Popular questions and responses by Nic
  1. calculus

    please help. Compute Δy and dy for x = 4 and dx = Δx = -0.2. (Round the answers to three decimal places.) y = 4x - lost to were to start solving for delta y

    asked on February 26, 2011
  2. College algebra

    Allison drove home at 58 mph, but her brother Austin, who left at the same time, could drive at only 40 mph. When Allison arrived, Austin still had 108 miles to go. How far did Allison drive?

    asked on September 13, 2013
  3. PHYSICS!!

    Comet Halley returns every 74 years. Find the average distance of the comet from the sun. How do i do this??

    asked on January 16, 2008
  4. Physics

    Figure 1 shows a red car and a green car that move toward each other. Figure 2 is a graph of their motion, showing the positions xg0 = 270 m and xr0 = -35.0 m at time t = 0 (time they intersect =12s). The green car has a constant speed of 20.0 m/s and the

    asked on September 4, 2019
  5. chemistry

    How many moles of O2 are needed to react with 2.90 moles C2H2

    asked on October 16, 2010
  6. Physics

    Two forces, 395 N at 11◦ and 344 N at 34◦ are applied to a car in an effort to accelerate it. (3049 kg is the car) What is the magnitude of the resultant of these two forces? Answer in units of N.

    asked on November 18, 2018
  7. physics

    The velocity of a 2.5 kg block sliding down a frictionless inclined plane is found to be 1.58 m/s. 1.40 s later, it has a velocity of 7.32 m/s. What is the angle of the plane with respect to the horizontal (in degrees)?

    asked on February 24, 2011
  8. English

    Please Help Quick Read the passage from Narrative of the Life of Frederick Douglass. I then had to regret that I did not at least make the attempt to carry out my resolution to run away; for the chances of success are tenfold greater from the city than

    asked on October 7, 2019
  9. calculus

    PLEASE HELP Find the first and second derivatives of the function. y = e^8ex. I keep getting y' = e^8ex * 8 and its wrong. how do you do this?

    asked on February 6, 2011
  10. calculus

    Jill likes to play Blackjack. She heard about a winning strategy to ensure she does not lose. The strategy is: choose a starting amount to bet, and then double your bet if you lose. Keep doubling your bet until you win. When you win a hand, go back to the

    asked on November 30, 2010
  11. Math 10th grade

    five marbles in a jar are green. the odds against choosing a green marble are "4:1" how many marbles are in the jar

    asked on March 11, 2010
  12. alabama state

    America's continued demographic trend toward urbanization would eventually result in the majority of the population living in cities, which finally did occur by the time of which U.S. Census reporting period?

    asked on September 8, 2008
  13. physics

    Alice holds a small battery operated device used for tuning instruments that emits the frequency of middle C (262 Hz) while walking with a constant speed of 3.13 m/s toward a building which presents a hard smooth surface and hence reflects sound well. (Use

    asked on February 19, 2020
  14. American History

    Please Help Quick They say its B is it right Why did the Puritans open schools in every town they settled? A. to teach people about democracy B. so children could learn to read the Bible C. so newcomers could learn Puritan laws D. to keep children from

    asked on October 1, 2019
  15. History

    Please Help Quick Which statement does not accurately describe the Black Death that struck Europe in the fourteenth century? A. The effects of the plague stopped all advancements in science and medicine for the next two centuries. B. Most people in Europe

    asked on June 6, 2019
  16. Chemistry

    What is the difference between a commercial Ni-Cd battery and a galvanic cell system of Ni-Cd with nickel chloride concentration of 0.05M and cadmium nitrate concentration od 0.01M

    asked on September 19, 2018

    Hi, I have been stuck on the following question for a couple of hours now and need help. "Describe at least 3 ways that God has demonstrated His love to you personally. Answer in complete sentences." The problem is that i have NO idea how "God has

    asked on December 7, 2015
  18. Practical English

    What is the simple predicate of the following sentence? The Saturn rocket made travel to the moon possible. {A. Made} B. Moon C. Possible {D. Travel} is it A or D?

