# 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 143
1. ## Chemistry

assuiming that the calorimeter contains 5.00 * 10^2 g of water and the intial temperature is 30.0 degreddc, what will the final temperature be?

asked by priya on October 19, 2008
2. ## Human services

I need assistance in revising a rouph draft for my final. How would I get in touch with that type of assistance?

asked by April on July 10, 2009
3. ## chemistry

When Zn(OH)2 was added to 1.00 of a basic solution, 1.24×10−2 of the solid dissolved. What is the concentration of in the final solution?

asked by Anonymous on March 28, 2012
4. ## Math

A 1.00kg piece of aluminum at 90.0c in placed in 4.00 liters (4.00kg) of water at 25.0c. What is the final temperature(Tf)

asked by Dave on November 8, 2012
5. ## Science: Chem

How many milliliters of 0.10 M HCl must be added to 52.0 mL of 0.40 M HCl to give a final solution that has a molarity of 0.25 M?

asked by Lach on November 1, 2011
6. ## Chemistry Lab

If 12.50 mL of 0.324 M HCl is diluted to 250.00 mL, what is the concentration of HCl in the final solution?

asked by Thao on May 10, 2011
7. ## Bus 101

Can someone help me to compare answer for final exams introduction to Business - These are my answers Here are my answers... 1.c 2.a 3.a 4.d 5.c 6.b 7.a 8.b 9.c 10.b 11.a 12.a 13.c 14.d 15.a 16.a 17.a 18.8 19.c 20.b 21.a 22.a 23.d 24.a 25.b 26.d 27.a 28.b

asked by Devon on April 7, 2015
8. ## pharmacy math

if 500 ml of a 15% solution is diluted to 1500 ml, how would you label the final strength of the solution?

asked by cleondra on December 7, 2012
9. ## Math

Find the multiplicative inverse of the number. 1/2 (fraction) The inverse would be 2/1, which would be 2 as the final answer.

asked by Anonymous on October 22, 2009
10. ## Physics

A particle of mass 2 kg has an initial velocity of (4.5i + 3.5j) m/s. It is acted on by a force (5i -2j) N for 2 s. What is its final velocity?

asked by Sabrina on October 6, 2014
11. ## college

A solution was diluted by a factor of 2 and then again using a 1 to 3 dilution. What is the dilution of concentrate in the final sample

asked by alyemi on May 26, 2009
12. ## kv

a man travel 3 km north ,3 km east again 1 km north find the final displacement

asked by khushii on September 24, 2015
13. ## Physics

A particle's initial velocity is −24.0 m/s. Its final velocity, 3.10 seconds later, is −14.0 m/s. What was its average acceleration?

14. ## science

A gas at atmospheric pressure is compressed isothermally to one third of its volume. What is final pressure?

asked by Anjali on January 17, 2016
15. ## chemistry

if 8.00kJ of heat added to 200. g of water at 20.0 C what is final temperature of water?

asked by Brianna on September 23, 2010
16. ## Chemistry

You mix 50.0g of cold water at 0.00°C with 75.0g of hot water at 85.00°C. What is the final temperature of the mixture?

asked by J.T on December 17, 2017
17. ## CHEMISTRY

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number

asked by Alexander on November 9, 2011
18. ## Chemistry

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number

asked by Alex on November 9, 2011
19. ## Math

The coordinates A(0, 0), B(0, 3), C(4, 3) and D(4, 0) are graphed and connected together. What 3-dimensional shape will be created when this shape is rotated about the y-axis? Provide an explanation and proof for your answer to receive full credit. My

asked by kat on June 9, 2017
20. ## algebra

Find the domain and range of the function. 1. f(x)= x^2-x I got: Domain= All Real Numbers Range= All Real Numbers > -1 (with a line under the greater than sign) 2. f(x)= 1-x^2 I got: Domain= All Real Numbers Range= All Real Numbers < 1 (with a line under

asked by Anonymous on November 9, 2006
21. ## unsolved mysteries astrophysics

Q3.2 COLLAPSE TIMESCALE (5 points possible) Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different cosmology. It seems that in this distant universe, all galaxies have the same luminosity,

asked by JuanPro on April 15, 2014
22. ## geometry

In triangle abc, point B is on segment ab, and point E is on segment bc such that segment de is parallel to segment ac if db=2, da=7, de=3, what is the length of segment ac?

