# 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 60-
## Pre-Calculus

Find the slope of the tangent line to the curve 2(x^2+y^2)^2=25(x^2−y^2) at the point (−3,−1)? Here's what I did: 2(x^4 + y^4) = 25(x^2-y^2) 2x^4 + 2y^4 = 25x^2 - 25y^2 8x^3 + 8y^3(dy/dx) = 50x - 50y(dy/dx) d/dx(8y^3 + 50y) = 50x - 8x^3 d/dx =

*asked by Ann on November 17, 2013* -
## maths

from a certain spot, the top of a triangle had an angle of elevation of 40 degree. move 15meter in a straight line towards the flag pole.Now to the top has an angle of elevation of 60degree.Find the height of the flagpole and it's distance from the second

*asked by basit on May 26, 2016* -
## CRT 205

Good morning Ms. Sue: Can you help me identify what type of fallacies these are? I'm having some difficulties. Thank you kihdly. 5. Letter to the editor: “I strongly object to the proposed sale of alcoholic beverages at County Golf Course. The idea of

*asked by Lyric Cannon on January 28, 2010* -
## Physics

A block of mass m=2 kg on a horizontal surface is connected to a spring connected to a wall (see figure). The spring has a spring constant k= 12 N/m. The static friction coefficient between the block and the surface is μs= 0.5 , and the kinetic friction

*asked by Phy on November 2, 2013* -
## Science

1. How does Earth’s rotation cause day and night? (1 point) As Earth rotates toward the east, the sun appears to rise in the west and set in the east. As Earth rotates toward the east, the sun appears to rise in the east and set in the west. Earth

*asked by Emery on February 7, 2019* -
## geomentry

points P and Q are on line segment AB on the same side of the midpoint of AB .Point P divides AB in the ratio 2:3 and Q divides AB in the ratio 3:4.If PQ =2 ,then the length of segment AB is ________

*asked by sunena on April 23, 2016* -
## college algebra

Use point-slope form to write the equation of the line with the given properties. Write the equation in standard form. m is undefined passing through P(-7, -7)

*asked by erin on October 13, 2010* -
## Chemistry

Consider the reaction: 2HCl(aq) + Ba(OH)2(aq) → BaCl2(aq) + 2H2O(l) ∆H = - 118 kJ Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.50 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25 oC and the

*asked by Nisah on September 16, 2012* -
## physics

a 0.300kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.80 m/s when it makes a head on collision with a stationary 0.150kg glider. (a) Find the magnitude and direction of the final velocity of each glider in the

*asked by chyenne on January 22, 2016* -
## physics

A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0° below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at

*asked by sarah on March 4, 2014* -
## english

16. What is the effect of the author’s use of assonance in the following line from “The Raven?” “For the rare and radiant maiden whom the angels name Lenore—” (1 point) A It creates emphasis on Lenore. B It explains Lenore’s appearance. C It

*asked by saliha on April 29, 2016* -
## English

16. What is the effect of the author’s use of assonance in the following line from “The Raven?” “For the rare and radiant maiden whom the angels name Lenore—” (1 point) A It creates emphasis on Lenore. B It explains Lenore’s appearance. C It

*asked by Keith on May 12, 2014* -
## math

Directions: Find the slope of any line perpendicular to the line through points(0,5) and (-3,-4). THis is what i did. m=(-4-5)/(-3-0)=(9)/(3)=3 y=mx+b using points :(0,5) 5=3(0)+b 5=b y=3x+5 so the slope of the perpendicular line is (-1)/(3) When finding

*asked by Jasmine20 on January 24, 2007* -
## Chemistry

Name and describe two colligative properties that are affected by solute concentration, then list whyone would be affected in that manner. So this is what i put for my answer Lowers freezing point: Each additional level of molal concentration lowers the

*asked by Carrie on May 26, 2012* -
## English

Hello all. I speak very little of english. My teacher emailed me this and I wan't to make sure I understand correctly. [The final exam will only cover material since the midterm.] this means that final exam will ONLY cover what we learned after midterm??