    asked on December 3, 2014
  19. physics

    During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 0.144-kg baseball crashing through the pane of a second-floor window in a nearby building. The ball strikes the glass at 14.9 m / s, shatters the glass as it passes

    asked on November 4, 2014
  20. physics

    A skier leaves the starting gate at the top of a ski ramp with an initial speed of 4.00 m/s (Figure 6-41). The starting position is 120 m higher than the end of the ramp, which is 3.00 m above the snow. Find the final speed of the skier if he lands 145 m

    asked on October 31, 2014
  21. biology

    dont even know where to start You prepared a 10-fold dilution of a culture out to 10-9. You initially estimated there were between 3 x 108 cells/ml and 5 x 109 cells/ml in the original cell suspension. Which tube dilutions would you plate to ensure you

    asked on October 27, 2014
  22. biology

    You carried out a 10-fold dilution series. You started with tube 0 which contained an overnight culture of E. coli. You estimated the original culture contained 6 x 108 cell/ml using McFarland nephlemeter standards. You plated 0.1 ml volumes of a number of

    asked on October 27, 2014
  23. physics

    'Point charges of 0.26 ìC and 0.79 ìC are placed 0.25 m apart.At what point along the line between them is the electric field zero?'

    asked on September 12, 2014
  24. Algebra

    A stock market analyst was investigating the trends of two independent stocks and was surprised to see that both stocks were at the same unit value after a 12 month period. He knew that both stocks had started at the same value but had undergone different

    asked on August 27, 2014
  25. Algebra

    A new tollway is built. For the first month there is no toll to use the road and each day 4800 cars use it. After the first month it is estimated that for each dollar increase in the toll, 800 fewer cars will use the tollway. At what price do you think the

    asked on August 27, 2014
  26. Algebra

    A tank contains 1200 litres . A tap is turned on and 40 litres of water escape each minute. How much water has escaped in 12 minutes.

    asked on August 27, 2014
  27. Math

    When a cue ball strikes another ball, what is the largest possible angle the struck ball can be deflected from the line along which the cue ball was travelling?

    asked on July 22, 2014
  28. physics

    a strong 100 kg man pushes down hard on the left piston. What happenes to the 10 kg mass on the right? The answer is the moves down, lifting the left piston despite the strong man. BUT WHY?

    asked on June 15, 2014
  29. MATH

    There are 8 boys, 12middle schoolers and 8 girls. what is the ratio of girls to boys?16/12=4:3 divide both sides by 4

    asked on May 21, 2014
  30. physics

    A 70 kg man holding a 0 . 857 kg ball stands on a frozen pond next to a wall. He throws the ball at the wall with a speed of 11 . 9 m / s (relative to the ground) and then catches the ball after it rebounds from the wall. How fast is he moving after he

    asked on May 7, 2014
  31. Chemistry

    The half-life of Th-232 is 1.4E10. Find the number of disintegrations per hour emitted by 1 mol of Th-232.

    asked on April 10, 2014
  32. Chemistry

    The half-life of 232Th is 1.4 * 10^10. Find the number of disintegrations per hour emitted by 1 mil of 232Th in 1 min.

    asked on April 10, 2014
  33. math

    The grade of a road is 6%. What is its angle of elevation?

    asked on February 20, 2014
  34. geometry

    what is the perimeter of a pool 7ft wide 10ft long 4ft high? Is it 34ft squared?

    asked on February 26, 2013
  35. algebra

    an investor invested a total of $2100 in two mutal funds. one fund earned a 9% profit while the other earned a 7% profit.if the total profit was $161 how much was invested in each fund

    asked on January 13, 2013
  36. maths

    kathleen spent 5/8 of her money and had 15e left how much had she at the start

    asked on November 27, 2012
  37. physics

    A person with a density of 980 kg/m3 floats in seawater of density 1025 kg/m3. What fraction of the person is submerged?

    asked on November 26, 2012
  38. CHEM EQB

    How many ml of 0.2M NaH2PO4 should b added to 40 mL of 0.1M Na3PO4 to make the buffer pH 7.2. Ka1:1.1 x 10^-2 Ka2:7.5 x 10^-8 Ka3:4.8 x 10^-13

    asked on November 6, 2012
  39. 7th grade math


    asked on September 4, 2012
  40. Statistics

    suppose the correla tion between SAT Verbal scores and Math scores is .57 and that these scares are normally distributed. IF a student's Verbal score places her at the 90th percentile, at what percentile would you expect her Math scores to be?

