# hey guys, i follow you up to the point of intergrating the final line. How would I intergrate [x^-2.e^-x] dx thx

49,088 questions, page 148
1. ## Statistics

How high must a student score to place in the top 10% of all students taking the SAT? Scores on the SAT verbal test in recent years follow approximately the Normal with mean 504 and standard deviation 111. This is what I did. 1-.10=.9 Then I entered the

asked by Anonymous on March 19, 2013
2. ## History

How did New Imperialism impact the political development of Africa? African tribes began to follow the European lead and create empires of their own. Rival African tribes were sometimes placed in the same colony by European-drawn borders. Africans adopted

asked by Quinn on February 23, 2018
3. ## Physics

The melting point of substance X is -20 degrees Celsius and the boiling point is 90 degrees Celsius. How many Celsius degrees are there between the melting point and the boiling point? 20 degrees Celsius 70 degrees Celsius 90 degrees Celsius 110 degrees

asked by Anna on July 17, 2014
4. ## math

Is the relationship between the variables in the table direct variation, inverse variation, both, or neither? If it is a direct or inverse variation, write a function to follow it. X:2 5 20 40 Y:40 20 5 2 ANSWERS AVAILABLE TO CHOSE: A) NEITHER B) INVERSE

asked by josh on May 17, 2016
5. ## science

The specific heat capacity of the lava is 1600 J kg^-1. when all the erupted lava cools from the eruption temperature of 1050 degrees Celsius to 15 degrees celsius, the heat released is 2 x 10 ^15 J. calculate a value for the total mass of lava that

asked by missy on April 19, 2007
6. ## math

I'm not sure how to work this problem out. Find it very confusing and my answer keeps changing. Please help. From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite

asked by Denisha on August 22, 2011
7. ## Algebra I

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = –0.02x2 + 2.3x + 6, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of

asked by Sandra on January 25, 2015
8. ## stat

ok there was a question that my teacher told me i got wrong the question asked me to compute the mean which I did... then the question went on to tell me compute the mean with another observation equal to zero then the part that he drew the line through

asked by stat on September 6, 2009

Please remember these things: 1. This is a homework help website; please put your subject (math, science, English, or ??) in the subject line to make it faster for each teacher to find those questions in his/her areas. Even better is if you put your

asked by Writeacher on October 13, 2006
10. ## algebra

why the line x = 4 is a

asked by Anonymous on December 13, 2008
11. ## algebra

P (C) if P(C)= P(C) this P(C)has i line above it

asked by apryl on August 27, 2011
12. ## slope

What does the line y = 3x - 7 look like?

asked by Anonymous on April 2, 2014
13. ## geometry

a line that contains ab and cb

asked by ssss on August 25, 2013
14. ## math

is anyone on-line.

asked by Sue on January 24, 2008
15. ## math

what does a line above pq mean

asked by melinda on September 3, 2009
16. ## Math

is S(93,83) on the line containing P(-3,-1) and Q(5,6)? why?

asked by Angie on March 25, 2009
17. ## Geometry

How do you name a line?

asked by Bryce on August 28, 2012

1. -4 -5(x+8) 2. 3x + 4(x-6)-3(x-7) 3. X+8 (with a line under it) -3 5. -5p>-30

asked by Bandgeek15 on December 7, 2015
19. ## Math

What is another name for the line y = 0?

asked by Mellis on September 5, 2017
20. ## Mathematics

MN bisects PQ at point R. Which of the following is true about point R? A. R is the midpoint of MN B. R is the midpoint of PQ ****C. R is both the midpoint of PQ and the midpoint of MN***** D. R is the new endpoint of PQ

asked by Jarzzapan on March 16, 2017
21. ## Physics

17. Potential due to a point charge: What is the electric potential 17.0 cm from a 3.50 μC point charge?

asked by Lex on April 25, 2013
22. ## Chemistry

Why does I2 have a higher boiling point than F2? And why does NH3 have a higher boiling point than PH3?

