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 196
1. Physics

"Luke Skywalker mixes 250g of hot water (75 deg C) with 500g of cool water (15 deg C). What is the final temperature of the water?" If someone could just give me a formula, I'd be fine. :)

asked by Jen on October 4, 2008
2. Calculus - Taylor #2

Find the Taylor series for f(x) centered at the given value of 'a'. (Assume that 'f' has a power series expansion. Do not show that Rn(x)-->0.) f(x) = x3, a = -1 and what i've done so far: f (x) = x^3 f ' (x) = 3x^2 f '' (x) = 6x^1 f ''' (x) = 6x f (-1) =

asked by COFFEE on July 28, 2007
3. CHEMISTRY

A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0°C are added to 97.3 g water in the calorimeter at 16.0°C. The final temperature is 26.0°C. Calculate the heat capacity of the calorimeter in

asked by Sarah on April 17, 2012
4. Alg 1

To earn a B in your Algebra class, you must achieve an unto under test average between 84 and 86 (inconclusive). You scored 86,85, and 80 on the first three tests of threading period. What possible scores can you earn on the fourth and final test to earn a

asked by Taylor on September 7, 2016
5. Science

An air balloon is at rest in the air and a stone is dropped from it. It passes a 81m tower in quarter of a second and comes on the ground. Find the final velocity and the height of the air balloon.

asked by Sahil Khan on August 22, 2014
6. Physics

Two converging lenses are separated by 23.60 cm. The focal length of each lens is 12.60 cm. An object is placed 35.80 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right. Answer in cm

asked by Elizabeth on April 23, 2013
7. chemistry

10. An aqueous solution is prepared by diluting 3.30 mL acetone, CH3COCH3, (d=0.789 g/mL) with water to a final volumeof 75.0 mL. The density of the solution is 0.993 g/mL. What is the molarity and molality of acetone in this solution?

asked by Anonymous on April 3, 2012
8. Chemistry - Science (Dr. Bob222)

Ammonia is a weak base with a Kb of 1.8 x 10-5. A 100.0 mL sample of 0.13 M aqueous solution of ammonia (NH3) is mixed with 87 mL of 0.15 M solution of the strong acid HCl, calculate the pH of the final solution. A) 2.9 B) 11.1 C) 8.8 D) 5.2 E) None of the

asked by Ana on May 6, 2014
9. science

A 30-g iron bar at 100degreeC is placed in 200 g of water at 20degreeC. If the specific heat capacity of iron is 0.11 cal/gdegreeC, to what final temperature will the iron bar cool?

asked by Debra on October 25, 2011
10. Chemistry

100 grams of glucose is mixed with 500 grams of water. 10 grams of yeast is then added to the mixture. If the reaction goes to completion, what is the mass of ethanol in the final mixture?

asked by William on April 28, 2011
11. English

Word box compact earmark scant strident Since the time we have to prepare for the final exams is exceedingly ____ we had better make the best of every hour This one is compact or scant? I think it's compact

asked by Jerald on March 20, 2013
12. CHEMISTRY

A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0°C are added to 97.3 g water in the calorimeter at 16.0°C. The final temperature is 26.0°C. Calculate the heat capacity of the calorimeter in

asked by Sarah on April 16, 2012
13. DYNAMICS

The 10-lb has an initial velocity of 10ft/s on the smooth plane. If a force F=(2.5t), where t is in seconds, acts on the block for 3s, determine the final velocity of the block and the distance the block travels during this time.

asked by HELP on March 5, 2013
14. Chemistry

A system initially has an internal energy U of 493 J. It undergoes a process during which it releases 107 J of heat energy to the surroundings, and does work of 225 J. What is the final energy of the system, in J?

asked by Chris on May 5, 2014
15. DYNAMICS

The 10-lb has an initial velocity of 10ft/s on the smooth plane. If a force F=(2.5t), where t is in seconds, acts on the block for 3s, determine the final velocity of the block and the distance the block travels during this time.

