# noel

Popular questions and responses by noel
1. ## Math

In traingle DEF, DE=18m and EF=6m. Side FD maybe

2. ## Math/Algebra

In the school election, votes were cast for Sam, Mary, and Bill in the ratio of 4:3:2. If a total of 2,178 votes were cast, how many votes did Mary receive?

For drivers over 21 years of age DWI or DUI is defined as a. A BAC of 0.08 or higher b. A BAC of 0.10 or higher c. A BAC of 0.20 or higher d. any amount of alcohol in the blood Thanks!

4. ## TRIGONOMETRY

Suppose tan theta=15pi/18 is less than theta 3pi/2 , what are the other trigonometric functions?

5. ## Chemistry

Given the balanced equation: a. Fe2O3+3C=2Fe+3CO: b. How many moles of Fe are produced when 1.36 moles of carbon monoxide are produced? c. How many grams of Fe is part b equal to? d. how many molecules of Fe are in part B

6. ## trig

Determine the period, amplitude and phase shift for each given function: A)y = -4 cos 3x + 5 B)y = 2/3 sin (30x-90degrees)-10 c)y = -0.38 tan (x/3+pi/3) d)y = pi cos(2x)+ pi

7. ## physics

Quartz has a refractive index of 1.54. If light from a HeNe laser impinges on an air/quartz interface at an angle of 22.5 degrees, what is the angle of refraction?

8. ## Chemistry

0.10 M potassium chromate is slowly added to a solution containing 0.50 M AgNO3 and 0.50 M Ba(NO3)2. What is the Ag+ concentration when BaCrO4 just starts to precipitate? The Ksp for Ag2CrO4 and BaCrO4 are 1.1 x 10-12 and respectively.

9. ## chemistry

Calculate the pH of a 0.800 M NaCH3CO2 solution. Ka for acetic acid, CH3CO2H, is

10. ## chemistry

If 0.10 M potassium chromate is slowly added to a solution containing 0.50 M AgNO3 and 0.50 M Ba(NO3)2. What is the Ag+ concentration when BaCrO4 just starts to precipitate? The Ksp for Ag2CrO4 and BaCrO4 are 1.1 x 10-12 and respectively.

HELP: PART 1 1. What was the result of the 1995 referendum held in Quebec? A. Quebec separated from Canada* B. French became the official language of Canada C. Quebec's people voted to remain part of Canada D. Quebec became part of France 2. Early Spanish,

12. ## trigonometric identities

Prove the following trigonometric identities 1. tanx = sinx + sin^2x/cosx(1+sinx) 2. cos^3+(cosx)(sin^2x) = 1/secx

13. ## Math (need formula)

I would be very appreciative if someone could provide me with the formula I would use to plug these figures into a graph. 3. A 2m length of board rests with one end on the floor and the other end on a small stack of bricks. A baseball is rolled up the

14. ## dependance of a man on the enviroment

How do deforestation and urban sprawl affect the greater food web?

15. ## chemistry

if PV=RT + ἁP where ἁ is a constant Calculate the work if the gas is heated at constant pressure from T1 to T2 Calculate the work if the gas is expanded isothermally and reversibly

16. ## science

Ammonia gas can be prepared by the reaction of a metal oxide such as calcium oxide with ammonium chloride. CaO(s) + 2 NH4Cl(s) 2 NH3(g) + H2O(g) + CaCl2(s) If 199 g of CaO and 300. g of NH4Cl are mixed, what mass of NH3can be produced?

17. ## chemistry

A piece of metal weighing 26g is immersed in a quantity of water in a graduated cylinder. The initial volume of the water was 16.0 ml and volume of water plus metal is 22.0 ml. The density of metal in g/ml is? If you get this right i will hand you over my

18. ## chemistry

What is the oxidation number of PO4 in the compound Ca3(PO4)2? how do you get it?

19. ## HISTORY

Does this sentence make any sense and is it accurate? The Soviet Union, however, rejected the Marshall Plan due to the belief that they could not keep a close eye on the satellite states in the Eastern bloc and that the West was trying to enforce their

20. ## Biometrics

If these samples were drawn from a population with mean male weight of 180 and mean female weight of 165, what is the probability that the difference between the mean male and female weights would be greater than the observed sample? (The sample means are

21. ## social studies

What were some common ideas shared by the first colonists in each of the New England, Middle, and Southern Colonies?

Tanø(secø+2)

23. ## Math

Each homeroom of a middle school receives 1/12- acre plot of 5/6 acre of land. How many classrooms receive a plot of land. 5/6 divided by 4840 is this correct

24. ## Math

On a map with a scale of 1:100m, what is the actual area of a land in hectares if it is 180 sq.m on the map?

25. ## Statistics

A distribution of test scores of 600 examinees follows a normal distriburion with an everage of 80 having a standard deviation 12, how many examinees would you expect to find above a score of 100?

26. ## physics

If 0.055 kg of ice at 0 ∘C is added to 0.330 kg of water at 32 ∘C in a 0.100-kg aluminum calorimeter cup, what is the final temperature of the water?