*asked by Shabihi on December 4, 2012* -
## Chem1LB

When 0.917 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 3.76C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

*asked by Alex Le on February 17, 2010* -
## chemistry lab

When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

*asked by tweety on February 23, 2009* -
## Math

the problem is to graph the equation below. 3x - y < 2 and x + y > 2 my solution is y = 3x - 2, y = -1x + 2 I,m lost at where my lines ar drawn. In y = 3x - 2 (y line is 3) and y = -1x +2 (y line is -1) or am I totaly lost. After continued effort I beleive

*asked by Sissy on May 27, 2007* -
## alegebra

1. What is the factored form of 4x 2 + 12x + 5? (1 point) (2x + 4)(2x + 3) (4x + 5)(x + 1) (2x + 1)(2x + 5) (4x + 1)(x + 5) 2. What is the factored form of 2x 2 + x – 3? (1 point) (2x + 3)(x – 1) (2x + 1)(x – 3) (2x – 3)(x + 1) (2x – 1)(x + 3) 3.

*asked by fluffy on February 4, 2014* -
## Business Finance

Immediate help needed for the following two questions: 15-12A. (Break-even point) You are a hard-working analyst in the office of financial operations for a manufacturing firm that produces a single product. You have developed the following cost structure

*asked by GypsyQueen on October 30, 2011* -
## Math

1. solve the equation. -9v - 5 = -95 A. 17 B. 11 C. 10 ** D. -10 2. Solve the equation. X/4 - 5 = -8 A. -27 B. -12 ** C. -7 D. 12 3. Solve the equation. d/3 + 10 = 7 A. 51 B. 20 ** C. 0 D. -9 4. Solve the equation. 2(2 - 2k) = -3k A. -4 B. 4 C. 6 D. 0 **

*asked by Anonymous on December 18, 2018* -
## Calculus

Find the volume of the solid formed by rotating the region bounded by the graph of y equals 1+ √x, the y-axis, and the line y = 3 about the line y = 5. a) 13.333 b) 17.657 c) 41.888 d) None of these

*asked by Alice on January 27, 2019* -
## Physics

An object with charge qo = 1.5μC and mass 0.7 g starts from rest at the +6V equipotential line. Calculate its change in potential energy and speed when it reaches the +2V line.

*asked by Amy on February 15, 2010* -
## Math

Given triangle ABC with A(-3, 2), B(-1, -4), and C(4, 1), write the equation for the line containing altitude line AR in standard form. A. x - y = 1 B. x + y = -1 C. x + y = 1 D. x - y = -1 I can't figure this out at all. It's been confusing me for a long

*asked by SkatingDJ on January 14, 2016* -
## Physics

An object with charge qo = 1.5μC and mass 0.7 g starts from rest at the +6V equipotential line. Calculate its change in potential energy and speed when it reaches the +2V line.

*asked by Amy on February 16, 2010* -
## Power circuit theory

A three phase fully transposed transmission line ha s solid conductors of 2 cm diameter, spaced at distances between centres of 3.65 m, 5.5 m and 8.2 m. Determine the inductance of the complete line per km.

*asked by Md on August 20, 2014* -
## eng/lit

in the sonnet against that time shakespeare in lines 1-12,which of the following is a main verb? a)come line 1 b)shall see line2 c) shalt pass line5 d)shall find line8 e)do ensconce line 9?

*asked by jan on October 6, 2011* -
## physics

A line of charge with a uniform density of 36.3 nC/m lies along the line y = -14.8 cm, between the points with coordinates x = 0 and x = 44.9 cm. Calculate the electric field it creates at the origin. Enter first the x- and then the y-component.

*asked by Anonymous on February 26, 2012* -
## Algebra

Name the line which have the following characteristics: 1) Passes through (2,3) & (0,-9) 2) Perpendiculat to the line 4x-2x=7 and through (1,-3) 3) Perpendicular to the segments with endpoints (2,1) & (-4,-1) and through the midpoint of the segment. If

*asked by Krissy on December 2, 2007* -
## Chemistry

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. Ans is 0.227M Who help me thanks a lot

*asked by Mohit on April 26, 2016* -
## algebra

for the system of inequalities y >= 2x - 1 and y = 2x - 1, but not y

*asked by tim on May 3, 2010* -
## algebra

for the system of inequalities y >= 2x - 1 and y = 2x - 1, but not y

*asked by tim on May 3, 2010* -
## English

Hi guys, I'm supposed to write a paragraph on why this flower crown represents spring. I've already written my concrete detail, and I have to write two sentences of commentary, but I have no idea what to write! Can you help?

*asked by Ana on January 11, 2019* -
## Dichotymus key...