asked by Jeremy on December 4, 2012
23. ## Physics

One very long wire carries a current of 30A to the left along the x-axis.A second very long wire carries a current of 50A to the right along the line(y=0.280m,z=0) A)Where in the plane of the two wires is the total magnetic field equal to zero? B)A

asked by Sandhu on November 11, 2009
24. ## chemistry

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

asked by Anonymous on December 5, 2010
25. ## chem

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

asked by Anonymous on December 6, 2010
26. ## chem

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

asked by Anonymous on December 8, 2010
27. ## chem

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

asked by Anonymous on December 5, 2010
28. ## physics

A soccer player kicks a ball straight up into the air at 6m.s per second.Ignore air friction. 1.What is the height of the ball at its highest point 2.What is the ball's acceleration at its highest point 3.Calculate the maximum height reached by the ball

asked by Samantha on February 11, 2014
29. ## college

Assume that the student has a cup with 13 writing implements: 7 pencils, 4 ball point pens, and 2 felt-tip pens. In how many ways can the student select 9 writing implements if no more than one ball point pen is selected?

asked by finite on September 21, 2010
30. ## physics

the positive point charges + q are placed at three corners of a square , and a negative point charge -Q is placed at the fourth , corner. the side of the square is L. calculate the net electric force that positive charges exert on the negative charge

asked by Ahmed on March 19, 2015
31. ## physics

Assuming that it takes 0.10 s for the driver to react before applying the brakes, what is the stopping distance (the distance from the point where the driver first sees the need to stop to the point where the car comes to a stop) for a car traveling at 25

asked by Laura on February 13, 2012
32. ## physics

A soccer player kicks a ball straight up into the air at 6m.s per second.Ignore air friction. 1.What is the height of the ball at its highest point 2.What ie the ball's acceleration at its highest point 3.Calculate the maximum height reached by the ball

asked by Samantha on February 11, 2014
33. ## physics

A boy and girl are balanced on a "massless" seesaw. The boy has a mass of 75 kg and the girl a mass of 50kg. The seesaw is 6 meters in lenght with the pivot point between them...What are the distances each child must sit relative to the pivot point?

asked by Joe on November 14, 2015
34. ## chemistry

When 0.500 g of an unknown compound was dissolved in 15.0 g benzene, the freezing point depression was determined to be 0.320 C. The molar mass of the unknown compound is ____ (The freezing point depression constant for benzene is 5.12 C kg/mol. )

asked by James on April 3, 2008
35. ## Linear algebra

If →u and →v are the vectors below, find the vector →w whose tail is at the point halfway from the tip of →v to the tip of →v−→u and whose head is at the point halfway from the tip of →u to the tip of →u+→v. Assume all vectors are in

asked by sal on September 22, 2018
36. ## Vectors-another angle confusion

On an x-y grid, label them N-S, E-W, draw a line from the origin to the right and label it 425 (you are going East) From the end of that line draw a vertical line upwards of 40 (you are going North) Use an approximate scale, realizing that 425 is just

asked by Reiny on April 20, 2007
37. ## Algebra 1

William, a logistician, needs to route a freight train that is 20 feet at its tallest point and 10 feet at its widest point within 3 days. The most direct path includes a single-track tunnel that needs 24 hour notice prior to use. If the tunnel is roughly

asked by Taylor on September 6, 2013

19. Identify the statement that is a verifiable fact. (1 point) Kids need to avoid excessive time in front of a computer. Laptop computers outsell desktop computers in retail sales. Most computer applications are designed for learning purposes. The elderly

asked by kate on May 21, 2015
39. ## Physics

A battery with voltage drop of 120V is connected in a ciruit containing both series and parallel. Moving in a clockwise direction. R1= 3 ohms. Suddenly there is a connection of point A to point B. In between these two points is a parallel circuit with R2=

asked by Andrea on March 26, 2008
40. ## science --- pls check my work!!!

hi, pls check my work asap! 1. A ___ has a definite shape and a definite volume. (1 point) solid*** liquid gas molecule 2. Why is a gas able to flow? (1 point) Its particles have melted and can move around.Its particles have high viscosity and can move

asked by TTR+S<3 on February 8, 2014
41. ## Chemistry

A buffer containing 1.2169 M of acid, HA, and 0.1431 M of its conjugate base, A-, has a pH of 3.96. What is the pH after 0.0017 mol NaOH is added to 0.5000 L of this solution? I can't figure this out for the life of me, i'm sure its just some simple

asked by Rafael on April 2, 2007
42. ## physics

the momentum of 900kg car initially moving north at 10m/s increases by 10,800. calculate the final velocity of the car.

