# Posts by Andres

Total # Posts: 83

1. ### Science

I need to make an acrostic poem for the word ECOSYSTEM and each letter has to be a phrase. I need help.
2. ### English

I also think that you need to analyze the writer's argument. Try to figure out several points about it and form everything in an essay. If you are out of ideas about it, you may address the professional writers from Primewritings site. They help is always relevant.
3. ### English 2

Use your imagination. Make up a room or a mall and try to describe everything you see on your mind. Try to write what the teacher would like, I mean many descriptive words would be a plus. If you still find it hard to accomplish, go to the writing service I like. Go to Prime ...

t=ln3/.05
5. ### Math

A house worth \$350,000 when purchased was worth \$335.000 after the first year and \$320,000 after the second year. If the economy does not pick up and this trend continues, what will be the value of the house after 6 years. A) determine if is arithmetic or geometric. Write the ...
6. ### Biology

the pores in their leaves?
7. ### Math

Find two consecutive even integers such that the sum of the larger and twice the smaller is 124.

b.12
9. ### physics

A 56-kg student runs at 4.2 m/s , grabs a hanging 10.0-m-long rope, and swings out over a lake (Figure 1) . He releases the rope when his velocity is zero. What is the angle θ when he releases the rope? What is the tension in the rope just before he releases it? What is ...
10. ### math

3/13 x 5/21 = _____ in its simplest form?
11. ### Math

Hello, I need to use matrices in order to solve this problem but I am having a hard time getting started with the problem. I just need a little push to nudge me in the right direction. Please help. Thank You. You have been hired as a consultant for Crazy Al’s Car Rentals...
12. ### Math

Hello, I need to use a matrix to solve this but am stumped on how to do it. All I need is a little nudge to push me in the right direction. Please help. Thank you You have been hired as a consultant for Crazy Al’s Car Rentals, a new car rental agency in the city of ...
13. ### Algebra

The difference of twice a number g and 10 is 24. Twelve more than a number b
14. ### Social studies

what reforms did Britain make to improve the workers lives
15. ### Physics

Pam has a mass of 35.5 kg and she is at rest on smooth, level, frictionless ice. Pam straps on a rocket pack. The rocket supplies a constant force for 29.2 m and Pam acquires a speed of 64.1 m/s. What is the magnitude of the force?
16. ### physics

Consider two masses m1 and m2, connected by a spring of spring constant k and an uncompressed length L. The masses are on a frictionless surface. Initially, m2 compresses the spring to L/2 length. At t=0 the system is released. Find the position of the center of mass of the ...
17. ### HISTORY

1. Discuss the influence of World War I and its aftermath on the arts. Explain what events or experiences inspired artists of all kinds to experiment with new approaches. Then describe the changes that came about in two of the following fields—painting, music, and ...
18. ### physics

An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that a person inside is stuck to the wall and does not slide down when the floor drops away. The acceleration of gravity is 9.8 m/s2 .Given g = 9.8 m/s2, the coefficient μ...
19. ### physics

Pete slides a crate up a ramp at an angle of 25◦ by exerting a 290 N force parallel to the ramp. The crate moves at a constant speed. The coefficient of friction is 0.28. How much work did Pete do when the crate was raised a vertical distance of 2.24 m? Answer in units of J
20. ### chemistry

you are welcome !!
21. ### chemistry

la energia balistica es igual al cambio de energia de transicion. qv= kz^2((1/nf^2)-(1/ni^2))) solo hay una emision del espectro, entonces la energia balistica solo es capaz de exictar del estado n=1 al estado n=2: qv= kz^2((1/2^2)-(1/1^2)))=3/4*kz^2 z=((1.641e-9*91.9)/(0.75*2...