I just some tips and help with a dichotymus key I'm doing in anatomy. (i hope I'm spelling it correctly) concerning simple structures of the skeletal system. Well there are 4 main classifications i chose to use; projections/processes, depressions/pits,

*asked by Chrissy on October 15, 2009* -
## History

1. Which of the following groups would most likely not want to remain loyal to Great Britain during the pre-Revolutionary period? (1 point) Scots from St. Andrew’s parish government officials Anglican ministers Indian traders 2. Which was a benefit

*asked by HELP MEEEEE on November 5, 2014* -
## American Governent

1. What type of power does the Constitution grant to the Supreme Court? (1 point) executive power federal power judicial power legislative power 2. Which are examples of judicial restraint in the Supreme Court? Select all that apply. (3 points) The verdict

*asked by Joey on December 12, 2016* -
## science

If the kinetic energy of a 0.62kg stone is 2.3J at its highest point and 9.4J at its lowest point how do I calculate the height at the highest point. Thanks The difference in KEnergy has to be equal to the change in gravitational PE. mgh = 9.4-2.3

*asked by sarah on January 16, 2007* -
## Maths

There is a point (P) on the graph of [x^2+y^2- 136 x + 12 y + 4560 = 0] and a point(Q) on the graph of [(y + 6)^2 = x^3 - 116 x^2 - 417 x + 267460] such that the distance between them is as small as possible. To solve this problem, we let ((x,y) be the

*asked by Salman on November 19, 2009* -
## Physics

As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.89 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed at point A.

*asked by Anonymous on October 24, 2014* -
## Calculus

There is a point (P) on the graph of [x^2+y^2- 136 x + 12 y + 4560 = 0] and a point(Q) on the graph of [(y + 6)^2 = x^3 - 116 x^2 - 417 x + 267460] such that the distance between them is as small as possible. To solve this problem, we let ((x,y) be the

*asked by Salman on November 19, 2009* -
## Calculus

There is a point (P) on the graph of [x^2+y^2- 136 x + 12 y + 4560 = 0] and a point(Q) on the graph of [(y + 6)^2 = x^3 - 116 x^2 - 417 x + 267460] such that the distance between them is as small as possible. To solve this problem, we let ((x,y) be the

*asked by Salman on November 20, 2009* -
## Physics

A small sphere of mass 2 kg is attached to the end of a cord of length 2m and rotated in a vertical circle about a fixed point O. Determine the tension in the cord at the lowest point of the trajectory if the speed at this point is 7m/s. Use g=9.8 m/s2.

*asked by Anonymous on November 8, 2014* -
## Physics

A small sphere of mass 3 kg is attached to the end of a cord of length 2m and rotated in a vertical circle about a fixed point O. Determine the tension in the cord at the uppermost point of the trajectory if the speed at this point is 8m/s. Use g=9.8 m/s2.

*asked by Anonymous on November 8, 2014* -
## Math

*asked by Salman on November 19, 2009* -
## Maths

*asked by Salman on November 20, 2009* -
## Math

*asked by Salman on November 20, 2009* -
## 5th Grade Science

The force of attraction between the Earth and an object is called? A. Magnetism B. Mass C. Energy D. Gravity http://en.wikipedia.org/wiki/Gravity hey ken. someone told me it was gravity So you think it is gravity

*asked by Missy on April 18, 2007* -
## Geometry

Hey! Thanks for checking my question out! ____ 5. In an isosceles triangle with two congruent sides, the angles across from the legs are called ________ angles. My Answer: base Could someone please check my answer? Thanks! - Da Fash

*asked by Da Fash on November 8, 2017* -
## binomial distribution

hey, i'd really appreciate some help with this question: A medical treatment is successful 75% of the time. A hospital wishes to treat a group of patients. How many patients should they take so that the probablity that all are cured is 1/10? I know that

*asked by elle on August 25, 2007* -
## Chemistry

Having trouble with this question on my homework =/ 200mL of 0.5M H2SO4 is combined with 500mL of 0.1M NaHCO3. List the physical states of all products, give molarity of aqueous ions and grams of gases and solids. Thanks alot guys!! Any help is awesome

*asked by Greg on May 3, 2014* -
## science

A book is on top of a table.Earths gravity exerts a constant force of 15 N on the book.why does the booj not move as a result of this force ? An object is traveling in a straight line in space. No firces are,affecting it. What will happen to the objects

