# Nic

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 - x2....im lost to were to start solving for delta y

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?

3. ## PHYSICS!!

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

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

5. ## chemistry

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

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.

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)?

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

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?

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

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

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?

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

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

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

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

17. ## BIBLE HELP ASAP

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

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?

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

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

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

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

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?'

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

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

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.

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?

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?

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

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

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.

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.

33. ## math

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

34. ## geometry

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

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

36. ## maths

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

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?

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

-6(2r-4)

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?

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

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

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

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

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,

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.

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))

48. ## calculus

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

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

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?

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?

52. ## economics

what are the theories of david mcclelland?

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?

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?

55. ## architecture

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

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?

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?

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?

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)

60. ## science

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

61. ## Algebra 2

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

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.

63. ## college

why did the united states annex the philippines

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?

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

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?

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

68. ## help

how do u cite the newspaper the couier journal http://owl.english.purdue.edu/owl/resource/557/08/ 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

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

dsfsf

posted on February 17, 2018
3. ## american gov

she only asked what excerpt. calm down.

posted on December 14, 2017
4. ## Government

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

54

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

Yes, you and 1 are correct.

posted on April 12, 2017
12. ## geography

OMG THANK YOU

posted on March 28, 2017
13. ## math

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
18. ## MATH NEED HELP ASAP!!!!!

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

posted on October 3, 2016

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

23

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

\$12,533.65

posted on September 16, 2014
28. ## World Geography

idk

posted on August 11, 2014
29. ## nervous system

yea wat is it

posted on July 23, 2014
30. ## Health

wrong

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