asked by HELP on March 5, 2013
16. physics

A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center, as shown in the figure below. The linear speed of a passenger on the rim is constant and equal to 6.00 m/s. A.What is the magnitude of the passenger's acceleration as

asked by andrea on February 2, 2011
17. physics

A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center, as shown in the figure below. The linear speed of a passenger on the rim is constant and equal to 6.00 m/s. A.What is the magnitude of the passenger's acceleration as

asked by mely on February 2, 2011
18. Macro

Real Disposable (Billions) Consumption Expenditures (Billions) Savings (Billions) Income \$100 \$150 ____________ 200 200 ____________ 300 250 ____________ 400 300 ____________ a. Graph the consumption function with consumption spending on the vertical axis

asked by Kay on April 16, 2013
19. physics

A projectile is shot from the edge of a cliff h = 285 m above ground level with an initial speed of v0 = 155 m/s at an angle of 37.0° with the horizontal. (a) Determine the time taken by the projectile to hit point P at ground level. Incorrect: Your

asked by zg on October 16, 2014
20. Physics

1)A student at a window on the second floor of a high school building sees his math teacher coming along a walkway besides the building. He drops a water balloon from 18.0 m above the ground when it the teacher is 1.00 m from the point directly beneath the

asked by Genevieve on July 29, 2006
21. Physical Science

A hockey puck moving at 28 m/s is caught by an 80.00 kg man who was at rest. The man and puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity?

asked by jordan on April 12, 2012
22. fractions

In Mr. Johanessen's class, 1/4 of the students failed the final exam. Of the remaining class, 1/3 scored an A. What fraction of the whole class passed the test but scored below an A?

asked by jeff on January 8, 2015
23. operating a car

1. The sticker price on a new car includes: A.The final selling price of the vehicle B.an extended warranty C.everything you need to know about the vehicle D.the retail price of everything that comes with that particular vehicles. i got B

asked by Ciara on October 13, 2011
24. Physics

What is the force at which a bowling ball when it sticks the pins given the final speed of the bowling ball. Now account for friction and angular rotation of the ball

asked by Ron on July 3, 2012
25. Math

A provider requested 2% salicylic acid ointment. How many grams of a base ointment should be added to 60 g of 3% salicylic ointment to prepare the final product?

asked by Niricoel on July 6, 2012
26. Chemistry

3490 J of heat are added to a 20.4 g sample of iron at 20◦C. What is the final temperature of the iron? The specific heat of iron is 0.449 J/g · K. Answer in units of K.

asked by Nicole on October 24, 2015
27. physics

A hockey puck has an initial velocity of 44 m/s and a final velocity of 34 m/s. (a) If it travels 25 m during this time, what is the acceleration? m/s2 (b) If the mass of the puck is 0.13 kg, what is the horizontal force on the puck? N

asked by mike on September 5, 2010
28. chem

A gas has pressure of 4.62 atm when its volume is 2.33 L if the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? express the final pressure in torrs

asked by jerson on April 28, 2008
29. opertating a car

The sticker price on a new car includes: A.The final selling price of the vehicle B.an extended warranty C.everything you need to know about the vehicle D.the retail price of everything that comes with that particular vehicles. i got D

asked by Ciara on October 14, 2011
30. chemistry

A 28.4 L sample of methane gas is heated from 35.0 C to 76.0 C. The initial pressure of the gas is 1.00 atm at 35.0 C. Assuming constant volume, what is the final pressure of the gas

asked by sandy on November 20, 2011
31. science

A hockey puck moving at 28 m/s is caught by an 80.00 kg man who was at rest. The man and puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity?

asked by Demitrius scott on May 8, 2012
32. chemistry

A gas has a volume of 5.60 at 0. What final temperature in degrees Celsius is needed to cause the volume of the gas to change to the following, if (number of moles of gas) and are not changed?

asked by Anonymous on March 24, 2011
33. math

Mr. Mole determined that 2/3 of the students in his math class had pased the final exam. If 16 students passed the test, how many students are in Mr. Moles class?

asked by essence on July 21, 2012
34. Science

IF 8.5g of KOH powder are placed in 100g of water at room temperature of 20degree Celsius, what is the final temperature of the solution. KOH K+OH H=-57.61 KJ/MOL KOH

asked by Meena on October 7, 2017
35. AP Chemistry

We mix 193 grams of oxygen gas with 39 grams of argon gas in a volume of 1140 mL at 37C. What will be the final pressure of the gas mixture?