27. ## Physics

A car of mass 1390 kg rests on a hydraulic lift with a piston of radius 0.26 m that is connected to a second piston of radius 0.033 m. If the car is just barely lifted off the ground, what is the force at the second piston? I Tried F1/F2 = r1^2 / r2^2 ==>

28. ## Physics

A tennis ball is dropped from 1.54 m above the ground. It rebounds to a height of 0.845 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s^2 . (Let down be negative.) Answer in units of m/s.

29. ## Physics

A crate of mass 40 kg is pushed up a ramp by a person as shown in the figure below. The person pushes the crate a distance of 14 m as measured along the ramp. Assume the crate moves at constant velocity. Assume the coefficient of kinetic friction between

30. ## Science 1 question

A researcher, studying dolphins in the wild, made the following sketch. Each dot on the map represents one dolphin. The area surveyed by the scientist was 1 km ^2. Based on the researcher's data, how many dolphins would you estimate to be in a 3 km ^2

31. ## SS please check and help

What different reasons did the European nations have for exploration? Provide at least one example specific to Spain, France, and Britain. Where did Spain, France, and Britain choose to settle while exploring? Why did they settle these particular areas? MY

32. ## math

If the sum of first n term is 1600,and the common different is 2 while the 1st term is 1.find n?

33. ## chemistry

A buffer with a pH of 4.30 contains 0.25 M of sodium benzoate and 0.20 M of benzoic acid. What is the concentration of [H ] in the solution after the addition of 0.052 mol of HCl to a final volume of 1.5 L? I know that Ka = 6.3x10-5 do I need to use an ice

34. ## math

a tray with a square base is to be made from a square piece of cardboard by cutting 5 inch squares from each corner and folding up the sides. If the box is to hold a volume 520 cubic inches, find the length of the piece of cardboard that is needed.

35. ## gen chem

use the rydberg equation to calculate the wavelength in A of the photon absorbed when a hydrogen atom undergoes a transition from n=7 to n=9

36. ## MATHS

please help me ...Experiments show that radium at rate proportional to the amount of radium present at the moment . if half life is 1590 years what percentage will disappear in one year ??

37. ## MATHS

experiments show that radium disintegrates at a rate proportional to the amount of radium present at the moment . if half life is 1590 years what percentage will disappear in one year?

38. ## history

ways non-Muslims were treated in the Islamic world?

39. ## math

Find opxthe volume of a rectangular box 9 feet by 7.1 feet by 7 feet.

1. θ is a first quadrant angle in standard position and cos 1/(sqrt10)= . Find the exact value of sin . 2. feta is a second quadrant angle in standard position and tan(feta) -((sqrt5)/2) = . Find the exact value of cos(feta) . 3. θ is an angle in

41. ## math

Simplify each of the following: 1. 16*(2^x)+2 2. 3[sqrt(x^1/4)*sqrt(x)/5*sqrt(x^2)] 3. ab^(2x+y)/a^x b^x

Simplify the following using the laws of exponents: Need help with these: a) (9)^1/2 x 4^2/24 b) 16 x 2^x+2 Simplify each of the following: b) b) 3 sqrt x^1/4 sqrt x/ 5 sqrt x^2 c) (ab)^2x+y /a^x b^y Need these answers double checked: c) 3^-8/3^-6 x 3^-5

43. ## math

5. Find the slope of the secant to the curve f(x) = 0.25(4)^x - 2 between: i) x = 0 and x = 1 ii) x = 0 and x = 0.5 iii) x = 0 and x = 0.1 iv) x = 0 and x = 0.01

44. ## math

7. Determine the inverse of each relation given. a. f(x) = 1/x-2 + 3 b. f(x) = 2(x – 4)^2 + 5

45. ## Physics

When a 0.50 kg-object is attached to a vertically supported spring, it stretches 0.10 m from the equilibrium position. Find k for the spring.

46. ## physics

Given x(t) = xm cos 2ðt/T for a spring with constant k and attached mass m sketch as a function of t, (a) the displacement x, (b) the velocity v, (c) the acceleration.

47. ## calculus(integral)

intergral 2x^2/(x^2+4x+8)

48. ## mind and machine

What figure from the history of philosophy section do you think might have some views that are similar, or at least relevant, to your own?

49. ## physical chemistry

find the ph of the solution that results from the addition of 25ml of 0.1mol/l NaOH solution to 50ml of 0.1mol/l HCL solution?

50. ## Chemistry

A flask partially full of liquid water is heated to boiling and capped cold water is poured over the flask. The water boils even more vigorously explain

51. ## physics

Calculate the frequency in hertz, wavelength in nm, and the velocity in m/s of light inside a material with a refractive index of 1.39. In vacuum, the light has a wavelength of 514.5nm

52. ## chemistry

the work done by the system during a certain adiabatic process is 200J. What is the change in U of the system

53. ## Chemistry

what would be the effect on a chromatographic peak of introducing the sample at too slow a rate

54. ## chemistry

how would the graph of Pressure vs Volume look for a sample of an ideal gas that has a volume of 1 L at 0 degrees Celsius and 1 bar. How would the graph of Pressure versus volume look for sample of gas at the same conditions but at 100 degrees Celsius?

