardized decision

15. ## Physics

You are walking a dog when the dog sees a cat and runs away from you. You immediately run after the dog at 5.50 m/s. You jump at an angle of 29.0° to try and catch the dog. While you are in the air the dog is able to move an extra 1.34 m away from you. If

16. ## us history

You have OREGON FEVER! On your voyage west, there are many things you must plan for if you plan to make it to your final destination. Choose one of the following to complete and submit to Mrs. Sterling through webmail for extra credit. • You are

17. ## algebra

The equation f(x) = 4x2 − 16x + 9 represents a parabola. What is the vertex of the parabola? (2, −7) ( −2, 57) (4, 9) ( −4, −137)

18. ## laney college

The following questions are based on the “Mt. Dome, California,” quadrangle (Figure 33-2 found on page 228 of the Laboratory Manual; enlarged to scale 1:48,000; contour interval 40 feet) and the stereogram of the same

19. ## English assignment

I need to make a thesis statement about racism based on my two books. The two books that I chose to do was: secret life of bees and black like me. I am having trouble making a thesis. I'll give you all the information about the racism in these two books.

20. ## Chemistry

when potassium in water are combined they produced 4000.0 kJ of heat along with potassium hydroxide and hydrogen gas. how much energy would be produced if you dumped a 1.00 kg chunk of potassium into a swimming pool? s this reaction what is the enthalpy

21. ## Chemistry

When methane is combusted with excess oxygen 891 kJ of energy is produced start with 100g of methane. how much energy is produced? is this reaction endothermic or exothermic? Also provide enthalpy change for this reaction: CH4 + 2O2 (arrow)= CO2 + H2O +

22. ## Chemistry

2Fe2O3 + 6C + 3O2 -> 4Fe + 6Co2 What mass of Fe2O3 present is needed to produce 15 of iron? what mass of CO2 is released when 15g of iron is produced?

23. ## Chemistry

List Sn , Sn2+, Sn4+ in order of decreasing ionization energy

24. ## Chemistry

Element X has the highest first electron affinity in its period; the ground state electron configuration of it's most common ion is [Kr] 5s^2 4d^10 5p^6 a Element Y is the second largest element in it's period; it's valence electrons are in orbital(s) that

25. ## prealgebra

translate; the quotient of 41 and the product of a number and 35

26. ## physics

PLEASE HELP! When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘

27. ## phyics

When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘ angle with the

28. ## physics

When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘ angle with the

29. ## physics

An airplane is heading due south at a speed of 734 km/h . A wind begins blowing from the southwest at a speed of 110 km/h (average). In what direction should the pilot aim the plane so that it will fly due south?

30. ## Physics

I really need help with this question, i've found that a texbook said fourth hand, but I don't know if that's a thing Which rule is used to find the direction of force produced by electromagnetic induction? a. First right-hand rule b. Second right-hand

31. ## Physics

I need some help with a few multiple choice quadroons that I don't understand 1.EMF is best described as a(n) a. electric force. b. energy measure. c. charge flow rate. d. potential difference. 2. Which rule is used to find the direction of force produced

32. ## Math

The parking lot has 5/6 as many vans as trucks. What equation can be use to show the number of vans?

33. ## geometry

the following system of equations bounds a region. If the region is rotated about the line x=0, what is the shape of the resulting solid figure? y=-2x+4 X=0 Y=0 Y=2

34. ## physics

We have to do a lab in physics where we research and write on real life applications of momentum, the guidelines we have are Research Assignment: Application of Momentum in Real-Life Situations Task: Choose any real-life situation where the concept of

35. ## Chemistry

I have to do a lab on equilibrium, where you have to transfer water with two different sized straws, and answer questions based on that the questions are about the significance of where there is a flat line on the graph, and the significance of the point

36. ## Chemistry

I need definitions for chemistry and I can't come up with any heterogeneous reaction homogeneous reaction activation energy activation energy activated complex elementary reaction

37. ## math

Aaron earns \$1.50 for every video game he sells. When he sells one carton of 30 video games, he earns an additional \$10. What is the minimum number of video games he has to sell in order to earn \$450?

38. ## geometry

find the area bounded by a regular pentagon with radius 6 cm. round to the nearest tenth.

39. ## Math

Davida bought a pair of earrings, each in the shape of an isosceles triangle with equal side lengths of 24 mm and a base length of 16 mm. She used one earring to make another pair of earrings, similar in shape, with the base length equal to 11 mm. What is

40. ## Geometry

The circumference of a circle is 20 pi cm. Find diameter, radius, and area of the disk, the length of an arc of 90 angle and area of a 90 angle sector. Answer in terms of pi. d= ___ r= _____, disk area= _______ arc length =______, sector area =________

41. ## math

At 8 A.M., Dylan and his neighbor, Mickey, drove in their cars to a city that was 240 mi. away from their neighborhood. When Dylan reached the city, Mickey had 40 mi. to go. He finally completed the trip 48 minutes later. a) How long did it take Mickey to

42. ## Chemistry

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble

43. ## Chemistry

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble

44. ## Chemistry

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble

45. ## Chemistry

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble

46. ## math

A basket contained 75 brown eggs and some white eggs. Salima found that 15% of the total number of eggs were rotten. Of the rotten eggs,2/3 were white and the remaining 6 were brown. a) How many white eggs were there altogether? b) How many eggs were not

47. ## Chem

What pairs of ions produce similar colours in the flame test? Use your periodic table of elements to explain the reason for this. I think it's the different groups of elements, but I'm not sure.