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23. ### Chemistry

Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ...
24. ### Chemistry

Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ...
25. ### Chemistry

Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ...
26. ### Chemistry

Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ...
27. ### Chemistry

Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ...
28. ### Chemistry/Electrochem

A concentration cell is built based on the following half reaction: Zn(2+) + 2e(-) > Zn E(o)=-0.761 Using two pieces of zinc of electrodes (each 100.0 g), two Zn(2+) solutions, 0.101M and 0.427M (both exactly 1.00 L in volume), and all the other materials needed for a ...
29. ### Chemistry/Electrochem

Consider a cell at 299K: line notation Fe-Fe2+(1.39)--Cd2+(2.35)-Cd Given the overall standard reduction potential of the cell is -0.038. What will the concentration of the Cd2+ solution be when the cell is dead?
30. ### Chemistry/Electrochem

Consider a cell at 255 K: line notation Pb-Pb2+(1.27M)--Fe3+(2.29M)-Fe Given the standard reduction potentials calculate the cell potential after the reaction operated long enough for Fe3+ to have changed by 1.432M? I know that Fe3+ is the cathode which will decrease in ...
31. ### Physics

Heather and Matthew walk eastward with a speed of 0.78 m/s east. If it takes them 29 min to walk to the store, how far have they walked? Answer in units of km
32. ### Physics

Heather and Matthew walk eastward with a speed of 0.78 m/s east. If it takes them 29 min to walk to the store, how far have they walked? Answer in units of km
33. ### Physics

Heather and Matthew walk eastward with a speed of 0.78 m/s east. If it takes them 29 min to walk to the store, how far have they walked? Answer in units of km
34. ### English

As I am not mistaken you may find a sample on the similar topic at Primewriting site.I am their constant user and I recommend you try it too. I am confident they will accomplish all the points of the task.
35. ### Math

6x-3y = -6 and -5x + 7y = 41 I got stuck on this problem and my answers are outrageous so please help?
36. ### Math

6x-3y = -6 and -5x + 7y = 41
37. ### Calculus

The graphs of f(x) = x^3 and g(x) = 3X+5 have one intersection point. Determine the x-value for this intersection point using Newton's Method with an initial estimate of X1=2. You should use this method three times in order to obtain estimates X2, X3, and X4.
38. ### Chemistry

If an atom gains energy, is it in a more stable or unstable state?
39. ### Chemistry

You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
40. ### Chemistry

You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
41. ### Chemistry

You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.
42. ### Chemistry

4.0 L of hydrogen gas reacts with 2.0 L of nitrogen gas (at the same temperature and pressure), producing ammonia gas, NH3. Find the limiting reactant.
43. ### Chemistry

Calculate the sodium ion concentration when 50.0 mL of 2.0 M Na2CO3 is added to 100.0 mL of 3.0 M NaHCO3
44. ### Calc

A farmer wishes to enclose a rectangular pen with area 100 square feet next to a road. The fence along the road is to be reinforced and costs \$34 per foot. Fencing that coast \$16 per foot can be used for the other three sides. What dimensions for the pen will minimize the cost...
45. ### Calc

A farmer wishes to enclose a rectangular pen with area 100 square feet next to a road. The fence along the road is to be reinforced and costs \$34 per foot. Fencing that coast \$16 per foot can be used for the other three sides. What dimensions for the pen will minimize the cost...
46. ### calc

A farmer wishes to enclose a rectangular pen with area 100 square feet next to a road. The fence along the road is to be reinforced and costs \$34 per foot. Fencing that coast \$16 per foot can be used for the other three sides. What dimensions for the pen will minimize the cost...
47. ### Calculus

Determine the x-value for each inflection point on the graph of the following function. f(x)=3x^5-5x^4-80x^3+360x^2+1000x+850
48. ### Calculus

Determine the x-value for each inflection point on the graph of the following function. f(x)=3x^5-5x^4-80x^3+360x^2+1000x+850
49. ### Calc

so would the inflection point be x=-3 because that's where it goes from decreasing to increasing
50. ### Calc

Determine the x-value for each inflection point on the graph of the following function. f(x)=3x^5-5x^4-80x^3+360x^2+1000x+850
51. ### Calc