asked by Anonymous on October 15, 2013
36. physics

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.

asked by jim on June 2, 2011
37. physics

Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s.

asked by erica on June 2, 2011
38. science

A 60.0-mL 0.508 M glucose (C6H12O6) solution is mixed with 115.0 mL of 2.43 M glucose solution. What is the concentration of the final solution? Assume the volumes are additive.

asked by Kiana on February 27, 2011
39. Science

A car is travelling in the velocity of 20m/s.After 30 sec it covers a distance of 1200m.calculate the accelaration of the car and final velocity of the car.

asked by Dev on July 5, 2016
40. math

flora bought 3 notebooks for 10 pesos each, a box of pencils for 21 pesos and a box of pens for 35 pesos. write the final expression and solve.

asked by riza on August 1, 2016
41. chemistry

3960 J of heat are added to a 27.6 g sample of iron at 25 ◦ C. What is the ﬁnal temperature of the iron? The speciﬁc heat of iron is 0.449 J/g · K. Answer in units of K

asked by molly on September 2, 2012
42. Social Studies

1. In Athens the system of government became a direct democracy, in which the people participated directly in government. In the Roman republic, citizens participated in government (1 point) in an identical way. through meetings held in the marketplace. by

43. chemistry

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, find its volume, and calculate its density. To save

asked by fatimah on September 21, 2011
44. Math

A box of Brand A laundry detergent washes 20 loads of laundry and costs \$6. A box of Brand B laundry detergent washes 15 loads of laundry and costs \$5. In the ratio tables that follow, fill in equivalent rates of loads washed per dollar. Include some

asked by Ginny on March 12, 2019
45. religion

am i understanding this word correctly. Its under the Hindu RELGION FOR THE TERM: Guru: what i understood a guru is like a teacher or a spiritual guide that teaches others to follow them as becoming the guide just like a teacher for others. What means

asked by jasmine20 on December 29, 2006
46. Physics

A projectile is shot from the edge of a cliff h = 225 m above ground level with an initial speed of v0 = 155 m/s at an angle of 37.0° with the horizontal a. Determine the time taken by the projectile to hit point P at ground level. b. Determine the range

asked by Bridge on September 17, 2011
47. physics

1. consider a satellite with a period of 8 hours. if the radius of the satellite's orbit is doubled, what is the period for this satellite's. 2.what is the minimum amount of heat ( in joules) needed to heat 5.0kg (5 liters) of liquid water from it frezing

asked by taiwo on July 9, 2010
48. AP Chemistry

(a)calculate the mass percent of carbon in the hydrated form of the solid that has the formula BeC2O4 X 3 H2O (s). I divided 24.02 g by 151.08 g and got .16, or 16%. is that correct? Also, I'm having trouble with this follow up question. When heated to 220

asked by Patrick on September 19, 2007
49. Physics

A point charge is placed at the center of a net uncharged spherical conducting shell of inner radius 2.5 cm and outer radius 4.0 cm. As a result, the outer surface of the shell acquires a surface charge density σ = 71nC/cm2. Find (a) the value of the

asked by Kaleem on February 20, 2016
50. Chemistry

The melting temperature of the fluorides of selected alkali metals and alkaline earths are listed below (see Table). If one considers the trend of the listed melting temperatures in terms of both the ionic character of the bonds and the ionic potentials of

asked by Karl on January 22, 2011
51. Social Studies Ms. Sue please

Sorry there are so many questions!!!! 1. The economic centers of the Northeast are the region's __________. (1 point) farms fisheries forests cities 2. Two major ports in the South are ______________________. (1 point) Atlanta and Dalton Raleigh and Austin

asked by Delilah on March 27, 2013
52. Ed Tech

When you see pop-ups while working on the computer, what should you do?( 1 point) A. Always click No. B. Read the text, and then choose the appropriate response.( my answer) C. Click outside the pop-up window to make the window disappear. D. Close the

asked by Hi😱 on January 15, 2019
53. Ed Tech

When you see pop-ups while working on the computer, what should you do?( 1 point) A. Always click No. B. Read the text, and then choose the appropriate response.( my answer) C. Click outside the pop-up window to make the window disappear. D. Close the

asked by Hi😱 on January 17, 2019
54. trigo

The terminal side of angle θ lies on the line y=-mx for m>0 and x>0.calculate the values of the trigonometric function

asked by tiq on July 8, 2014
55. Calculus

Find the slope of the tangent line to the graph of the function f(x)=x*e^x at x=3 correct to two decimal places.