asked by jenny on June 12, 2010
23. ## Geometry

What is the distance between point P(-2, 1, 3) and point Q(-1, 4, -2) to the nearest tenth? 35.1 units 9.3 units 18.4 units 5.9 units My answer: 18.4 units

asked by Nicole on January 29, 2016
24. ## math

Let h(x) = 3 x2 + 2 x + 1. Let g(x) = 3√{x} + 3. (Note: If there is a nonmathematical symbol in the preceding expression, then your browser doesn't have the math symbol font. Please follow the instructions on the Tools page in Oncourse to install the

asked by Cara on September 17, 2010
25. ## social studies

plzz HELP me with my social studies i need to get this one done within 10 min plzz 1. Which word most closely means civility? (1 point) respect discipline patriotism liberty 2. Civic-mindedness most encourages people to (1 point) speak their minds about

asked by peace on January 2, 2013
26. ## ENGLISH

1.what are the behavior of students towards school rules and regulation ? 2.why do the students need to follow the school rules and regulations? 3.how does it affects to the behavior of the students

asked by PAT on November 26, 2016
27. ## Physics

How can I find the distance? Mountain pull. A large mountain can slightly affect the direction of “down” as determined by a plumb line. Assume that we can model a mountain as a sphere of radius R = 2.00 km and density (mass per unit volume) 2.6 × 10^3

asked by Austin on November 2, 2017
28. ## math

Air expands from 2 m3 to 3 m3 at constant pressure. If the initial temperature is 60 degrees Celsius, what is the final temperature?

asked by Anonymous on June 9, 2016
29. ## Chemistry

It took 400 calories of heat to raise 50 mL of water from 20 degrees Celsius to its final temperature. What was that temperature?

asked by Shambrey on March 14, 2011
30. ## Chemistry

If 689000 J of energy are added to 4.00 L of water at 284 K, what will the ﬁnal temperature of the water be? Answer in units of K

asked by Danny on March 19, 2014
31. ## Grammar

The student......for the final exam. was studying /studied hardy did not studied Would had study. What is the rieght tense ?

asked by Kaba on September 30, 2016
32. ## science, physics

Calculate the final temperature. Two kg ice at zerodegree celsius is mixed with 8 kg of water at 20 degree celsius.

asked by nupur on September 1, 2014
33. ## physics

if a wire of length 12cm it stress up to 25m what will be the final resistance .it initial resistance is 16ohm?

asked by sid on September 13, 2012
34. ## Physics

in an impulse/ change in momentum problem where mv(final)-mv(initial)=Ft if the initial velocity is zero can i cancel out the masses?

asked by Emily on April 10, 2012
35. ## Math 6th Grade, Help me!

If the original bill is \$15.50, what will be the final bill after paying a 15% tip? Round to the nearest cent. A. \$2.33 B. \$17.83 C. \$30.50 D. \$232.50

asked by NapkinNate on March 1, 2018
36. ## Chemistry

A 4.30 g nugget of pure gold absorbed 298 J of heat. The initial temperature was 22.0°C. What was the final temperature? °C

asked by Karla on February 25, 2016
37. ## Chemistry-nudge the

A 4.30 g nugget of pure gold absorbed 298 J of heat. The initial temperature was 22.0°C. What was the final temperature? °C

asked by Karla on February 25, 2016
38. ## sjrkps

A body initially at rest accelerates at the rate of 0.8m/s2 for 20 seconds.Find the final velocity of the body.

asked by mehek on July 12, 2015
39. ## math

To obtain a final average of 80 % in a certain subject, what grade must a student earn in a test after having an average of 77.5 % in four examinations ?

asked by vincent on August 3, 2013
40. ## Vocab.