asked by gem on December 4, 2011
43. ## math

There is a 60% chance that a final year student would throw a party before leaving school, taking every 50 student from a total of 150. What is the mean value and variance

asked by rightbwoy on May 1, 2018
44. ## Lan

Spend a few moments reviewing the revising strategies you have learned. Apply what you have learned! Write the final draft of your autobiographical essay.

asked by Missy on September 22, 2016
45. ## Algebra

Find the final amount of money in an account if \$2,600 is deposited at 4% interest compounded annually and the money is left for 7 years.

asked by Pek on May 5, 2018
46. ## Physics ~ A 2.0-kg ball is

A 2.0-kg ball is travelling east at 8.0 m/s when it has a perfectly elastic head-on collision with a 3.0-kg ball traveling west at 10.0 m/s. What are the final velocities of the two balls?

asked by Booker Perry on October 29, 2012
47. ## Physics

2)Identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 1282.0 nm. Enter the initial state first

asked by Sandhya on April 13, 2008
48. ## math

you purchase a bicycle with a retail (pre-tax) price of \$760. the local sales tax rate is 7.6%. what is the final cost

asked by chels on January 28, 2016
49. ## math

a drug is supplied as a 20 mg/ml solution in a 50 ml vial. you need to make 15 ml of a 10 mg/ml solution. how much concentrate and how much diluent are needed to obtain the desired final volume?

asked by kate on July 9, 2014
50. ## Physics

Two carts with masses of 4.24 kg and 3.44 kg move toward each other on a frictionless track with speeds of 4.90 m/s and 3.51 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

asked by Emily on December 8, 2011
51. ## cultural diversity

I actually am just looking for any ideas on multicultural issues in education, i have some ideas but have to make a list now and im assuming later on maybe pick one for a final project or something. any help would be greatly appriciated

asked by Anonymous on June 12, 2011
52. ## chemistry

A 43 kg sample of water absorbs 302 kJ of heat. If the water was initially at 29.8 degree celsius, what is its final temperature? sorry about before i forgot the units.

asked by Mari on February 5, 2010
53. ## Math

Jason and Coretta Bradley got a \$206,000, 20-year mortgage loan at 5.35%. Find the amount of the final payment on this mortgage.

asked by Byebye on May 10, 2018
54. ## physics

alculate the final speed of a 1500 kg roller coaster if it has an initial speed of 16 m/s but reduces its elevation by 8.6 m by coasting down a frictionless incline.

asked by grey on June 4, 2014
55. ## math

Frank opened a savings account with \$700 at 4.5 percent interest, compounded quarterly, and kept it in the account for two years. How much was the final amount?

asked by km on January 25, 2012
56. ## physics

A 500g ball moving at 72 km/h is stopped by a player in 2 sec calculate a) initial and final momentum b) force applied by the player

asked by natasha on August 15, 2016
57. ## Physics

If 0.045 kg of ice at 0 C is added to 0.390 kg of water at 34 C in a 0.150 kg aluminum calorimeter cup, what is the final temperature of the water? T = degree C

asked by Anonymous on May 7, 2011
58. ## Physics

Two carts with masses of 4.66 kg and 3.00 kg move toward each other on a frictionless track with speeds of 4.77 m/s and 3.33 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

asked by Anonymous on December 12, 2014

An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.

asked by Taylor on September 21, 2010
60. ## Math

Find 2 solutions to the equation 3x+5y=10. Write the solutions as ordered pairs. This is on my math study guide for our final and she already took up our text books. please help me!

asked by Gaby on May 31, 2009
61. ## English

Just to say Thank YOU everyone for the advice and help I have received. I have turned in my final exam. It was 9 pages and yes, I had to ask for advice and help, but I have really learned a lot. I will let ya'll know my outcome. It is nice to learn

asked by Karen on November 19, 2014
62. ## physics

A car exciting the highway moving at 27 m/s slows down at the rate of 3.5 m/s^2 to a final velocity of 18 m/s. Calculate the distance the car travels while braking?

asked by michelle on September 26, 2013
63. ## physics

Two carts with masses of 4.00 kg and 3.40 kg move toward each other on a frictionless track with speeds of 4.70 m/s and 3.56 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

asked by Brandon on November 8, 2012
64. ## Written Analysis

I need help with my project. I have to write 4-6 paragraphs summarizing three solution ideas on Discrimination. I also have to develop criteria or standard that can be used to evaluate the final solution.