asked by kay on February 27, 2010
56. Mathematics

What is the slope of the line described by the equation 1 _____________________________-x+-y=5___ ________________________________3______ i hope someone understands this problem

asked by Kendra on December 15, 2010
57. Calculus

Find the points on the graph of f where the tangent line is horizontal. f(x) = x3 - 15x2 (x, y) = ( , ) (smaller x-value) (x, y) = ( , ) (larger x-value)

asked by Mike on June 13, 2013
58. math

Divide a clock face with 1 straight line so that the sum of the numbers in each part are equal.

asked by Annabella Richards on June 12, 2011
59. calculus

Find the volume of the solid obtained by rotating the region bounded by the given curves about the line x=-3 y=x^2, x=y^2

asked by Anonymous on December 15, 2010
60. math

Turn 7 21 into a percent and decimal. First simplify the fraction. Show your answer on the number line.

asked by julie on March 9, 2011
61. calculus

Find the volume of the solid formed by revolving the region bounded by the graphs of y=3-(x^2) and y=2 about the line y=2

asked by karlei on April 16, 2010
62. Math

Can someone check this for me please... 4x + 8 >= (that is greater and equal to) 4 and 2x - 13 >= -5 the solution: {x|x>= 4} on the graph the highlighted line goes to the left...is this correct?

asked by Carmen on November 2, 2008
63. Math help

Convert the repeating decimal to a/b form, where a,b are integers and b =0(there is a slash through the equal sign) 2.36(there is a line over .36)'

asked by Kimberly on August 5, 2015
64. calc

Find the volume of a solid formed by region R which is bounded by y = 1/(x^2+1) and y = -cos(x) and rotated about the line y = -2.

asked by taylor on December 19, 2012
65. Social studies

Can you help please What happened after the pope set up the line of demarcation in 1493 to keep the peace between Spain and Portugal thanks

asked by jouan on April 1, 2009
66. Physics

Q: A car travels in a straight line for 4.6 h at a constant speed of 95 km/h . What is its acceleration? Answer in units of m/s 2

asked by anonymous on October 5, 2015
67. sociology

An unskilled assembly line worker replacing a skilled carpenter is an example of __________. (Points : 1)

asked by mb on March 17, 2013
68. math

find the lenght of the longest straight line which can be drawn on a rectanglelar chalkboard which measure 2.2m by 1.2m

69. physics

Explain why helicopters need 2 rotors to fly in a straight line. Talking about centripetal force.

asked by Stuart on December 14, 2016
70. Mathematics

Determine the shortest distance from a house situated at the origin to a road that is represented by the line 3y+x+18=0

asked by Mokotedi on March 8, 2011
71. math

draw a number line and label at least 5 points as fractions and decimals.explain your answer

asked by bebe on February 2, 2012
72. calculus

Find the volume of the frustrum of the right circular cone generated by rotating the line y=x+1 about the x-axis between x = 0 and x = 3

asked by livelaughlx3ve on February 6, 2012
73. K

Find the volume V of the solid obtained by rotating the region bounded by the given curves about the specified line. y = 3e^(-x), y = 3, x = 2; about y = 6

asked by Gagan on February 24, 2017
74. calculus

When region R is revolved about the line y=c, the resultant solid has a volume of 720*3.14. Find all possible values of c.

asked by Kristen on February 23, 2012

How to Prepare Budget Matrix that consists of line-item, functional, and program budgets

76. calc

Find the volume of a solid formed by region R which is bounded by y = 1/(x^2+1) and y = -cos(x) and rotated about the line y = 3.