Okay, so I have to unscrammble these letters to get the final message: w u n o r e v o o s t s r b i o i a e u c o u s h r c r d e d _ _ _'_ _ J_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 20 W_ _ _ _! I'm pretty sure the first two words are

asked by Alyssa on November 7, 2009
41. ## Chemistry

If you take a 10.0-{mL} portion of the stock solution and dilute it to a total volume of 0.700 L, what will be the concentration of the final solution?

asked by Veronica on October 7, 2010
42. ## precalc

Suppose the value of quantity A changes from a starting value of x to a final value of y. Write an expression using x and y that computes the resulting change of quantity A.

asked by BeeBee on September 6, 2013
43. ## Basic Math Pharmaceutical calculations

Drysol contains 6g of aluminum chloride hexahydrate in 42ml of an alcohol base. What is the final strength of Drysol?

asked by Shanna on February 19, 2013
44. ## chemistry

A 4.30 g nugget of pure gold absorbed 293 J of heat. The initial temperature was 23.0°C. What was the final temperature?

asked by brett on May 10, 2010
45. ## Chemistry Help

If 230.0 mL of 0.100 M H2SO4 are mixed with 280.0 mL of 0.300 M H2SO4, what is the molarity of the final solution? in M

asked by MBH on October 3, 2011
46. ## chemistry

A 46kg sample of water absorbs 4.00×102kJ of heat. If the water was initially at 29.7 ∘ C , what is its final temperature?

asked by Nehemie on June 23, 2013
47. ## Chemistry

A 5.0×101kg sample of water absorbs 3.10×102kJ of heat. If the water was initially at 21.3 ∘ C, what is its final temperature?

asked by Anonymous on October 13, 2013
48. ## chem

What mass of copper(II) nitrate would be produced from the complete reaction of 25.1 g of copper my final answer is 74.08 is this correct

asked by vanessa on September 15, 2010
49. ## Physisc

A 12 kg mass initially moving at 4 m/s is acted upon by a 120 N constant force. What is the final speed of the mass?

asked by Steve on January 14, 2017
50. ## biochem

I have 0.500ml of 3M ethanol and then I take 0.250ml of it and put it to 0.250ml of 0.06M phosphate buffer, what is the final concentration?

asked by trouble on March 27, 2012
51. ## physics

Suppose 560.0 J of heat is added to a 111-g piece of aluminum at 23.0° C. What is the final temperature of the aluminum?

asked by aok on December 7, 2010
52. ## Algebra

Factor by removing the common factor with the lesser exponent 2x(x-5)^-3 -4x^2(x-5)^-4 I don't really know how to do this. The final answer I got is: 2x(2x^2-10x+1) -------------- (x-5)^4

asked by Stephen on August 21, 2015
53. ## AE

I seriously do not know what to do. My final is due tomorrow and it has to be 1700 words and I am only at 462. I am already failing the class. What happens if I fail the class, which I already know I am going to.

asked by scooby91320002 on August 24, 2008
54. ## math

. Four tablespoons of extract are mixed with 240 ml of oral suspension base. What is the final concentration of the suspension?

asked by KILL on July 7, 2014
55. ## Quantatative Analysis

"what volume of .50 m h2so4 must be added to 65 ml of .20 m h2so4 to give a final solution of .35 M? assume volumes are additive"

asked by Stumped on October 29, 2011
56. ## Chemistry

If you weigh out 2.083 g Fe(NO3)3·9H2O, what is the final concentration of the dilute Fe(NO3)3 solution that you make?

asked by Sarah on June 27, 2013
57. ## chemistry

exactly 20 mL of .0520M Pb(NO3)2 is diluted to a final volume of 100 mL. What is the molar concentration of the diluted solution?

asked by chelsea on June 13, 2011
58. ## Chemistry

A 38.9 g piece of iron at 84.6oC is placed in a beaker containing 179.7 g of 20.7oC water. What is the final temperature (oC)of the water?

asked by Mike on July 14, 2014
59. ## physics

an automobile with an initial speed of 43 cm/s (accelerates uniformly at the rate of 3m/s^2). what is the final speed and the displacement after 5 sec?