    asked on December 20, 2011

    Given: Let f: X -> Y be a function. Then we have an associated function f^(-1): P(Y) -> P(X), where f^(-1) (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just

    asked on November 3, 2011
  42. Math: Intro to Proofs

    Given: Let f: X -> Y be a function. Then we have an associated function f^(-1): P(Y) -> P(X), where f^(-1) (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just

    asked on November 3, 2011
  43. medical terminology

    1. Dr. Hannah places a stethoscope to a seven-year-old child’s chest. The lungs reveal basilar rales. Which method is Dr. Hannah using to perform the physical examination? A. Auscultation C. Percussion B. Palpation D. Visualization 2. Cardiology is the

    asked on March 11, 2011
  44. physics

    In a lab experiment, a 1.5-kg cart traveling at 4.3 m/s in the +x direction collides with a 2.5-kg cart traveling at 2.7 m/s in the -x direction. After the collision, you find that the 2.5-kg cart is traveling at 1.9 m/s in the +x direction. How fast and

    asked on March 8, 2011
  45. calculus

    please help i am lost at what is dy/dx and what is dy/dt. A trough is 10ft long and its ends have the shape of isosceles triangles that are 3 ft across at the top and have a height of 1ft. If the trough is being filled with water at a rate of 12ft^3/min,

    asked on February 25, 2011
  46. physics

    A mass m = 0.225 kg on a frictionless table is attached to a hanging mass M = 0.330 kg by a cord through a hole in the table (see the figure). Find the speed with which m must move in order for M to stay at rest if r = 27 cm.

    asked on February 24, 2011
  47. calculus

    Please help. i am confused on how to do this one. I keep getting arcsin(square root -cos9x) but it is wrong. The probem is F(x)= arcsin(sqtsin(9x))

    asked on February 11, 2011
  48. calculus

    find the derivative of e^8e^x *8e^x

    asked on February 7, 2011
  49. chemistry

    what type of interaction is Mg2+, O2- What type of interaction is Na+, Cl- What type of interaction is I-I What type of interaction is H2CO, and CO What type of interaction is SO2, C6 H14

    asked on February 3, 2011
  50. calculus

    please help! Find an equation of the tangent line to the curve at the point (-1, 1). y = 5x3 - 6x. y=? ...............i keep getting y=x+2 and its wrong. can someone please help?

    asked on January 25, 2011
  51. physics

    A 33 N force acting at 90° and a 44 N force at 60° are applied concurrently at a point P. What is the magnitude and direction of the resultant force?

    asked on November 18, 2010
  52. economics

    what are the theories of david mcclelland?

    asked on November 13, 2010
  53. algebra

    what is the equation of a hyperbola with one vertex at (6,5) and the equation of asymptotes are 5x-6y-30 and 5x+6y-30?

    asked on November 7, 2010
  54. math

    what is the equation of a hyperbola with one vertex at (6,5) and the equation of asymptotes are 5x-6y-30 and 5x+6y-30?

    asked on November 7, 2010
  55. architecture

    can you give me some websites for architectural designs for a 2 bedrooms bungalow?

    asked on November 7, 2010
  56. math

    what is the equation of a hyperbola with one vertex at (6,5) and the equation of asymptotes are 5x-6y-30 and 5x+6y-30?

    asked on November 7, 2010
  57. math

    what is the equation of a hyperbola with one vertex at (6,5) and the equation of asymptotes are 5x-6y-30 and 5x+6y-30?

    asked on November 7, 2010
  58. algebra

    I need to write an equation for the following: Denise's cell phone plan is $29.95 per month plus $.10 per minute for each minute over 300 minutes of call time. Denise's cell phone bill is $99.95. For how many minutes was she billed?

    asked on October 21, 2010
  59. calculus

    Choice 1: Payments of $ 2600 now, $3000 a year from now, and $3450 two years from now. Choice 2: Three yearly payments of $ 3000 starting now. Interest is compounded continuously. (a) If the interest rate on savings were 4.76 %,which would you prefer? (b)

    asked on September 16, 2010
  60. science

    what is the independen variable and the dependent variable for scientific method to how does air pressure in a tire save gas

    asked on September 29, 2009
  61. Algebra 2

    Solve by completing the square: x^2+9x+6=0

    asked on November 4, 2008
  62. math

    i need to solve this equation by completing the square: x^2-14x+1=0 i don't' know how to do this, nor do i know what complete the square means. please help.

    asked on November 4, 2008
  63. college

    why did the united states annex the philippines

    asked on September 27, 2008
  64. sose

    why did the people who lived in the colonies prior to 1901 feel that they needed to join together to make one country?