asked by keri on November 11, 2011
65. ## intro to chem

A 45kg sample of water absorbs 367kJ of heat. If the water was initially 24.8ºC, what is final temperature? Please explain steps. Thanks

asked by Carol on June 21, 2014
66. ## physics

a bus is moving on a straight highway at 12m/s. as it approaches the total gate, it decelerates at 2.5 m/s2 in 5 seconds. what is the final velocity of the bus?

asked by ricajane on November 24, 2011
67. ## Math Help Plaese!!!!!!

Calculate the final price you would pay to buy jacket that originally sells for \$65, but is discounted by 40%; you also have to pay 5% sales tax. Explain.

asked by Bell on February 11, 2013
68. ## Physics

A 70 kg person is riding on a frictionless skateboard at 5 m/s. A friend facing him throws a 5kg ball toward him at 20 m/s. What is his final speed after catch the ball?

asked by vernon on January 5, 2015
69. ## crt 205

Hello, I really need help with this subject, I've been trying the eight weeks hard in this subject but I still get 64 in my score the only thinbg I have for my me to put my grades up is my final project but I have no clue, I do not understand, any Ideas?

asked by jessica on December 22, 2008
70. ## chemistry

If 180.0 mL of 0.270 M NaOH are mixed with 230.0 mL of 0.500 M NaOH, what is the molarity of the final solution? Assume the volumes are additive.

71. ## Physics

Starting from rest, a ball of mass 4 kg experiences a constant force of 8 N. What is the final kinetic energy (in J) of the ball after it has traveled a distance of 1 m?

asked by Fallon on April 29, 2010
72. ## ipc

A ball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second2. What is the final velocity of the ball after 6.0 seconds?

asked by coop on November 17, 2015
73. ## TRIGONOMETRY

I don't understand how to convert -3-4i to polar coordinates. I need to know how so I am ready for my trig final next year. Can someone please show me step by step how to solve this? Thanks

asked by Kate on May 17, 2013
74. ## Math (Algebraic Manipulation) Help me please

An operation produces A−1/A from a fraction A= m/n, where m ≠ n and m ≠ 0. If the initial value of A is 24/47 and the operation is repeated 2012 times, the final output is a/b, where a and b are coprime positive integers. What is a+b?

asked by Tom on May 13, 2013
75. ## physical science

. You make the following measurements of an object: 22kg and 42m3. What would the object’s density be? Show your work for credit and include final units.

asked by bee on September 27, 2015
76. ## Math (Algebraic Manipulation)

An operation produces A−1/A from a fraction A= m/n, where m ≠ n and m ≠ 0. If the initial value of A is 24/47 and the operation is repeated 2012 times, the final output is a/b, where a and b are coprime positive integers. What is a+b?

asked by Tom on May 12, 2013
77. ## Physics

Two carts with masses of 4.82 kg and 2.72 kg move toward each other on a frictionless track with speeds of 5.03 m/s and 3.52 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

asked by Daijha on January 9, 2014
78. ## Chemistry

How many stereoisomers are there for 1,2-dichlorocyclopentane? The answer options are 1,2,3 & 4. I think it is 4 because there is one cis & one trans isomer,so when using the 2^n formula,the final answer is 2^2 =4.Is my approach correct? Need ur help

asked by Meenaakshi on April 8, 2012
79. ## physics

Two carts with masses of 4.00 kg and 3.24 kg move toward each other on a frictionless track with speeds of 4.90 m/s and 3.35 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

asked by Anonymous on May 10, 2013
80. ## Physics

A water balloon is dropped from the top of a 65.0m tall building. What is its final velocity just before it hits the ground? How long does it take to hit the ground?

asked by Nurry on November 8, 2018
81. ## Chemistry 101

25 ml tartaric solution is tritrated with 31 ml ammonium equation rearranged for normality of ammonium: starting with N1V1=N2V2 N1= V1= v2= final answer N2=

asked by Renee on October 15, 2012
82. ## Physics

a driver of a car traveling at 17.3 m/s applies the brakes causing a uniform deceleration of 2.8m/s^2. How long does it take the car to accelerate to a final speed of 13.5 m/s?