asked by nicole on September 21, 2014
60. ## intergrated science

A car traveling at a velocity of 24m/s is accelerated uniformly at a rate of 2m/s^2 for 8 seconds. What is the final velocity?

asked by Cora Stallins on November 11, 2016
61. ## laboratory math

If 0.1 ml of serum, 5ml of reagent, and 4.9 mL of distilled water are mixed together what is the dilution of the serum in the final solution?

asked by v l on October 19, 2007
62. ## physics

a skateboarder starting from rest accelerates down a ramp at 2m/s squared for 3sec. what is the final speed of the skateboarder?

asked by danielle on October 25, 2012
63. ## Chemistry

A 5.0×101 kg sample of water absorbs 333 kJ of heat. If the water was initially at 23.1 ∘C, what is its final temperature?

asked by Amy on September 14, 2018
64. ## Algebra II

Use synthetic substitution to find f(-3) for f(x) = 2x^3 - 6x^2 - 5x + 7. _3|2 -6 -5 7 6 36 93 ______________ 2 0 31|100 then I used direct substitution and just plugged -3 in for x and the final answer is f(-3) = 86

asked by Jon on March 3, 2008
65. ## Chemistry

How to solve: What is the final concentration of sucrose if 300.mL of a 1.2M solution of sucrose is diluted to a volume of 0.60L ?

asked by Anonymous on November 2, 2012
66. ## Chemistry

If 3.50 mol of A is mixed with 0.750 mol of B and the final pressure of the mixture is 3.25 atm, what are the partial pressures of A and B

asked by Briana on June 8, 2014
67. ## chemistry

If you dilute 10.0mL of the stock solution to a final volume of 0.350L , what will be the concentration of the diluted solution?

asked by lissette on September 30, 2013
68. ## Chem

If you take a 15.0-mL portion of the stock solution and dilute it to a total volume of 0.700L , what will be the concentration of the final solution?

asked by meaghan on September 30, 2013
69. ## chem

A 5.0×101 kg sample of water absorbs 312 kJ of heat.If the water was initially at 20.1C, what is its final temperature?

asked by inny on October 20, 2010
70. ## Chemistry

A 5.0×101 kg sample of water absorbs 324 kJ of heat. If the water was initially at 22.2 ∘C, what is its final temperature?

asked by Carlos on February 20, 2017
71. ## physics

If the mass of an object was 0.500 kg and it started from rest, then the object's final velocity at the end of 0.86 seconds is ?

asked by sarah on February 24, 2012
72. ## Chemistry

A 45-kg sample of water absorbs 345 kj of heat. If the water was initially at 22.1 degrees c what is its final temperature

asked by Wyatt on February 16, 2011
73. ## Chemistry

4.54 g of hydrazoic acid ( HN3 ) is added to water to make a final solution of 504 ml. What is the pH of the solution ? Use Ka = 1.90 × 10−5

asked by Chelsea on March 8, 2010
74. ## vocab

improving vocabulary skills textbook chapter 7 sentence check 2 and final check answers

asked by Anonymous on October 19, 2015
75. ## physics

A body travels with uniform acceleration.Its final velocity,v=180-7x,where x is the displacement.Then find its acceleration.

asked by go ramesh on September 30, 2014
76. ## science

A 6.4-N object is traveling at 9.9 m/s. It strikes an 2.1-N object, which is stationary. The two objects stick together. Their common final speed is:

77. ## How to calculate marks to pass with the exam

My friend has currently 62.4% and the final exam is worth 30%. She's wondering how much she should get on the exam to at least pass or boost it up. Please show the math :o

asked by Anonymous on January 23, 2011
78. ## Physics

two charges of 40 microc and -20 micro c are placed at a certain distance apart. they are touched and kept at the same distance.the ratio of their initial to the final force between them is

asked by Xyz on November 9, 2016
79. ## science

What would be the final temperature of a mixture of 50 g of 20 0C water and 50 g of 40 0C water. I'm really not sure how to do this do I need to convert 20 Celsius to Fahrenheit to start? what are the steps for this?