48. ## physics

What angle might give you the greatest height? How could you test this with a simulation that does not go off the page? What angle might give you the greatest distance? How could you test this with a simulation that does not go off the page? What angle

49. ## geometry

Isosceles trapezoid JKLM has legs Jk and LM and bases KL and JM. Jk=8X+5 KL=4X+1 LM=10x+4 and MJ=18X+3, area of JKLM?

50. ## Geometry

find the area of a triangle whose vertices have coordinates:(5,5)(3,4)(8,3)

51. ## HSM/230

Post a 200- to 300-word response to the questions found at the end of the case study.

52. ## Math

Kelly was helping a friend with cleaning her bedroom. Kelly spent two hours and cleaned 80% of the room. what fraction of the room did Kelly help clean? How would I solve this - divide?

53. ## MATH

a rodeo performer spins a lasso in a circle perpendicular to the ground. the circle has a diameter of 118cm. she starts with the knot at the lowest point which is at 90 cm above the ground, she spins the lasso and .5 seconds later the knot is at the

54. ## Language Arts

4. What is the significance of the speech James Otis delivered at the last meeting of the Observers? (1 point) a)Many of the Observers considered Otis to be insane by that time. b)Otis delivered an inspirational speech about the costs of war and the

55. ## CHEMISTRY

Identify the conjugate base in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)? Identify the Bronsted-Lowry acid in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)

56. ## probability

The lifetimes of batteries are independent exponential random variables, each having parameter λ. A flashlight needs 4 batteries to work. If one has a flashlight and a stockpile of n batteries, what is the expected time that the flashlight can operate?

57. ## Math

Sally has 3 planting boxes . Each box is 4 feet wide and 8 feet long. How much space does she have altogether? Is it 3x4 + 3x8= 36 total feet?

58. ## math

LEGO R bricks are very common toys and have a structure that allows them to be placed on a rectangular grid. This makes them great for interesting questions about math. A 24 brick has two rows and four columns, making it have 8 total studs. But a 24 is

59. ## Physics

Repairing a spaceship CJ drops a hammer and it took .68 s to fall .90 m to the ground. What is the magnitude of the gravitational accerleration on mars

Find al points where tangent lines to: (x^2+y^2)^(3/2) = sqrt(x^2+y^2) + x is either horizontal or vertical using implicit differentiation.

61. ## Calculus

Find al points where tangent lines to: (x^2+y^2)^(3/2) = sqrt(x^2+y^2) + x is either horizontal or vertical.

62. ## Calculus

Find al points where tangent lines to: (x^2+y^2)^(3/2) = sqrt(x^2+y^2) + x is either horizontal or vertical.

63. ## Calculus

a hyperbola passing through (8,6) consists of all points whose distance from the origin is a constant more than its distance from the point (5,2). find the slope of the tangent line to the hyperbola at (8,6).

64. ## Calculus

The graph of the equation x2 − xy + y2 = 9 is an ellipse. Find the lines tangent to this curve at the two points where it intersects the x-axis. Show that these lines are parallel.

65. ## math

A hotel has rooms numbered 1 to 1000. One thousand visitors enter the hotel. 1. The first visitor switches on the light switches of every room. 2. The second visitor switches off the light switches of every other room, starting with room 2. 3. The third

66. ## math

Downtown Mathville is laid out as a square grid of 9 North-South streets and 9 East-West streets (See diagram). Your apartment is located at the Southwest corner of downtown Mathville. (See point T.) Your math classroom is located in a building that is 6

67. ## Math

A number and its absolute value are equal. If you subtract 2 from the number, the new number and its absolute value are not equal. What do you know about this number? What is a possible number that satisfies these conditions?

68. ## math

Consider an equilateral triangle with points located at each vertex and at each midpoint of a side. (See picture.) This problem uses the set of numbers {1, 2, 3, 4, 5, 6}. Place one number at each point. Call the sum of the three numbers along any one side

69. ## Science

-Describe the zero sum rule -True of False: The formula for the nitride ion is N^(-3) -True of False: The stock system shows the charge on the negative ion Answer this Question

70. ## math

1. Finding the Counterfeit Coin. You have 5 coins. You know that one of them is counterfeit and weighs less than the others. Suppose also that you have a balance scale. Is there a strategy for finding the counterfeit coin using the balance scale only

71. ## chemistry

A mixture of 3.00 g of silver and copper metals was dissolved in excess nitric acid. Resulting salts, silver(I) nitrate and copper(II) nitrate, were isolated and dissolved in enough water to make 0.100 L of a solution with a total concentration of the

72. ## math

Ruth buys 20 pencils for \$20. some cost \$4,some \$0.25 and some \$.50 each. at least one of each. How many of each price?