*asked by tahani alkhatib on January 24, 2016* -
## Physics

I'm having trouble relating Work, with Electric Field, with Kinematics. The question is asking: How fast and what direction is the particle moving, given: Disk: radius = 0.1m, surface charge density = 3.7mC/m2 Particle: 4.5 mC, mass = 75 mg accelerates

*asked by so CONFUSED! on February 14, 2010* -
## Programming

Hi guys! I have a humanitarian turn of mind, and that's why just can't understand programming. On the other hand, I don't want to spoil my average performance. Thus, I have to use homework-help online services, like Homework-Desk. Do you know any other

*asked by Sally Sonderson on December 15, 2014* -
## MATH

24/(x+1) + 12/(4-x) = 14 Multiply both sides by (4-x)(x+1) 24(4-x) + 12(x+1) = 14(4-x)(x+1) 96 - 12x + 12 = -14(x^2 -3x -4) = -14x^2 +42 x +56 Combine terms and solve for x. sorry guys, here's another.I'm not the greatest at math but i do know some... The

*asked by drwls on January 17, 2007* -
## Thanks

I'm probably not supposed to do this, but you can delete this post after. I just wanted to thank all the tutors and teachers on this website that take time out of their day to help students with questions about subjects that they need some assistance with.

*asked by Glossier on December 12, 2018* -
## Physics

Ok guys, state the surface powers required to produce the following lenses with +5.75D front curves. a) -0.50DS b) +0.50DS c) +1.75DS d) -1.25DS i'm not sure if it's as straight forward as calculating the difference, eg. a) +5.75 - -0.50 = +6.25. Any help

*asked by Any.help.REALLY.appreciated on November 4, 2013* -
## english

at school i am reaing the kite runner as the class novel. i have one comprehension question im notsure how to answer. can somebody help me. the question is: the novel begins with a flashback. what do you think is its purpose? what do you learn about the

*asked by lalala on November 7, 2011* -
## Math

Im sorry for bombarding you guys with questions. I've only needed help with 3 of 40 so far.. Anyways, moving on! 3! = 3 * 2 * 1 4! = 4 * 3 * 2 * 1 5! = 5 * 4 * 3 * 2 * 1 30! = 2^x * N where N is odd. What is the value of x? I have no idea where to start,

*asked by Anonymous on May 5, 2017* -
## Geometry

One endpoint of a line segment is (8,-1). The point (5,-2) is one-third of the way from that endpoint to the other endpoint. Find the other endpoint.

*asked by Jackie on October 1, 2011* -
## line segments

One endpoint of a line segment is (8, -1). The point (5, -2) is one-third of the way from that endpoint to the other endpoint. Find the other endpoint.

*asked by Breanna on October 6, 2014* -
## geometry

One endpoint of a line segment is (8, −1). The point (5, −2) is one-third of the way from that endpoint to the other endpoint. Find the other endpoint.

*asked by Mark on May 31, 2015* -
## Physics help please!

The pressure of a fixed quantity of an ideal gas was held constant. The initial volume was 8.00 cubic meters and the final volume was 2.50 cubic meters. What was the final temperature in kelvins if the initial temerature was 188 degrees fahrenheit...

*asked by Genny on June 11, 2012* -
## Math

1. Find the next number in the pattern. -1, 3, 7, 11 a. 16 b.77 c.15

*asked by Zoe Mckenzie on December 2, 2015* -
## Math

At the half time show a marching band marched in formation the lead drummer started at a point with coordinates (-3, -5) and moved 3 steps up and 1 step right. I have to write a rule to describe the translation and figure out the coordinates of the

*asked by Becki! on January 5, 2019* -
## pre calc

at a single ticket booth, customers arrive randomly at a rate of x per hour. the average line length is given by F(x)= x^2/400-20x Where 0

*asked by wally on November 25, 2014* -
## algebra

1. Explain the concept of modeling. How does a model describe known data and predict future data? How do models break down (what can cause this)? Can you think of an example? 2. Imagine that points on a line on a Cartesian graph represent approximately the

*asked by Mayra Jacobs on May 6, 2014* -
## As physics

Describe how the vertical component of the velocity of the water varies form point X to point Z? Image with a flat horizontal line with a curve on top (beg curve: X, top middle curve: Y, End bottom curve: Z) Mark scheme Answer: decreases from x to y