asked by Anonymous on March 23, 2010
80. ## chemistry

What is the final temperature of water when 2.70 grams of calcium chloride is dissolved in 25 mls of water at 25.5 Celcius.

asked by Chelsi on October 22, 2012
81. ## Algebra

asked by Student on April 9, 2018
82. ## pharmaceutical calculations

15g of potassium chloride is diluted in is diluted in 2 L of sterile water for injection.What is the final strength (w/v)?

asked by shanica on November 17, 2014
83. ## chemistry

If 765000 J of energy are added to 7.90 L of water at 291 K, what will the final temperature of the water be? Answer in units of K.

asked by zack on April 30, 2015
84. ## chem

Calculate the final pressure, in atmospheres, for each of the following with n and V constant. A gas with an initial pressure of 1.20 atm at 82∘C is cooled to -28∘C.

asked by bianca Barbosa on November 17, 2014
85. ## Physics

What is the final speed of an object and how far does it travel while accclerating if its initial speed is 10m/s and it accelerates at 8.9m/s squared for 5 s

asked by Allen on May 3, 2016
86. ## geometry

Could we multiply the following dimensions 9yards x 6 yards x 3 yards and then convert the final answer into cubic feet?

asked by kelly on March 10, 2011
87. ## Physics(check)

17)Under what conditions can an object travel a certain distance and yet its resultant displacement be zero? When the final position is the same as the initial position.

asked by Jon on March 30, 2008
88. ## Chemistry

If 12.0 gram of ice are dropped in 150. ml of water at 45 degrees celcius, what is the final temperature of the water?

asked by Thao on April 12, 2011
89. ## maths

now there is a pool, the height of the pool is 48cm and the width is 2m, now 3 quarters are full, what will be the final answer in litres?

asked by anna on March 2, 2014
90. ## statistics

Statistics students were asked to go home and fill a 1-cup measure with raisin bran and to tap the cup gently on the counter 3 times to settle the contents. Then, if necessary, add more raisin bran to bring the contents exactly up to the 1-cup line. Once

asked by joe on January 13, 2015
91. ## stats

SAT math scores approx. follow a normal distribution, with mean 500 and standard deviation 100. What % of students should have an SAT math score above 500? I think I use mean (500) + z-score * SD (100), but I do not know how to get the z-score?

asked by CM on September 28, 2009

Dear Mimmy, It’s almost half-term. We’re all studying for our tests. Tomorrow we’re supposed to go to a classical music concert at the Skenderija Hall. Our teacher says we shouldn’t go because there will be 10,000 people, pardon me, children,

asked by jam jam jam on November 20, 2017
93. ## math

The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 State the domain and range of this

asked by james on March 13, 2012
94. ## HARD PHYSICS

A playground is on the flat roof of a city school, 5.7 m above the street below (see figure). The vertical wall of the building is h = 7.10 m high, to form a 1.4-m-high railing around the playground. A ball has fallen to the street below, and a passerby

asked by Anonymous on October 4, 2011
95. ## math

A playground is on the flat roof of a city school, 5.8 m above the street below (see figure). The vertical wall of the building is h = 7.30 m high, to form a 1.5-m-high railing around the playground. A ball has fallen to the street below, and a passerby

asked by anonymous on February 14, 2012
96. ## chem

An ethylene glycol solution contains 23.9 g of ethylene glycol (C2H6O2) in 86.9 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)

asked by Sara on May 21, 2011
97. ## Math

One model train travels around a loop every 5 minutes. The other travels on anothe loop every 4 minutes. If they begin at the same point at the same time, how much time will pass before they meet at that point again?

asked by Danessa on September 25, 2007
98. ## 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 →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 21, 2018
99. ## Chemistry

The melting point of aspirin : 128-137Celsius degree. The melting point of the crude aspirin was measured to be 128 Celsius degree. What does it indicate about the purity of the product?

asked by Cynthia on December 5, 2010
100. ## Math

Obtuse angles A and B are in standard position. Point P(-3,4) is on the terminal arm of angle A. Point Q(-9,12)is on the terminal arm of angle B. How are the measures of angles A and b related? Please explain...

asked by Dominique on December 18, 2012