    asked on May 6, 2008
  65. music

    Hi, I am looking for an old english song, but I don't remember the song title, its a slow love song and the only thing i remember is that the singers are all male and there are more than one, some asian looking probably japanese and also caucasians. The

    asked on April 26, 2008
  66. math

    I need this by tomorrow morning I had $6 to pay for part of lunch. My friend had enough money to pay the other part or 3/5 of the bill. What is the total bill?

    asked on November 26, 2007
  67. Algebra

    I'm having a problem solving the following example. The teacher wants it in this format. 1st the Verbal Model, 2nd the Labels 3rd Algebraic Model 4th- Solve and finally 5th part: Answer Question. Example: You are working on a scouting badge. You need 60

    asked on October 11, 2007
  68. help

    how do u cite the newspaper the couier journal Here is a website that gives you specific instructions and examples for the resource you need to cite. In the future, it would help if you put the SUBJECT in

    asked on February 11, 2007
  1. 6th grd. MATH QUIZ HELP!!!!

    Thanks @Master. I checked all of them, and I got 2 wrong and I fixed them.

    posted on May 4, 2018
  2. Life orientation


    posted on February 17, 2018
  3. american gov

    she only asked what excerpt. calm down.

    posted on December 14, 2017
  4. Government

    DAA is the correct answers.

    posted on November 9, 2017
  5. Algebra 2

    Each individual letter of the word Massachusetts is placed on a piece of​ paper, and all 13 pieces of paper are placed in a hat. If one letter is selected at random from the​ hat, find the probability that a consonant is selected.

    posted on November 4, 2017
  6. Algebra

    It's 1.D 2.B 3.C 4.D

    posted on October 20, 2017
  7. Astronomy

    7.2 x 10E-6 cm

    posted on October 11, 2017
  8. Math


    posted on September 12, 2017
  9. Government

    Monica is correct

    posted on September 1, 2017
  10. Pre Algebra

    So confused ;;;;

    posted on May 2, 2017
  11. P.E. help please

    Yes, you and 1 are correct.

    posted on April 12, 2017
  12. geography


    posted on March 28, 2017
  13. math

    Not for connection academy

    posted on March 3, 2017
  14. math

    Actually my bad im stupid I meant to say that its 12 questions in all. the 12th one being the essay. Gray is correct for anyone's quiz I described above. Every single one. For everyone else i'm unsure. But just to re-cap grays answers; 1.) B 2.) C 3.) A

    posted on March 2, 2017
  15. math

    So wait, I'm on Lesson 5 (Polygons and Angles), Unit 4 (Geometry). This entire post is a mess and I don't think anyone could ever understand any of this. I'll tell you what guys. If any of you are at Lesson 5 (Polygons and Angles), Unit 4 (Geometry) with

    posted on March 2, 2017
  16. Social Studies

    Actually, number 3 is not entirely correct. It's A and B. Not B and C. Number two, is B. The rest you got correct.

    posted on January 24, 2017
  17. government

    A is incorrect. I believe it should be C, but you were on the right track though. I think House members serve 2 year terms...

    posted on January 23, 2017

    I believe it's A. J=10H j+6=4(H+6) Hope this is correct and it helps anyone.

    posted on January 20, 2017
  19. science

    It is B, It will move to the right.

    posted on January 18, 2017
  20. Computers

    HI is correct.

    posted on December 13, 2016
  21. socialstdies

    The answer to the first one is definitely C. Then 4 should be D.

    posted on November 8, 2016
  22. SS

    No, the answer is C.

    posted on October 3, 2016
  23. help please:)

    Which of these most helps in information retention?

    posted on July 29, 2015
  24. Practical English

    Im leaning towards D...

    posted on December 3, 2014
  25. Finance


    posted on October 26, 2014
  26. chemistry

    2Na + S --> Na2S 20g Na x (1 mole Na)/(23g Na) = 0.87 mol Na 0.87 mole Na x (1 mol Na2S)/(2 mol Na) x (55.1g Na2S)/(1 mol Na2S) =23.97g Na2S

    posted on October 6, 2014
  27. statistics


    posted on September 16, 2014
  28. World Geography


    posted on August 11, 2014
  29. nervous system

    yea wat is it

    posted on July 23, 2014
  30. Health


    posted on July 23, 2014
  31. ECON

    did you possibly find the answer to this? im stuck on it aswell :)

    posted on April 19, 2013