*asked by cylinder on November 9, 2017* -
## discrete mathematics

Six discrete mathematics student:Bahirah,Dinesh,Johan,Adam,Felina and Syahirah are going to stand in a line. How many ways can they stand if: a)Syahirah must be in the third position? b)Dinesh must be second and Fellina third? c)Boys and girls alternate,

*asked by roze on December 30, 2016* -
## Physics

A 5.36 kg object falls freely (ignore air resistance), after being dropped from rest. Determine the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following. (a) first meter of fall initial kinetic energy 0 J

*asked by George on March 8, 2014* -
## english

Every now and then, instead of using e-mail, mail a letter to your grandparents. We live in a fast-paced world. We feel comfortable using computers to send e-mails and Instant Message. Nana doesn’t live in that time zone. Forget all those fancy fonts and

*asked by Greg on March 27, 2011* -
## Physics

Dumping sealed containers from ship decks that are 2 meters above the water surface. With a final depth of 100 meters. Find the final velocity of the container on impact. 1. Container in the shape of right circular cylinders, containers of .5 meters

*asked by Christopher on October 31, 2010* -
## Heat and Molar Mass

An aqueous solution containing 34.6 g of an unknown molecular nonelectrolyte compound in 142.0 g of water was found to have a freezing point of 1.2 degrees C. Calculate the molar mass. A sample of steam with a mass of 0.553 g and at a temperature of 100

*asked by Amy on January 15, 2013* -
## Pre-Calculus

Determine the derivative at the point (2,−43) on the curve given by f(x)=7−7x−9x^2. I know that the answer is -43, but I was wondering if it was just a coincidence that the derivative at the point (2,−43) is -43, or is there a reason why -43 is the

*asked by Ann on October 19, 2013* -
## Chemistry

The boiling point of an aqueous solution is 102.48 °C. What is the freezing point? I know that formula for freezing point is delta Tf = Kf*m but what do I plug in for each?

*asked by Anon on January 29, 2013* -
## astronomy

The orbit of the comet Encke has a perihelion distance of 0.331 AU and an eccentricity of 0.850. Suppose that the arrival of the comet at its perihelion distance happens to occur at a point directly in line between the Sun and the Earth. Roughly how many

*asked by ev on October 21, 2015* -
## Math

Solve the problem. Round to the nearest tenth, if necessary. A long-distance runner runs 5 miles directly south and then faces due east and runs another 7 miles. How far is the runner, in a straight line, from his starting point?

*asked by Missy on September 15, 2010* -
## physics

Two small loudspeakers emit sound waves of the same amplitude and frequency in phase with each other. The waves produce an interference pattern such that the distance from the right bisector to a point P on the third nodal line is x3. The wavelength of the

*asked by tom on January 7, 2018* -
## Physics

After 35 minutes of jogging, at the 9-km point in a total 10-km race, jogger 1 is behind the leader and moving at the same speed. What would have to be your accelearation in order to catch up to the finish line? Assuming the leader maintains a constant

*asked by George on January 10, 2009* -
## Physics

After 35 minutes of jogging, at the 9-km point in a total 10-km race, jogger A is behind the leader and moving at the same speed. What would have to be your accelearation in order to catch up to the finish line? Assuming the leader maintains a constant

*asked by George on January 10, 2009* -
## This needs tobe turned in in 10min AT MOST URGENT!

1. x over 5= –2 (1 point) –45 35 –10 21 2. 13x – 7 = 136 (1 point) 11 15 8 9 3. Solve the following equation: 3x – 3 = 15 (1 point) 4 5 6 7 4. Ernesto loses 14.5 pounds in 7 months. Now he weighs 156.5 pounds. Which equation can be used to find

*asked by Gabby on December 21, 2012* -
## College physcs

A capacitor in a single-loop RC circuit is charged to 64% of its final voltage in 1.5 s. Find the time constant for the circuit. Find the percentage of the circuit's final voltage after 3.9 s . Vc/Vi= %

*asked by Lanise on February 10, 2010* -
## physics

Air in a diesel engine cylinder is quickly compressed from an initial temperature of 21.1°C, an initial pressure of 1.00 atm, and an initial volume of 670 cm^3 to a final volume of 44.5 cm^3. a) Assuming the air to be an ideal diatomic gas, find the final

*asked by maria on December 31, 2011* -
## physics

Air in a diesel engine cylinder is quickly compressed from an initial temperature of 21.1°C, an initial pressure of 1.00 atm, and an initial volume of 670 cm^3 to a final volume of 44.5 cm^3. a)Assuming the air to be an ideal diatomic gas, find the final

*asked by maria on December 27, 2011* -
## Grammar-Writeacher

My last set of Questions: Match the part of speech for each word. a. noun b. pronoun c. antecedent ???? d. adjective e. adverb f. verb g. preposition h. conjunction 1. I read Moby Dick and Wuthering Heights last semester. a. read = f. verb b. last = d.