asked by taylor on December 19, 2012
77. geometry

M is the midpoint of line segment AB.Find the missing coordinate for each 10a. A:p-4 M:8 B:p+12 must use ruler postulat

asked by shane on September 29, 2010
78. calculus

Describe the slope of the tangent line to the curve defined by x 2 + xy - y 2 = 5 when x = 2. positive negative zero undefined

asked by shira on February 23, 2014
79. Algebra

find the vertex, line of symmetry, and minimum or maxium values of the quadratic equation f(x)=9-x^2

asked by Jess on June 15, 2011
80. Communication English

stimulus response line theory of communication as a process which can be derived by noise. Do you agree?

asked by Ibrahim on April 14, 2010
81. Math

Suppose f(x) = 4x^5-(1/x^4) Find the slope of the tangent line to the graph of y = f^–1(x) at (3, 1). You get: 1/24 1/16 00062 1620 972

asked by Thomas on April 9, 2015
82. Calculus I

Which of the following represents the volume of the solid formed by revolving the region bounded by the graphs of y =x^3, y = 1, and x = 2, about the line x = 2?

asked by Jer on April 22, 2016
83. Dilation

The answer to given a scale factors of 2,find the coordinmates for the dilation of the line segment with endpoint (1.2) and (3-3.

asked by Dorothy on December 17, 2016
84. calc

Consider the following function. f(x) = 4x3 + x2 - 0.05x + 10 Find the two points on the graph at which the tangent line is horizontal. G

asked by Anonymous on September 30, 2010
85. math

If a line whose x- and y- intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. -1 D. undefined I'm thinking it's 0, I don't know though.

asked by Ryan on August 3, 2015
86. math

If a line whose x- and y- intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. -1 D. undefined I'm thinking it's 0, I don't know though.

asked by Ryan on August 3, 2015
87. Calculus

Find an equation (in terms of x and y) of the tangent line to the curve r=3sin(5theta) at theta=pi/3

asked by help on February 21, 2012
88. calculus

Find the volume of the solid obtained by rotating the region bounded by the curves y=x^6, y=1 about the line y=4

asked by Anonymous on December 14, 2010
89. Linear Algebra

A test Question: Find the parametric equations of the line through the origin that is orthogonal to the plane 2x+4y-z=0

asked by Simon on December 14, 2011
90. physics

A car travels in a straight line for 3.9 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s2

asked by chursea on October 30, 2014
91. Algebra

f(x)=1-x^2. Looking for the vertex and an equation of the line of symmetry. f(x)=-x^2+5x+36 Looking for the x, and Y coordinates. I seem to be entering the answers backwards, cannot understand. Please help.

asked by Maria1 on April 26, 2012
92. math

The terminal side of theta is in Quadrant III and lies on the line y = 2x. What are the 6 trig functions?

asked by Becky on April 12, 2010
93. Math

A number line starts with 7 and ends with 9.There are 7 marks in between. The letter A is above the 5th mark. What is the value of A as a fraction

asked by Mary on March 4, 2013
94. Vocabulary

A line horizontally drawn from the center of the circle. A. Axiom B. Vertex C. Circumference D. Radius D?

asked by quick help needed on June 3, 2016
95. Precalc

Find the derivative of: f(x) = 1/(3x)^4 + 3x^4 Determine the points, if any, at which the function has a horizontal tangent line y = 5x^3 - 15x^2 y = 2x^3 + 6x^2 thank you!

asked by Heather on April 15, 2015
96. Algebra

Write the equation of the line passing through the given pair of points. (2,-3) and (2,4) I will be happy to critique your work on this.

asked by Linda on May 20, 2007
97. algebra

write the slope intercept equation for the line containing the given pair of points (6,8) and (3,5) please help I have been working on this for three day's

asked by carol on April 28, 2012
98. Ordinary Differential Equation

Form the differential equation of the family of straight line with slope and y- intercept equal

asked by Bilal on February 19, 2017
99. physic

a car travels in a straight line for 3 h at a constant speed of 53 km/h. what is the acceraleration? answer in units of m/s2.

asked by ash on November 1, 2008
100. Math

How many different ways can Kathy, Jessie,and Daniella line up, single file,at the drinking fountain? Thanks