73. ## Chemistry

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138

74. ## Math

√(5y+1)-√(3y-5)=2, I need to solve algebraically, and state any restrictions on the values for the variables, which I can't remember how to do

75. ## MAth

4+sqrt(4+x^2)=x, I need to isolate the x variable in the radical equation, but I can't figure out how to do it. The answer is x=3/2

76. ## English

Im writing an essay in English about mental illnesses in teenagers and youth and i can't think of An appropriate title for it. I need some ideas of how to make on or some suggestions.

77. ## English

I asked a question earlier about creating a title for an article i wrote in English, the article being about school, and the pressure to achieve and the stress on students, and I can't figure out a good title, I've gotten some help from people and

78. ## English

I'm writing an article for my english exam prep, and my main topic that i went off of was the relationship between school, homework and stress on teenagers (the exam prep topic is relationships) in the article I talk about how homework is a large stress in

79. ## History

I still need help with what ethical dimensions are, I understand that it's 'the scope of right and wrong''the extreme of right and wrong' but I don't understand how to apply that to my question, which is what are the ethical dimensions of bill 94? Bill 94

80. ## history

What are ethical dimensions? I've searched google but I don't understand what it means.

81. ## History

What are the ethical dimensions of bill 94? (Bill in Quebec that banned face covering in any government funded building such as hospitals, government-subsidized high schools and universities) I mostly need help on the definition of ethical dimensions, I

82. ## Math

Kelly's scores on the first three tests in her physics class are 79, 84, and 68. Determine all scores on the fourth test that will yield an average test score of at least 80.

83. ## History

1)How did enlistment in the Canadian military change between first world war and second world war? What changed? I have a few points but I can't think of any more 2)how has the Canadian military changed from the second world war? Research the the inclusion

84. ## History.

Do you think the CRTC's restriction on media freedom were reasonable in the 1960's? DO you think they are reasonable now? Explain.

85. ## Chemistry

During an acid-base titration, 25 mL of NaOH 0.2 M were required to neutralize 20 mL of HCl. Calculate the pH of the solution for each: a) Before titration b) After adding 24.9 mL of NaOH c) At equivalence pt d) After adding 25. 1 mL of NaOH e) The pH of

86. ## physics

A 50kg girl sits at the top of a slide 6m long tilted at an angle of 30 degrees. if it takes her 3.3s to slide to the bottom and the coefficient of kinetic friction is 0.45, how fast will she be going at the bottom?

87. ## physics

A car has a flywheel ( a diks of R=0.2m and uniformly distributed mass M=100kg) that can convert 25% of the rotational kinetic energy into translational kinetic energy. The mass of the car is 1000kg ( including flywheel). Suppose the car is at rest, and

88. ## physics

Assume that the mass of a neutron star is 1.5 times that of the Sun and the radius of the neutron star is 10 km. Ignore effects of Special Relativity. What is the approximate speed at which an object released from far away (at zero speed) reaches the

89. ## PHYSICS URGENT HELP

a charges electric potential energy within an electric field is calculated as the product of the ____ of it's position times the magnitude of it's charge

90. ## Physics

ANY ANSWERS WILL HELP! THANKS! 1. Isolated points of electric charge are called ____. 4b. ____ was the American physicist who first measured this fundamental unit of charge. 5. This type of electrification occurs when the charging rod touches an

91. ## chemistry

determine the density in copper at 1305K. 1 mole of vacancies in copper is 104kJ. The answer I calculated this time is 8.4572*10^22. I am not sure if this correct. Thanks.

92. ## chemistry

DDD I may not be using the right formula. I am getting negative answers. Down to last chance.

93. ## Chemistry

I posted a question earlier today to determine the vacancy density in copper. The formation of 1 mole in Cu is 104kJ. Temperature is 1305K. My result is -2.19*10^-22. This does not look right to me. Any ideas. Thanks.

94. ## chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results

95. ## chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results

96. ## biology

Small gene big plasmid Question 2 Part E wrong. Question 2 Part F Determine the DNA sequence of PCR products. I do not understand how to handle this problem. On home works they were wrong and the solutions were confusing. Please give me a clue.

97. ## chemistry

N_v/N_s =Ae ^-change Hv/kT. What is the value of e^? Thanks.

98. ## Physics

6) The relationship between force and acceleration is given by Newton’s 2nd Law: Fnet = ma. In this case this becomes:          !@#\$%^&p – Ff = ma.

99. ## Chemistry

Determine the sulfate ion concentrate in a solution prepared by diluting 15.00 ml of 0.115 M Y2(so4)3 with 35 ml of water?