*asked by Leslie on May 13, 2011* -
## math

With regards to question J: The variables x and y are connected by the equation y = x2 - x - 5. Some corresponding values of x and y are given in the table below. x -4 -3 -2 -1 0 1 2 3 4 5 y 15 7 a -3 -5 b -3 1 7 15 (a) Calculate the values of a and b (b)

*asked by jun on January 24, 2011* -
## Math

A line has x-intercept (5, 0) and is perpendicular to the line 2x + 8y = 10. Find the y-intercept of the line.

*asked by Miley on December 27, 2013* -
## Math

A line has y-intercept (0, 3) and is perpendicular to the line 2x + y = 3. Find the x-intercept of the line.

*asked by John on December 27, 2013* -
## algebra

i am to consider the line -x-3y=2 what is the parallel line slope and the perpendicular line slope

*asked by mary on March 10, 2013* -
## algebra

Using the equation y=-2x-5 a. The slope of this line is b. The y intercept of this line is c. The x intercept of this line is

*asked by j.wallace on October 15, 2012* -
## Helppp

Mom in need of help! The x-intercept of a line is -5 and the y-intercept of the line is -2. What is the equation of the line? A) y=-5/2x-5 B) y=2/5x+2 C) y=5/2x-2 D) y=-2/5x-2 Thanks so much

*asked by Kandy on October 14, 2013* -
## Health

4.) Most unintentional poisonings occur in children under... (1 point) A. 10 B. 2 C. 5 *** D. 6 months 9.) As a universal precaution, use ___ whenever possible if you are going to be in contact with bodily fluids. (1 point) A. latex gloves *** B. band-aids

*asked by tessa on February 18, 2016* -
## chemistry

When 0.712 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 116C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant

*asked by wilson on May 18, 2009* -
## Chem 1LB

When 0.678 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 11.0C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to

*asked by Libit on February 21, 2010* -
## Chem 1LB

When 0.678 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 11.0C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to

*asked by Libit on February 21, 2010* -
## Physics

A roller-coaster car speeds down a hill past point A where R1 = 8.2 m and then rolls up a hill past point B where R2 = 15.4 m, as shown below. (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.30 ✕ 104 N

*asked by Anonymous on December 16, 2014* -
## science( chem)

When 100.0ml of a weak acid was titrated with 0.09381M NaOH, 27.63ml were required to reach the equivalence point. The pH at the equivalence point was 10.99. What was the pH when only 19.47ml of NaOH had been added ? I'll just post my work and I need

*asked by christina on July 22, 2007* -
## math

Dental services. The national cost C in billions of dollars for dental services can be modeled by the linear equation C=2.85n+30.52, where n is the number of years since 1900 (Health Care Financing Administration,.a) find and interpret the C-intercept for

*asked by Geno on January 23, 2009* -
## Language

Choose the meaning the best matches the word in italics. The president of the large company felt as if he had reached the PINNACLE of his career. A. Lower point B. Point or towering formation C. Hughes point of achievement •• D. Rise toward success or

*asked by Tayler on January 19, 2016* -
## algebra

Simplify. Do not use negative exponents in the answer. 12x-2y4 -3xy-7 There should be a line between like a fraction but it did not copy or paste. This is the answer I got 12 x^-2 y^4 = 12y^4/x^2 -3xy^-7 = -3x/y^7 it was wrong. 12x^-2y^4 / -3xy^-7 = 12/-3

*asked by slomo on January 11, 2015* -
## algebra

Find the slope of the line through the given points. (2,4) (6,-3). m=y2-y1 over x2-x1. (-3)-(4) over(6)-(2) -3-4 over 6-2 -7 over 4. I plotted the two coordinates (2,-4) (6)(-3), and the slope is -7 over 4, right? How do you plot the slope? I think you

*asked by peggy on January 26, 2007*

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