asked by Tytiana on September 20, 2015
83. ## trigonometry

Write the equation of the curve in its final position: the graph of y = tan (x) is shifted by (pi/6) units to the right, stretched by a factor of 3, then translated 8 units up.

asked by chelsea on March 27, 2011
84. ## TRIGONOMETRY

Can someone please give me a step by step answer on how to find the complex cube roots of 8(cos(4π/5)+isin(4π/5))? I need to know how to do this for my trig final next week.

asked by Kate on May 17, 2013
85. ## Chemistry

A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at 25 °C. Assuming no heat is lost to the atmosphere, what is the final temperature of the sand?

asked by John on March 7, 2013
86. ## Chemistry

A 1.00 kg gold bar at 1010 K is dropped into 0.750 kg of sand at 25 °C. Assuming no heat is lost to the atmosphere, what is the final temperature of the sand?

asked by John on March 7, 2013
87. ## Physics

An aluminum calorimeter has a mass of 60g and an initial temperature of 25oC. What is the final temperature attained when 86.8g of water at 90oC is poured into it?

asked by Mike on March 25, 2014
88. ## Chemistry

A sample of oxygen that occupies 1.00 x 10^6 mL at 575 mm Hg is subjected to a pressure of 1.20 atm. What will the final volume of the sample be if the temperature is held constant?

asked by Sara on November 2, 2014

Two carts with masses of 4.20 kg and 2.44 kg move toward each other on a frictionless track with speeds of 4.92 m/s and 3.87 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

asked by Noah on October 28, 2014
90. ## Math

(a) Find the present value of \$ 4600 per year flowing uniformly over a 10 -year period if it earns 5.3 % interest compounded continuously. (b) What is its final value?

asked by Irina on May 10, 2015

The fifth and final step in testing a hypothesis is taking a sample and, based on the decision rule, deciding if the null hypothesis should be rejected.

asked by Anonymous on October 28, 2008
92. ## Science

Starting from rest an airplane moves with a constant acceleration of 2m/s for 30 seconds before it takes off A. How far does it travel down the runway before it takes off ? B. What's it's final velocity ?

asked by Anonymous on January 29, 2017
93. ## physics

The pressure of a given mass of gas changes from 300Nm^-2 to 120Nm^-2 while the temperature drops from 127°c to -73°c. The ratio of the final volume to the initial volume is?

asked by BIZHATOCOTO on April 6, 2019
94. ## Help with one limit

I'm asked to find the limit as n approaches infinity of : [(2^(n) +1]/ [2^(n+1)]. The review we were given has [1+ 2^(-n)] / 2 as the next step, but I'm not quite sure how to make that leap myself. The final answer is 1/2. How do you solve this limit?

asked by Anonymous on April 30, 2014
95. ## science

) A body with an initial velocity of 5ms‾¹ accelerate uniformly at the rate of 16 cm s‾² over a distance of 200 m. Calculate: (i) the acceleration in m s‾² (ii) its final velocity in m s‾¹

asked by pia on July 30, 2013
96. ## Chemistry

If 17.0 mL of 0.590 M CaCl2 are mixed with 46.6 mL of 0.480 M CaCl2, calculate the molarity of each ion in the final solution? Assume the volumes are additive.

asked by Pob on April 3, 2011
97. ## physics

A stone is dropped off a cliff, the last 1.5 seconds before it reaches the ground it travels 30 meters. Find the height from which it dropped & final velocity

asked by robert on October 7, 2013
98. ## Chemistry

What is the final concentration of a solution if 15-mL of a 2.4-M solution was diluted to 100-mL and this process was repeated two more times? Please help me how to work out the problem. I am not just looking for an answer. I really want to learn.

asked by Evin on April 24, 2016
99. ## physics

A 3.0-kg body is initially moving northward at 15 m/s. Then a force of 15 N, toward the east, acts on it for 4.0 s. (a) At the end of the 4.0 s, what is the body’s final velocity? (b) What is the change in momentum during the 4.0 s?

asked by thomas on October 26, 2010
100. ## Physics

An automobile with an initial speed of 6.12m/s accelerates uniformly at the rate of 4.4 m/s^2.Find the final speed of the car after 4.6 s. Answer in units of m/s

asked by Roseanna on September 17, 2014