Suppose Y1 is a function of x which dy1/dx=3y1. Suppose y2 is a function of x which dy2/dx=8x+5. If the graphs of y1 and y2 have the same y-intercept and they intersect at x=2, then determine the value of the y-intercept.
52. ### Calc

an observer stands 200 m from the launch site of a hot-air balloon. the balloon rises vertically at a constant rate of 4 m/s. how fast is the angle of elevation increasing 30 s after the launch.
53. ### Calculus

an observer stands 200 m from the launch site of a hot-air balloon. the balloon rises vertically at a constant rate of 4 m/s. how fast is the angle of elevation increasing 30 s after the launch.
54. ### Calculus

an observer stands 200 m from the launch site of a hot-air balloon. the balloon rises vertically at a constant rate of 4 m/s. how fast is the angle of elevation increasing 30 s after the launch.
55. ### integrated math 2

I have a triangle with the base of 11 and all the sides look about the same but i don't know how to find out the height?
56. ### Chemistry

How many oxygen atoms are in 6.70 g of Al2(SO4)3? Express your answer using scientific notation with two decimal places.
57. ### Chemistry

How many oxygen atoms are in 6.70 g of Al2(SO4)3? Express your answer using scientific notation with two decimal places.
58. ### Chemistry

How many oxygen atoms are in 6.70 g of Al2(SO4)3? Express your answer using scientific notation with two decimal places.
59. ### Chemistry

How many oxygen atoms are in 6.70 g of Al2(SO4)3? Express your answer using scientific notation with two decimal places.

thanks
61. ### Trigonometry

determine real numbers a and b so that the expression 8sin^2(theta) + 2cos^2(theta) can be rewritten as asin^2(theta) + b I just need help in how to start it.
62. ### Trigonometry

determine real numbers a and b so that the expression 8sin^2(theta) + 2cos^2(theta) can be rewritten as (a)sin^2(theta) + b? If you can help me out on how to start it would be great.
63. ### History

1. Discuss the influence of World War I and its aftermath on the arts. Explain what events or experiences inspired artists of all kinds to experiment with new approaches. Then describe the changes that came about in two of the following fields—painting, music, and ...

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65. ### psychology

An example of ______________ would be if you argue that most behaviors are a product of your environment and your friend argues that behaviors are a result of heredity
66. ### physics

A picture hangs motionless on a wall as shown in the Figure. If the picture has a mass of 5.0 kg, what are the tension forces in the wires?

hggg\
68. ### physics

A rock is tossed straight up with a velocity of 34.0 m/s. When it returns, it falls into a hole 17.3 m deep. What is the rock's velocity as it hits the bottom of the hole? How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?
69. ### physics

Larry leaves home at 1:01 and runs at a constant speed to the lamppost. He reaches the lamppost at 1:10, immediately turns, and runs to the tree. Larry arrives at the tree at 1:26. What is Larry's average velocity during his trip from home to the lamppost, if the lamppost ...
70. ### physics

A speedboat starts from rest and accelerates at +1.99 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.515 m/s2. Following this, the boat accelerates at -1.44 m/s2 for 8.00 s. What is the velocity of the boat at t...
71. ### physics

A speedboat starts from rest and accelerates at +1.99 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.515 m/s2. Following this, the boat accelerates at -1.44 m/s2 for 8.00 s. What is the velocity of the boat at t...
72. ### e-mail begin

Are there any users of g-mail out there who would be willing to tell me what they think of this service from google? Besides that, I am thinking of setting up a new account with them. How would I do that? Anything you could tell that would facilitate me getting started with ...
73. ### history

when evaluating a web rescource wich terms refers to weather the information is realiable or error free? a. accuracy b. authority c. coverage d. objectivity
74. ### math

what is congruent?
75. ### Algebra 2

4Xsquared+7x+3 find the quadratic equation by factoring to solve. Show work
76. ### algebra 1

The owner of the Fancy Food Shoppe wants to mix cashews selling at \$8.00/kg and pecans selling at \$7.00/kg. How many kg of each kind of nut should be mixed to get 8 kg worth \$7.25/kg?
77. ### social studies

What are the governor's duties?

Why do cities and states need laws?

what is a product

CPU, memory,
81. ### math

i have been studying square roots and still don't understand it...i need more examples ..like how do i find the square root of 7....

40.12
83. ### Math

) In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also express the events ...