55. ## statistics

what is the 4σ rule of thumb in statistics

56. ## chemistry

calculate the rms speeds of He at 10, 100, and 1000 K in meters per second and in miles per hour. What values would be otained if the pressure was 10^-10 bar

57. ## chemistry

calculate the pressure (in Pascals and bar) of 10^23 gas particles each with a mass of 10^-25 kg, in a 1 L container if the rms speed is 100m/s? What is the total kinetic energy of these particles? What is the temperature inside the container

58. ## chemistry

calculate the pressure in Pa and bar of 10^23 gas particles each with a mass of 10^-25 kg, in a 1 liter container if the rms speed is 100m/s

59. ## history

hey coould anyone tell me is the title lord in the 1700's england was compatible with involvement in the royal navy?

60. ## Maths

How do I work out square roots without a calculator?

61. ## If...=, find...

If h(x)=3/(2x+1), find h^-1(x)

62. ## pre-algebra

how do i identify the slope snd y-intercept of the graph of each equation. Then graph the equation? plz help asap!

63. ## Computers

How would you test an object-oriented design’s sequence diagrams? Be specific.

64. ## geometry

ok, so i don't understand this question. : which postulate justifies the following statement? "exactly one plane contains

65. ## History

What's the difference between COMECON and COMINIFORM? Thanks in advance! http://en.wikipedia.org/wiki/Comecon http://en.wikipedia.org/wiki/Cominform

8...

67. ## HISTORY...

What is the EU (European Union)? Was is successful? Why or why not? The EU now consists of most countries of Europe. It started out as the "Common Market" following World War II and kept growing. It is very successful. More countries are eager to join. The

68. ## Biometrics II

If these samples were drawn from a population with mean male weight of 180 and mean female weight of 165, what is the probability that the difference between the mean male and female weights would lie between 4.5 and 27.8?

1. ## Social Studies

Why didn't you look in your social studies book the answer to your question is on page 540 in the paragraph where it says How did Buddhist monks spread ideas? the answer is in the 2nd and 3rd sentence read your book and you will know don't just jump right

posted on April 2, 2020
2. ## Language arts

Anonymous is 100% correct!!

posted on March 18, 2020
3. ## Technology

ik the answers is 100% correct.

posted on March 17, 2020
4. ## Math

Thank you Book of Answers you are correct

posted on March 13, 2020
5. ## language arts

Connexus User is always wrong don't trust him/her

posted on March 13, 2020
6. ## ELA

Helpful person I got a 14/26 you are a bum! don't trust them!

posted on March 11, 2020
7. ## English

Incorrect is 100% correct!

posted on March 11, 2020
8. ## computers

1. A 2. C 3. D 4. C

posted on March 10, 2020
9. ## Social studies HELP

Thx Willow you helped me a lot I just copied and pasted the anserws and changed them up a bit. I actually knew what the answers were I just didn't know how to word them.

posted on March 10, 2020
10. ## social studies

posted on March 6, 2020
11. ## ed tech

posted on March 6, 2020
12. ## History

Thanks Hoi! Me TeM 100% correct

posted on March 4, 2020
13. ## Science

Thx answers and this is a bruh moment

posted on February 28, 2020
14. ## Music

wtf mrs. sue is not going to respond to you because she is dead

posted on February 26, 2020
15. ## Music

Woopy Doop is 100% correct

posted on February 26, 2020
16. ## Social studies

Thank you A faithful friend I only use these answers to check my work to see if I got anything wrong.

posted on February 26, 2020
17. ## maths

7kg

posted on July 22, 2019
18. ## Math

How do you find the finance charge?

posted on October 19, 2018
19. ## Physics

the weight of the displaced water is more than the weight of the cubic solid of plastic

posted on July 18, 2017
20. ## SS please check and help

Okay... I think I get it now. Thank you SO much! :)

posted on September 28, 2015
21. ## SS please check and help

I'm still really confused.

posted on September 28, 2015
22. ## SS please check and help

Also, on this one I am stumped: Select two groups of Native American people from two different areas within the United States. The areas you can select from include the North, West, Southwest, Plains, and East/Southeast. Explain how environmental factors

posted on September 28, 2015

posted on March 20, 2015

Okay, 2 more questions sorry The state in which a person's ability to function mentally or physically is impaired is called a. a hangover b. a blackout c. intoxication d. a coma Another term for alcohol poisoning is a. hangover b. blackout c. intoxication

posted on March 20, 2015

Hi Reed, What are the answers to 1 and 2 then?

posted on March 18, 2015

HELP: PART 2 1. One way that European settlement changed the lives of the native peoples in the Plains region was by A. Exposing them to new diseases* B. Building schools for their children C. Giving them free land D. Teaching them how to farm their land

posted on March 18, 2015
27. ## history

middle east, late 1300's-1700's

posted on July 13, 2014